// Left multiplies the current top of the matrix by the
// argument.
func (ms *MatStack) LeftMul(m mgl64.Mat4) {
(*ms)[len(*ms)-1] = m.Mul4((*ms)[len(*ms)-1])
}
// Left multiplies the current top of the matrix by the
// argument.
func (ms *MatStack) LeftMul(m mgl64.Mat4) {
(*ms)[len(*ms)-1] = m.Mul4((*ms)[len(*ms)-1])
}
