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878 lines
26 KiB
JavaScript
878 lines
26 KiB
JavaScript
import Cartesian2 from "./Cartesian2.js";
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import Check from "./Check.js";
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import defaultValue from "./defaultValue.js";
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import defined from "./defined.js";
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/**
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* A 2x2 matrix, indexable as a column-major order array.
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* Constructor parameters are in row-major order for code readability.
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* @alias Matrix2
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* @constructor
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* @implements {ArrayLike<number>}
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*
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* @param {Number} [column0Row0=0.0] The value for column 0, row 0.
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* @param {Number} [column1Row0=0.0] The value for column 1, row 0.
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* @param {Number} [column0Row1=0.0] The value for column 0, row 1.
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* @param {Number} [column1Row1=0.0] The value for column 1, row 1.
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*
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* @see Matrix2.fromColumnMajorArray
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* @see Matrix2.fromRowMajorArray
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* @see Matrix2.fromScale
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* @see Matrix2.fromUniformScale
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* @see Matrix3
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* @see Matrix4
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*/
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function Matrix2(column0Row0, column1Row0, column0Row1, column1Row1) {
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this[0] = defaultValue(column0Row0, 0.0);
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this[1] = defaultValue(column0Row1, 0.0);
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this[2] = defaultValue(column1Row0, 0.0);
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this[3] = defaultValue(column1Row1, 0.0);
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}
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/**
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* The number of elements used to pack the object into an array.
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* @type {Number}
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*/
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Matrix2.packedLength = 4;
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/**
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* Stores the provided instance into the provided array.
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*
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* @param {Matrix2} value The value to pack.
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* @param {Number[]} array The array to pack into.
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* @param {Number} [startingIndex=0] The index into the array at which to start packing the elements.
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*
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* @returns {Number[]} The array that was packed into
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*/
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Matrix2.pack = function (value, array, startingIndex) {
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("value", value);
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Check.defined("array", array);
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//>>includeEnd('debug');
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startingIndex = defaultValue(startingIndex, 0);
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array[startingIndex++] = value[0];
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array[startingIndex++] = value[1];
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array[startingIndex++] = value[2];
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array[startingIndex++] = value[3];
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return array;
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};
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/**
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* Retrieves an instance from a packed array.
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*
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* @param {Number[]} array The packed array.
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* @param {Number} [startingIndex=0] The starting index of the element to be unpacked.
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* @param {Matrix2} [result] The object into which to store the result.
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* @returns {Matrix2} The modified result parameter or a new Matrix2 instance if one was not provided.
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*/
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Matrix2.unpack = function (array, startingIndex, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.defined("array", array);
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//>>includeEnd('debug');
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startingIndex = defaultValue(startingIndex, 0);
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if (!defined(result)) {
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result = new Matrix2();
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}
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result[0] = array[startingIndex++];
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result[1] = array[startingIndex++];
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result[2] = array[startingIndex++];
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result[3] = array[startingIndex++];
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return result;
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};
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/**
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* Duplicates a Matrix2 instance.
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*
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* @param {Matrix2} matrix The matrix to duplicate.
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* @param {Matrix2} [result] The object onto which to store the result.
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* @returns {Matrix2} The modified result parameter or a new Matrix2 instance if one was not provided. (Returns undefined if matrix is undefined)
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*/
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Matrix2.clone = function (matrix, result) {
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if (!defined(matrix)) {
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return undefined;
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}
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if (!defined(result)) {
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return new Matrix2(matrix[0], matrix[2], matrix[1], matrix[3]);
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}
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result[0] = matrix[0];
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result[1] = matrix[1];
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result[2] = matrix[2];
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result[3] = matrix[3];
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return result;
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};
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/**
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* Creates a Matrix2 from 4 consecutive elements in an array.
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*
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* @param {Number[]} array The array whose 4 consecutive elements correspond to the positions of the matrix. Assumes column-major order.
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* @param {Number} [startingIndex=0] The offset into the array of the first element, which corresponds to first column first row position in the matrix.
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* @param {Matrix2} [result] The object onto which to store the result.
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* @returns {Matrix2} The modified result parameter or a new Matrix2 instance if one was not provided.
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*
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* @example
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* // Create the Matrix2:
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* // [1.0, 2.0]
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* // [1.0, 2.0]
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*
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* var v = [1.0, 1.0, 2.0, 2.0];
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* var m = Cesium.Matrix2.fromArray(v);
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*
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* // Create same Matrix2 with using an offset into an array
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* var v2 = [0.0, 0.0, 1.0, 1.0, 2.0, 2.0];
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* var m2 = Cesium.Matrix2.fromArray(v2, 2);
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*/
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Matrix2.fromArray = function (array, startingIndex, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.defined("array", array);
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//>>includeEnd('debug');
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startingIndex = defaultValue(startingIndex, 0);
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if (!defined(result)) {
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result = new Matrix2();
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}
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result[0] = array[startingIndex];
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result[1] = array[startingIndex + 1];
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result[2] = array[startingIndex + 2];
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result[3] = array[startingIndex + 3];
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return result;
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};
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/**
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* Creates a Matrix2 instance from a column-major order array.
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*
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* @param {Number[]} values The column-major order array.
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* @param {Matrix2} [result] The object in which the result will be stored, if undefined a new instance will be created.
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* @returns {Matrix2} The modified result parameter, or a new Matrix2 instance if one was not provided.
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*/
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Matrix2.fromColumnMajorArray = function (values, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.defined("values", values);
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//>>includeEnd('debug');
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return Matrix2.clone(values, result);
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};
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/**
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* Creates a Matrix2 instance from a row-major order array.
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* The resulting matrix will be in column-major order.
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*
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* @param {Number[]} values The row-major order array.
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* @param {Matrix2} [result] The object in which the result will be stored, if undefined a new instance will be created.
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* @returns {Matrix2} The modified result parameter, or a new Matrix2 instance if one was not provided.
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*/
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Matrix2.fromRowMajorArray = function (values, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.defined("values", values);
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//>>includeEnd('debug');
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if (!defined(result)) {
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return new Matrix2(values[0], values[1], values[2], values[3]);
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}
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result[0] = values[0];
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result[1] = values[2];
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result[2] = values[1];
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result[3] = values[3];
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return result;
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};
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/**
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* Computes a Matrix2 instance representing a non-uniform scale.
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*
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* @param {Cartesian2} scale The x and y scale factors.
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* @param {Matrix2} [result] The object in which the result will be stored, if undefined a new instance will be created.
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* @returns {Matrix2} The modified result parameter, or a new Matrix2 instance if one was not provided.
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*
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* @example
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* // Creates
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* // [7.0, 0.0]
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* // [0.0, 8.0]
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* var m = Cesium.Matrix2.fromScale(new Cesium.Cartesian2(7.0, 8.0));
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*/
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Matrix2.fromScale = function (scale, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("scale", scale);
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//>>includeEnd('debug');
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if (!defined(result)) {
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return new Matrix2(scale.x, 0.0, 0.0, scale.y);
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}
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result[0] = scale.x;
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result[1] = 0.0;
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result[2] = 0.0;
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result[3] = scale.y;
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return result;
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};
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/**
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* Computes a Matrix2 instance representing a uniform scale.
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*
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* @param {Number} scale The uniform scale factor.
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* @param {Matrix2} [result] The object in which the result will be stored, if undefined a new instance will be created.
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* @returns {Matrix2} The modified result parameter, or a new Matrix2 instance if one was not provided.
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*
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* @example
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* // Creates
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* // [2.0, 0.0]
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* // [0.0, 2.0]
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* var m = Cesium.Matrix2.fromUniformScale(2.0);
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*/
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Matrix2.fromUniformScale = function (scale, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.number("scale", scale);
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//>>includeEnd('debug');
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if (!defined(result)) {
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return new Matrix2(scale, 0.0, 0.0, scale);
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}
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result[0] = scale;
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result[1] = 0.0;
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result[2] = 0.0;
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result[3] = scale;
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return result;
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};
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/**
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* Creates a rotation matrix.
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*
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* @param {Number} angle The angle, in radians, of the rotation. Positive angles are counterclockwise.
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* @param {Matrix2} [result] The object in which the result will be stored, if undefined a new instance will be created.
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* @returns {Matrix2} The modified result parameter, or a new Matrix2 instance if one was not provided.
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*
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* @example
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* // Rotate a point 45 degrees counterclockwise.
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* var p = new Cesium.Cartesian2(5, 6);
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* var m = Cesium.Matrix2.fromRotation(Cesium.Math.toRadians(45.0));
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* var rotated = Cesium.Matrix2.multiplyByVector(m, p, new Cesium.Cartesian2());
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*/
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Matrix2.fromRotation = function (angle, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.number("angle", angle);
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//>>includeEnd('debug');
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var cosAngle = Math.cos(angle);
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var sinAngle = Math.sin(angle);
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if (!defined(result)) {
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return new Matrix2(cosAngle, -sinAngle, sinAngle, cosAngle);
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}
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result[0] = cosAngle;
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result[1] = sinAngle;
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result[2] = -sinAngle;
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result[3] = cosAngle;
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return result;
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};
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/**
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* Creates an Array from the provided Matrix2 instance.
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* The array will be in column-major order.
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*
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* @param {Matrix2} matrix The matrix to use..
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* @param {Number[]} [result] The Array onto which to store the result.
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* @returns {Number[]} The modified Array parameter or a new Array instance if one was not provided.
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*/
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Matrix2.toArray = function (matrix, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("matrix", matrix);
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//>>includeEnd('debug');
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if (!defined(result)) {
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return [matrix[0], matrix[1], matrix[2], matrix[3]];
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}
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result[0] = matrix[0];
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result[1] = matrix[1];
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result[2] = matrix[2];
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result[3] = matrix[3];
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return result;
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};
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/**
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* Computes the array index of the element at the provided row and column.
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*
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* @param {Number} row The zero-based index of the row.
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* @param {Number} column The zero-based index of the column.
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* @returns {Number} The index of the element at the provided row and column.
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*
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* @exception {DeveloperError} row must be 0 or 1.
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* @exception {DeveloperError} column must be 0 or 1.
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*
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* @example
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* var myMatrix = new Cesium.Matrix2();
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* var column1Row0Index = Cesium.Matrix2.getElementIndex(1, 0);
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* var column1Row0 = myMatrix[column1Row0Index]
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* myMatrix[column1Row0Index] = 10.0;
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*/
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Matrix2.getElementIndex = function (column, row) {
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.number.greaterThanOrEquals("row", row, 0);
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Check.typeOf.number.lessThanOrEquals("row", row, 1);
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Check.typeOf.number.greaterThanOrEquals("column", column, 0);
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Check.typeOf.number.lessThanOrEquals("column", column, 1);
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//>>includeEnd('debug');
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return column * 2 + row;
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};
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/**
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* Retrieves a copy of the matrix column at the provided index as a Cartesian2 instance.
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*
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* @param {Matrix2} matrix The matrix to use.
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* @param {Number} index The zero-based index of the column to retrieve.
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* @param {Cartesian2} result The object onto which to store the result.
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* @returns {Cartesian2} The modified result parameter.
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*
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* @exception {DeveloperError} index must be 0 or 1.
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*/
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Matrix2.getColumn = function (matrix, index, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("matrix", matrix);
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Check.typeOf.number.greaterThanOrEquals("index", index, 0);
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Check.typeOf.number.lessThanOrEquals("index", index, 1);
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Check.typeOf.object("result", result);
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//>>includeEnd('debug');
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var startIndex = index * 2;
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var x = matrix[startIndex];
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var y = matrix[startIndex + 1];
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result.x = x;
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result.y = y;
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return result;
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};
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/**
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* Computes a new matrix that replaces the specified column in the provided matrix with the provided Cartesian2 instance.
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*
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* @param {Matrix2} matrix The matrix to use.
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* @param {Number} index The zero-based index of the column to set.
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* @param {Cartesian2} cartesian The Cartesian whose values will be assigned to the specified column.
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* @param {Cartesian2} result The object onto which to store the result.
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* @returns {Matrix2} The modified result parameter.
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*
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* @exception {DeveloperError} index must be 0 or 1.
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*/
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Matrix2.setColumn = function (matrix, index, cartesian, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("matrix", matrix);
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Check.typeOf.number.greaterThanOrEquals("index", index, 0);
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Check.typeOf.number.lessThanOrEquals("index", index, 1);
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Check.typeOf.object("cartesian", cartesian);
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Check.typeOf.object("result", result);
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//>>includeEnd('debug');
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result = Matrix2.clone(matrix, result);
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var startIndex = index * 2;
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result[startIndex] = cartesian.x;
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result[startIndex + 1] = cartesian.y;
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return result;
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};
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/**
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* Retrieves a copy of the matrix row at the provided index as a Cartesian2 instance.
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*
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* @param {Matrix2} matrix The matrix to use.
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* @param {Number} index The zero-based index of the row to retrieve.
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* @param {Cartesian2} result The object onto which to store the result.
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* @returns {Cartesian2} The modified result parameter.
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*
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* @exception {DeveloperError} index must be 0 or 1.
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*/
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Matrix2.getRow = function (matrix, index, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("matrix", matrix);
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Check.typeOf.number.greaterThanOrEquals("index", index, 0);
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Check.typeOf.number.lessThanOrEquals("index", index, 1);
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Check.typeOf.object("result", result);
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//>>includeEnd('debug');
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var x = matrix[index];
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var y = matrix[index + 2];
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result.x = x;
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result.y = y;
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return result;
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};
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/**
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* Computes a new matrix that replaces the specified row in the provided matrix with the provided Cartesian2 instance.
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*
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* @param {Matrix2} matrix The matrix to use.
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* @param {Number} index The zero-based index of the row to set.
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* @param {Cartesian2} cartesian The Cartesian whose values will be assigned to the specified row.
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* @param {Matrix2} result The object onto which to store the result.
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* @returns {Matrix2} The modified result parameter.
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*
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* @exception {DeveloperError} index must be 0 or 1.
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*/
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Matrix2.setRow = function (matrix, index, cartesian, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("matrix", matrix);
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Check.typeOf.number.greaterThanOrEquals("index", index, 0);
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Check.typeOf.number.lessThanOrEquals("index", index, 1);
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Check.typeOf.object("cartesian", cartesian);
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Check.typeOf.object("result", result);
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//>>includeEnd('debug');
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result = Matrix2.clone(matrix, result);
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result[index] = cartesian.x;
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result[index + 2] = cartesian.y;
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return result;
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};
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var scratchColumn = new Cartesian2();
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/**
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* Extracts the non-uniform scale assuming the matrix is an affine transformation.
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*
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* @param {Matrix2} matrix The matrix.
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* @param {Cartesian2} result The object onto which to store the result.
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* @returns {Cartesian2} The modified result parameter.
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*/
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Matrix2.getScale = function (matrix, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("matrix", matrix);
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Check.typeOf.object("result", result);
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//>>includeEnd('debug');
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result.x = Cartesian2.magnitude(
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Cartesian2.fromElements(matrix[0], matrix[1], scratchColumn)
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);
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result.y = Cartesian2.magnitude(
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Cartesian2.fromElements(matrix[2], matrix[3], scratchColumn)
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);
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return result;
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};
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var scratchScale = new Cartesian2();
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/**
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* Computes the maximum scale assuming the matrix is an affine transformation.
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* The maximum scale is the maximum length of the column vectors.
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*
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* @param {Matrix2} matrix The matrix.
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* @returns {Number} The maximum scale.
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*/
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Matrix2.getMaximumScale = function (matrix) {
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Matrix2.getScale(matrix, scratchScale);
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return Cartesian2.maximumComponent(scratchScale);
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};
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/**
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* Computes the product of two matrices.
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*
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* @param {Matrix2} left The first matrix.
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* @param {Matrix2} right The second matrix.
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* @param {Matrix2} result The object onto which to store the result.
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* @returns {Matrix2} The modified result parameter.
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*/
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Matrix2.multiply = function (left, right, result) {
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//>>includeStart('debug', pragmas.debug);
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Check.typeOf.object("left", left);
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Check.typeOf.object("right", right);
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|
Check.typeOf.object("result", result);
|
|
//>>includeEnd('debug');
|
|
|
|
var column0Row0 = left[0] * right[0] + left[2] * right[1];
|
|
var column1Row0 = left[0] * right[2] + left[2] * right[3];
|
|
var column0Row1 = left[1] * right[0] + left[3] * right[1];
|
|
var column1Row1 = left[1] * right[2] + left[3] * right[3];
|
|
|
|
result[0] = column0Row0;
|
|
result[1] = column0Row1;
|
|
result[2] = column1Row0;
|
|
result[3] = column1Row1;
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Computes the sum of two matrices.
|
|
*
|
|
* @param {Matrix2} left The first matrix.
|
|
* @param {Matrix2} right The second matrix.
|
|
* @param {Matrix2} result The object onto which to store the result.
|
|
* @returns {Matrix2} The modified result parameter.
|
|
*/
|
|
Matrix2.add = function (left, right, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
Check.typeOf.object("left", left);
|
|
Check.typeOf.object("right", right);
|
|
Check.typeOf.object("result", result);
|
|
//>>includeEnd('debug');
|
|
|
|
result[0] = left[0] + right[0];
|
|
result[1] = left[1] + right[1];
|
|
result[2] = left[2] + right[2];
|
|
result[3] = left[3] + right[3];
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Computes the difference of two matrices.
|
|
*
|
|
* @param {Matrix2} left The first matrix.
|
|
* @param {Matrix2} right The second matrix.
|
|
* @param {Matrix2} result The object onto which to store the result.
|
|
* @returns {Matrix2} The modified result parameter.
|
|
*/
|
|
Matrix2.subtract = function (left, right, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
Check.typeOf.object("left", left);
|
|
Check.typeOf.object("right", right);
|
|
Check.typeOf.object("result", result);
|
|
//>>includeEnd('debug');
|
|
|
|
result[0] = left[0] - right[0];
|
|
result[1] = left[1] - right[1];
|
|
result[2] = left[2] - right[2];
|
|
result[3] = left[3] - right[3];
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Computes the product of a matrix and a column vector.
|
|
*
|
|
* @param {Matrix2} matrix The matrix.
|
|
* @param {Cartesian2} cartesian The column.
|
|
* @param {Cartesian2} result The object onto which to store the result.
|
|
* @returns {Cartesian2} The modified result parameter.
|
|
*/
|
|
Matrix2.multiplyByVector = function (matrix, cartesian, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
Check.typeOf.object("matrix", matrix);
|
|
Check.typeOf.object("cartesian", cartesian);
|
|
Check.typeOf.object("result", result);
|
|
//>>includeEnd('debug');
|
|
|
|
var x = matrix[0] * cartesian.x + matrix[2] * cartesian.y;
|
|
var y = matrix[1] * cartesian.x + matrix[3] * cartesian.y;
|
|
|
|
result.x = x;
|
|
result.y = y;
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Computes the product of a matrix and a scalar.
|
|
*
|
|
* @param {Matrix2} matrix The matrix.
|
|
* @param {Number} scalar The number to multiply by.
|
|
* @param {Matrix2} result The object onto which to store the result.
|
|
* @returns {Matrix2} The modified result parameter.
|
|
*/
|
|
Matrix2.multiplyByScalar = function (matrix, scalar, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
Check.typeOf.object("matrix", matrix);
|
|
Check.typeOf.number("scalar", scalar);
|
|
Check.typeOf.object("result", result);
|
|
//>>includeEnd('debug');
|
|
|
|
result[0] = matrix[0] * scalar;
|
|
result[1] = matrix[1] * scalar;
|
|
result[2] = matrix[2] * scalar;
|
|
result[3] = matrix[3] * scalar;
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Computes the product of a matrix times a (non-uniform) scale, as if the scale were a scale matrix.
|
|
*
|
|
* @param {Matrix2} matrix The matrix on the left-hand side.
|
|
* @param {Cartesian2} scale The non-uniform scale on the right-hand side.
|
|
* @param {Matrix2} result The object onto which to store the result.
|
|
* @returns {Matrix2} The modified result parameter.
|
|
*
|
|
*
|
|
* @example
|
|
* // Instead of Cesium.Matrix2.multiply(m, Cesium.Matrix2.fromScale(scale), m);
|
|
* Cesium.Matrix2.multiplyByScale(m, scale, m);
|
|
*
|
|
* @see Matrix2.fromScale
|
|
* @see Matrix2.multiplyByUniformScale
|
|
*/
|
|
Matrix2.multiplyByScale = function (matrix, scale, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
Check.typeOf.object("matrix", matrix);
|
|
Check.typeOf.object("scale", scale);
|
|
Check.typeOf.object("result", result);
|
|
//>>includeEnd('debug');
|
|
|
|
result[0] = matrix[0] * scale.x;
|
|
result[1] = matrix[1] * scale.x;
|
|
result[2] = matrix[2] * scale.y;
|
|
result[3] = matrix[3] * scale.y;
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Creates a negated copy of the provided matrix.
|
|
*
|
|
* @param {Matrix2} matrix The matrix to negate.
|
|
* @param {Matrix2} result The object onto which to store the result.
|
|
* @returns {Matrix2} The modified result parameter.
|
|
*/
|
|
Matrix2.negate = function (matrix, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
Check.typeOf.object("matrix", matrix);
|
|
Check.typeOf.object("result", result);
|
|
//>>includeEnd('debug');
|
|
|
|
result[0] = -matrix[0];
|
|
result[1] = -matrix[1];
|
|
result[2] = -matrix[2];
|
|
result[3] = -matrix[3];
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Computes the transpose of the provided matrix.
|
|
*
|
|
* @param {Matrix2} matrix The matrix to transpose.
|
|
* @param {Matrix2} result The object onto which to store the result.
|
|
* @returns {Matrix2} The modified result parameter.
|
|
*/
|
|
Matrix2.transpose = function (matrix, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
Check.typeOf.object("matrix", matrix);
|
|
Check.typeOf.object("result", result);
|
|
//>>includeEnd('debug');
|
|
|
|
var column0Row0 = matrix[0];
|
|
var column0Row1 = matrix[2];
|
|
var column1Row0 = matrix[1];
|
|
var column1Row1 = matrix[3];
|
|
|
|
result[0] = column0Row0;
|
|
result[1] = column0Row1;
|
|
result[2] = column1Row0;
|
|
result[3] = column1Row1;
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Computes a matrix, which contains the absolute (unsigned) values of the provided matrix's elements.
|
|
*
|
|
* @param {Matrix2} matrix The matrix with signed elements.
|
|
* @param {Matrix2} result The object onto which to store the result.
|
|
* @returns {Matrix2} The modified result parameter.
|
|
*/
|
|
Matrix2.abs = function (matrix, result) {
|
|
//>>includeStart('debug', pragmas.debug);
|
|
Check.typeOf.object("matrix", matrix);
|
|
Check.typeOf.object("result", result);
|
|
//>>includeEnd('debug');
|
|
|
|
result[0] = Math.abs(matrix[0]);
|
|
result[1] = Math.abs(matrix[1]);
|
|
result[2] = Math.abs(matrix[2]);
|
|
result[3] = Math.abs(matrix[3]);
|
|
|
|
return result;
|
|
};
|
|
|
|
/**
|
|
* Compares the provided matrices componentwise and returns
|
|
* <code>true</code> if they are equal, <code>false</code> otherwise.
|
|
*
|
|
* @param {Matrix2} [left] The first matrix.
|
|
* @param {Matrix2} [right] The second matrix.
|
|
* @returns {Boolean} <code>true</code> if left and right are equal, <code>false</code> otherwise.
|
|
*/
|
|
Matrix2.equals = function (left, right) {
|
|
return (
|
|
left === right ||
|
|
(defined(left) &&
|
|
defined(right) &&
|
|
left[0] === right[0] &&
|
|
left[1] === right[1] &&
|
|
left[2] === right[2] &&
|
|
left[3] === right[3])
|
|
);
|
|
};
|
|
|
|
/**
|
|
* @private
|
|
*/
|
|
Matrix2.equalsArray = function (matrix, array, offset) {
|
|
return (
|
|
matrix[0] === array[offset] &&
|
|
matrix[1] === array[offset + 1] &&
|
|
matrix[2] === array[offset + 2] &&
|
|
matrix[3] === array[offset + 3]
|
|
);
|
|
};
|
|
|
|
/**
|
|
* Compares the provided matrices componentwise and returns
|
|
* <code>true</code> if they are within the provided epsilon,
|
|
* <code>false</code> otherwise.
|
|
*
|
|
* @param {Matrix2} [left] The first matrix.
|
|
* @param {Matrix2} [right] The second matrix.
|
|
* @param {Number} [epsilon=0] The epsilon to use for equality testing.
|
|
* @returns {Boolean} <code>true</code> if left and right are within the provided epsilon, <code>false</code> otherwise.
|
|
*/
|
|
Matrix2.equalsEpsilon = function (left, right, epsilon) {
|
|
epsilon = defaultValue(epsilon, 0);
|
|
return (
|
|
left === right ||
|
|
(defined(left) &&
|
|
defined(right) &&
|
|
Math.abs(left[0] - right[0]) <= epsilon &&
|
|
Math.abs(left[1] - right[1]) <= epsilon &&
|
|
Math.abs(left[2] - right[2]) <= epsilon &&
|
|
Math.abs(left[3] - right[3]) <= epsilon)
|
|
);
|
|
};
|
|
|
|
/**
|
|
* An immutable Matrix2 instance initialized to the identity matrix.
|
|
*
|
|
* @type {Matrix2}
|
|
* @constant
|
|
*/
|
|
Matrix2.IDENTITY = Object.freeze(new Matrix2(1.0, 0.0, 0.0, 1.0));
|
|
|
|
/**
|
|
* An immutable Matrix2 instance initialized to the zero matrix.
|
|
*
|
|
* @type {Matrix2}
|
|
* @constant
|
|
*/
|
|
Matrix2.ZERO = Object.freeze(new Matrix2(0.0, 0.0, 0.0, 0.0));
|
|
|
|
/**
|
|
* The index into Matrix2 for column 0, row 0.
|
|
*
|
|
* @type {Number}
|
|
* @constant
|
|
*
|
|
* @example
|
|
* var matrix = new Cesium.Matrix2();
|
|
* matrix[Cesium.Matrix2.COLUMN0ROW0] = 5.0; // set column 0, row 0 to 5.0
|
|
*/
|
|
Matrix2.COLUMN0ROW0 = 0;
|
|
|
|
/**
|
|
* The index into Matrix2 for column 0, row 1.
|
|
*
|
|
* @type {Number}
|
|
* @constant
|
|
*
|
|
* @example
|
|
* var matrix = new Cesium.Matrix2();
|
|
* matrix[Cesium.Matrix2.COLUMN0ROW1] = 5.0; // set column 0, row 1 to 5.0
|
|
*/
|
|
Matrix2.COLUMN0ROW1 = 1;
|
|
|
|
/**
|
|
* The index into Matrix2 for column 1, row 0.
|
|
*
|
|
* @type {Number}
|
|
* @constant
|
|
*
|
|
* @example
|
|
* var matrix = new Cesium.Matrix2();
|
|
* matrix[Cesium.Matrix2.COLUMN1ROW0] = 5.0; // set column 1, row 0 to 5.0
|
|
*/
|
|
Matrix2.COLUMN1ROW0 = 2;
|
|
|
|
/**
|
|
* The index into Matrix2 for column 1, row 1.
|
|
*
|
|
* @type {Number}
|
|
* @constant
|
|
*
|
|
* @example
|
|
* var matrix = new Cesium.Matrix2();
|
|
* matrix[Cesium.Matrix2.COLUMN1ROW1] = 5.0; // set column 1, row 1 to 5.0
|
|
*/
|
|
Matrix2.COLUMN1ROW1 = 3;
|
|
|
|
Object.defineProperties(Matrix2.prototype, {
|
|
/**
|
|
* Gets the number of items in the collection.
|
|
* @memberof Matrix2.prototype
|
|
*
|
|
* @type {Number}
|
|
*/
|
|
length: {
|
|
get: function () {
|
|
return Matrix2.packedLength;
|
|
},
|
|
},
|
|
});
|
|
|
|
/**
|
|
* Duplicates the provided Matrix2 instance.
|
|
*
|
|
* @param {Matrix2} [result] The object onto which to store the result.
|
|
* @returns {Matrix2} The modified result parameter or a new Matrix2 instance if one was not provided.
|
|
*/
|
|
Matrix2.prototype.clone = function (result) {
|
|
return Matrix2.clone(this, result);
|
|
};
|
|
|
|
/**
|
|
* Compares this matrix to the provided matrix componentwise and returns
|
|
* <code>true</code> if they are equal, <code>false</code> otherwise.
|
|
*
|
|
* @param {Matrix2} [right] The right hand side matrix.
|
|
* @returns {Boolean} <code>true</code> if they are equal, <code>false</code> otherwise.
|
|
*/
|
|
Matrix2.prototype.equals = function (right) {
|
|
return Matrix2.equals(this, right);
|
|
};
|
|
|
|
/**
|
|
* Compares this matrix to the provided matrix componentwise and returns
|
|
* <code>true</code> if they are within the provided epsilon,
|
|
* <code>false</code> otherwise.
|
|
*
|
|
* @param {Matrix2} [right] The right hand side matrix.
|
|
* @param {Number} [epsilon=0] The epsilon to use for equality testing.
|
|
* @returns {Boolean} <code>true</code> if they are within the provided epsilon, <code>false</code> otherwise.
|
|
*/
|
|
Matrix2.prototype.equalsEpsilon = function (right, epsilon) {
|
|
return Matrix2.equalsEpsilon(this, right, epsilon);
|
|
};
|
|
|
|
/**
|
|
* Creates a string representing this Matrix with each row being
|
|
* on a separate line and in the format '(column0, column1)'.
|
|
*
|
|
* @returns {String} A string representing the provided Matrix with each row being on a separate line and in the format '(column0, column1)'.
|
|
*/
|
|
Matrix2.prototype.toString = function () {
|
|
return (
|
|
"(" +
|
|
this[0] +
|
|
", " +
|
|
this[2] +
|
|
")\n" +
|
|
"(" +
|
|
this[1] +
|
|
", " +
|
|
this[3] +
|
|
")"
|
|
);
|
|
};
|
|
export default Matrix2;
|