f32/d3/vec3.go
func (v Vec3) Assign(v1 Vec3) {
	v[0] = v1[0]
	v[1] = v1[1]
	v[2] = v1[2]
}
func (v Vec3) Assign(v1 Vec3) {
	v[0] = v1[0]
	v[1] = v1[1]
	v[2] = v1[2]
}
// Assign assign the component of v1 to v. v = v1