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 VertexArrayBuilder::~VertexArrayBuilder()
  19 {
  20         array.update_data();
  21 }
  22
  23 void VertexArrayBuilder::vertex_(float x, float y, float z, float w)
  24 {
  25         float *ptr = array.append();
  26         for(const unsigned char *c=array.get_format().begin(); c!=array.get_format().end(); ++c)
  27         {
  28                 unsigned sz = (*c&3)+1;
  29                 unsigned t = *c>>2;
  30                 switch(t)
  31                 {
  32                 case 0:
  33                         *ptr++ = x;
  34                         *ptr++ = y;
  35                         if(sz>=3) *ptr++ = z;
  36                         if(sz>=4) *ptr++ = w;
  37                         break;
  38                 case 1:
  39                         *ptr++ = nor.x;
  40                         *ptr++ = nor.y;
  41                         *ptr++ = nor.z;
  42                         break;
  43                 case 2:
  44                         if(sz==1)
  45                         {
  46                                 union { unsigned char c[4]; float f; } u;
  47                                 u.c[0] = static_cast<unsigned char>(col.r*255);
  48                                 u.c[1] = static_cast<unsigned char>(col.g*255);
  49                                 u.c[2] = static_cast<unsigned char>(col.b*255);
  50                                 u.c[3] = static_cast<unsigned char>(col.a*255);
  51                                 *ptr++ = u.f;
  52                         }
  53                         else
  54                         {
  55                                 *ptr++ = col.r;
  56                                 *ptr++ = col.g;
  57                                 *ptr++ = col.b;
  58                                 if(sz>=4) *ptr++ = col.a;
  59                         }
  60                         break;
  61                 default:
  62                         const Vector4 &a = (t<11 ? texc[t-3] : attr[t-11]);
  63                         *ptr++ = a.x;
  64                         if(sz>=2) *ptr++ = a.y;
  65                         if(sz>=3) *ptr++ = a.z;
  66                         if(sz>=4) *ptr++ = a.w;
  67                         break;
  68                 }
  69         }
  70 }
  71
  72 } // namespace GL
  73 } // namespace Msp