Method scale

packages/melonjs/src/math/matrix3d.ts:620–639

* scale the matrix * @param x - a number representing the abscissa of the scaling vector. * @param [y] - a number representing the ordinate of the scaling vector. * @param [z] - a number representing the depth vector * @returns Reference to this object for method chaining

(x: number, y = x, z = 1)

	 * @returns Reference to this object for method chaining
	 */
	scale(x: number, y = x, z = 1) {
		const a = this.val;

		a[0] = a[0] * x;
		a[1] = a[1] * x;
		a[2] = a[2] * x;
		a[3] = a[3] * x;

		a[4] = a[4] * y;
		a[5] = a[5] * y;
		a[6] = a[6] * y;
		a[7] = a[7] * y;

		a[8] = a[8] * z;
		a[9] = a[9] * z;
		a[10] = a[10] * z;
		a[11] = a[11] * z;

		return this;
	}

	/**
	 * adds a 2D scaling transformation.