wip card clicking

src/game/Global.cpp

@@ -171,3 +171,9 @@ Mat4 Mat4::Transpose()
     bx::mtxTranspose(result.M, M);
     return result;
 }
+Vec4 Mat4::Mul(const Vec4& vec)
+{
+    Vec4 out;
+    bx::vec4MulMtx(&out.x, &vec.x, &M[0]);
+    return out;
+}