/* This file is automatically rebuilt by the Cesium build process. */
|
define(['exports', './when-e6e3e713', './Check-1df6b9a0', './Math-c5f6c994', './WebGLConstants-7f7d68ac'], function (exports, when, Check, _Math, WebGLConstants) { 'use strict';
|
|
/**
|
* Constants for WebGL index datatypes. These corresponds to the
|
* <code>type</code> parameter of {@link http://www.khronos.org/opengles/sdk/docs/man/xhtml/glDrawElements.xml|drawElements}.
|
*
|
* @exports IndexDatatype
|
*/
|
var IndexDatatype = {
|
/**
|
* 8-bit unsigned byte corresponding to <code>UNSIGNED_BYTE</code> and the type
|
* of an element in <code>Uint8Array</code>.
|
*
|
* @type {Number}
|
* @constant
|
*/
|
UNSIGNED_BYTE : WebGLConstants.WebGLConstants.UNSIGNED_BYTE,
|
|
/**
|
* 16-bit unsigned short corresponding to <code>UNSIGNED_SHORT</code> and the type
|
* of an element in <code>Uint16Array</code>.
|
*
|
* @type {Number}
|
* @constant
|
*/
|
UNSIGNED_SHORT : WebGLConstants.WebGLConstants.UNSIGNED_SHORT,
|
|
/**
|
* 32-bit unsigned int corresponding to <code>UNSIGNED_INT</code> and the type
|
* of an element in <code>Uint32Array</code>.
|
*
|
* @type {Number}
|
* @constant
|
*/
|
UNSIGNED_INT : WebGLConstants.WebGLConstants.UNSIGNED_INT
|
};
|
|
/**
|
* Returns the size, in bytes, of the corresponding datatype.
|
*
|
* @param {IndexDatatype} indexDatatype The index datatype to get the size of.
|
* @returns {Number} The size in bytes.
|
*
|
* @example
|
* // Returns 2
|
* var size = Cesium.IndexDatatype.getSizeInBytes(Cesium.IndexDatatype.UNSIGNED_SHORT);
|
*/
|
IndexDatatype.getSizeInBytes = function(indexDatatype) {
|
switch(indexDatatype) {
|
case IndexDatatype.UNSIGNED_BYTE:
|
return Uint8Array.BYTES_PER_ELEMENT;
|
case IndexDatatype.UNSIGNED_SHORT:
|
return Uint16Array.BYTES_PER_ELEMENT;
|
case IndexDatatype.UNSIGNED_INT:
|
return Uint32Array.BYTES_PER_ELEMENT;
|
}
|
|
//>>includeStart('debug', pragmas.debug);
|
throw new Check.DeveloperError('indexDatatype is required and must be a valid IndexDatatype constant.');
|
//>>includeEnd('debug');
|
};
|
|
/**
|
* Gets the datatype with a given size in bytes.
|
*
|
* @param {Number} sizeInBytes The size of a single index in bytes.
|
* @returns {IndexDatatype} The index datatype with the given size.
|
*/
|
IndexDatatype.fromSizeInBytes = function(sizeInBytes) {
|
switch (sizeInBytes) {
|
case 2:
|
return IndexDatatype.UNSIGNED_SHORT;
|
case 4:
|
return IndexDatatype.UNSIGNED_INT;
|
case 1:
|
return IndexDatatype.UNSIGNED_BYTE;
|
//>>includeStart('debug', pragmas.debug);
|
default:
|
throw new Check.DeveloperError('Size in bytes cannot be mapped to an IndexDatatype');
|
//>>includeEnd('debug');
|
}
|
};
|
|
/**
|
* Validates that the provided index datatype is a valid {@link IndexDatatype}.
|
*
|
* @param {IndexDatatype} indexDatatype The index datatype to validate.
|
* @returns {Boolean} <code>true</code> if the provided index datatype is a valid value; otherwise, <code>false</code>.
|
*
|
* @example
|
* if (!Cesium.IndexDatatype.validate(indexDatatype)) {
|
* throw new Cesium.DeveloperError('indexDatatype must be a valid value.');
|
* }
|
*/
|
IndexDatatype.validate = function(indexDatatype) {
|
return when.defined(indexDatatype) &&
|
(indexDatatype === IndexDatatype.UNSIGNED_BYTE ||
|
indexDatatype === IndexDatatype.UNSIGNED_SHORT ||
|
indexDatatype === IndexDatatype.UNSIGNED_INT);
|
};
|
|
/**
|
* Creates a typed array that will store indices, using either <code><Uint16Array</code>
|
* or <code>Uint32Array</code> depending on the number of vertices.
|
*
|
* @param {Number} numberOfVertices Number of vertices that the indices will reference.
|
* @param {Number|Array} indicesLengthOrArray Passed through to the typed array constructor.
|
* @returns {Uint16Array|Uint32Array} A <code>Uint16Array</code> or <code>Uint32Array</code> constructed with <code>indicesLengthOrArray</code>.
|
*
|
* @example
|
* this.indices = Cesium.IndexDatatype.createTypedArray(positions.length / 3, numberOfIndices);
|
*/
|
IndexDatatype.createTypedArray = function(numberOfVertices, indicesLengthOrArray) {
|
//>>includeStart('debug', pragmas.debug);
|
if (!when.defined(numberOfVertices)) {
|
throw new Check.DeveloperError('numberOfVertices is required.');
|
}
|
//>>includeEnd('debug');
|
|
if (numberOfVertices >= _Math.CesiumMath.SIXTY_FOUR_KILOBYTES) {
|
return new Uint32Array(indicesLengthOrArray);
|
}
|
|
return new Uint16Array(indicesLengthOrArray);
|
};
|
|
/**
|
* Creates a typed array from a source array buffer. The resulting typed array will store indices, using either <code><Uint16Array</code>
|
* or <code>Uint32Array</code> depending on the number of vertices.
|
*
|
* @param {Number} numberOfVertices Number of vertices that the indices will reference.
|
* @param {ArrayBuffer} sourceArray Passed through to the typed array constructor.
|
* @param {Number} byteOffset Passed through to the typed array constructor.
|
* @param {Number} length Passed through to the typed array constructor.
|
* @returns {Uint16Array|Uint32Array} A <code>Uint16Array</code> or <code>Uint32Array</code> constructed with <code>sourceArray</code>, <code>byteOffset</code>, and <code>length</code>.
|
*
|
*/
|
IndexDatatype.createTypedArrayFromArrayBuffer = function(numberOfVertices, sourceArray, byteOffset, length) {
|
//>>includeStart('debug', pragmas.debug);
|
if (!when.defined(numberOfVertices)) {
|
throw new Check.DeveloperError('numberOfVertices is required.');
|
}
|
if (!when.defined(sourceArray)) {
|
throw new Check.DeveloperError('sourceArray is required.');
|
}
|
if (!when.defined(byteOffset)) {
|
throw new Check.DeveloperError('byteOffset is required.');
|
}
|
//>>includeEnd('debug');
|
|
if (numberOfVertices >= _Math.CesiumMath.SIXTY_FOUR_KILOBYTES) {
|
return new Uint32Array(sourceArray, byteOffset, length);
|
}
|
|
return new Uint16Array(sourceArray, byteOffset, length);
|
};
|
var IndexDatatype$1 = Object.freeze(IndexDatatype);
|
|
exports.IndexDatatype = IndexDatatype$1;
|
|
});
|
