PolylineColorAppearance
查阅Mars3D API

new Cesium.PolylineColorAppearance(options)
engine/Source/Scene/PolylineColorAppearance.js 52

An appearance for GeometryInstance instances with color attributes and PolylineGeometry or GroundPolylineGeometry. This allows several geometry instances, each with a different color, to be drawn with the same Primitive.
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
translucent boolean true 可选 When true, the geometry is expected to appear translucent so PolylineColorAppearance#renderState has alpha blending enabled.
vertexShaderSource string 可选 Optional GLSL vertex shader source to override the default vertex shader.
fragmentShaderSource string 可选 Optional GLSL fragment shader source to override the default fragment shader.
renderState object 可选 Optional render state to override the default render state.
使用示例:
// A solid white line segment
const primitive = new Cesium.Primitive({
  geometryInstances : new Cesium.GeometryInstance({
    geometry : new Cesium.PolylineGeometry({
      positions : Cesium.Cartesian3.fromDegreesArray([
        0.0, 0.0,
        5.0, 0.0
      ]),
      width : 10.0,
      vertexFormat : Cesium.PolylineColorAppearance.VERTEX_FORMAT
    }),
    attributes : {
      color : Cesium.ColorGeometryInstanceAttribute.fromColor(new Cesium.Color(1.0, 1.0, 1.0, 1.0))
    }
  }),
  appearance : new Cesium.PolylineColorAppearance({
    translucent : false
  })
});

成员(属性)

static constant Cesium.PolylineColorAppearance.VERTEX_FORMAT : VertexFormat
engine/Source/Scene/PolylineColorAppearance.js 191

The VertexFormat that all PolylineColorAppearance instances are compatible with. This requires only a position attribute.

readonly closed : boolean
engine/Source/Scene/PolylineColorAppearance.js 158

When true, the geometry is expected to be closed so PolylineColorAppearance#renderState has backface culling enabled. This is always false for PolylineColorAppearance.
默认值: false

readonly fragmentShaderSource : string
engine/Source/Scene/PolylineColorAppearance.js 122

The GLSL source code for the fragment shader.

material : Material
engine/Source/Scene/PolylineColorAppearance.js 67

This property is part of the Appearance interface, but is not used by PolylineColorAppearance since a fully custom fragment shader is used.
默认值: undefined

readonly renderState : object
engine/Source/Scene/PolylineColorAppearance.js 140

The WebGL fixed-function state to use when rendering the geometry.

The render state can be explicitly defined when constructing a PolylineColorAppearance instance, or it is set implicitly via PolylineColorAppearance#translucent.

translucent : boolean
engine/Source/Scene/PolylineColorAppearance.js 77

When true, the geometry is expected to appear translucent so PolylineColorAppearance#renderState has alpha blending enabled.
默认值: true

readonly vertexFormat : VertexFormat
engine/Source/Scene/PolylineColorAppearance.js 176

The VertexFormat that this appearance instance is compatible with. A geometry can have more vertex attributes and still be compatible - at a potential performance cost - but it can't have less.
默认值: PolylineColorAppearance.VERTEX_FORMAT

readonly vertexShaderSource : string
engine/Source/Scene/PolylineColorAppearance.js 108

The GLSL source code for the vertex shader.

方法

getFragmentShaderSource() → string
engine/Source/Scene/PolylineColorAppearance.js 200

Procedurally creates the full GLSL fragment shader source.
返回值:
The full GLSL fragment shader source.

getRenderState() → object
engine/Source/Scene/PolylineColorAppearance.js 222

Creates a render state. This is not the final render state instance; instead, it can contain a subset of render state properties identical to the render state created in the context.
返回值:
The render state.

isTranslucent() → boolean
engine/Source/Scene/PolylineColorAppearance.js 210

Determines if the geometry is translucent based on PolylineColorAppearance#translucent.
返回值:
true if the appearance is translucent.
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