1 files changed, 47 insertions, 0 deletions
diff --git a/hw5/src/bumpMap.cpp b/hw5/src/bumpMap.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 <algorithm>
+#include "bumpMap.h"
+#include "coordinateTransform.h"
+
+//////////////////
+// Constructors //
+//////////////////
+bumpMap::bumpMap(const std::shared_ptr<const texture_base>& map, float scale, unsigned int channel, const std::shared_ptr<const shader_base>& shader)
+  : shadingFrameTransformation(shader)
+{
+  _map = map;
+  _scale = scale;
+  _channel = std::max(channel, 2u);
+}
+
+/////////////
+// Methods //
+/////////////
+transformation3d bumpMap::_transformation(const vec2d& textureCoord) const
+{
+  // HW5-BONUS: Implement a bump map. The bump map specifies a 'bump' as a an offset in the 
+  //      Z direction (i.e., which aligns to N in the local shading frame). The variable
+  //      '_channel' indicates which channel in the '_map' encodes the height offset.
+  //      The variable '_scale' determines the relative height of the bump with respect to
+  //      the texel size. I.e., the height of a bump is _map(u,v)*_scale.  From the bump
+  //      you need to compute the new surface normal, and from this the shading frame
+  //      transformation.
+  // Modifies: nothing
+  // Returns: transformation3d
+  return transformation3d();
+}
+
+
+void bumpMap::_print(std::ostream& s) const
+{
+  s << "bumpMap (" << _scale << " x " << *_map << "[" << _channel << "]) -> {" << *_shader << "}";
+}
+