arcade-physics
Version:
Use Arcade Physics without Phaser.
51 lines • 1.45 kB
JavaScript
;
/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2020 Photon Storm Ltd.
* @license {@link https://opensource.org/licenses/MIT|MIT License}
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.CheckMatrix = void 0;
/**
* Checks if an array can be used as a matrix.
*
* A matrix is a two-dimensional array (array of arrays), where all sub-arrays (rows)
* have the same length. There must be at least two rows. This is an example matrix:
*
* ```
* [
* [ 1, 1, 1, 1, 1, 1 ],
* [ 2, 0, 0, 0, 0, 4 ],
* [ 2, 0, 1, 2, 0, 4 ],
* [ 2, 0, 3, 4, 0, 4 ],
* [ 2, 0, 0, 0, 0, 4 ],
* [ 3, 3, 3, 3, 3, 3 ]
* ]
* ```
*
* @function Phaser.Utils.Array.Matrix.CheckMatrix
* @since 3.0.0
*
* @generic T
* @genericUse {T[][]} - [matrix]
*
* @param {T[][]} [matrix] - The array to check.
*
* @return {boolean} `true` if the given `matrix` array is a valid matrix.
*/
const CheckMatrix = matrix => {
if (!Array.isArray(matrix) || matrix.length < 2 || !Array.isArray(matrix[0])) {
return false;
}
// How long is the first row?
const size = matrix[0].length;
// Validate the rest of the rows are the same length
for (let i = 1; i < matrix.length; i++) {
if (matrix[i].length !== size) {
return false;
}
}
return true;
};
exports.CheckMatrix = CheckMatrix;
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