ComponentDatatype

ComponentDatatype()
Core/ComponentDatatype.js 30

WebGL component datatypes. Components are intrinsics, which form attributes, which form vertices.

Members

staticconstantCesium.ComponentDatatype.DOUBLE : Number
Core/ComponentDatatype.js 87

64-bit floating-point corresponding to gl.DOUBLE (in Desktop OpenGL; this is not supported in WebGL, and is emulated in Cesium via GeometryPipeline.encodeAttribute) and the type of an element in Float64Array.
Default Value: 0x140A

staticconstantCesium.ComponentDatatype.BYTE : Number
Core/ComponentDatatype.js 38

8-bit signed byte corresponding to gl.BYTE and the type of an element in Int8Array.

staticconstantCesium.ComponentDatatype.FLOAT : Number
Core/ComponentDatatype.js 74

32-bit floating-point corresponding to FLOAT and the type of an element in Float32Array.

staticconstantCesium.ComponentDatatype.SHORT : Number
Core/ComponentDatatype.js 56

16-bit signed short corresponding to SHORT and the type of an element in Int16Array.

staticconstantCesium.ComponentDatatype.UNSIGNED_BYTE : Number
Core/ComponentDatatype.js 47

8-bit unsigned byte corresponding to UNSIGNED_BYTE and the type of an element in Uint8Array.

staticconstantCesium.ComponentDatatype.UNSIGNED_SHORT : Number
Core/ComponentDatatype.js 65

16-bit unsigned short corresponding to UNSIGNED_SHORT and the type of an element in Uint16Array.

Methods

staticCesium.ComponentDatatype.createArrayBufferView(componentDatatype, buffer, byteOffset, length) → Int8Array|Uint8Array|Int16Array|Uint16Array|Float32Array|Float64Array
Core/ComponentDatatype.js 227

Creates a typed view of an array of bytes.
Name Type Description
componentDatatype ComponentDatatype The type of the view to create.
buffer ArrayBuffer The buffer storage to use for the view.
byteOffset Number optional The offset, in bytes, to the first element in the view.
length Number optional The number of elements in the view.
Returns:
A typed array view of the buffer.
Throws:

staticCesium.ComponentDatatype.createTypedArray(componentDatatype, valuesOrLength) → Int8Array|Uint8Array|Int16Array|Uint16Array|Float32Array|Float64Array
Core/ComponentDatatype.js 188

Creates a typed array corresponding to component data type.
Name Type Description
componentDatatype ComponentDatatype The component data type.
valuesOrLength Number | Array The length of the array to create or an array.
Returns:
A typed array.
Throws:
Example:
// creates a Float32Array with length of 100
var typedArray = Cesium.ComponentDatatype.createTypedArray(Cesium.ComponentDatatype.FLOAT, 100);

staticCesium.ComponentDatatype.fromTypedArray(array) → ComponentDatatype
Core/ComponentDatatype.js 133

Gets the ComponentDatatype for the provided TypedArray instance.
Name Type Description
array TypedArray The typed array.
Returns:
The ComponentDatatype for the provided array, or undefined if the array is not a TypedArray.

staticCesium.ComponentDatatype.getSizeInBytes(componentDatatype) → Number
Core/ComponentDatatype.js 102

Returns the size, in bytes, of the corresponding datatype.
Name Type Description
componentDatatype ComponentDatatype The component datatype to get the size of.
Returns:
The size in bytes.
Throws:
Example:
// Returns Int8Array.BYTES_PER_ELEMENT
var size = Cesium.ComponentDatatype.getSizeInBytes(Cesium.ComponentDatatype.BYTE);

staticCesium.ComponentDatatype.validate(componentDatatype) → Boolean
Core/ComponentDatatype.js 165

Validates that the provided component datatype is a valid ComponentDatatype
Name Type Description
componentDatatype ComponentDatatype The component datatype to validate.
Returns:
true if the provided component datatype is a valid value; otherwise, false.
Example:
if (!Cesium.ComponentDatatype.validate(componentDatatype)) {
  throw new Cesium.DeveloperError('componentDatatype must be a valid value.');
}