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diff --git a/hw6/src/sceneIO_transformation3d.cpp b/hw6/src/sceneIO_transformation3d.cpp
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+++ b/hw6/src/sceneIO_transformation3d.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 <cassert>
+#include "sceneIO_core.h"
+#include "sceneIO_transformation3d.h"
+
+#include "rotationX3d.h"
+#include "rotationY3d.h"
+#include "rotationZ3d.h"
+#include "rotation3d.h"
+#include "translation3d.h"
+#include "scale3d.h"
+
+#include "errorMessage.h"
+
+static transformation3d importRotationX(const XMLNode& node)
+{
+  return rotationX3d(getFloat(node, "angle", 0.0f));
+}
+
+static transformation3d importRotationY(const XMLNode& node)
+{
+  return rotationY3d(getFloat(node, "angle", 0.0f));
+}
+
+static transformation3d importRotationZ(const XMLNode& node)
+{
+  return rotationZ3d(getFloat(node, "angle", 0.0f));
+}
+
+static transformation3d importRotationAxis(const XMLNode& node)
+{
+  return rotation3d(getFloat(node, "angle", 0.0f), 
+                    getVec3d(node, "axis", vec3d(0.0f, 0.0f, 1.0f)));
+}
+
+static transformation3d importTranslation(const XMLNode& node)
+{
+  return translation3d(getVec3d(node, "offset", vec3d(0.0f)));
+}
+
+static transformation3d importScale(const XMLNode& node)
+{
+  vec3d scale = getVec3d(node, "scale", vec3d(1.0f));
+  return scale3d(scale.x, scale.y, scale.z);
+}
+
+
+
+void importTransformation(const XMLNode& node, transformation3d& transform)
+{
+  // sanity check
+  assert(node.name() == "transformation");
+
+  // accumulate all child nodes
+  for(XMLNode childNode = node.firstChild(); childNode.isValid(); childNode++)
+  {
+    // get transformation type:
+    std::string type = childNode.name();
+
+    // parse
+    if(type == "rotationX") transform *= importRotationX(childNode);
+    else if(type == "rotationY") transform *= importRotationY(childNode);
+    else if(type == "rotationZ") transform *= importRotationZ(childNode);
+    else if(type == "rotation") transform *= importRotationAxis(childNode);
+    else if(type == "translation") transform *= importTranslation(childNode);
+    else if(type == "scale") transform *= importScale(childNode);
+    else errorMessage("Unknown transformation (%s)", type.c_str());
+  }
+
+  // Done.
+}
+
+