Class: PolylineMaterialAppearance

PolylineMaterialAppearance

new PolylineMaterialAppearance()

PolylineGeometry's appearance supports material coloring.

Name Type Default Description
options.translucent Boolean true optional

When true, the geometry should be semi transparent, so PolylineMaterialAppearance # renderState has enabled alpha blending.
options.material Material Material.ColorType optional

The material used to determine the color of the fragment.
options.vertexShaderSource String optional

Optional GLSL vertex shader source, used to override default vertex shaders.
options.fragmentShaderSource String optional

Optional GLSL fragment shader source, used to override default fragment shaders.
options.renderState RenderState optional

Optional rendering state, used to override the default rendering state.
Example
var primitive = new SuperMap3D.Primitive({
  geometryInstances : new SuperMap3D.GeometryInstance({
    geometry : new SuperMap3D.PolylineGeometry({
      positions : SuperMap3D.Cartesian3.fromDegreesArray([
        0.0, 0.0,
        5.0, 0.0
      ]),
      width : 10.0,
      vertexFormat : SuperMap3D.PolylineMaterialAppearance.VERTEX_FORMAT
    })
  }),
  appearance : new SuperMap3D.PolylineMaterialAppearance({
    material : SuperMap3D.Material.fromType('Color')
  })
});

Members

(static, constant) VERTEX_FORMATVertexFormat

All PolylineMaterialAppearance instances are compatible with VertexFormat. This requires the position and st attributes.

readonly closedBoolean

When true, the geometry will be turned off, so PolylineMaterialAppearance # renderState will enable backside culling. This is always incorrect for polyline material appearance.

Default Value:
false

readonly fragmentShaderSourceString

GLSL source code for fragment shader.

materialMaterial

The material used to determine the color of the fragment. Unlike other PolylineMaterialAppearance properties, it is not read-only, so the appearance material can be changed at any time.

Default Value:
Material.ColorType

readonly renderStateObject

The WebGL fixed feature state used when rendering geometric shapes.

The rendering state can be explicitly defined when constructing PolylineMaterialAppearance instances, or through PolylineMaterialAppearance # translated and PolylineMaterialAppearance # closed

translucentBoolean

When true, the geometry should be semi transparent, so PolylineMaterialAppearance # renderState enables alpha blending.

Default Value:
true

readonly vertexFormatVertexFormat

This appearance instance is compatible with VertexFormat, which allows a geometry to have more vertex attributes and still be compatible - at the cost of potential performance costs - but it cannot be omitted.

Default Value:
PolylineMaterialAppearance.VERTEX_FORMAT

readonly vertexShaderSourceString

GLSL source code for vertex shader.

Methods

getFragmentShaderSource(){String}

Create a complete GLSL fragment shader source on the program. For PolylineMaterialAppearance, this is derived from PolylineMaterialAppearance # fragmentShaderSource and PolylineMaterialAppearance # material.

Returns:
Type Description
String Complete GLSL fragment shader source code.

getRenderState(){Object}

Create presentation status. This is not the final rendering state instance; On the contrary, it can contain a subset of presentation state attributes that are the same as those created in the context.

Returns:
Type Description
Object Present the status.

isTranslucent(){Boolean}

Determine whether the geometry is semi transparent based on PolylineMaterialAppearance # Translucent and Material # isTranslucent.

Returns:
Type Description
Boolean If the appearance is semi transparent, it is True.