f32/d2/vec2.go
func Vec2SAdd(dest, v1, v2 Vec2, s float32) {
	dest[0] = v1[0] + v2[0]*s
	dest[1] = v1[1] + v2[1]*s
}
func Vec2SAdd(dest, v1, v2 Vec2, s float32) {
	dest[0] = v1[0] + v2[0]*s
	dest[1] = v1[1] + v2[1]*s
}
// Vec2SAdd performs a scaled vector addition. dest = v1 + (v2 * s)
//
//     dest   [out] The result vector.
//     v1     [in]  The base vector.
//     v1     [in]  The vector to scale and add to v1.
//     s      [in]  The amount to scale v2 by before adding to v1.