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         if(current()==this)
  24                 l.bind_to(i);
  25 }
  26
  27 void Lighting::detach(unsigned i)
  28 {
  29         if(i>=lights.size())
  30                 return;
  31
  32         lights[i] = 0;
  33         if(current()==this)
  34                 Light::unbind_from(i);
  35 }
  36
  37 void Lighting::bind() const
  38 {
  39         if(!set_current(this))
  40                 return;
  41
  42         enable(GL_LIGHTING);
  43         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, &ambient.r);
  44         for(unsigned i=0; i<lights.size(); ++i)
  45                 if(lights[i])
  46                         lights[i]->bind_to(i);
  47 }
  48
  49 void Lighting::unbind()
  50 {
  51         const Lighting *old = current();
  52         if(!set_current(0))
  53                 return;
  54
  55         for(unsigned i=0; i<old->lights.size(); ++i)
  56                 if(old->lights[i])
  57                         Light::unbind_from(i);
  58
  59         disable(GL_LIGHTING);
  60 }
  61
  62 } // namespace GL
  63 } // namespace Msp