return Vector2(vec[0], vec[1]);
}
-inline Vector4 promote(const Vector3& vec, Scalar extra = 1.0)
+inline Vector4 promote(const Vector3& vec, Scalar extra = 0.0)
{
return Vector4(vec[0], vec[1], vec[2], extra);
}
-inline Vector3 promote(const Vector2& vec, Scalar extra = 1.0)
+inline Vector3 promote(const Vector2& vec, Scalar extra = 0.0)
{
return Vector3(vec[0], vec[1], extra);
}
+template <typename R, typename P>
+inline R convert(const P& p)
+{
+ return R(p);
+}
+
+template <>
+inline Vector3 convert<Vector3,Vector4>(const Vector4& vec)
+{
+ return Vector3(vec[0], vec[1], vec[2]);
+}
+
+template <>
+inline Vector2 convert<Vector2,Vector3>(const Vector3& vec)
+{
+ return Vector2(vec[0], vec[1]);
+}
+
+template <>
+inline Vector4 convert<Vector4,Vector3>(const Vector3& vec)
+{
+ return Vector4(vec[0], vec[1], vec[2], SCALAR(0.0));
+}
+
+template <>
+inline Vector3 convert<Vector3,Vector2>(const Vector2& vec)
+{
+ return Vector3(vec[0], vec[1], SCALAR(0.0));
+}
+
+template <typename P>
+struct cast
+{
+ cast(const P& p) : param(p) {}
+ template <typename R>
+ operator R() { return convert<R,P>(param); }
+private:
+ const P& param;
+};
+
+
const Scalar EPSILON = SCALAR(0.000001);