code: func (m1 Mat4) Mul(c float64) Mat4 {
  	return Mat4{m1[0] * c, m1[1] * c, m1[2] * c, m1[3] * c, m1[4] * c, m1[5] * c, m1[6] * c, m1[7] * c, m1[8] * c, m1[9] * c, m1[10] * c, m1[11] * c, m1[12] * c, m1[13] * c, m1[14] * c, m1[15] * c}
  }
docs: // Mul performs a scalar multiplcation of the matrix. This is equivalent to iterating
  // over every element of the matrix and multiply it by c.