1 files changed, 51 insertions, 0 deletions
diff --git a/hw4/src/sceneIO_light.cpp b/hw4/src/sceneIO_light.cpp
new file mode 100644
index 0000000..bb9e399
--- /dev/null
+++ b/hw4/src/sceneIO_light.cpp
@@ -0,0 +1,51 @@
+/******************************************************************/
+/* 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 "errorMessage.h"
+#include "random_number.h"
+
+#include "sceneIO_core.h"
+#include "sceneIO_basis.h"
+#include "sceneIO_light.h"
+#include "sceneIO_material.h"
+#include "sceneIO_geometry.h"
+
+#include "directionalLightsource.h"
+
+static std::shared_ptr<const lightsource_base> importDirectionalLight(const XMLNode& node)
+{
+  // get properties
+  vec3d direction = getVec3d(node, "direction", vec3d(0.0f, 0.0f, 1.0f));
+  color power = getColor(node, "power", color(1.0f, 1.0f, 1.0f));
+                                
+  // Done.
+  return std::shared_ptr<const lightsource_base>( new directionalLightsource( direction, power));
+}
+
+
+std::shared_ptr<const lightsource_base> importLight(const XMLNode& node, nodeCache<boundedPrimitive>& shape_cache, nodeCache<shader_base>& shader_cache, nodeCache<texture_base>& texture_cache, const std::string& rootDir)
+{
+  // sanity check
+  assert(node.name() == "light");
+
+  // get light source type
+  std::string type = getString(node, "type", "directional");
+ 
+  // create light source
+  std::shared_ptr<const lightsource_base> ls;
+  if(type == "directional") ls = importDirectionalLight(node);
+  else errorMessage("Unknown light source type (%s)", type.c_str());
+
+  // Done.
+  return ls;
+}
+
+
+