Function mat4Multiply

src/math/index.ts:185–194

(a: Mat4, b: Mat4)

}

export function mat4Multiply(a: Mat4, b: Mat4): Mat4 {
  const out = new Array(16).fill(0);
  for (let col = 0; col < 4; col++) {
    for (let row = 0; row < 4; row++) {
      out[col * 4 + row] = a[row] * b[col * 4] + a[4 + row] * b[col * 4 + 1] +
                            a[8 + row] * b[col * 4 + 2] + a[12 + row] * b[col * 4 + 3];
    }
  }
  return out;
}

export function mat4Translate(m: Mat4, v: Vec3): Mat4 {
  const out = [...m];