source/windingtest.cpp

   1 #include "windingtest.h"
   2
   3 namespace Msp {
   4 namespace GL {
   5
   6 void operator>>(const LexicalConverter &conv, FaceWinding &winding)
   7 {
   8         if(conv.get()=="CLOCKWISE")
   9                 winding = CLOCKWISE;
  10         else if(conv.get()=="COUNTERCLOCKWISE")
  11                 winding = COUNTERCLOCKWISE;
  12         else
  13                 throw InvalidParameterValue("Invalid FaceWinding");
  14 }
  15
  16 WindingTest::WindingTest():
  17         test(false),
  18         winding(COUNTERCLOCKWISE)
  19 { }
  20
  21 WindingTest::WindingTest(FaceWinding w):
  22         test(true),
  23         winding(w)
  24 { }
  25
  26 void WindingTest::bind() const
  27 {
  28         if(set_current(this))
  29         {
  30                 if(test)
  31                 {
  32                         glEnable(GL_CULL_FACE);
  33                         glFrontFace(winding);
  34                 }
  35                 else
  36                         glDisable(GL_CULL_FACE);
  37         }
  38 }
  39
  40 void WindingTest::unbind()
  41 {
  42         if(set_current(0))
  43                 glDisable(GL_CULL_FACE);
  44 }
  45
  46 WindingTest &WindingTest::clockwise()
  47 {
  48         static WindingTest test(CLOCKWISE);
  49         return test;
  50 }
  51
  52 WindingTest &WindingTest::counterclockwise()
  53 {
  54         static WindingTest test(COUNTERCLOCKWISE);
  55         return test;
  56 }
  57
  58 } // namespace GL
  59 } // namespace Msp