source/lighting.cpp

   1 #include "light.h"
   2 #include "lighting.h"
   3 #include "misc.h"
   4
   5 namespace Msp {
   6 namespace GL {
   7
   8 Lighting::Lighting():
   9         ambient(0.2)
  10 { }
  11
  12 void Lighting::set_ambient(const Color &a)
  13 {
  14         ambient = a;
  15 }
  16
  17 void Lighting::attach(unsigned i, const Light &l)
  18 {
  19         if(i>=lights.size())
  20                 lights.resize(i+1);
  21
  22         lights[i] = &l;
  23 }
  24
  25 void Lighting::detach(unsigned i)
  26 {
  27         if(i>=lights.size())
  28                 return;
  29
  30         lights[i] = 0;
  31 }
  32
  33 void Lighting::bind() const
  34 {
  35         if(!set_current(this))
  36                 return;
  37
  38         enable(GL_LIGHTING);
  39         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, &ambient.r);
  40         for(unsigned i=0; i<lights.size(); ++i)
  41                 if(lights[i])
  42                         lights[i]->bind_to(i);
  43 }
  44
  45 void Lighting::unbind()
  46 {
  47         const Lighting *old = current();
  48         if(!set_current(0))
  49                 return;
  50
  51         for(unsigned i=0; i<old->lights.size(); ++i)
  52                 if(old->lights[i])
  53                         Light::unbind_from(i);
  54
  55         disable(GL_LIGHTING);
  56 }
  57
  58 } // namespace GL
  59 } // namespace Msp