source/lighting.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgl
   4 Copyright © 2008  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include "light.h"
   9 #include "lighting.h"
  10 #include "misc.h"
  11
  12 namespace Msp {
  13 namespace GL {
  14
  15 Lighting::Lighting():
  16         ambient(0.2)
  17 { }
  18
  19 void Lighting::set_ambient(const Color &a)
  20 {
  21         ambient=a;
  22 }
  23
  24 void Lighting::attach(unsigned i, const Light &l)
  25 {
  26         if(i>=lights.size())
  27                 lights.resize(i+1);
  28
  29         lights[i]=&l;
  30 }
  31
  32 void Lighting::detach(unsigned i)
  33 {
  34         if(i>=lights.size())
  35                 return;
  36
  37         lights[i]=0;
  38 }
  39
  40 void Lighting::bind() const
  41 {
  42         if(current!=this)
  43         {
  44                 enable(LIGHTING);
  45                 glLightModelfv(GL_LIGHT_MODEL_AMBIENT, &ambient.r);
  46                 for(unsigned i=0; i<lights.size(); ++i)
  47                         if(lights[i])
  48                                 lights[i]->bind_to(i);
  49                 current=this;
  50         }
  51 }
  52
  53 void Lighting::unbind()
  54 {
  55         if(current)
  56         {
  57                 for(unsigned i=0; i<current->lights.size(); ++i)
  58                         if(current->lights[i])
  59                         {
  60                                 Light::activate(i);
  61                                 Light::unbind();
  62                         }
  63                 disable(LIGHTING);
  64                 current=0;
  65         }
  66 }
  67
  68 const Lighting *Lighting::current=0;
  69
  70 } // namespace GL
  71 } // namespace Msp