BillboardGraphics

查阅Mars3D API

new Cesium.BillboardGraphics(options)

engine/Source/DataSources/BillboardGraphics.js 50

Describes a two dimensional icon located at the position of the containing Entity.

Example billboards

参数名称	类型	描述信息
options	BillboardGraphics.ConstructorOptions	可选 Object describing initialization options

Demo:

• Cesium Sandcastle Billboard Demo

成员(属性)

默认值: Cartesian3.ZERO

Gets or sets the Property specifying the Color that is multiplied with the image. This has two common use cases. First, the same white texture may be used by many different billboards, each with a different color, to create colored billboards. Second, the color's alpha component can be used to make the billboard translucent as shown below. An alpha of 0.0 makes the billboard transparent, and 1.0 makes the billboard opaque.

default

alpha : 0.5

默认值: Color.WHITE

Gets or sets the Cartesian3 Property specifying the billboard's offset in eye coordinates. Eye coordinates is a left-handed coordinate system, where x points towards the viewer's right, y points up, and z points into the screen.

An eye offset is commonly used to arrange multiple billboards or objects at the same position, e.g., to arrange a billboard above its corresponding 3D model.

Below, the billboard is positioned at the center of the Earth but an eye offset makes it always appear on top of the Earth regardless of the viewer's or Earth's orientation.

b.eyeOffset = new Cartesian3(0.0, 8000000.0, 0.0);

默认值: Cartesian3.ZERO

默认值: HeightReference.NONE

默认值: HorizontalOrigin.CENTER

Gets or sets the Cartesian2 Property specifying the billboard's pixel offset in screen space from the origin of this billboard. This is commonly used to align multiple billboards and labels at the same position, e.g., an image and text. The screen space origin is the top, left corner of the canvas; x increases from left to right, and y increases from top to bottom.

default

b.pixeloffset = new Cartesian2(50, 25);

The billboard's origin is indicated by the yellow point.

默认值: Cartesian2.ZERO

默认值: 0

Gets or sets the numeric Property specifying the uniform scale to apply to the image. A scale greater than 1.0 enlarges the billboard while a scale less than 1.0 shrinks it.

From left to right in the above image, the scales are 0.5, 1.0, and 2.0.

默认值: 1.0

默认值: true

默认值: false

默认值: VerticalOrigin.CENTER

方法

返回值:

定义的类型

属性:

属性名称	类型	可选	默认值	描述信息
show	Property | boolean	<可选>	true	A boolean Property specifying the visibility of the billboard.
image	Property | string | HTMLCanvasElement	<可选>		A Property specifying the Image, URI, or Canvas to use for the billboard.
scale	Property | number	<可选>	1.0	A numeric Property specifying the scale to apply to the image size.
pixelOffset	Property | Cartesian2	<可选>	Cartesian2.ZERO	A Cartesian2 Property specifying the pixel offset.
eyeOffset	Property | Cartesian3	<可选>	Cartesian3.ZERO	A Cartesian3 Property specifying the eye offset.
horizontalOrigin	Property | HorizontalOrigin	<可选>	HorizontalOrigin.CENTER	A Property specifying the HorizontalOrigin.
verticalOrigin	Property | VerticalOrigin	<可选>	VerticalOrigin.CENTER	A Property specifying the VerticalOrigin.
heightReference	Property | HeightReference	<可选>	HeightReference.NONE	A Property specifying what the height is relative to.
color	Property | Color	<可选>	Color.WHITE	A Property specifying the tint Color of the image.
rotation	Property | number	<可选>	0	A numeric Property specifying the rotation about the alignedAxis.
alignedAxis	Property | Cartesian3	<可选>	Cartesian3.ZERO	A Cartesian3 Property specifying the unit vector axis of rotation.
sizeInMeters	Property | boolean	<可选>		A boolean Property specifying whether this billboard's size should be measured in meters.
width	Property | number	<可选>		A numeric Property specifying the width of the billboard in pixels, overriding the native size.
height	Property | number	<可选>		A numeric Property specifying the height of the billboard in pixels, overriding the native size.
scaleByDistance	Property | NearFarScalar	<可选>		A NearFarScalar Property used to scale the point based on distance from the camera.
translucencyByDistance	Property | NearFarScalar	<可选>		A NearFarScalar Property used to set translucency based on distance from the camera.
pixelOffsetScaleByDistance	Property | NearFarScalar	<可选>		A NearFarScalar Property used to set pixelOffset based on distance from the camera.
imageSubRegion	Property | BoundingRectangle	<可选>		A Property specifying a BoundingRectangle that defines a sub-region of the image to use for the billboard, rather than the entire image, measured in pixels from the bottom-left.
distanceDisplayCondition	Property | DistanceDisplayCondition	<可选>		A Property specifying at what distance from the camera that this billboard will be displayed.
disableDepthTestDistance	Property | number	<可选>		A Property specifying the distance from the camera at which to disable the depth test to.