source/vertexarraybuilder.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgl
   4 Copyright © 2007  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include "vertexarray.h"
   9 #include "vertexarraybuilder.h"
  10
  11 namespace Msp {
  12 namespace GL {
  13
  14 VertexArrayBuilder::VertexArrayBuilder(VertexArray &a):
  15         data(a.data),
  16         array(a)
  17 { }
  18
  19 VertexArrayBuilder::~VertexArrayBuilder()
  20 {
  21         array.update_data();
  22 }
  23
  24 void VertexArrayBuilder::vertex_(float x, float y, float z, float w)
  25 {
  26         for(uint fmt=array.get_format(); fmt; fmt>>=4)
  27         {
  28                 uint size=(fmt&3)+1;
  29                 switch(fmt&12)
  30                 {
  31                 case 0:
  32                         data.push_back(x);
  33                         data.push_back(y);
  34                         if(size>=3) data.push_back(z);
  35                         if(size>=4) data.push_back(w);
  36                         break;
  37                 case 4:
  38                         data.push_back(nx);
  39                         data.push_back(ny);
  40                         data.push_back(nz);
  41                         break;
  42                 case 8:
  43                         data.push_back(ts);
  44                         if(size>=2) data.push_back(tt);
  45                         if(size>=3) data.push_back(tr);
  46                         if(size>=4) data.push_back(tq);
  47                         break;
  48                 case 12:
  49                         if(size==1)
  50                         {
  51                                 union { ubyte c[4]; float f; } u;
  52                                 u.c[0]=(ubyte)(cr*255);
  53                                 u.c[1]=(ubyte)(cg*255);
  54                                 u.c[2]=(ubyte)(cb*255);
  55                                 u.c[3]=(ubyte)(ca*255);
  56                                 data.push_back(u.f);
  57                         }
  58                         else
  59                         {
  60                                 data.push_back(cr);
  61                                 data.push_back(cg);
  62                                 data.push_back(cb);
  63                                 if(size>=4) data.push_back(ca);
  64                         }
  65                         break;
  66                 }
  67         }
  68 }
  69
  70 } // namespace GL
  71 } // namespace Msp