From 277252ef775b848bdc3c22d658f5a7d4c08903cb Mon Sep 17 00:00:00 2001
From: Josh Holtrop <jholtrop+git@gmail.com>
Date: Fri, 23 Jan 2009 00:27:29 +0000
Subject: [PATCH] added transformation operations to util/Transform

git-svn-id: svn://anubis/fart/trunk@31 7f9b0f55-74a9-4bce-be96-3c2cd072584d
---
 util/Transform.cc | 18 ++++++++++++++++++
 util/Transform.h  |  6 ++++++
 2 files changed, 24 insertions(+)

diff --git a/util/Transform.cc b/util/Transform.cc
index ec1f8ff..3e7be63 100644
--- a/util/Transform.cc
+++ b/util/Transform.cc
@@ -53,3 +53,21 @@ void Transform::scale(double xs, double ys, double zs)
     t[2][2] = zs;
     m_matrix *= t;
 }
+
+Vector operator*(Transform & t, const Vector & v)
+{
+    return t.getMatrix() * v;
+}
+
+Vector operator%(Transform & t, const Vector & v)
+{
+    return t.getMatrix() % v;
+}
+
+Ray operator*(Transform & t, const Ray & r)
+{
+    Vector newPosition = t.getMatrix() * r.getOrigin();
+    Vector newDirection = t.getMatrix() % r.getDirection();
+    Ray res(newPosition, newDirection);
+    return res;
+}
diff --git a/util/Transform.h b/util/Transform.h
index 38a6242..f11d4c5 100644
--- a/util/Transform.h
+++ b/util/Transform.h
@@ -3,6 +3,8 @@
 #define TRANSFORM_H TRANSFORM_H
 
 #include "Matrix.h"
+#include "Ray.h"
+#include "Vector.h"
 #include <stack>
 
 class Transform
@@ -18,5 +20,9 @@ class Transform
         Matrix m_matrix;
 };
 
+Vector operator*(Transform & t, const Vector & v);
+Vector operator%(Transform & t, const Vector & v);
+Ray operator*(Transform & t, const Ray & r);
+
 #endif