f32/d3/vec3.go
func Vec3Add(dest, v1, v2 Vec3) {
	dest[0] = v1[0] + v2[0]
	dest[1] = v1[1] + v2[1]
	dest[2] = v1[2] + v2[2]
}
func Vec3Add(dest, v1, v2 Vec3) {
	dest[0] = v1[0] + v2[0]
	dest[1] = v1[1] + v2[1]
	dest[2] = v1[2] + v2[2]
}
// Vec3Add performs a vector addition. dest = v1 + v2
//
//     dest   [out] The result vector.
//     v1     [in]  The base vector.
//     v2     [in]  The vector to add to v1.