source/builders/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 &vtx)
  12 {
  13         float *ptr = array.append();
  14         const VertexFormat &format = array.get_format();
  15         for(const unsigned char *a=format.begin(); a!=format.end(); ++a)
  16         {
  17                 unsigned sem = get_attribute_semantic(*a);
  18                 unsigned sz = get_attribute_size(*a);
  19                 if(sem>=attr.size())
  20                         ptr += sz;
  21                 else if(*a==COLOR4_UBYTE)
  22                 {
  23                         union { unsigned char c[4]; float f; } u;
  24                         u.c[0] = static_cast<unsigned char>(attr[sem].x*255);
  25                         u.c[1] = static_cast<unsigned char>(attr[sem].y*255);
  26                         u.c[2] = static_cast<unsigned char>(attr[sem].z*255);
  27                         u.c[3] = static_cast<unsigned char>(attr[sem].w*255);
  28                         *ptr++ = u.f;
  29                 }
  30                 else
  31                 {
  32                         const Vector4 &v = (sem==0 ? vtx : attr[sem]);
  33                         *ptr++ = v.x;
  34                         if(sz>=2) *ptr++ = v.y;
  35                         if(sz>=3) *ptr++ = v.z;
  36                         if(sz>=4) *ptr++ = v.w;
  37                 }
  38         }
  39 }
  40
  41 } // namespace GL
  42 } // namespace Msp