source/vertexarraybuilder.cpp

   1 #include "vertexarray.h"
   2 #include "vertexarraybuilder.h"
   3
   4 namespace Msp {
   5 namespace GL {
   6
   7 VertexArrayBuilder::VertexArrayBuilder(VertexArray &a):
   8         array(a)
   9 { }
  10
  11 void VertexArrayBuilder::vertex_(const Vector4 &v)
  12 {
  13         float *ptr = array.append();
  14         for(const unsigned char *c=array.get_format().begin(); c!=array.get_format().end(); ++c)
  15         {
  16                 unsigned sz = (*c&3)+1;
  17                 unsigned t = *c>>2;
  18                 switch(t)
  19                 {
  20                 case 0:
  21                         *ptr++ = v.x;
  22                         *ptr++ = v.y;
  23                         if(sz>=3) *ptr++ = v.z;
  24                         if(sz>=4) *ptr++ = v.w;
  25                         break;
  26                 case 1:
  27                         *ptr++ = nor.x;
  28                         *ptr++ = nor.y;
  29                         *ptr++ = nor.z;
  30                         break;
  31                 case 2:
  32                         if(sz==1)
  33                         {
  34                                 union { unsigned char c[4]; float f; } u;
  35                                 u.c[0] = static_cast<unsigned char>(col.r*255);
  36                                 u.c[1] = static_cast<unsigned char>(col.g*255);
  37                                 u.c[2] = static_cast<unsigned char>(col.b*255);
  38                                 u.c[3] = static_cast<unsigned char>(col.a*255);
  39                                 *ptr++ = u.f;
  40                         }
  41                         else
  42                         {
  43                                 *ptr++ = col.r;
  44                                 *ptr++ = col.g;
  45                                 *ptr++ = col.b;
  46                                 if(sz>=4) *ptr++ = col.a;
  47                         }
  48                         break;
  49                 default:
  50                         const Vector4 &a = (t<11 ? texc[t-3] : attr[t-11]);
  51                         *ptr++ = a.x;
  52                         if(sz>=2) *ptr++ = a.y;
  53                         if(sz>=3) *ptr++ = a.z;
  54                         if(sz>=4) *ptr++ = a.w;
  55                         break;
  56                 }
  57         }
  58 }
  59
  60 } // namespace GL
  61 } // namespace Msp