1 files changed, 99 insertions, 0 deletions
diff --git a/hw6/src/sceneIO_core.cpp b/hw6/src/sceneIO_core.cpp
new file mode 100644
index 0000000..123287e
--- /dev/null
+++ b/hw6/src/sceneIO_core.cpp
@@ -0,0 +1,99 @@
+/******************************************************************/
+/* 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 <string>
+#include <cstdlib>
+
+#include "sceneIO_core.h"
+#include "errorMessage.h"
+
+color getColor(const XMLNode& node, const std::string& name, const color& default_value)
+{
+  std::string value = node.attribute(name);
+
+  // if defined, process..
+  if(value != "") 
+  {
+    color result;
+    int s = sscanf(value.c_str(), "%f %f %f", &result.r, &result.g, &result.b);
+
+    // check if only 1 value is given or 3.
+    if(s == 1) return color(result.r, result.r, result.r);
+    else if(s == 3) return result;
+    else errorMessage("Failed to parse color value (%s)", value.c_str());
+  }
+
+  // else return default
+  return default_value;
+}
+
+
+vec3d getVec3d(const XMLNode& node, const std::string& name, const vec3d& default_value)
+{
+  std::string value = node.attribute(name);
+
+  // if defined, process..
+  if(value != "") 
+  {
+    vec3d result;
+    int s = sscanf(value.c_str(), "%f %f %f", &result.x, &result.y, &result.z);
+
+    // check if only 1 value is given or 3.
+    if(s == 1) return vec3d(result.x, result.x, result.x);
+    else if(s == 3) return result;
+    else errorMessage("Failed to parse vec3d value (%s)", value.c_str());
+  }
+
+  // else return default
+  return default_value;
+}
+
+
+vec2d getVec2d(const XMLNode& node, const std::string& name, const vec2d& default_value)
+{
+  std::string value = node.attribute(name);
+
+  // if defined, process..
+  if(value != "") 
+  {
+    vec2d result;
+    int s = sscanf(value.c_str(), "%f %f", &result.x, &result.y);
+
+    // check if only 1 value is given or 2.
+    if(s == 1) return vec2d(result.x, result.x);
+    else if(s == 2) return result;
+    else errorMessage("Failed to parse vec2d value (%s)", value.c_str());
+  }
+
+  // else returnd default
+  return default_value;
+}
+
+
+std::string getString(const XMLNode& node, const std::string& name, const std::string& default_value)
+{
+  std::string value = node.attribute(name);
+  if(value != "") return std::string(value);
+  else return default_value;
+}
+
+
+float getFloat(const XMLNode& node, const std::string& name, float default_value)
+{
+  std::string value = node.attribute(name);
+if(value != "") return atof(value.c_str());
+  else return default_value;
+}
+
+
+unsigned int getInteger(const XMLNode& node, const std::string& name, unsigned int default_value)
+{
+  std::string value = node.attribute(name);
+if(value != "") return atoi(value.c_str());
+  else return default_value;
+}