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(!set_current(this))
  43                 return;
  44
  45         enable(GL_LIGHTING);
  46         glLightModelfv(GL_LIGHT_MODEL_AMBIENT, &ambient.r);
  47         for(unsigned i=0; i<lights.size(); ++i)
  48                 if(lights[i])
  49                         lights[i]->bind_to(i);
  50 }
  51
  52 void Lighting::unbind()
  53 {
  54         const Lighting *old = current();
  55         if(!set_current(0))
  56                 return;
  57
  58         for(unsigned i=0; i<old->lights.size(); ++i)
  59                 if(old->lights[i])
  60                         Light::unbind_from(i);
  61
  62         disable(GL_LIGHTING);
  63 }
  64
  65 } // namespace GL
  66 } // namespace Msp