working mouse picking

include/Defines.h

@@ -135,4 +135,12 @@ typedef Mat4<float> Mat4f;
 typedef Mat4<int> Mat4i;
 typedef Mat4<double> Mat4d;
 
+template<typename T>
+inline bool operator==(const Mat4<T>& mat, const Mat4<T>& other) {
+	return mat.x0 == other.x0 && mat.y0 == other.y0 && mat.z0 == other.z0 && mat.w0 == other.w0 &&
+		mat.x1 == other.x1 && mat.y1 == other.y1 && mat.z1 == other.z1 && mat.w1 == other.w1 &&
+		mat.x2 == other.x2 && mat.y2 == other.y2 && mat.z2 == other.z2 && mat.w2 == other.w2 &&
+		mat.x3 == other.x3 && mat.y3 == other.y3 && mat.z3 == other.z3 && mat.w3 == other.w3;
+}
+
 } // namespace td