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diff --git a/hw6/src/shadingFrameTransformation.cpp b/hw6/src/shadingFrameTransformation.cpp
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+/******************************************************************/
+/* This file is part of the homework assignments for CSCI-427/527 */
+/* at The College of William & Mary and authored by Pieter Peers. */
+/* No part of this file, whether altered or in original form, can */
+/* be distributed or used outside the context of CSCI-427/527     */
+/* without consent of either the College of William & Mary or     */
+/* Pieter Peers.                                                  */
+/******************************************************************/
+#include "shadingFrameTransformation.h"
+
+
+//////////////////
+// Constructors //
+//////////////////
+shadingFrameTransformation::shadingFrameTransformation(const std::shared_ptr<const shader_base>& shader)
+  : shader_base()
+{
+  _shader = shader;
+}
+
+
+/////////////
+// Methods //
+/////////////
+color shadingFrameTransformation::shade(const intersectionPoint& ip, const vec3d& light_dir) const 
+{
+  // transform to local shading frame
+  intersectionPoint localIp(ip);
+  localIp.inverseTransformShadingFrame( _transformation(ip.textureCoordinate()) );
+
+  // Done.
+  return _shader->shade(localIp, light_dir);
+}
+
+
+color shadingFrameTransformation::reflectance(const intersectionPoint& ip, const vec3d& light_dir) const
+{
+  // transform to local shading frame
+  intersectionPoint localIp(ip);
+  localIp.inverseTransformShadingFrame( _transformation(ip.textureCoordinate()) );
+
+  // Done.
+  return _shader->reflectance(localIp, light_dir);
+}
+
+
+brdfSample shadingFrameTransformation::sample(const intersectionPoint& ip, float r1, float r2) const
+{
+  // transform to local shading frame
+  intersectionPoint localIp(ip);
+  transformation3d ct = _transformation(ip.textureCoordinate());
+  localIp.inverseTransformShadingFrame(ct);
+
+  //get sample (in local shading frame)
+  brdfSample sample = _shader->sample(localIp, r1, r2);
+
+  // transform to global shading frame
+  return sample.transform(ct);
+}
+
+
+float shadingFrameTransformation::reflectivity(const intersectionPoint& ip) const
+{
+  return _shader->reflectivity(ip);
+}
+
+
+color shadingFrameTransformation::emittance(const intersectionPoint& ip) const
+{
+  // transform to local shading frame
+  intersectionPoint localIp(ip);
+  localIp.inverseTransformShadingFrame( _transformation(ip.textureCoordinate()) );
+
+  // Done.
+  return _shader->emittance(localIp);
+}
+
+
+shaderProperties shadingFrameTransformation::properties(const intersectionPoint& ip) const
+{
+  return _shader->properties(ip);
+}