shapes returning transformed normals

git-svn-id: svn://anubis/fart/trunk@60 7f9b0f55-74a9-4bce-be96-3c2cd072584d

shapes/Plane.cc

@@ -46,5 +46,6 @@ Shape::IntersectList Plane::intersect(const Ray & ray)
 Vector Plane::getNormalAt(const Vector & pt)
 {
     Vector normal(m_a, m_b, m_c);
-    return normal.normalize();
+    normal.normalize();
+    return m_transform.transform_normal(normal);
 }

shapes/Sphere.cc

@@ -41,5 +41,7 @@ Vector Sphere::getNormalAt(const Vector & pt)
     Vector pt_inv = m_inverse.transform_point(pt);
 
     Vector normal = pt_inv;
-    return normal.normalize();
+    normal.normalize();
+
+    return m_transform.transform_normal(normal);
 }