成员(属性)
ArcGisBaseMapType enumerates the ArcGIS image tile layers that are supported by default.
属性:
属性名称 |
类型 |
描述信息 |
SATELLITE |
number
|
|
OCEANS |
number
|
|
HILLSHADE |
number
|
|
参考:
ArcType defines the path that should be taken connecting vertices.
属性:
属性名称 |
类型 |
描述信息 |
NONE |
number
|
Straight line that does not conform to the surface of the ellipsoid. |
GEODESIC |
number
|
Follow geodesic path. |
RHUMB |
number
|
Follow rhumb or loxodrome path. |
An enum describing the x, y, and z axes and helper conversion functions.
属性:
属性名称 |
类型 |
描述信息 |
X |
number
|
Denotes the x-axis. |
Y |
number
|
Denotes the y-axis. |
Z |
number
|
Denotes the z-axis. |
The types of imagery provided by Bing Maps.
属性:
属性名称 |
类型 |
描述信息 |
AERIAL |
string
|
Aerial imagery. |
AERIAL_WITH_LABELS |
string
|
Aerial imagery with a road overlay. |
AERIAL_WITH_LABELS_ON_DEMAND |
string
|
Aerial imagery with a road overlay. |
ROAD |
string
|
Roads without additional imagery. |
ROAD_ON_DEMAND |
string
|
Roads without additional imagery. |
CANVAS_DARK |
string
|
A dark version of the road maps. |
CANVAS_LIGHT |
string
|
A lighter version of the road maps. |
CANVAS_GRAY |
string
|
A grayscale version of the road maps. |
ORDNANCE_SURVEY |
string
|
Ordnance Survey imagery. This imagery is visible only for the London, UK area. |
COLLINS_BART |
string
|
Collins Bart imagery. |
参考:
Determines how two pixels' values are combined.
属性:
属性名称 |
类型 |
描述信息 |
ADD |
number
|
Pixel values are added componentwise. This is used in additive blending for translucency. |
SUBTRACT |
number
|
Pixel values are subtracted componentwise (source - destination). This is used in alpha blending for translucency. |
REVERSE_SUBTRACT |
number
|
Pixel values are subtracted componentwise (destination - source). |
MIN |
number
|
Pixel values are given to the minimum function (min(source, destination)).
This equation operates on each pixel color component. |
MAX |
number
|
Pixel values are given to the maximum function (max(source, destination)).
This equation operates on each pixel color component. |
Determines how blending factors are computed.
属性:
属性名称 |
类型 |
描述信息 |
ZERO |
number
|
The blend factor is zero. |
ONE |
number
|
The blend factor is one. |
SOURCE_COLOR |
number
|
The blend factor is the source color. |
ONE_MINUS_SOURCE_COLOR |
number
|
The blend factor is one minus the source color. |
DESTINATION_COLOR |
number
|
The blend factor is the destination color. |
ONE_MINUS_DESTINATION_COLOR |
number
|
The blend factor is one minus the destination color. |
SOURCE_ALPHA |
number
|
The blend factor is the source alpha. |
ONE_MINUS_SOURCE_ALPHA |
number
|
The blend factor is one minus the source alpha. |
DESTINATION_ALPHA |
number
|
The blend factor is the destination alpha. |
ONE_MINUS_DESTINATION_ALPHA |
number
|
The blend factor is one minus the destination alpha. |
CONSTANT_COLOR |
number
|
The blend factor is the constant color. |
ONE_MINUS_CONSTANT_COLOR |
number
|
The blend factor is one minus the constant color. |
CONSTANT_ALPHA |
number
|
The blend factor is the constant alpha. |
ONE_MINUS_CONSTANT_ALPHA |
number
|
The blend factor is one minus the constant alpha. |
SOURCE_ALPHA_SATURATE |
number
|
The blend factor is the saturated source alpha. |
Determines how opaque and translucent parts of billboards, points, and labels are blended with the scene.
属性:
属性名称 |
类型 |
描述信息 |
OPAQUE |
number
|
The billboards, points, or labels in the collection are completely opaque. |
TRANSLUCENT |
number
|
The billboards, points, or labels in the collection are completely translucent. |
OPAQUE_AND_TRANSLUCENT |
number
|
The billboards, points, or labels in the collection are both opaque and translucent. |
Enumerates the available input for interacting with the camera.
属性:
属性名称 |
类型 |
描述信息 |
LEFT_DRAG |
number
|
A left mouse button press followed by moving the mouse and releasing the button. |
RIGHT_DRAG |
number
|
A right mouse button press followed by moving the mouse and releasing the button. |
MIDDLE_DRAG |
number
|
A middle mouse button press followed by moving the mouse and releasing the button. |
WHEEL |
number
|
Scrolling the middle mouse button. |
PINCH |
number
|
A two-finger touch on a touch surface. |
Defines how per-feature colors set from the Cesium API or declarative styling blend with the source colors from
the original feature, e.g. glTF material or per-point color in the tile.
When REPLACE
or MIX
are used and the source color is a glTF material, the technique must assign the
_3DTILESDIFFUSE
semantic to the diffuse color parameter. Otherwise only HIGHLIGHT
is supported.
A feature whose color evaluates to white (1.0, 1.0, 1.0) is always rendered without color blending, regardless of the
tileset's color blend mode.
"techniques": {
"technique0": {
"parameters": {
"diffuse": {
"semantic": "_3DTILESDIFFUSE",
"type": 35666
}
}
}
}
属性:
属性名称 |
类型 |
描述信息 |
HIGHLIGHT |
number
|
Multiplies the source color by the feature color. |
REPLACE |
number
|
Replaces the source color with the feature color. |
MIX |
number
|
Blends the source color and feature color together. |
Contains functions for checking that supplied arguments are of a specified type
or meet specified conditions
Whether a classification affects terrain, 3D Tiles or both.
属性:
属性名称 |
类型 |
描述信息 |
TERRAIN |
number
|
Only terrain will be classified. |
CESIUM_3D_TILE |
number
|
Only 3D Tiles will be classified. |
BOTH |
number
|
Both terrain and 3D Tiles will be classified. |
The name of the metadata class
The the `MetadataClassProperty` that is described by this
structure, as obtained from the `MetadataSchema`
属性:
参考:
Constants to determine how much time advances with each call
to
Clock#tick
.
属性:
属性名称 |
类型 |
描述信息 |
TICK_DEPENDENT |
number
|
Clock#tick advances the current time by a fixed step,
which is the number of seconds specified by Clock#multiplier . |
SYSTEM_CLOCK_MULTIPLIER |
number
|
Clock#tick advances the current time by the amount of system
time elapsed since the previous call multiplied by Clock#multiplier . |
SYSTEM_CLOCK |
number
|
Clock#tick sets the clock to the current system time;
ignoring all other settings. |
参考:
属性:
属性名称 |
类型 |
描述信息 |
CUMULUS |
number
|
Cumulus cloud. |
Defines different modes for blending between a target color and a primitive's source color.
HIGHLIGHT multiplies the source color by the target color
REPLACE replaces the source color with the target color
MIX blends the source color and target color together
属性:
属性名称 |
类型 |
描述信息 |
HIGHLIGHT |
number
|
|
REPLACE |
number
|
|
MIX |
number
|
|
参考:
WebGL component datatypes. Components are intrinsics,
which form attributes, which form vertices.
属性:
属性名称 |
类型 |
描述信息 |
BYTE |
number
|
8-bit signed byte corresponding to gl.BYTE and the type
of an element in Int8Array . |
UNSIGNED_BYTE |
number
|
8-bit unsigned byte corresponding to UNSIGNED_BYTE and the type
of an element in Uint8Array . |
SHORT |
number
|
16-bit signed short corresponding to SHORT and the type
of an element in Int16Array . |
UNSIGNED_SHORT |
number
|
16-bit unsigned short corresponding to UNSIGNED_SHORT and the type
of an element in Uint16Array . |
INT |
number
|
32-bit signed int corresponding to INT and the type
of an element in Int32Array . |
UNSIGNED_INT |
number
|
32-bit unsigned int corresponding to UNSIGNED_INT and the type
of an element in Uint32Array . |
FLOAT |
number
|
32-bit floating-point corresponding to FLOAT and the type
of an element in Float32Array . |
DOUBLE |
number
|
64-bit floating-point corresponding to gl.DOUBLE (in Desktop OpenGL;
this is not supported in WebGL, and is emulated in Cesium via GeometryPipeline.encodeAttribute )
and the type of an element in Float64Array . |
Style options for corners.
属性:
属性名称 |
类型 |
描述信息 |
ROUNDED |
number
|
Corner has a smooth edge. |
MITERED |
number
|
Corner point is the intersection of adjacent edges. |
BEVELED |
number
|
Corner is clipped. |
Demo:
Determines which triangles, if any, are culled.
属性:
属性名称 |
类型 |
描述信息 |
FRONT |
number
|
Front-facing triangles are culled. |
BACK |
number
|
Back-facing triangles are culled. |
FRONT_AND_BACK |
number
|
Both front-facing and back-facing triangles are culled. |
An enum describing how the
CustomShader
will be added to the
fragment shader. This determines how the shader interacts with the material.
属性:
属性名称 |
类型 |
描述信息 |
MODIFY_MATERIAL |
string
|
The custom shader will be used to modify the results of the material stage
before lighting is applied. |
REPLACE_MATERIAL |
string
|
The custom shader will be used instead of the material stage. This is a hint
to optimize out the material processing code. |
Experimental
This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.
An enum for controling how
CustomShader
handles translucency compared with the original
primitive.
属性:
属性名称 |
类型 |
描述信息 |
INHERIT |
number
|
Inherit translucency settings from the primitive's material. If the primitive used a
translucent material, the custom shader will also be considered translucent. If the primitive
used an opaque material, the custom shader will be considered opaque. |
OPAQUE |
number
|
Force the primitive to render the primitive as opaque, ignoring any material settings. |
TRANSLUCENT |
number
|
Force the primitive to render the primitive as translucent, ignoring any material settings. |
Experimental
This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.
Determines the function used to compare two depths for the depth test.
属性:
属性名称 |
类型 |
描述信息 |
NEVER |
number
|
The depth test never passes. |
LESS |
number
|
The depth test passes if the incoming depth is less than the stored depth. |
EQUAL |
number
|
The depth test passes if the incoming depth is equal to the stored depth. |
LESS_OR_EQUAL |
number
|
The depth test passes if the incoming depth is less than or equal to the stored depth. |
GREATER |
number
|
The depth test passes if the incoming depth is greater than the stored depth. |
NOT_EQUAL |
number
|
The depth test passes if the incoming depth is not equal to the stored depth. |
GREATER_OR_EQUAL |
number
|
The depth test passes if the incoming depth is greater than or equal to the stored depth. |
ALWAYS |
number
|
The depth test always passes. |
Atmosphere lighting effects (sky atmosphere, ground atmosphere, fog) can be
further modified with dynamic lighting from the sun or other light source
that changes over time. This enum determines which light source to use.
属性:
属性名称 |
类型 |
描述信息 |
NONE |
number
|
Do not use dynamic atmosphere lighting. Atmosphere lighting effects will
be lit from directly above rather than using the scene's light source. |
SCENE_LIGHT |
number
|
Use the scene's current light source for dynamic atmosphere lighting. |
SUNLIGHT |
number
|
Force the dynamic atmosphere lighting to always use the sunlight direction,
even if the scene uses a different light source. |
EPSG codes known to not include reverse axis orders, and are within 4000-5000.
Constants to determine how an interpolated value is extrapolated
when querying outside the bounds of available data.
属性:
属性名称 |
类型 |
描述信息 |
NONE |
number
|
No extrapolation occurs. |
HOLD |
number
|
The first or last value is used when outside the range of sample data. |
EXTRAPOLATE |
number
|
The value is extrapolated. |
参考:
属性:
属性名称 |
类型 |
描述信息 |
SEARCH |
number
|
Perform a search where the input is considered complete. |
AUTOCOMPLETE |
number
|
Perform an auto-complete using partial input, typically
reserved for providing possible results as a user is typing. |
参考:
The encoding that is used for a heightmap
属性:
属性名称 |
类型 |
描述信息 |
NONE |
number
|
No encoding |
LERC |
number
|
LERC encoding |
Represents the position relative to the terrain.
属性:
属性名称 |
类型 |
描述信息 |
NONE |
number
|
The position is absolute. |
CLAMP_TO_GROUND |
number
|
The position is clamped to the terrain and 3D Tiles. |
RELATIVE_TO_GROUND |
number
|
The position height is the height above the terrain and 3D Tiles. |
CLAMP_TO_TERRAIN |
number
|
The position is clamped to terain. |
RELATIVE_TO_TERRAIN |
number
|
The position height is the height above terrain. |
CLAMP_TO_3D_TILE |
number
|
The position is clamped to 3D Tiles. |
RELATIVE_TO_3D_TILE |
number
|
The position height is the height above 3D Tiles. |
The horizontal location of an origin relative to an object, e.g., a
Billboard
or
Label
. For example, setting the horizontal origin to
LEFT
or
RIGHT
will display a billboard to the left or right (in screen space)
of the anchor position.
属性:
属性名称 |
类型 |
描述信息 |
CENTER |
number
|
The origin is at the horizontal center of the object. |
LEFT |
number
|
The origin is on the left side of the object. |
RIGHT |
number
|
The origin is on the right side of the object. |
参考:
EPSG codes known to include reverse axis orders, but are not within 4000-5000.
Constants for WebGL index datatypes. These corresponds to the
type
parameter of
drawElements.
属性:
属性名称 |
类型 |
描述信息 |
UNSIGNED_BYTE |
number
|
8-bit unsigned byte corresponding to UNSIGNED_BYTE and the type
of an element in Uint8Array . |
UNSIGNED_SHORT |
number
|
16-bit unsigned short corresponding to UNSIGNED_SHORT and the type
of an element in Uint16Array . |
UNSIGNED_INT |
number
|
32-bit unsigned int corresponding to UNSIGNED_INT and the type
of an element in Uint32Array . |
This enumerated type is used in determining where, relative to the frustum, an
object is located. The object can either be fully contained within the frustum (INSIDE),
partially inside the frustum and partially outside (INTERSECTING), or somewhere entirely
outside of the frustum's 6 planes (OUTSIDE).
属性:
属性名称 |
类型 |
描述信息 |
OUTSIDE |
number
|
Represents that an object is not contained within the frustum. |
INTERSECTING |
number
|
Represents that an object intersects one of the frustum's planes. |
INSIDE |
number
|
Represents that an object is fully within the frustum. |
Underlying geocoding services that can be used via Cesium ion.
属性:
属性名称 |
类型 |
描述信息 |
GOOGLE |
string
|
Google geocoder, for use with Google data. |
BING |
string
|
Bing geocoder, for use with Bing data. |
DEFAULT |
string
|
Use the default geocoder as set on the server. Used when neither Bing or
Google data is used. |
The types of imagery provided by createWorldImagery
.
属性:
属性名称 |
类型 |
描述信息 |
AERIAL |
number
|
Aerial imagery. |
AERIAL_WITH_LABELS |
number
|
Aerial imagery with a road overlay. |
ROAD |
number
|
Roads without additional imagery. |
This enumerated type is for representing keyboard modifiers. These are keys
that are held down in addition to other event types.
属性:
属性名称 |
类型 |
描述信息 |
SHIFT |
number
|
Represents the shift key being held down. |
CTRL |
number
|
Represents the control key being held down. |
ALT |
number
|
Represents the alt key being held down. |
Describes how to draw a label.
属性:
属性名称 |
类型 |
描述信息 |
FILL |
number
|
Fill the text of the label, but do not outline. |
OUTLINE |
number
|
Outline the text of the label, but do not fill. |
FILL_AND_OUTLINE |
number
|
Fill and outline the text of the label. |
参考:
The lighting model to use for lighting a
Model
.
属性:
属性名称 |
类型 |
描述信息 |
UNLIT |
number
|
Use unlit shading, i.e. skip lighting calculations. The model's
diffuse color (assumed to be linear RGB, not sRGB) is used directly
when computing out_FragColor . The alpha mode is still
applied. |
PBR |
number
|
Use physically-based rendering lighting calculations. This includes
both PBR metallic roughness and PBR specular glossiness. Image-based
lighting is also applied when possible. |
Experimental
This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.
Describes how the map will operate in 2D.
属性:
属性名称 |
类型 |
描述信息 |
ROTATE |
number
|
The 2D map can be rotated about the z axis. |
INFINITE_SCROLL |
number
|
The 2D map can be scrolled infinitely in the horizontal direction. |
An enum of metadata component types.
属性:
属性名称 |
类型 |
描述信息 |
INT8 |
string
|
An 8-bit signed integer |
UINT8 |
string
|
An 8-bit unsigned integer |
INT16 |
string
|
A 16-bit signed integer |
UINT16 |
string
|
A 16-bit unsigned integer |
INT32 |
string
|
A 32-bit signed integer |
UINT32 |
string
|
A 32-bit unsigned integer |
INT64 |
string
|
A 64-bit signed integer. This type requires BigInt support. |
UINT64 |
string
|
A 64-bit signed integer. This type requires BigInt support |
FLOAT32 |
string
|
A 32-bit (single precision) floating point number |
FLOAT64 |
string
|
A 64-bit (double precision) floating point number |
Experimental
This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.
The `PropertyTextureProperty` or `PropertyAttributeProperty` that
is described by this structure, as obtained from the property texture
or property attribute of the `StructuralMetadata` that matches the
class name and property name.
An enum of metadata types. These metadata types are containers containing
one or more components of type
MetadataComponentType
属性:
属性名称 |
类型 |
描述信息 |
SCALAR |
string
|
A single component |
VEC2 |
string
|
A vector with two components |
VEC3 |
string
|
A vector with three components |
VEC4 |
string
|
A vector with four components |
MAT2 |
string
|
A 2x2 matrix, stored in column-major format. |
MAT3 |
string
|
A 3x3 matrix, stored in column-major format. |
MAT4 |
string
|
A 4x4 matrix, stored in column-major format. |
BOOLEAN |
string
|
A boolean (true/false) value |
STRING |
string
|
A UTF-8 encoded string value |
ENUM |
string
|
An enumerated value. This type is used in conjunction with a MetadataEnum to describe the valid values. |
Experimental
This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.
Determines if and how a glTF animation is looped.
属性:
属性名称 |
类型 |
描述信息 |
NONE |
number
|
Play the animation once; do not loop it. |
REPEAT |
number
|
Loop the animation playing it from the start immediately after it stops. |
MIRRORED_REPEAT |
number
|
Loop the animation. First, playing it forward, then in reverse, then forward, and so on. |
参考:
The data type of a pixel.
属性:
属性名称 |
类型 |
描述信息 |
UNSIGNED_BYTE |
number
|
|
UNSIGNED_SHORT |
number
|
|
UNSIGNED_INT |
number
|
|
FLOAT |
number
|
|
HALF_FLOAT |
number
|
|
UNSIGNED_INT_24_8 |
number
|
|
UNSIGNED_SHORT_4_4_4_4 |
number
|
|
UNSIGNED_SHORT_5_5_5_1 |
number
|
|
UNSIGNED_SHORT_5_6_5 |
number
|
|
参考:
The format of a pixel, i.e., the number of components it has and what they represent.
属性:
属性名称 |
类型 |
描述信息 |
DEPTH_COMPONENT |
number
|
A pixel format containing a depth value. |
DEPTH_STENCIL |
number
|
A pixel format containing a depth and stencil value, most often used with PixelDatatype.UNSIGNED_INT_24_8 . |
ALPHA |
number
|
A pixel format containing an alpha channel. |
RED |
number
|
A pixel format containing a red channel |
R |
number
|
|
RG |
number
|
A pixel format containing red and green channels. |
RGB |
number
|
A pixel format containing red, green, and blue channels. |
RGBA |
number
|
A pixel format containing red, green, blue, and alpha channels. |
LUMINANCE |
number
|
A pixel format containing a luminance (intensity) channel. |
LUMINANCE_ALPHA |
number
|
A pixel format containing luminance (intensity) and alpha channels. |
RGB_DXT1 |
number
|
A pixel format containing red, green, and blue channels that is DXT1 compressed. |
RGBA_DXT1 |
number
|
A pixel format containing red, green, blue, and alpha channels that is DXT1 compressed. |
RGBA_DXT3 |
number
|
A pixel format containing red, green, blue, and alpha channels that is DXT3 compressed. |
RGBA_DXT5 |
number
|
A pixel format containing red, green, blue, and alpha channels that is DXT5 compressed. |
RGB_PVRTC_4BPPV1 |
number
|
A pixel format containing red, green, and blue channels that is PVR 4bpp compressed. |
RGB_PVRTC_2BPPV1 |
number
|
A pixel format containing red, green, and blue channels that is PVR 2bpp compressed. |
RGBA_PVRTC_4BPPV1 |
number
|
A pixel format containing red, green, blue, and alpha channels that is PVR 4bpp compressed. |
RGBA_PVRTC_2BPPV1 |
number
|
A pixel format containing red, green, blue, and alpha channels that is PVR 2bpp compressed. |
RGBA_ASTC |
number
|
A pixel format containing red, green, blue, and alpha channels that is ASTC compressed. |
RGB_ETC1 |
number
|
A pixel format containing red, green, and blue channels that is ETC1 compressed. |
RGB8_ETC2 |
number
|
A pixel format containing red, green, and blue channels that is ETC2 compressed. |
RGBA8_ETC2_EAC |
number
|
A pixel format containing red, green, blue, and alpha channels that is ETC2 compressed. |
RGBA_BC7 |
number
|
A pixel format containing red, green, blue, and alpha channels that is BC7 compressed. |
属性:
属性名称 |
类型 |
描述信息 |
NEAREST |
number
|
Samples the texture by returning the closest texel. |
LINEAR |
number
|
Samples the texture through bi-linear interpolation of the four nearest texels. |
The type of a geometric primitive, i.e., points, lines, and triangles.
属性:
属性名称 |
类型 |
描述信息 |
POINTS |
number
|
Points primitive where each vertex (or index) is a separate point. |
LINES |
number
|
Lines primitive where each two vertices (or indices) is a line segment. Line segments are not necessarily connected. |
LINE_LOOP |
number
|
Line loop primitive where each vertex (or index) after the first connects a line to
the previous vertex, and the last vertex implicitly connects to the first. |
LINE_STRIP |
number
|
Line strip primitive where each vertex (or index) after the first connects a line to the previous vertex. |
TRIANGLES |
number
|
Triangles primitive where each three vertices (or indices) is a triangle. Triangles do not necessarily share edges. |
TRIANGLE_STRIP |
number
|
Triangle strip primitive where each vertex (or index) after the first two connect to
the previous two vertices forming a triangle. For example, this can be used to model a wall. |
TRIANGLE_FAN |
number
|
Triangle fan primitive where each vertex (or index) after the first two connect to
the previous vertex and the first vertex forming a triangle. For example, this can be used
to model a cone or circle. |
The name of the metadata property
Constants for identifying well-known reference frames.
属性:
属性名称 |
类型 |
描述信息 |
FIXED |
number
|
The fixed frame. |
INERTIAL |
number
|
The inertial frame. |
State of the request.
属性:
属性名称 |
类型 |
描述信息 |
UNISSUED |
number
|
Initial unissued state. |
ISSUED |
number
|
Issued but not yet active. Will become active when open slots are available. |
ACTIVE |
number
|
Actual http request has been sent. |
RECEIVED |
number
|
Request completed successfully. |
CANCELLED |
number
|
Request was cancelled, either explicitly or automatically because of low priority. |
FAILED |
number
|
Request failed. |
An enum identifying the type of request. Used for finer grained logging and priority sorting.
属性:
属性名称 |
类型 |
描述信息 |
TERRAIN |
number
|
Terrain request. |
IMAGERY |
number
|
Imagery request. |
TILES3D |
number
|
3D Tiles request. |
OTHER |
number
|
Other request. |
Indicates if the scene is viewed in 3D, 2D, or 2.5D Columbus view.
属性:
属性名称 |
类型 |
描述信息 |
MORPHING |
number
|
Morphing between mode, e.g., 3D to 2D. |
COLUMBUS_VIEW |
number
|
Columbus View mode. A 2.5D perspective view where the map is laid out
flat and objects with non-zero height are drawn above it. |
SCENE2D |
number
|
2D mode. The map is viewed top-down with an orthographic projection. |
SCENE3D |
number
|
3D mode. A traditional 3D perspective view of the globe. |
参考:
The optional ID of the metadata schema
This enumerated type is for classifying mouse events: down, up, click, double click, move and move while a button is held down.
属性:
属性名称 |
类型 |
描述信息 |
LEFT_DOWN |
number
|
Represents a mouse left button down event. |
LEFT_UP |
number
|
Represents a mouse left button up event. |
LEFT_CLICK |
number
|
Represents a mouse left click event. |
LEFT_DOUBLE_CLICK |
number
|
Represents a mouse left double click event. |
RIGHT_DOWN |
number
|
Represents a mouse left button down event. |
RIGHT_UP |
number
|
Represents a mouse right button up event. |
RIGHT_CLICK |
number
|
Represents a mouse right click event. |
MIDDLE_DOWN |
number
|
Represents a mouse middle button down event. |
MIDDLE_UP |
number
|
Represents a mouse middle button up event. |
MIDDLE_CLICK |
number
|
Represents a mouse middle click event. |
MOUSE_MOVE |
number
|
Represents a mouse move event. |
WHEEL |
number
|
Represents a mouse wheel event. |
PINCH_START |
number
|
Represents the start of a two-finger event on a touch surface. |
PINCH_END |
number
|
Represents the end of a two-finger event on a touch surface. |
PINCH_MOVE |
number
|
Represents a change of a two-finger event on a touch surface. |
Constants used to indicated what part of the sensor volume to display.
属性:
属性名称 |
类型 |
描述信息 |
COMPLETE |
Number
|
0x0000. Display the complete sensor volume. |
BELOW_ELLIPSOID_HORIZON |
Number
|
0x0001. Display the portion of the sensor volume that lies below the true horizon of the ellipsoid. |
ABOVE_ELLIPSOID_HORIZON |
Number
|
0x0002. Display the portion of the sensor volume that lies above the true horizon of the ellipsoid. |
The maximum number of intersections against the shape for any ray direction.
Specifies whether the object casts or receives shadows from light sources when
shadows are enabled.
属性:
属性名称 |
类型 |
描述信息 |
DISABLED |
number
|
The object does not cast or receive shadows. |
ENABLED |
number
|
The object casts and receives shadows. |
CAST_ONLY |
number
|
The object casts shadows only. |
RECEIVE_ONLY |
number
|
The object receives shadows only. |
属性:
属性名称 |
类型 |
描述信息 |
LEFT |
number
|
Display the primitive or ImageryLayer to the left of the Scene#splitPosition . |
NONE |
number
|
Always display the primitive or ImageryLayer. |
RIGHT |
number
|
Display the primitive or ImageryLayer to the right of the Scene#splitPosition . |
参考:
Determines the function used to compare stencil values for the stencil test.
属性:
属性名称 |
类型 |
描述信息 |
NEVER |
number
|
The stencil test never passes. |
LESS |
number
|
The stencil test passes when the masked reference value is less than the masked stencil value. |
EQUAL |
number
|
The stencil test passes when the masked reference value is equal to the masked stencil value. |
LESS_OR_EQUAL |
number
|
The stencil test passes when the masked reference value is less than or equal to the masked stencil value. |
GREATER |
number
|
The stencil test passes when the masked reference value is greater than the masked stencil value. |
NOT_EQUAL |
number
|
The stencil test passes when the masked reference value is not equal to the masked stencil value. |
GREATER_OR_EQUAL |
number
|
The stencil test passes when the masked reference value is greater than or equal to the masked stencil value. |
ALWAYS |
number
|
The stencil test always passes. |
Determines the action taken based on the result of the stencil test.
属性:
属性名称 |
类型 |
描述信息 |
ZERO |
number
|
Sets the stencil buffer value to zero. |
KEEP |
number
|
Does not change the stencil buffer. |
REPLACE |
number
|
Replaces the stencil buffer value with the reference value. |
INCREMENT |
number
|
Increments the stencil buffer value, clamping to unsigned byte. |
DECREMENT |
number
|
Decrements the stencil buffer value, clamping to zero. |
INVERT |
number
|
Bitwise inverts the existing stencil buffer value. |
INCREMENT_WRAP |
number
|
Increments the stencil buffer value, wrapping to zero when exceeding the unsigned byte range. |
DECREMENT_WRAP |
number
|
Decrements the stencil buffer value, wrapping to the maximum unsigned byte instead of going below zero. |
An enum of storage types for covariance information.
This reflects the `gltfGpmLocal.storageType` definition of the
NGA_gpm_local glTF extension.
属性:
属性名称 |
类型 |
描述信息 |
Direct |
string
|
Store the full error covariance of the anchor points, to include the cross-covariance terms |
Indirect |
string
|
A full covariance matrix is stored for each of the anchor points. However, in this case the
cross-covariance terms are not directly stored, but can be computed by a set of spatial
correlation function parameters which are stored in the metadata. |
Experimental
This feature is not final and is subject to change without Cesium's standard deprecation policy.
属性:
属性名称 |
类型 |
描述信息 |
HORIZONTAL |
number
|
Horizontal orientation. |
VERTICAL |
number
|
Vertical orientation. |
Enumerates all possible filters used when magnifying WebGL textures.
属性:
属性名称 |
类型 |
描述信息 |
NEAREST |
number
|
Samples the texture by returning the closest pixel. |
LINEAR |
number
|
Samples the texture through bi-linear interpolation of the four nearest pixels. This produces smoother results than NEAREST filtering. |
参考:
Enumerates all possible filters used when minifying WebGL textures.
属性:
属性名称 |
类型 |
描述信息 |
NEAREST |
number
|
Samples the texture by returning the closest pixel. |
LINEAR |
number
|
Samples the texture through bi-linear interpolation of the four nearest pixels. This produces smoother results than NEAREST filtering. |
NEAREST_MIPMAP_NEAREST |
number
|
Selects the nearest mip level and applies nearest sampling within that level.
Requires that the texture has a mipmap. The mip level is chosen by the view angle and screen-space size of the texture.
|
LINEAR_MIPMAP_NEAREST |
number
|
Selects the nearest mip level and applies linear sampling within that level.
Requires that the texture has a mipmap. The mip level is chosen by the view angle and screen-space size of the texture.
|
NEAREST_MIPMAP_LINEAR |
number
|
Read texture values with nearest sampling from two adjacent mip levels and linearly interpolate the results.
This option provides a good balance of visual quality and speed when sampling from a mipmapped texture.
Requires that the texture has a mipmap. The mip level is chosen by the view angle and screen-space size of the texture.
|
LINEAR_MIPMAP_LINEAR |
number
|
Read texture values with linear sampling from two adjacent mip levels and linearly interpolate the results.
This option provides a good balance of visual quality and speed when sampling from a mipmapped texture.
Requires that the texture has a mipmap. The mip level is chosen by the view angle and screen-space size of the texture.
|
参考:
Provides the type of time standards which JulianDate can take as input.
属性:
属性名称 |
类型 |
描述信息 |
UTC |
number
|
Represents the coordinated Universal Time (UTC) time standard.
UTC is related to TAI according to the relationship
UTC = TAI - deltaT where deltaT is the number of leap
seconds which have been introduced as of the time in TAI. |
TAI |
number
|
Represents the International Atomic Time (TAI) time standard.
TAI is the principal time standard to which the other time standards are related. |
参考:
A tonemapping algorithm when rendering with high dynamic range.
属性:
属性名称 |
类型 |
描述信息 |
REINHARD |
string
|
Use the Reinhard tonemapping. |
MODIFIED_REINHARD |
string
|
Use the modified Reinhard tonemapping. |
FILMIC |
string
|
Use the Filmic tonemapping. |
ACES |
string
|
Use the ACES tonemapping. |
PBR_NEUTRAL |
string
|
Use the PBR Neutral tonemapping from Khronos. |
Constants for identifying well-known tracking reference frames.
属性:
属性名称 |
类型 |
描述信息 |
AUTODETECT |
number
|
Auto-detect algorithm. The reference frame used to track the Entity will
be automatically selected based on its trajectory: near-surface slow moving
objects will be tracked in the entity's local east-north-up reference
frame, while faster objects like satellites will use VVLH (Vehicle Velocity,
Local Horizontal). |
ENU |
number
|
The entity's local East-North-Up reference frame. |
INERTIAL |
number
|
The entity's inertial reference frame. If entity has no defined orientation
property, it falls back to auto-detect algorithm. |
VELOCITY |
number
|
The entity's inertial reference frame with orientation fixed to its
VelocityOrientationProperty , ignoring its own orientation. |
An enum of the basic GLSL uniform types. These can be used with
CustomShader
to declare user-defined uniforms.
属性:
属性名称 |
类型 |
描述信息 |
FLOAT |
string
|
A single floating point value. |
VEC2 |
string
|
A vector of 2 floating point values. |
VEC3 |
string
|
A vector of 3 floating point values. |
VEC4 |
string
|
A vector of 4 floating point values. |
INT |
string
|
A single integer value |
INT_VEC2 |
string
|
A vector of 2 integer values. |
INT_VEC3 |
string
|
A vector of 3 integer values. |
INT_VEC4 |
string
|
A vector of 4 integer values. |
BOOL |
string
|
A single boolean value. |
BOOL_VEC2 |
string
|
A vector of 2 boolean values. |
BOOL_VEC3 |
string
|
A vector of 3 boolean values. |
BOOL_VEC4 |
string
|
A vector of 4 boolean values. |
MAT2 |
string
|
A 2x2 matrix of floating point values. |
MAT3 |
string
|
A 3x3 matrix of floating point values. |
MAT4 |
string
|
A 3x3 matrix of floating point values. |
SAMPLER_2D |
string
|
A 2D sampled texture. |
SAMPLER_CUBE |
string
|
|
Experimental
This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.
An enum for the GLSL varying types. These can be used for declaring varyings
in
CustomShader
属性:
属性名称 |
类型 |
描述信息 |
FLOAT |
string
|
A single floating point value. |
VEC2 |
string
|
A vector of 2 floating point values. |
VEC3 |
string
|
A vector of 3 floating point values. |
VEC4 |
string
|
A vector of 4 floating point values. |
MAT2 |
string
|
A 2x2 matrix of floating point values. |
MAT3 |
string
|
A 3x3 matrix of floating point values. |
MAT4 |
string
|
A 3x3 matrix of floating point values. |
Experimental
This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.
The vertical location of an origin relative to an object, e.g., a
Billboard
or
Label
. For example, setting the vertical origin to
TOP
or
BOTTOM
will display a billboard above or below (in screen space)
the anchor position.
属性:
属性名称 |
类型 |
描述信息 |
CENTER |
number
|
The origin is at the vertical center between BASELINE and TOP . |
BOTTOM |
number
|
The origin is at the bottom of the object. |
BASELINE |
number
|
If the object contains text, the origin is at the baseline of the text, else the origin is at the bottom of the object. |
TOP |
number
|
The origin is at the top of the object. |
参考:
This enumerated type is used in determining to what extent an object, the occludee,
is visible during horizon culling. An occluder may fully block an occludee, in which case
it has no visibility, may partially block an occludee from view, or may not block it at all,
leading to full visibility.
属性:
属性名称 |
类型 |
描述信息 |
NONE |
number
|
Represents that no part of an object is visible. |
PARTIAL |
number
|
Represents that part, but not all, of an object is visible |
FULL |
number
|
Represents that an object is visible in its entirety. |
An enum of voxel shapes. The shape controls how the voxel grid is mapped to 3D space.
属性:
属性名称 |
类型 |
描述信息 |
BOX |
string
|
A box shape. |
ELLIPSOID |
string
|
An ellipsoid shape. |
CYLINDER |
string
|
A cylinder shape. |
Experimental
This feature is not final and is subject to change without Cesium's standard deprecation policy.
Enum containing WebGL Constant values by name.
for use without an active WebGL context, or in cases where certain constants are unavailable using the WebGL context
(For example, in
Safari 9).
These match the constants from the
WebGL 1.0
and
WebGL 2.0
specifications.
属性:
属性名称 |
类型 |
描述信息 |
DEPTH_BUFFER_BIT |
number
|
|
STENCIL_BUFFER_BIT |
number
|
|
COLOR_BUFFER_BIT |
number
|
|
POINTS |
number
|
|
LINES |
number
|
|
LINE_LOOP |
number
|
|
LINE_STRIP |
number
|
|
TRIANGLES |
number
|
|
TRIANGLE_STRIP |
number
|
|
TRIANGLE_FAN |
number
|
|
ZERO |
number
|
|
ONE |
number
|
|
SRC_COLOR |
number
|
|
ONE_MINUS_SRC_COLOR |
number
|
|
SRC_ALPHA |
number
|
|
ONE_MINUS_SRC_ALPHA |
number
|
|
DST_ALPHA |
number
|
|
ONE_MINUS_DST_ALPHA |
number
|
|
DST_COLOR |
number
|
|
ONE_MINUS_DST_COLOR |
number
|
|
SRC_ALPHA_SATURATE |
number
|
|
FUNC_ADD |
number
|
|
BLEND_EQUATION |
number
|
|
BLEND_EQUATION_RGB |
number
|
|
BLEND_EQUATION_ALPHA |
number
|
|
FUNC_SUBTRACT |
number
|
|
FUNC_REVERSE_SUBTRACT |
number
|
|
BLEND_DST_RGB |
number
|
|
BLEND_SRC_RGB |
number
|
|
BLEND_DST_ALPHA |
number
|
|
BLEND_SRC_ALPHA |
number
|
|
CONSTANT_COLOR |
number
|
|
ONE_MINUS_CONSTANT_COLOR |
number
|
|
CONSTANT_ALPHA |
number
|
|
ONE_MINUS_CONSTANT_ALPHA |
number
|
|
BLEND_COLOR |
number
|
|
ARRAY_BUFFER |
number
|
|
ELEMENT_ARRAY_BUFFER |
number
|
|
ARRAY_BUFFER_BINDING |
number
|
|
ELEMENT_ARRAY_BUFFER_BINDING |
number
|
|
STREAM_DRAW |
number
|
|
STATIC_DRAW |
number
|
|
DYNAMIC_DRAW |
number
|
|
BUFFER_SIZE |
number
|
|
BUFFER_USAGE |
number
|
|
CURRENT_VERTEX_ATTRIB |
number
|
|
FRONT |
number
|
|
BACK |
number
|
|
FRONT_AND_BACK |
number
|
|
CULL_FACE |
number
|
|
BLEND |
number
|
|
DITHER |
number
|
|
STENCIL_TEST |
number
|
|
DEPTH_TEST |
number
|
|
SCISSOR_TEST |
number
|
|
POLYGON_OFFSET_FILL |
number
|
|
SAMPLE_ALPHA_TO_COVERAGE |
number
|
|
SAMPLE_COVERAGE |
number
|
|
NO_ERROR |
number
|
|
INVALID_ENUM |
number
|
|
INVALID_VALUE |
number
|
|
INVALID_OPERATION |
number
|
|
OUT_OF_MEMORY |
number
|
|
CW |
number
|
|
CCW |
number
|
|
LINE_WIDTH |
number
|
|
ALIASED_POINT_SIZE_RANGE |
number
|
|
ALIASED_LINE_WIDTH_RANGE |
number
|
|
CULL_FACE_MODE |
number
|
|
FRONT_FACE |
number
|
|
DEPTH_RANGE |
number
|
|
DEPTH_WRITEMASK |
number
|
|
DEPTH_CLEAR_VALUE |
number
|
|
DEPTH_FUNC |
number
|
|
STENCIL_CLEAR_VALUE |
number
|
|
STENCIL_FUNC |
number
|
|
STENCIL_FAIL |
number
|
|
STENCIL_PASS_DEPTH_FAIL |
number
|
|
STENCIL_PASS_DEPTH_PASS |
number
|
|
STENCIL_REF |
number
|
|
STENCIL_VALUE_MASK |
number
|
|
STENCIL_WRITEMASK |
number
|
|
STENCIL_BACK_FUNC |
number
|
|
STENCIL_BACK_FAIL |
number
|
|
STENCIL_BACK_PASS_DEPTH_FAIL |
number
|
|
STENCIL_BACK_PASS_DEPTH_PASS |
number
|
|
STENCIL_BACK_REF |
number
|
|
STENCIL_BACK_VALUE_MASK |
number
|
|
STENCIL_BACK_WRITEMASK |
number
|
|
VIEWPORT |
number
|
|
SCISSOR_BOX |
number
|
|
COLOR_CLEAR_VALUE |
number
|
|
COLOR_WRITEMASK |
number
|
|
UNPACK_ALIGNMENT |
number
|
|
PACK_ALIGNMENT |
number
|
|
MAX_TEXTURE_SIZE |
number
|
|
MAX_VIEWPORT_DIMS |
number
|
|
SUBPIXEL_BITS |
number
|
|
RED_BITS |
number
|
|
GREEN_BITS |
number
|
|
BLUE_BITS |
number
|
|
ALPHA_BITS |
number
|
|
DEPTH_BITS |
number
|
|
STENCIL_BITS |
number
|
|
POLYGON_OFFSET_UNITS |
number
|
|
POLYGON_OFFSET_FACTOR |
number
|
|
TEXTURE_BINDING_2D |
number
|
|
SAMPLE_BUFFERS |
number
|
|
SAMPLES |
number
|
|
SAMPLE_COVERAGE_VALUE |
number
|
|
SAMPLE_COVERAGE_INVERT |
number
|
|
COMPRESSED_TEXTURE_FORMATS |
number
|
|
DONT_CARE |
number
|
|
FASTEST |
number
|
|
NICEST |
number
|
|
GENERATE_MIPMAP_HINT |
number
|
|
BYTE |
number
|
|
UNSIGNED_BYTE |
number
|
|
SHORT |
number
|
|
UNSIGNED_SHORT |
number
|
|
INT |
number
|
|
UNSIGNED_INT |
number
|
|
FLOAT |
number
|
|
DEPTH_COMPONENT |
number
|
|
ALPHA |
number
|
|
RGB |
number
|
|
RGBA |
number
|
|
LUMINANCE |
number
|
|
LUMINANCE_ALPHA |
number
|
|
UNSIGNED_SHORT_4_4_4_4 |
number
|
|
UNSIGNED_SHORT_5_5_5_1 |
number
|
|
UNSIGNED_SHORT_5_6_5 |
number
|
|
FRAGMENT_SHADER |
number
|
|
VERTEX_SHADER |
number
|
|
MAX_VERTEX_ATTRIBS |
number
|
|
MAX_VERTEX_UNIFORM_VECTORS |
number
|
|
MAX_VARYING_VECTORS |
number
|
|
MAX_COMBINED_TEXTURE_IMAGE_UNITS |
number
|
|
MAX_VERTEX_TEXTURE_IMAGE_UNITS |
number
|
|
MAX_TEXTURE_IMAGE_UNITS |
number
|
|
MAX_FRAGMENT_UNIFORM_VECTORS |
number
|
|
SHADER_TYPE |
number
|
|
DELETE_STATUS |
number
|
|
LINK_STATUS |
number
|
|
VALIDATE_STATUS |
number
|
|
ATTACHED_SHADERS |
number
|
|
ACTIVE_UNIFORMS |
number
|
|
ACTIVE_ATTRIBUTES |
number
|
|
SHADING_LANGUAGE_VERSION |
number
|
|
CURRENT_PROGRAM |
number
|
|
NEVER |
number
|
|
LESS |
number
|
|
EQUAL |
number
|
|
LEQUAL |
number
|
|
GREATER |
number
|
|
NOTEQUAL |
number
|
|
GEQUAL |
number
|
|
ALWAYS |
number
|
|
KEEP |
number
|
|
REPLACE |
number
|
|
INCR |
number
|
|
DECR |
number
|
|
INVERT |
number
|
|
INCR_WRAP |
number
|
|
DECR_WRAP |
number
|
|
VENDOR |
number
|
|
RENDERER |
number
|
|
VERSION |
number
|
|
NEAREST |
number
|
|
LINEAR |
number
|
|
NEAREST_MIPMAP_NEAREST |
number
|
|
LINEAR_MIPMAP_NEAREST |
number
|
|
NEAREST_MIPMAP_LINEAR |
number
|
|
LINEAR_MIPMAP_LINEAR |
number
|
|
TEXTURE_MAG_FILTER |
number
|
|
TEXTURE_MIN_FILTER |
number
|
|
TEXTURE_WRAP_S |
number
|
|
TEXTURE_WRAP_T |
number
|
|
TEXTURE_2D |
number
|
|
TEXTURE |
number
|
|
TEXTURE_CUBE_MAP |
number
|
|
TEXTURE_BINDING_CUBE_MAP |
number
|
|
TEXTURE_CUBE_MAP_POSITIVE_X |
number
|
|
TEXTURE_CUBE_MAP_NEGATIVE_X |
number
|
|
TEXTURE_CUBE_MAP_POSITIVE_Y |
number
|
|
TEXTURE_CUBE_MAP_NEGATIVE_Y |
number
|
|
TEXTURE_CUBE_MAP_POSITIVE_Z |
number
|
|
TEXTURE_CUBE_MAP_NEGATIVE_Z |
number
|
|
MAX_CUBE_MAP_TEXTURE_SIZE |
number
|
|
TEXTURE0 |
number
|
|
TEXTURE1 |
number
|
|
TEXTURE2 |
number
|
|
TEXTURE3 |
number
|
|
TEXTURE4 |
number
|
|
TEXTURE5 |
number
|
|
TEXTURE6 |
number
|
|
TEXTURE7 |
number
|
|
TEXTURE8 |
number
|
|
TEXTURE9 |
number
|
|
TEXTURE10 |
number
|
|
TEXTURE11 |
number
|
|
TEXTURE12 |
number
|
|
TEXTURE13 |
number
|
|
TEXTURE14 |
number
|
|
TEXTURE15 |
number
|
|
TEXTURE16 |
number
|
|
TEXTURE17 |
number
|
|
TEXTURE18 |
number
|
|
TEXTURE19 |
number
|
|
TEXTURE20 |
number
|
|
TEXTURE21 |
number
|
|
TEXTURE22 |
number
|
|
TEXTURE23 |
number
|
|
TEXTURE24 |
number
|
|
TEXTURE25 |
number
|
|
TEXTURE26 |
number
|
|
TEXTURE27 |
number
|
|
TEXTURE28 |
number
|
|
TEXTURE29 |
number
|
|
TEXTURE30 |
number
|
|
TEXTURE31 |
number
|
|
ACTIVE_TEXTURE |
number
|
|
REPEAT |
number
|
|
CLAMP_TO_EDGE |
number
|
|
MIRRORED_REPEAT |
number
|
|
FLOAT_VEC2 |
number
|
|
FLOAT_VEC3 |
number
|
|
FLOAT_VEC4 |
number
|
|
INT_VEC2 |
number
|
|
INT_VEC3 |
number
|
|
INT_VEC4 |
number
|
|
BOOL |
number
|
|
BOOL_VEC2 |
number
|
|
BOOL_VEC3 |
number
|
|
BOOL_VEC4 |
number
|
|
FLOAT_MAT2 |
number
|
|
FLOAT_MAT3 |
number
|
|
FLOAT_MAT4 |
number
|
|
SAMPLER_2D |
number
|
|
SAMPLER_CUBE |
number
|
|
VERTEX_ATTRIB_ARRAY_ENABLED |
number
|
|
VERTEX_ATTRIB_ARRAY_SIZE |
number
|
|
VERTEX_ATTRIB_ARRAY_STRIDE |
number
|
|
VERTEX_ATTRIB_ARRAY_TYPE |
number
|
|
VERTEX_ATTRIB_ARRAY_NORMALIZED |
number
|
|
VERTEX_ATTRIB_ARRAY_POINTER |
number
|
|
VERTEX_ATTRIB_ARRAY_BUFFER_BINDING |
number
|
|
IMPLEMENTATION_COLOR_READ_TYPE |
number
|
|
IMPLEMENTATION_COLOR_READ_FORMAT |
number
|
|
COMPILE_STATUS |
number
|
|
LOW_FLOAT |
number
|
|
MEDIUM_FLOAT |
number
|
|
HIGH_FLOAT |
number
|
|
LOW_INT |
number
|
|
MEDIUM_INT |
number
|
|
HIGH_INT |
number
|
|
FRAMEBUFFER |
number
|
|
RENDERBUFFER |
number
|
|
RGBA4 |
number
|
|
RGB5_A1 |
number
|
|
RGB565 |
number
|
|
DEPTH_COMPONENT16 |
number
|
|
STENCIL_INDEX |
number
|
|
STENCIL_INDEX8 |
number
|
|
DEPTH_STENCIL |
number
|
|
RENDERBUFFER_WIDTH |
number
|
|
RENDERBUFFER_HEIGHT |
number
|
|
RENDERBUFFER_INTERNAL_FORMAT |
number
|
|
RENDERBUFFER_RED_SIZE |
number
|
|
RENDERBUFFER_GREEN_SIZE |
number
|
|
RENDERBUFFER_BLUE_SIZE |
number
|
|
RENDERBUFFER_ALPHA_SIZE |
number
|
|
RENDERBUFFER_DEPTH_SIZE |
number
|
|
RENDERBUFFER_STENCIL_SIZE |
number
|
|
FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE |
number
|
|
FRAMEBUFFER_ATTACHMENT_OBJECT_NAME |
number
|
|
FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL |
number
|
|
FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE |
number
|
|
COLOR_ATTACHMENT0 |
number
|
|
DEPTH_ATTACHMENT |
number
|
|
STENCIL_ATTACHMENT |
number
|
|
DEPTH_STENCIL_ATTACHMENT |
number
|
|
NONE |
number
|
|
FRAMEBUFFER_COMPLETE |
number
|
|
FRAMEBUFFER_INCOMPLETE_ATTACHMENT |
number
|
|
FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT |
number
|
|
FRAMEBUFFER_INCOMPLETE_DIMENSIONS |
number
|
|
FRAMEBUFFER_UNSUPPORTED |
number
|
|
FRAMEBUFFER_BINDING |
number
|
|
RENDERBUFFER_BINDING |
number
|
|
MAX_RENDERBUFFER_SIZE |
number
|
|
INVALID_FRAMEBUFFER_OPERATION |
number
|
|
UNPACK_FLIP_Y_WEBGL |
number
|
|
UNPACK_PREMULTIPLY_ALPHA_WEBGL |
number
|
|
CONTEXT_LOST_WEBGL |
number
|
|
UNPACK_COLORSPACE_CONVERSION_WEBGL |
number
|
|
BROWSER_DEFAULT_WEBGL |
number
|
|
COMPRESSED_RGB_S3TC_DXT1_EXT |
number
|
|
COMPRESSED_RGBA_S3TC_DXT1_EXT |
number
|
|
COMPRESSED_RGBA_S3TC_DXT3_EXT |
number
|
|
COMPRESSED_RGBA_S3TC_DXT5_EXT |
number
|
|
COMPRESSED_RGB_PVRTC_4BPPV1_IMG |
number
|
|
COMPRESSED_RGB_PVRTC_2BPPV1_IMG |
number
|
|
COMPRESSED_RGBA_PVRTC_4BPPV1_IMG |
number
|
|
COMPRESSED_RGBA_PVRTC_2BPPV1_IMG |
number
|
|
COMPRESSED_RGBA_ASTC_4x4_WEBGL |
number
|
|
COMPRESSED_RGB_ETC1_WEBGL |
number
|
|
COMPRESSED_RGBA_BPTC_UNORM |
number
|
|
HALF_FLOAT_OES |
number
|
|
DOUBLE |
number
|
|
READ_BUFFER |
number
|
|
UNPACK_ROW_LENGTH |
number
|
|
UNPACK_SKIP_ROWS |
number
|
|
UNPACK_SKIP_PIXELS |
number
|
|
PACK_ROW_LENGTH |
number
|
|
PACK_SKIP_ROWS |
number
|
|
PACK_SKIP_PIXELS |
number
|
|
COLOR |
number
|
|
DEPTH |
number
|
|
STENCIL |
number
|
|
RED |
number
|
|
RGB8 |
number
|
|
RGBA8 |
number
|
|
RGB10_A2 |
number
|
|
TEXTURE_BINDING_3D |
number
|
|
UNPACK_SKIP_IMAGES |
number
|
|
UNPACK_IMAGE_HEIGHT |
number
|
|
TEXTURE_3D |
number
|
|
TEXTURE_WRAP_R |
number
|
|
MAX_3D_TEXTURE_SIZE |
number
|
|
UNSIGNED_INT_2_10_10_10_REV |
number
|
|
MAX_ELEMENTS_VERTICES |
number
|
|
MAX_ELEMENTS_INDICES |
number
|
|
TEXTURE_MIN_LOD |
number
|
|
TEXTURE_MAX_LOD |
number
|
|
TEXTURE_BASE_LEVEL |
number
|
|
TEXTURE_MAX_LEVEL |
number
|
|
MIN |
number
|
|
MAX |
number
|
|
DEPTH_COMPONENT24 |
number
|
|
MAX_TEXTURE_LOD_BIAS |
number
|
|
TEXTURE_COMPARE_MODE |
number
|
|
TEXTURE_COMPARE_FUNC |
number
|
|
CURRENT_QUERY |
number
|
|
QUERY_RESULT |
number
|
|
QUERY_RESULT_AVAILABLE |
number
|
|
STREAM_READ |
number
|
|
STREAM_COPY |
number
|
|
STATIC_READ |
number
|
|
STATIC_COPY |
number
|
|
DYNAMIC_READ |
number
|
|
DYNAMIC_COPY |
number
|
|
MAX_DRAW_BUFFERS |
number
|
|
DRAW_BUFFER0 |
number
|
|
DRAW_BUFFER1 |
number
|
|
DRAW_BUFFER2 |
number
|
|
DRAW_BUFFER3 |
number
|
|
DRAW_BUFFER4 |
number
|
|
DRAW_BUFFER5 |
number
|
|
DRAW_BUFFER6 |
number
|
|
DRAW_BUFFER7 |
number
|
|
DRAW_BUFFER8 |
number
|
|
DRAW_BUFFER9 |
number
|
|
DRAW_BUFFER10 |
number
|
|
DRAW_BUFFER11 |
number
|
|
DRAW_BUFFER12 |
number
|
|
DRAW_BUFFER13 |
number
|
|
DRAW_BUFFER14 |
number
|
|
DRAW_BUFFER15 |
number
|
|
MAX_FRAGMENT_UNIFORM_COMPONENTS |
number
|
|
MAX_VERTEX_UNIFORM_COMPONENTS |
number
|
|
SAMPLER_3D |
number
|
|
SAMPLER_2D_SHADOW |
number
|
|
FRAGMENT_SHADER_DERIVATIVE_HINT |
number
|
|
PIXEL_PACK_BUFFER |
number
|
|
PIXEL_UNPACK_BUFFER |
number
|
|
PIXEL_PACK_BUFFER_BINDING |
number
|
|
PIXEL_UNPACK_BUFFER_BINDING |
number
|
|
FLOAT_MAT2x3 |
number
|
|
FLOAT_MAT2x4 |
number
|
|
FLOAT_MAT3x2 |
number
|
|
FLOAT_MAT3x4 |
number
|
|
FLOAT_MAT4x2 |
number
|
|
FLOAT_MAT4x3 |
number
|
|
SRGB |
number
|
|
SRGB8 |
number
|
|
SRGB8_ALPHA8 |
number
|
|
COMPARE_REF_TO_TEXTURE |
number
|
|
RGBA32F |
number
|
|
RGB32F |
number
|
|
RGBA16F |
number
|
|
RGB16F |
number
|
|
VERTEX_ATTRIB_ARRAY_INTEGER |
number
|
|
MAX_ARRAY_TEXTURE_LAYERS |
number
|
|
MIN_PROGRAM_TEXEL_OFFSET |
number
|
|
MAX_PROGRAM_TEXEL_OFFSET |
number
|
|
MAX_VARYING_COMPONENTS |
number
|
|
TEXTURE_2D_ARRAY |
number
|
|
TEXTURE_BINDING_2D_ARRAY |
number
|
|
R11F_G11F_B10F |
number
|
|
UNSIGNED_INT_10F_11F_11F_REV |
number
|
|
RGB9_E5 |
number
|
|
UNSIGNED_INT_5_9_9_9_REV |
number
|
|
TRANSFORM_FEEDBACK_BUFFER_MODE |
number
|
|
MAX_TRANSFORM_FEEDBACK_SEPARATE_COMPONENTS |
number
|
|
TRANSFORM_FEEDBACK_VARYINGS |
number
|
|
TRANSFORM_FEEDBACK_BUFFER_START |
number
|
|
TRANSFORM_FEEDBACK_BUFFER_SIZE |
number
|
|
TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN |
number
|
|
RASTERIZER_DISCARD |
number
|
|
MAX_TRANSFORM_FEEDBACK_INTERLEAVED_COMPONENTS |
number
|
|
MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS |
number
|
|
INTERLEAVED_ATTRIBS |
number
|
|
SEPARATE_ATTRIBS |
number
|
|
TRANSFORM_FEEDBACK_BUFFER |
number
|
|
TRANSFORM_FEEDBACK_BUFFER_BINDING |
number
|
|
RGBA32UI |
number
|
|
RGB32UI |
number
|
|
RGBA16UI |
number
|
|
RGB16UI |
number
|
|
RGBA8UI |
number
|
|
RGB8UI |
number
|
|
RGBA32I |
number
|
|
RGB32I |
number
|
|
RGBA16I |
number
|
|
RGB16I |
number
|
|
RGBA8I |
number
|
|
RGB8I |
number
|
|
RED_INTEGER |
number
|
|
RGB_INTEGER |
number
|
|
RGBA_INTEGER |
number
|
|
SAMPLER_2D_ARRAY |
number
|
|
SAMPLER_2D_ARRAY_SHADOW |
number
|
|
SAMPLER_CUBE_SHADOW |
number
|
|
UNSIGNED_INT_VEC2 |
number
|
|
UNSIGNED_INT_VEC3 |
number
|
|
UNSIGNED_INT_VEC4 |
number
|
|
INT_SAMPLER_2D |
number
|
|
INT_SAMPLER_3D |
number
|
|
INT_SAMPLER_CUBE |
number
|
|
INT_SAMPLER_2D_ARRAY |
number
|
|
UNSIGNED_INT_SAMPLER_2D |
number
|
|
UNSIGNED_INT_SAMPLER_3D |
number
|
|
UNSIGNED_INT_SAMPLER_CUBE |
number
|
|
UNSIGNED_INT_SAMPLER_2D_ARRAY |
number
|
|
DEPTH_COMPONENT32F |
number
|
|
DEPTH32F_STENCIL8 |
number
|
|
FLOAT_32_UNSIGNED_INT_24_8_REV |
number
|
|
FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING |
number
|
|
FRAMEBUFFER_ATTACHMENT_COMPONENT_TYPE |
number
|
|
FRAMEBUFFER_ATTACHMENT_RED_SIZE |
number
|
|
FRAMEBUFFER_ATTACHMENT_GREEN_SIZE |
number
|
|
FRAMEBUFFER_ATTACHMENT_BLUE_SIZE |
number
|
|
FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE |
number
|
|
FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE |
number
|
|
FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE |
number
|
|
FRAMEBUFFER_DEFAULT |
number
|
|
UNSIGNED_INT_24_8 |
number
|
|
DEPTH24_STENCIL8 |
number
|
|
UNSIGNED_NORMALIZED |
number
|
|
DRAW_FRAMEBUFFER_BINDING |
number
|
|
READ_FRAMEBUFFER |
number
|
|
DRAW_FRAMEBUFFER |
number
|
|
READ_FRAMEBUFFER_BINDING |
number
|
|
RENDERBUFFER_SAMPLES |
number
|
|
FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER |
number
|
|
MAX_COLOR_ATTACHMENTS |
number
|
|
COLOR_ATTACHMENT1 |
number
|
|
COLOR_ATTACHMENT2 |
number
|
|
COLOR_ATTACHMENT3 |
number
|
|
COLOR_ATTACHMENT4 |
number
|
|
COLOR_ATTACHMENT5 |
number
|
|
COLOR_ATTACHMENT6 |
number
|
|
COLOR_ATTACHMENT7 |
number
|
|
COLOR_ATTACHMENT8 |
number
|
|
COLOR_ATTACHMENT9 |
number
|
|
COLOR_ATTACHMENT10 |
number
|
|
COLOR_ATTACHMENT11 |
number
|
|
COLOR_ATTACHMENT12 |
number
|
|
COLOR_ATTACHMENT13 |
number
|
|
COLOR_ATTACHMENT14 |
number
|
|
COLOR_ATTACHMENT15 |
number
|
|
FRAMEBUFFER_INCOMPLETE_MULTISAMPLE |
number
|
|
MAX_SAMPLES |
number
|
|
HALF_FLOAT |
number
|
|
RG |
number
|
|
RG_INTEGER |
number
|
|
R8 |
number
|
|
RG8 |
number
|
|
R16F |
number
|
|
R32F |
number
|
|
RG16F |
number
|
|
RG32F |
number
|
|
R8I |
number
|
|
R8UI |
number
|
|
R16I |
number
|
|
R16UI |
number
|
|
R32I |
number
|
|
R32UI |
number
|
|
RG8I |
number
|
|
RG8UI |
number
|
|
RG16I |
number
|
|
RG16UI |
number
|
|
RG32I |
number
|
|
RG32UI |
number
|
|
VERTEX_ARRAY_BINDING |
number
|
|
R8_SNORM |
number
|
|
RG8_SNORM |
number
|
|
RGB8_SNORM |
number
|
|
RGBA8_SNORM |
number
|
|
SIGNED_NORMALIZED |
number
|
|
COPY_READ_BUFFER |
number
|
|
COPY_WRITE_BUFFER |
number
|
|
COPY_READ_BUFFER_BINDING |
number
|
|
COPY_WRITE_BUFFER_BINDING |
number
|
|
UNIFORM_BUFFER |
number
|
|
UNIFORM_BUFFER_BINDING |
number
|
|
UNIFORM_BUFFER_START |
number
|
|
UNIFORM_BUFFER_SIZE |
number
|
|
MAX_VERTEX_UNIFORM_BLOCKS |
number
|
|
MAX_FRAGMENT_UNIFORM_BLOCKS |
number
|
|
MAX_COMBINED_UNIFORM_BLOCKS |
number
|
|
MAX_UNIFORM_BUFFER_BINDINGS |
number
|
|
MAX_UNIFORM_BLOCK_SIZE |
number
|
|
MAX_COMBINED_VERTEX_UNIFORM_COMPONENTS |
number
|
|
MAX_COMBINED_FRAGMENT_UNIFORM_COMPONENTS |
number
|
|
UNIFORM_BUFFER_OFFSET_ALIGNMENT |
number
|
|
ACTIVE_UNIFORM_BLOCKS |
number
|
|
UNIFORM_TYPE |
number
|
|
UNIFORM_SIZE |
number
|
|
UNIFORM_BLOCK_INDEX |
number
|
|
UNIFORM_OFFSET |
number
|
|
UNIFORM_ARRAY_STRIDE |
number
|
|
UNIFORM_MATRIX_STRIDE |
number
|
|
UNIFORM_IS_ROW_MAJOR |
number
|
|
UNIFORM_BLOCK_BINDING |
number
|
|
UNIFORM_BLOCK_DATA_SIZE |
number
|
|
UNIFORM_BLOCK_ACTIVE_UNIFORMS |
number
|
|
UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES |
number
|
|
UNIFORM_BLOCK_REFERENCED_BY_VERTEX_SHADER |
number
|
|
UNIFORM_BLOCK_REFERENCED_BY_FRAGMENT_SHADER |
number
|
|
INVALID_INDEX |
number
|
|
MAX_VERTEX_OUTPUT_COMPONENTS |
number
|
|
MAX_FRAGMENT_INPUT_COMPONENTS |
number
|
|
MAX_SERVER_WAIT_TIMEOUT |
number
|
|
OBJECT_TYPE |
number
|
|
SYNC_CONDITION |
number
|
|
SYNC_STATUS |
number
|
|
SYNC_FLAGS |
number
|
|
SYNC_FENCE |
number
|
|
SYNC_GPU_COMMANDS_COMPLETE |
number
|
|
UNSIGNALED |
number
|
|
SIGNALED |
number
|
|
ALREADY_SIGNALED |
number
|
|
TIMEOUT_EXPIRED |
number
|
|
CONDITION_SATISFIED |
number
|
|
WAIT_FAILED |
number
|
|
SYNC_FLUSH_COMMANDS_BIT |
number
|
|
VERTEX_ATTRIB_ARRAY_DIVISOR |
number
|
|
ANY_SAMPLES_PASSED |
number
|
|
ANY_SAMPLES_PASSED_CONSERVATIVE |
number
|
|
SAMPLER_BINDING |
number
|
|
RGB10_A2UI |
number
|
|
INT_2_10_10_10_REV |
number
|
|
TRANSFORM_FEEDBACK |
number
|
|
TRANSFORM_FEEDBACK_PAUSED |
number
|
|
TRANSFORM_FEEDBACK_ACTIVE |
number
|
|
TRANSFORM_FEEDBACK_BINDING |
number
|
|
COMPRESSED_R11_EAC |
number
|
|
COMPRESSED_SIGNED_R11_EAC |
number
|
|
COMPRESSED_RG11_EAC |
number
|
|
COMPRESSED_SIGNED_RG11_EAC |
number
|
|
COMPRESSED_RGB8_ETC2 |
number
|
|
COMPRESSED_SRGB8_ETC2 |
number
|
|
COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2 |
number
|
|
COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2 |
number
|
|
COMPRESSED_RGBA8_ETC2_EAC |
number
|
|
COMPRESSED_SRGB8_ALPHA8_ETC2_EAC |
number
|
|
TEXTURE_IMMUTABLE_FORMAT |
number
|
|
MAX_ELEMENT_INDEX |
number
|
|
TEXTURE_IMMUTABLE_LEVELS |
number
|
|
MAX_TEXTURE_MAX_ANISOTROPY_EXT |
number
|
|
Winding order defines the order of vertices for a triangle to be considered front-facing.
属性:
属性名称 |
类型 |
描述信息 |
CLOCKWISE |
number
|
Vertices are in clockwise order. |
COUNTER_CLOCKWISE |
number
|
Vertices are in counter-clockwise order. |
方法
Computes the barycentric coordinates for a point with respect to a triangle.
返回值:
The modified result parameter or a new Cartesian3 instance if one was not provided. If the triangle is degenerate the function will return undefined.
使用示例:
// Returns Cartesian3.UNIT_X
const p = new Cesium.Cartesian3(-1.0, 0.0, 0.0);
const b = Cesium.barycentricCoordinates(p,
new Cesium.Cartesian3(-1.0, 0.0, 0.0),
new Cesium.Cartesian3( 1.0, 0.0, 0.0),
new Cesium.Cartesian3( 0.0, 1.0, 1.0));
Finds an item in a sorted array.
参数名称 |
类型 |
描述信息 |
array |
Array
|
The sorted array to search. |
itemToFind |
*
|
The item to find in the array. |
comparator |
binarySearchComparator
|
The function to use to compare the item to
elements in the array. |
返回值:
The index of itemToFind
in the array, if it exists. If itemToFind
does not exist, the return value is a negative number which is the bitwise complement (~)
of the index before which the itemToFind should be inserted in order to maintain the
sorted order of the array.
使用示例:
// Create a comparator function to search through an array of numbers.
function comparator(a, b) {
return a - b;
};
const numbers = [0, 2, 4, 6, 8];
const index = Cesium.binarySearch(numbers, 6, comparator); // 3
Given a relative URL under the Cesium base URL, returns an absolute URL.
参数名称 |
类型 |
描述信息 |
relativeUrl |
string
|
The relative path. |
返回值:
The absolutely URL representation of the provided path.
使用示例:
const viewer = new Cesium.Viewer("cesiumContainer", {
baseLayer: Cesium.ImageryLayer.fromProviderAsync(
Cesium.TileMapServiceImageryProvider.fromUrl(
Cesium.buildModuleUrl("Assets/Textures/NaturalEarthII"),
)),
baseLayerPicker: false,
});
Clones an object, returning a new object containing the same properties.
参数名称 |
类型 |
默认值 |
描述信息 |
object |
object
|
|
The object to clone. |
deep |
boolean
|
false
|
可选
If true, all properties will be deep cloned recursively. |
返回值:
The cloned object.
Merges two objects, copying their properties onto a new combined object. When two objects have the same
property, the value of the property on the first object is used. If either object is undefined,
it will be treated as an empty object.
参数名称 |
类型 |
默认值 |
描述信息 |
object1 |
object
|
|
可选
The first object to merge. |
object2 |
object
|
|
可选
The second object to merge. |
deep |
boolean
|
false
|
可选
Perform a recursive merge. |
返回值:
The combined object containing all properties from both objects.
使用示例:
const object1 = {
propOne : 1,
propTwo : {
value1 : 10
}
}
const object2 = {
propTwo : 2
}
const final = Cesium.combine(object1, object2);
// final === {
// propOne : 1,
// propTwo : {
// value1 : 10
// }
// }
Compute the rectangle that describes the part of the drawing buffer
that is relevant for picking.
参数名称 |
类型 |
描述信息 |
drawingBufferHeight |
number
|
The height of the drawing buffer |
position |
Cartesian2
|
The position inside the drawing buffer |
width |
number
|
undefined
|
The width of the rectangle, assumed to
be an odd integer number, default : 3.0 |
height |
number
|
undefined
|
The height of the rectangle. If unspecified,
height will default to the value of width |
result |
BoundingRectangle
|
The result rectangle |
返回值:
The result rectangle
Creates an `AnchorPointDirect` from the given JSON representation
参数名称 |
类型 |
描述信息 |
anchorPointDirectJson |
object
|
The input JSON |
返回值:
The direct anchor point
Creates an `AnchorPointIndirect` from the given JSON representation
参数名称 |
类型 |
描述信息 |
anchorPointIndirectJson |
object
|
The input JSON |
返回值:
The indirect anchor point
Create a Command from a given function, for use with ViewModels.
A Command is a function with an extra canExecute
observable property to determine
whether the command can be executed. When executed, a Command function will check the
value of canExecute
and throw if false. It also provides events for when
a command has been or is about to be executed.
参数名称 |
类型 |
默认值 |
描述信息 |
func |
function
|
|
The function to execute. |
canExecute |
boolean
|
true
|
可选
A boolean indicating whether the function can currently be executed. |
Creates a `CorrelationGroup` from the given JSON representation
参数名称 |
类型 |
描述信息 |
correlationGroupJson |
object
|
The input JSON |
返回值:
The correlation group
Creates a Matrix3 that describes a covariance matrix (which is
symmetric) from the array containing the upper triangle, in
column-major order.
参数名称 |
类型 |
描述信息 |
array |
Array.<number>
|
The input array |
返回值:
The Matrix3
Creates a
Material
that combines multiple layers of color/gradient bands and maps them to terrain heights.
The shader does a binary search over all the heights to find out which colors are above and below a given height, and
interpolates between them for the final color. This material supports hundreds of entries relatively cheaply.
参数名称 |
类型 |
描述信息 |
options |
object
|
Object with the following properties:
参数名称 |
类型 |
描述信息 |
scene |
Scene
|
The scene where the visualization is taking place. |
layers |
Array.<createElevationBandMaterialBand>
|
A list of bands ordered from lowest to highest precedence. |
|
返回值:
使用示例:
scene.globe.material = Cesium.createElevationBandMaterial({
scene : scene,
layers : [{
entries : [{
height : 4200.0,
color : new Cesium.Color(0.0, 0.0, 0.0, 1.0)
}, {
height : 8848.0,
color : new Cesium.Color(1.0, 1.0, 1.0, 1.0)
}],
extendDownwards : true,
extendUpwards : true,
}, {
entries : [{
height : 7000.0,
color : new Cesium.Color(1.0, 0.0, 0.0, 0.5)
}, {
height : 7100.0,
color : new Cesium.Color(1.0, 0.0, 0.0, 0.5)
}]
}]
});
Demo:
Creates a
Cesium3DTileset
instance for the Google Photorealistic 3D
Tiles tileset.
Google Photorealistic 3D Tiles can only be used with the Google geocoder. To
confirm that you are aware of this restriction pass
`usingOnlyWithGoogleGeocoder: true` to the apiOptions. Otherwise a one time
warning will be displayed when this function is called.
返回值:
使用示例s:
const viewer = new Cesium.Viewer("cesiumContainer", {
geocoder: Cesium.IonGeocodeProviderType.GOOGLE
});
try {
const tileset = await Cesium.createGooglePhotorealistic3DTileset({
onlyUsingWithGoogleGeocoder: true,
});
viewer.scene.primitives.add(tileset));
} catch (error) {
console.log(`Error creating tileset: ${error}`);
}
// Use your own Google Maps API key
Cesium.GoogleMaps.defaultApiKey = "your-api-key";
const viewer = new Cesium.Viewer("cesiumContainer". {
geocoder: Cesium.IonGeocodeProviderType.GOOGLE
});
try {
const tileset = await Cesium.createGooglePhotorealistic3DTileset({
onlyUsingWithGoogleGeocoder: true,
});
viewer.scene.primitives.add(tileset));
} catch (error) {
console.log(`Error creating tileset: ${error}`);
}
参考:
Creates a Globally unique identifier (GUID) string. A GUID is 128 bits long, and can guarantee uniqueness across space and time.
返回值:
使用示例:
this.guid = Cesium.createGuid();
参考:
参数名称 |
类型 |
描述信息 |
options |
object
|
可选
Construction options. Any options allowed by the Cesium3DTileset constructor
may be specified here. In addition to those, the following properties are supported:
参数名称 |
类型 |
默认值 |
描述信息 |
defaultColor |
Color
|
Color.WHITE
|
可选
The default color to use for buildings
that do not have a color. This parameter is ignored if options.style is specified. |
style |
Cesium3DTileStyle
|
|
可选
The style to use with the tileset. If not
specified, a default style is used which gives each building or building part a
color inferred from its OpenStreetMap tags . If no color can be inferred,
options.defaultColor is used. |
enableShowOutline |
boolean
|
true
|
可选
If true, enable rendering outlines. This can be set to false to avoid the additional processing of geometry at load time. |
showOutline |
boolean
|
true
|
可选
Whether to show outlines around buildings. When true,
outlines are displayed. When false, outlines are not displayed. |
|
返回值:
使用示例s:
// Create Cesium OSM Buildings with default styling
const viewer = new Cesium.Viewer("cesiumContainer");
try {
const tileset = await Cesium.createOsmBuildingsAsync();
viewer.scene.primitives.add(tileset));
} catch (error) {
console.log(`Error creating tileset: ${error}`);
}
// Create Cesium OSM Buildings with a custom style highlighting
// schools and hospitals.
const viewer = new Cesium.Viewer("cesiumContainer");
try {
const tileset = await Cesium.createOsmBuildingsAsync({
style: new Cesium.Cesium3DTileStyle({
color: {
conditions: [
["${feature['building']} === 'hospital'", "color('#0000FF')"],
["${feature['building']} === 'school'", "color('#00FF00')"],
[true, "color('#ffffff')"]
]
}
})
});
viewer.scene.primitives.add(tileset));
} catch (error) {
console.log(`Error creating tileset: ${error}`);
}
参考:
Creates a
Primitive
to visualize well-known vector vertex attributes:
normal
,
tangent
, and
bitangent
. Normal
is red; tangent is green; and bitangent is blue. If an attribute is not
present, it is not drawn.
参数名称 |
类型 |
描述信息 |
options |
object
|
Object with the following properties:
参数名称 |
类型 |
默认值 |
描述信息 |
geometry |
Geometry
|
|
The Geometry instance with the attribute. |
length |
number
|
10000.0
|
可选
The length of each line segment in meters. This can be negative to point the vector in the opposite direction. |
modelMatrix |
Matrix4
|
Matrix4.IDENTITY
|
可选
The model matrix that transforms to transform the geometry from model to world coordinates. |
|
返回值:
A new Primitive
instance with geometry for the vectors.
使用示例:
scene.primitives.add(Cesium.createTangentSpaceDebugPrimitive({
geometry : instance.geometry,
length : 100000.0,
modelMatrix : instance.modelMatrix
}));
参数名称 |
类型 |
描述信息 |
options |
Object
|
可选
Object with the following properties:
参数名称 |
类型 |
默认值 |
描述信息 |
requestVertexNormals |
Boolean
|
false
|
可选
Flag that indicates if the client should request additional lighting information from the server if available. |
|
返回值:
A promise that resolves to the created CesiumTerrainProvider
使用示例s:
// Create Cesium World Bathymetry with default settings
try {
const viewer = new Cesium.Viewer("cesiumContainer", {
terrainProvider: await Cesium.createWorldBathymetryAsync();
});
} catch (error) {
console.log(error);
}
// Create Cesium World Bathymetry with normals.
try {
const viewer1 = new Cesium.Viewer("cesiumContainer", {
terrainProvider: await Cesium.createWorldBathymetryAsync({
requestVertexNormals: true
});
});
} catch (error) {
console.log(error);
}
参考:
Creates an
IonImageryProvider
instance for ion's default global base imagery layer, currently Bing Maps.
参数名称 |
类型 |
描述信息 |
options |
Object
|
可选
Object with the following properties:
参数名称 |
类型 |
默认值 |
描述信息 |
style |
IonWorldImageryStyle
|
IonWorldImageryStyle
|
可选
The style of base imagery, only AERIAL, AERIAL_WITH_LABELS, and ROAD are currently supported. |
|
返回值:
使用示例s:
// Create a Cesium World Imagery base layer with default settings
try {
const imageryProvider = await Cesium.createWorldImageryAsync();
} catch (error) {
console.log(`There was an error creating world imagery: ${error}`);
}
// Create Cesium World Imagery with different style
try {
const imageryProvider = await Cesium.createWorldImageryAsync({
style: Cesium.IonWorldImageryStyle.AERIAL_WITH_LABELS
});
} catch (error) {
console.log(`There was an error creating world imagery: ${error}`);
}
参考:
参数名称 |
类型 |
描述信息 |
options |
Object
|
可选
Object with the following properties:
参数名称 |
类型 |
默认值 |
描述信息 |
requestVertexNormals |
Boolean
|
false
|
可选
Flag that indicates if the client should request additional lighting information from the server if available. |
requestWaterMask |
Boolean
|
false
|
可选
Flag that indicates if the client should request per tile water masks from the server if available. |
|
返回值:
A promise that resolves to the created CesiumTerrainProvider
使用示例s:
// Create Cesium World Terrain with default settings
try {
const viewer = new Cesium.Viewer("cesiumContainer", {
terrainProvider: await Cesium.createWorldTerrainAsync();
});
} catch (error) {
console.log(error);
}
// Create Cesium World Terrain with water and normals.
try {
const viewer1 = new Cesium.Viewer("cesiumContainer", {
terrainProvider: await Cesium.createWorldTerrainAsync({
requestWaterMask: true,
requestVertexNormals: true
});
});
} catch (error) {
console.log(error);
}
参考:
Returns the first parameter if not undefined, otherwise the second parameter.
Useful for setting a default value for a parameter.
返回值:
Returns the first parameter if not undefined, otherwise the second parameter.
使用示例:
param = Cesium.defaultValue(param, 'default');
参数名称 |
类型 |
描述信息 |
value |
*
|
The object. |
返回值:
Returns true if the object is defined, returns false otherwise.
使用示例:
if (Cesium.defined(positions)) {
doSomething();
} else {
doSomethingElse();
}
Destroys an object. Each of the object's functions, including functions in its prototype,
is replaced with a function that throws a
DeveloperError
, except for the object's
isDestroyed
function, which is set to a function that returns
true
.
The object's properties are removed with
delete
.
This function is used by objects that hold native resources, e.g., WebGL resources, which
need to be explicitly released. Client code calls an object's
destroy
function,
which then releases the native resource and calls
destroyObject
to put itself
in a destroyed state.
参数名称 |
类型 |
描述信息 |
object |
object
|
The object to destroy. |
message |
string
|
可选
The message to include in the exception that is thrown if
a destroyed object's function is called. |
使用示例:
// How a texture would destroy itself.
this.destroy = function () {
_gl.deleteTexture(_texture);
return Cesium.destroyObject(this);
};
参考:
Exports an EntityCollection as a KML document. Only Point, Billboard, Model, Path, Polygon, Polyline geometries
will be exported. Note that there is not a 1 to 1 mapping of Entity properties to KML Feature properties. For
example, entity properties that are time dynamic but cannot be dynamic in KML are exported with their values at
options.time or the beginning of the EntityCollection's time interval if not specified. For time-dynamic properties
that are supported in KML, we use the samples if it is a
SampledProperty
otherwise we sample the value using
the options.sampleDuration. Point, Billboard, Model and Path geometries with time-dynamic positions will be exported
as gx:Track Features. Not all Materials are representable in KML, so for more advanced Materials just the primary
color is used. Canvas objects are exported as PNG images.
参数名称 |
类型 |
描述信息 |
options |
object
|
An object with the following properties:
参数名称 |
类型 |
默认值 |
描述信息 |
entities |
EntityCollection
|
|
The EntityCollection to export as KML. |
ellipsoid |
Ellipsoid
|
Ellipsoid.default
|
可选
The ellipsoid for the output file. |
modelCallback |
exportKmlModelCallback
|
|
可选
A callback that will be called with a ModelGraphics instance and should return the URI to use in the KML. Required if a model exists in the entity collection. |
time |
JulianDate
|
entities.computeAvailability().start
|
可选
The time value to use to get properties that are not time varying in KML. |
defaultAvailability |
TimeInterval
|
entities.computeAvailability()
|
可选
The interval that will be sampled if an entity doesn't have an availability. |
sampleDuration |
number
|
60
|
可选
The number of seconds to sample properties that are varying in KML. |
kmz |
boolean
|
false
|
可选
If true KML and external files will be compressed into a kmz file. |
|
返回值:
A promise that resolved to an object containing the KML string and a dictionary of external file blobs, or a kmz file as a blob if options.kmz is true.
使用示例:
Cesium.exportKml({
entities: entityCollection
})
.then(function(result) {
// The XML string is in result.kml
const externalFiles = result.externalFiles
for(const file in externalFiles) {
// file is the name of the file used in the KML document as the href
// externalFiles[file] is a blob with the contents of the file
}
});
Demo:
Formats an error object into a String. If available, uses name, message, and stack
properties, otherwise, falls back on toString().
参数名称 |
类型 |
描述信息 |
object |
*
|
The item to find in the array. |
返回值:
A string containing the formatted error.
Given a relative Uri and a base Uri, returns the absolute Uri of the relative Uri.
参数名称 |
类型 |
描述信息 |
relative |
string
|
The relative Uri. |
base |
string
|
可选
The base Uri. |
返回值:
The absolute Uri of the given relative Uri.
使用示例:
//absolute Uri will be "https://test.com/awesome.png";
const absoluteUri = Cesium.getAbsoluteUri('awesome.png', 'https://test.com');
Given a URI, returns the base path of the URI.
参数名称 |
类型 |
默认值 |
描述信息 |
uri |
string
|
|
The Uri. |
includeQuery |
boolean
|
false
|
可选
Whether or not to include the query string and fragment form the uri |
返回值:
The base path of the Uri.
使用示例:
// basePath will be "/Gallery/";
const basePath = Cesium.getBaseUri('/Gallery/simple.czml?value=true&example=false');
// basePath will be "/Gallery/?value=true&example=false";
const basePath = Cesium.getBaseUri('/Gallery/simple.czml?value=true&example=false', true);
Given a URI, returns the extension of the URI.
参数名称 |
类型 |
描述信息 |
uri |
string
|
The Uri. |
返回值:
The extension of the Uri.
使用示例:
//extension will be "czml";
const extension = Cesium.getExtensionFromUri('/Gallery/simple.czml?value=true&example=false');
Given a URI, returns the last segment of the URI, removing any path or query information.
参数名称 |
类型 |
描述信息 |
uri |
string
|
The Uri. |
返回值:
The last segment of the Uri.
使用示例:
//fileName will be"simple.czml";
const fileName = Cesium.getFilenameFromUri('/Gallery/simple.czml?value=true&example=false');
Returns the type that the given class property has in a GLSL shader.
It returns the same string as `PropertyTextureProperty.prototype.getGlslType`
for a property texture property with the given class property
返回值:
The GLSL shader type string for the property
Extract a pixel array from a loaded image. Draws the image
into a canvas so it can read the pixels back.
参数名称 |
类型 |
描述信息 |
image |
HTMLImageElement
|
ImageBitmap
|
The image to extract pixels from. |
width |
number
|
The width of the image. If not defined, then image.width is assigned. |
height |
number
|
The height of the image. If not defined, then image.height is assigned. |
返回值:
The pixels of the image.
getSourceValueStringComponent(classProperty, metadataProperty, componentName) → string
Creates a shader statement that returns the value of the specified
component of the given property, normalized to the range [0, 1].
参数名称 |
类型 |
描述信息 |
classProperty |
MetadataClassProperty
|
The class property |
metadataProperty |
object
|
The metadata property, either
a `PropertyTextureProperty` or a `PropertyAttributeProperty` |
componentName |
string
|
The name, in ["x", "y", "z", "w"] |
返回值:
The string
Creates a shader statement that returns the value of the specified
property, normalized to the range [0, 1].
参数名称 |
类型 |
描述信息 |
classProperty |
MetadataClassProperty
|
The class property |
metadataProperty |
object
|
The metadata property, either
a `PropertyTextureProperty` or a `PropertyAttributeProperty` |
返回值:
The string
Gets a timestamp that can be used in measuring the time between events. Timestamps
are expressed in milliseconds, but it is not specified what the milliseconds are
measured from. This function uses performance.now() if it is available, or Date.now()
otherwise.
返回值:
The timestamp in milliseconds since some unspecified reference time.
Determines if a given date is a leap year.
参数名称 |
类型 |
描述信息 |
year |
number
|
The year to be tested. |
返回值:
True if year
is a leap year.
使用示例:
const leapYear = Cesium.isLeapYear(2000); // true
Loads the gltf object
A stable merge sort.
参数名称 |
类型 |
描述信息 |
array |
Array
|
The array to sort. |
comparator |
mergeSortComparator
|
The function to use to compare elements in the array. |
userDefinedObject |
*
|
可选
Any item to pass as the third parameter to comparator . |
使用示例:
// Assume array contains BoundingSpheres in world coordinates.
// Sort them in ascending order of distance from the camera.
const position = camera.positionWC;
Cesium.mergeSort(array, function(a, b, position) {
return Cesium.BoundingSphere.distanceSquaredTo(b, position) - Cesium.BoundingSphere.distanceSquaredTo(a, position);
}, position);
Converts an object representing a set of name/value pairs into a query string,
with names and values encoded properly for use in a URL. Values that are arrays
will produce multiple values with the same name.
参数名称 |
类型 |
描述信息 |
obj |
object
|
The object containing data to encode. |
返回值:
An encoded query string.
使用示例:
const str = Cesium.objectToQuery({
key1 : 'some value',
key2 : 'a/b',
key3 : ['x', 'y']
});
参考:
- queryToObject
// str will be:
// 'key1=some%20value&key2=a%2Fb&key3=x&key3=y'
Determine how translucent surfaces will be handled.
When OIT is enabled, then this will delegate to OIT.executeCommands.
Otherwise, it will just be executeTranslucentCommandsBackToFront
for render passes, or executeTranslucentCommandsFrontToBack for
other passes.
参数名称 |
类型 |
描述信息 |
scene |
Scene
|
The scene. |
返回值:
A function to execute translucent commands.
Determines if a point is inside a triangle.
返回值:
true
if the point is inside the triangle; otherwise, false
.
使用示例:
// Returns true
const p = new Cesium.Cartesian2(0.25, 0.25);
const b = Cesium.pointInsideTriangle(p,
new Cesium.Cartesian2(0.0, 0.0),
new Cesium.Cartesian2(1.0, 0.0),
new Cesium.Cartesian2(0.0, 1.0));
Parses a query string into an object, where the keys and values of the object are the
name/value pairs from the query string, decoded. If a name appears multiple times,
the value in the object will be an array of values.
参数名称 |
类型 |
描述信息 |
queryString |
string
|
The query string. |
返回值:
An object containing the parameters parsed from the query string.
使用示例:
const obj = Cesium.queryToObject('key1=some%20value&key2=a%2Fb&key3=x&key3=y');
// obj will be:
// {
// key1 : 'some value',
// key2 : 'a/b',
// key3 : ['x', 'y']
// }
参考:
Removes an extension from gltf.extensions, gltf.extensionsUsed, gltf.extensionsRequired, and any other objects in the glTF if it is present.
参数名称 |
类型 |
描述信息 |
gltf |
object
|
A javascript object containing a glTF asset. |
extension |
string
|
The extension to remove. |
返回值:
The extension data removed from gltf.extensions.
Initiates a terrain height query for an array of
Cartographic
positions by
requesting tiles from a terrain provider, sampling, and interpolating. The interpolation
matches the triangles used to render the terrain at the specified level. The query
happens asynchronously, so this function returns a promise that is resolved when
the query completes. Each point height is modified in place. If a height can not be
determined because no terrain data is available for the specified level at that location,
or another error occurs, the height is set to undefined. As is typical of the
Cartographic
type, the supplied height is a height above the reference ellipsoid
(such as
Ellipsoid.WGS84
) rather than an altitude above mean sea level. In other
words, it will not necessarily be 0.0 if sampled in the ocean. This function needs the
terrain level of detail as input, if you need to get the altitude of the terrain as precisely
as possible (i.e. with maximum level of detail) use
sampleTerrainMostDetailed
.
参数名称 |
类型 |
默认值 |
描述信息 |
terrainProvider |
TerrainProvider
|
|
The terrain provider from which to query heights. |
level |
number
|
|
The terrain level-of-detail from which to query terrain heights. |
positions |
Array.<Cartographic>
|
|
The positions to update with terrain heights. |
rejectOnTileFail |
boolean
|
false
|
可选
If true, for any failed terrain tile requests, the promise will be rejected. If false, returned heights will be undefined. |
返回值:
A promise that resolves to the provided list of positions when terrain the query has completed.
使用示例:
// Query the terrain height of two Cartographic positions
const terrainProvider = await Cesium.createWorldTerrainAsync();
const positions = [
Cesium.Cartographic.fromDegrees(86.925145, 27.988257),
Cesium.Cartographic.fromDegrees(87.0, 28.0)
];
const updatedPositions = await Cesium.sampleTerrain(terrainProvider, 11, positions);
// positions[0].height and positions[1].height have been updated.
// updatedPositions is just a reference to positions.
// To handle tile errors, pass true for the rejectOnTileFail parameter.
try {
const updatedPositions = await Cesium.sampleTerrain(terrainProvider, 11, positions, true);
} catch (error) {
// A tile request error occurred.
}
参考:
Initiates a sampleTerrain() request at the maximum available tile level for a terrain dataset.
参数名称 |
类型 |
默认值 |
描述信息 |
terrainProvider |
TerrainProvider
|
|
The terrain provider from which to query heights. |
positions |
Array.<Cartographic>
|
|
The positions to update with terrain heights. |
rejectOnTileFail |
boolean
|
false
|
可选
If true, for a failed terrain tile request the promise will be rejected. If false, returned heights will be undefined. |
返回值:
A promise that resolves to the provided list of positions when terrain the query has completed. This
promise will reject if the terrain provider's `availability` property is undefined.
使用示例:
// Query the terrain height of two Cartographic positions
const terrainProvider = await Cesium.createWorldTerrainAsync();
const positions = [
Cesium.Cartographic.fromDegrees(86.925145, 27.988257),
Cesium.Cartographic.fromDegrees(87.0, 28.0)
];
const updatedPositions = await Cesium.sampleTerrainMostDetailed(terrainProvider, positions);
// positions[0].height and positions[1].height have been updated.
// updatedPositions is just a reference to positions.
// To handle tile errors, pass true for the rejectOnTileFail parameter.
try {
const updatedPositions = await Cesium.sampleTerrainMostDetailed(terrainProvider, positions, true);
} catch (error) {
// A tile request error occurred.
}
Converts the value from sRGB color space to linear color space.
参数名称 |
类型 |
描述信息 |
value |
number
|
The color value in sRGB color space. |
返回值:
Returns the color value in linear color space.
使用示例:
const srgbColor = [0.5, 0.5, 0.5];
const linearColor = srgbColor.map(function (c) {
return Cesium.srgbToLinear(c);
});
Represents a point in stereographic coordinates, which can be obtained by projecting a cartesian coordinate from one pole onto a tangent plane at the other pole.
The stereographic projection faithfully represents the relative directions of all great circles passing through its center point.
To faithfully represents angles everywhere, this is a conformal projection, which means points are projected onto an arbrary sphere.
参数名称 |
类型 |
描述信息 |
position |
Cartesian2
|
可选
The steroegraphic coordinates. |
tangentPlane |
EllipseGeometry
|
可选
The tangent plane onto which the point was projected. |
Subdivides an array into a number of smaller, equal sized arrays.
参数名称 |
类型 |
描述信息 |
array |
Array
|
The array to divide. |
numberOfArrays |
number
|
The number of arrays to divide the provided array into. |
Throws:
Returns a shader statement that applies the inverse of the
value transform to the given value, based on the given offset
and scale.
参数名称 |
类型 |
描述信息 |
input |
string
|
The input value |
offset |
string
|
The offset |
scale |
string
|
The scale |
返回值:
The statement
Returns a shader statement that applies the inverse of the
normalization, based on the given component type
参数名称 |
类型 |
描述信息 |
input |
string
|
The input value |
componentType |
string
|
The component type |
返回值:
The statement
A mixin which adds the
Cesium3DTilesInspector
widget to the
Viewer
widget.
Rather than being called directly, this function is normally passed as
a parameter to
Viewer#extend
, as shown in the example below.
参数名称 |
类型 |
描述信息 |
viewer |
Viewer
|
The viewer instance. |
使用示例:
const viewer = new Cesium.Viewer('cesiumContainer');
viewer.extend(Cesium.viewerCesium3DTilesInspectorMixin);
A mixin which adds the CesiumInspector widget to the Viewer widget.
Rather than being called directly, this function is normally passed as
a parameter to
Viewer#extend
, as shown in the example below.
参数名称 |
类型 |
描述信息 |
viewer |
Viewer
|
The viewer instance. |
Throws:
使用示例:
const viewer = new Cesium.Viewer('cesiumContainer');
viewer.extend(Cesium.viewerCesiumInspectorMixin);
Demo:
A mixin which adds default drag and drop support for CZML files to the Viewer widget.
Rather than being called directly, this function is normally passed as
a parameter to
Viewer#extend
, as shown in the example below.
参数名称 |
类型 |
描述信息 |
viewer |
Viewer
|
The viewer instance. |
options |
object
|
可选
Object with the following properties:
参数名称 |
类型 |
默认值 |
描述信息 |
dropTarget |
Element
|
string
|
viewer.container
|
可选
The DOM element which will serve as the drop target. |
clearOnDrop |
boolean
|
true
|
可选
When true, dropping files will clear all existing data sources first, when false, new data sources will be loaded after the existing ones. |
flyToOnDrop |
boolean
|
true
|
可选
When true, dropping files will fly to the data source once it is loaded. |
clampToGround |
boolean
|
true
|
可选
When true, datasources are clamped to the ground. |
proxy |
Proxy
|
|
可选
The proxy to be used for KML network links. |
|
Throws:
使用示例:
// Add basic drag and drop support and pop up an alert window on error.
const viewer = new Cesium.Viewer('cesiumContainer');
viewer.extend(Cesium.viewerDragDropMixin);
viewer.dropError.addEventListener(function(viewerArg, source, error) {
window.alert('Error processing ' + source + ':' + error);
});
A mixin which adds the
PerformanceWatchdog
widget to the
Viewer
widget.
Rather than being called directly, this function is normally passed as
a parameter to
Viewer#extend
, as shown in the example below.
参数名称 |
类型 |
描述信息 |
viewer |
Viewer
|
The viewer instance. |
options |
object
|
可选
An object with properties.
参数名称 |
类型 |
默认值 |
描述信息 |
lowFrameRateMessage |
string
|
'This application appears to be performing poorly on your system. Please try using a different web browser or updating your video drivers.'
|
可选
The
message to display when a low frame rate is detected. The message is interpeted as HTML, so make sure
it comes from a trusted source so that your application is not vulnerable to cross-site scripting attacks. |
|
Throws:
使用示例:
const viewer = new Cesium.Viewer('cesiumContainer');
viewer.extend(Cesium.viewerPerformanceWatchdogMixin, {
lowFrameRateMessage : 'Why is this going so <em>slowly</em>?'
});
A mixin which adds the
VoxelInspector
widget to the
Viewer
widget.
Rather than being called directly, this function is normally passed as
a parameter to
Viewer#extend
, as shown in the example below.
参数名称 |
类型 |
描述信息 |
viewer |
Viewer
|
The viewer instance. |
使用示例:
var viewer = new Cesium.Viewer('cesiumContainer');
viewer.extend(Cesium.viewerVoxelInspectorMixin);
Writes the given text into a new canvas. The canvas will be sized to fit the text.
If text is blank, returns undefined.
参数名称 |
类型 |
描述信息 |
text |
string
|
The text to write. |
options |
object
|
可选
Object with the following properties:
参数名称 |
类型 |
默认值 |
描述信息 |
font |
string
|
'10px sans-serif'
|
可选
The CSS font to use. |
textBaseline |
string
|
'bottom'
|
可选
The baseline of the text. |
fill |
boolean
|
true
|
可选
Whether to fill the text. |
stroke |
boolean
|
false
|
可选
Whether to stroke the text. |
fillColor |
Color
|
Color.WHITE
|
可选
The fill color. |
strokeColor |
Color
|
Color.BLACK
|
可选
The stroke color. |
strokeWidth |
number
|
1
|
可选
The stroke width. |
backgroundColor |
Color
|
Color.TRANSPARENT
|
可选
The background color of the canvas. |
padding |
number
|
0
|
可选
The pixel size of the padding to add around the text. |
|
返回值:
A new canvas with the given text drawn into it. The dimensions object
from measureText will also be added to the returned canvas. If text is
blank, returns undefined.
定义的类型
A function used to compare two items while performing a binary search.
参数名称 |
类型 |
描述信息 |
a |
*
|
An item in the array. |
b |
*
|
The item being searched for. |
返回值:
Returns a negative value if a
is less than b
,
a positive value if a
is greater than b
, or
0 if a
is equal to b
.
使用示例:
function compareNumbers(a, b) {
return a - b;
}
Options to control the setting up of a WebGL Context.
allowTextureFilterAnisotropic
defaults to true, which enables
anisotropic texture filtering when the WebGL extension is supported.
Setting this to false will improve performance, but hurt visual quality,
especially for horizon views.
属性:
属性名称 |
类型 |
可选 |
默认值 |
描述信息 |
requestWebgl1 |
boolean
|
<可选>
|
false
|
If true and the browser supports it, use a WebGL 1 rendering context |
allowTextureFilterAnisotropic |
boolean
|
<可选>
|
true
|
If true, use anisotropic filtering during texture sampling |
webgl |
WebGLOptions
|
<可选>
|
|
WebGL options to be passed on to canvas.getContext |
getWebGLStub |
function
|
<可选>
|
|
A function to create a WebGL stub for testing |
属性:
属性名称 |
类型 |
可选 |
默认值 |
描述信息 |
entries |
Array.<createElevationBandMaterialEntry>
|
|
|
A list of elevation entries. They will automatically be sorted from lowest to highest. If there is only one entry and extendsDownards and extendUpwards are both false , they will both be set to true . |
extendDownwards |
boolean
|
<可选>
|
false
|
If true , the band's minimum elevation color will extend infinitely downwards. |
extendUpwards |
boolean
|
<可选>
|
false
|
If true , the band's maximum elevation color will extend infinitely upwards. |
属性:
属性名称 |
类型 |
描述信息 |
height |
number
|
The height. |
color |
Color
|
The color at this height. |
An orientation given by a pair of unit vectors
属性:
Since KML does not support glTF models, this callback is required to specify what URL to use for the model in the KML document.
It can also be used to add additional files to the externalFiles
object, which is the list of files embedded in the exported KMZ,
or otherwise returned with the KML string when exporting.
参数名称 |
类型 |
描述信息 |
model |
ModelGraphics
|
The ModelGraphics instance for an Entity. |
time |
JulianDate
|
The time that any properties should use to get the value. |
externalFiles |
object
|
An object that maps a filename to a Blob or a Promise that resolves to a Blob. |
返回值:
The URL to use for the href in the KML document.
属性:
属性名称 |
类型 |
描述信息 |
kml |
string
|
The generated KML. |
externalFiles |
Object.<string, Blob>
|
An object dictionary of external files |
属性:
属性名称 |
类型 |
描述信息 |
kmz |
Blob
|
The generated kmz file. |
An orientation given by numeric heading, pitch, and roll
属性:
属性名称 |
类型 |
可选 |
默认值 |
描述信息 |
heading |
number
|
<可选>
|
0.0
|
The heading in radians |
pitch |
number
|
<可选>
|
-CesiumMath.PI_OVER_TWO
|
The pitch in radians |
roll |
number
|
<可选>
|
0.0
|
The roll in radians |
The format in which
ImageryProvider
methods return an image may
vary by provider, configuration, or server settings. Most common are
HTMLImageElement
,
HTMLCanvasElement
, or on supported
browsers,
ImageBitmap
.
See the documentation for each ImageryProvider class for more information about how they return images.
A function used to compare two items while performing a merge sort.
参数名称 |
类型 |
描述信息 |
a |
*
|
An item in the array. |
b |
*
|
An item in the array. |
userDefinedObject |
*
|
可选
An object that was passed to mergeSort . |
返回值:
Returns a negative value if a
is less than b
,
a positive value if a
is greater than b
, or
0 if a
is equal to b
.
使用示例:
function compareNumbers(a, b, userDefinedObject) {
return a - b;
}
An instance of a metadata value.
This can be one of the following types:
number
for type SCALAR
and numeric component types except for INT64
or UINT64
bigint
for type SCALAR
and component type INT64
or UINT64
string
for type STRING
or ENUM
boolean
for type BOOLEAN
Cartesian2
for type VEC2
Cartesian3
for type VEC3
Cartesian4
for type VEC4
Matrix2
for type MAT2
Matrix3
for type MAT3
Matrix4
for type MAT4
- Arrays of these types when the metadata value is an array
Information about metadata that is supposed to be picked
属性:
属性名称 |
类型 |
描述信息 |
schemaId |
string
|
undefined
|
The optional ID of the metadata schema |
className |
string
|
The name of the metadata class |
propertyName |
string
|
The name of the metadata property |
classProperty |
MetadataClassProperty
|
The metadata class property |
An object describing a uniform, its type, and an initial value
属性:
Experimental
This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.
WebGL options to be passed on to HTMLCanvasElement.getContext().
See
WebGLContextAttributes
but note the modified defaults for 'alpha', 'stencil', and 'powerPreference'
alpha
defaults to false, which can improve performance
compared to the standard WebGL default of true. If an application needs
to composite Cesium above other HTML elements using alpha-blending, set
alpha
to true.
属性:
属性名称 |
类型 |
可选 |
默认值 |
描述信息 |
alpha |
boolean
|
<可选>
|
false
|
|
depth |
boolean
|
<可选>
|
true
|
|
stencil |
boolean
|
<可选>
|
false
|
|
antialias |
boolean
|
<可选>
|
true
|
|
premultipliedAlpha |
boolean
|
<可选>
|
true
|
|
preserveDrawingBuffer |
boolean
|
<可选>
|
false
|
|
powerPreference |
"default"
|
"low-power"
|
"high-performance"
|
<可选>
|
"high-performance"
|
|
failIfMajorPerformanceCaveat |
boolean
|
<可选>
|
false
|
|