Added fromWorldN to transform

RayTracer/tools/Transformation.cpp

@@ -4,6 +4,7 @@ namespace util {
 util::Transformation::Transformation(const Mat4& matrix)
     : toWorld(matrix),
       fromWorld(matrix.invertFull()),
-      toWorldN(matrix.invertFull().transpose()) {
+      toWorldN(matrix.invertFull().transpose()),
+      fromWorldN(matrix.invertFull().invertFull().transpose()) {
 }
 }  // namespace util

RayTracer/tools/Transformation.h

@@ -5,6 +5,6 @@ namespace util {
 class Transformation {
    public:
 	Transformation(const Mat4& matrix);
-	const Mat4 toWorld, fromWorld, toWorldN;
+	const Mat4 toWorld, fromWorld, toWorldN, fromWorldN;
 };
 }  // namespace util
\ No newline at end of file