An appearance for
PolylineGeometry that supports shading with materials.
| 参数名称 | 类型 | 描述信息 | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
options |
object |
可选
Object with the following properties:
|
使用示例:
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.PolylineMaterialAppearance.VERTEX_FORMAT
})
}),
appearance : new Cesium.PolylineMaterialAppearance({
material : Cesium.Material.fromType('Color')
})
});参考:
成员(属性)
static constant Cesium.PolylineMaterialAppearance.VERTEX_FORMAT : VertexFormat
The
VertexFormat that all PolylineMaterialAppearance instances
are compatible with. This requires position and st attributes.
When
true, the geometry is expected to be closed so
PolylineMaterialAppearance#renderState has backface culling enabled.
This is always false for PolylineMaterialAppearance.
-
默认值:
false
The GLSL source code for the fragment shader.
The material used to determine the fragment color. Unlike other
PolylineMaterialAppearance
properties, this is not read-only, so an appearance's material can change on the fly.
-
默认值:
Material.ColorType参考:
The WebGL fixed-function state to use when rendering the geometry.
The render state can be explicitly defined when constructing a PolylineMaterialAppearance
instance, or it is set implicitly via PolylineMaterialAppearance#translucent
and PolylineMaterialAppearance#closed.
When
true, the geometry is expected to appear translucent so
PolylineMaterialAppearance#renderState has alpha blending enabled.
-
默认值:
true
readonly vertexFormat : VertexFormat
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.
The GLSL source code for the vertex shader.
方法
Procedurally creates the full GLSL fragment shader source. For
PolylineMaterialAppearance,
this is derived from PolylineMaterialAppearance#fragmentShaderSource and PolylineMaterialAppearance#material.
返回值:
The full GLSL fragment shader source.
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.
Determines if the geometry is translucent based on
PolylineMaterialAppearance#translucent and Material#isTranslucent.
返回值:
true if the appearance is translucent.