source/vertexarraybuilder.cpp

   1 /* $Id$
   2
   3 This file is part of libmspgl
   4 Copyright © 2007-2010  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         array(a)
  16 { }
  17
  18 void VertexArrayBuilder::vertex_(const Vector4 &v)
  19 {
  20         float *ptr = array.append();
  21         for(const unsigned char *c=array.get_format().begin(); c!=array.get_format().end(); ++c)
  22         {
  23                 unsigned sz = (*c&3)+1;
  24                 unsigned t = *c>>2;
  25                 switch(t)
  26                 {
  27                 case 0:
  28                         *ptr++ = v.x;
  29                         *ptr++ = v.y;
  30                         if(sz>=3) *ptr++ = v.z;
  31                         if(sz>=4) *ptr++ = v.w;
  32                         break;
  33                 case 1:
  34                         *ptr++ = nor.x;
  35                         *ptr++ = nor.y;
  36                         *ptr++ = nor.z;
  37                         break;
  38                 case 2:
  39                         if(sz==1)
  40                         {
  41                                 union { unsigned char c[4]; float f; } u;
  42                                 u.c[0] = static_cast<unsigned char>(col.r*255);
  43                                 u.c[1] = static_cast<unsigned char>(col.g*255);
  44                                 u.c[2] = static_cast<unsigned char>(col.b*255);
  45                                 u.c[3] = static_cast<unsigned char>(col.a*255);
  46                                 *ptr++ = u.f;
  47                         }
  48                         else
  49                         {
  50                                 *ptr++ = col.r;
  51                                 *ptr++ = col.g;
  52                                 *ptr++ = col.b;
  53                                 if(sz>=4) *ptr++ = col.a;
  54                         }
  55                         break;
  56                 default:
  57                         const Vector4 &a = (t<11 ? texc[t-3] : attr[t-11]);
  58                         *ptr++ = a.x;
  59                         if(sz>=2) *ptr++ = a.y;
  60                         if(sz>=3) *ptr++ = a.z;
  61                         if(sz>=4) *ptr++ = a.w;
  62                         break;
  63                 }
  64         }
  65 }
  66
  67 } // namespace GL
  68 } // namespace Msp