f32/d3/vec3.go
func Vec3Sub(dest, v1, v2 Vec3) {
	dest[0] = v1[0] - v2[0]
	dest[1] = v1[1] - v2[1]
	dest[2] = v1[2] - v2[2]
}
func Vec3Sub(dest, v1, v2 Vec3) {
	dest[0] = v1[0] - v2[0]
	dest[1] = v1[1] - v2[1]
	dest[2] = v1[2] - v2[2]
}
// Vec3Sub performs a vector subtraction. dest = v1 - v2.
//
//     dest  [out]  The result vector.
//     v1    [in]   The base vector.
//     v2    [in]   The vector to subtract from v1.