1 files changed, 95 insertions, 0 deletions
diff --git a/hw6/src/texture_base.cpp b/hw6/src/texture_base.cpp
new file mode 100644
index 0000000..2a90146
--- /dev/null
+++ b/hw6/src/texture_base.cpp
@@ -0,0 +1,95 @@
+/******************************************************************/
+/* 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 "texture_base.h"
+
+
+//////////////////
+// Constructors //
+//////////////////
+texture_base::texture_base(bool repeat)
+  : image()
+{
+  _repeat = repeat;
+}
+
+texture_base::texture_base(const texture_base& src)
+  : image(src)
+{
+  _repeat = src._repeat;
+}
+
+
+///////////////
+// Operators //
+///////////////
+texture_base& texture_base::operator=(const texture_base& src)
+{
+  _assign(src);
+  return *this;
+}
+
+
+/////////////////////
+// Private Methods //
+/////////////////////
+void texture_base::_assign(const texture_base& src)
+{
+  image::_assign(src);
+  _repeat = src._repeat;
+}
+
+
+static void repeatCoordinate(signed int& p, signed int maxCoord)
+{
+  if(p < 0) p = 0;
+  else if(p >= maxCoord) p = maxCoord-1;
+}
+
+static void wrapCoordinate(signed int& p, signed int maxCoord)
+{
+  if(p < 0) p = (maxCoord  + (p % maxCoord)) % maxCoord;
+  else if(p >= maxCoord) p %= maxCoord;
+}
+
+color& texture_base::_at(signed int x, signed int y)
+{
+  // repeat
+  if(_repeat) 
+  {
+    repeatCoordinate(x, width());
+    repeatCoordinate(y, height());
+  }
+  // wrap
+  else {
+    wrapCoordinate(x, width());
+    wrapCoordinate(y, height());
+  }
+
+  // get value
+  return image::operator()(x,y);
+}
+
+
+const color& texture_base::_at(signed int x, signed int y) const
+{
+  // repeat
+  if(_repeat) 
+  {
+    repeatCoordinate(x, width());
+    repeatCoordinate(y, height());
+  }
+  // wrap
+  else {
+    wrapCoordinate(x, width());
+    wrapCoordinate(y, height());
+  }
+
+  // get value
+  return image::operator()(x,y);
+}