kotlin-cesium-engine/cesium.engine/GeometryInstanceAttribute

GeometryInstanceAttribute

external class GeometryInstanceAttribute(options: GeometryInstanceAttribute.ConstructorOptions)(source)

Values and type information for per-instance geometry attributes.

const instance = new GeometryInstance({
  geometry : BoxGeometry.fromDimensions({
    dimensions : new Cartesian3(1000000.0, 1000000.0, 500000.0)
  }),
  modelMatrix : Matrix4.multiplyByTranslation(Transforms.eastNorthUpToFixedFrame(
    Cartesian3.fromDegrees(0.0, 0.0)), new Cartesian3(0.0, 0.0, 1000000.0), new Matrix4()),
  id : 'box',
  attributes : {
    color : new GeometryInstanceAttribute({
      componentDatatype : ComponentDatatype.UNSIGNED_BYTE,
      componentsPerAttribute : 4,
      normalize : true,
      value : [255, 255, 0, 255]
    })
  }
});

Constructors

constructor(options: GeometryInstanceAttribute.ConstructorOptions)

Types

ConstructorOptions

sealed interface ConstructorOptions

Properties

componentDatatype

var componentDatatype: ComponentDatatype

The datatype of each component in the attribute, e.g., individual elements in GeometryInstanceAttribute.value.

componentsPerAttribute

var componentsPerAttribute: Int

A number between 1 and 4 that defines the number of components in an attributes. For example, a position attribute with x, y, and z components would have 3 as shown in the code example.

normalize

var normalize: Boolean

When true and componentDatatype is an integer format, indicate that the components should be mapped to the range 0, 1 (unsigned) or -1, 1 (signed) when they are accessed as floating-point for rendering.

value

var value: ReadonlyArray<Double>

The values for the attributes stored in a typed array. In the code example, every three elements in values defines one attributes since componentsPerAttribute is 3.

GeometryInstanceAttribute

See also

Constructors

Types

Properties