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TransposeMatrix.js
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40 lines (33 loc) · 1.03 KB
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/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2018 Photon Storm Ltd.
* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
// Transposes the elements of the given matrix (array of arrays).
// The transpose of a matrix is a new matrix whose rows are the columns of the original.
/**
* [description]
*
* @function Phaser.Utils.Array.Matrix.TransposeMatrix
* @since 3.0.0
*
* @param {array} array - The array matrix to transpose.
*
* @return {array} A new array matrix which is a transposed version of the given array.
*/
var TransposeMatrix = function (array)
{
var sourceRowCount = array.length;
var sourceColCount = array[0].length;
var result = new Array(sourceColCount);
for (var i = 0; i < sourceColCount; i++)
{
result[i] = new Array(sourceRowCount);
for (var j = sourceRowCount - 1; j > -1; j--)
{
result[i][j] = array[j][i];
}
}
return result;
};
module.exports = TransposeMatrix;