@phaserjs/phaser
Version:
7 lines (6 loc) • 1.06 kB
JavaScript
import { Matrix4 } from "./Matrix4";
export function Mat4Multiply(a, b, out = new Matrix4()) {
const [a00, a01, a02, a03, a10, a11, a12, a13, a20, a21, a22, a23, a30, a31, a32, a33] = a.data;
const [b00, b01, b02, b03, b10, b11, b12, b13, b20, b21, b22, b23, b30, b31, b32, b33] = b.data;
return out.set(b00 * a00 + b01 * a10 + b02 * a20 + b03 * a30, b01 * a01 + b01 * a11 + b02 * a21 + b03 * a31, b02 * a02 + b01 * a12 + b02 * a22 + b03 * a32, b03 * a03 + b01 * a13 + b02 * a23 + b03 * a33, b10 * a00 + b11 * a10 + b12 * a20 + b13 * a30, b10 * a01 + b11 * a11 + b12 * a21 + b13 * a31, b10 * a02 + b11 * a12 + b12 * a22 + b13 * a32, b10 * a03 + b11 * a13 + b12 * a23 + b13 * a33, b20 * a00 + b21 * a10 + b22 * a20 + b23 * a30, b20 * a01 + b21 * a11 + b22 * a21 + b23 * a31, b20 * a02 + b21 * a12 + b22 * a22 + b23 * a32, b20 * a03 + b21 * a13 + b22 * a23 + b23 * a33, b30 * a00 + b31 * a10 + b32 * a20 + b33 * a30, b30 * a01 + b31 * a11 + b32 * a21 + b33 * a31, b30 * a02 + b31 * a12 + b32 * a22 + b33 * a32, b30 * a03 + b31 * a13 + b32 * a23 + b33 * a33);
}