Vec3F

fun Vec3F(    x: Double = 0.0,     y: Double = 0.0,     z: Double = 0.0)
fun Vec3F(    x: Int = 0,     y: Int = 0,     z: Int = 0)
fun Vec3F(    x: Float = 0.0f,     y: Float = 0.0f,     z: Float = 0.0f)