source/primitivebuilder.cpp

   1 #include "primitivebuilder.h"
   2
   3 namespace Msp {
   4 namespace GL {
   5
   6 PrimitiveBuilder::PrimitiveBuilder(VertexArray &a):
   7         array(a),
   8         vab(array),
   9         in_batch(false),
  10         offs(0)
  11 { }
  12
  13 void PrimitiveBuilder::begin(PrimitiveType t)
  14 {
  15         if(in_batch)
  16                 throw InvalidState("begin() already called");
  17
  18         type = t;
  19         in_batch = true;
  20
  21         begin_();
  22 }
  23
  24 void PrimitiveBuilder::end()
  25 {
  26         if(!in_batch)
  27                 throw InvalidState("end() called without begin()");
  28
  29         in_batch = false;
  30
  31         end_();
  32 }
  33
  34 void PrimitiveBuilder::offset(unsigned o)
  35 {
  36         if(o>array.size())
  37                 throw InvalidParameterValue("Element offset out of range");
  38         offs = o;
  39 }
  40
  41 void PrimitiveBuilder::element(unsigned i)
  42 {
  43         if(!in_batch)
  44                 throw InvalidState("Element specification not between begin() and end()");
  45         if(offs+i>=array.size())
  46                 throw InvalidParameterValue("Element index out of range");
  47         element_(offs+i);
  48 }
  49
  50 PrimitiveType PrimitiveBuilder::get_type() const
  51 {
  52         if(!in_batch)
  53                 throw InvalidState("Not between begin() and end()");
  54         return type;
  55 }
  56
  57 void PrimitiveBuilder::vertex_(const Vector4 &v)
  58 {
  59         vab.color(col);
  60         vab.normal(nor);
  61         for(std::map<unsigned, Vector4>::iterator i=texc.begin(); i!=texc.end(); ++i)
  62                 vab.multitexcoord(i->first, i->second);
  63         for(std::map<unsigned, Vector4>::iterator i=attr.begin(); i!=attr.end(); ++i)
  64                 vab.attrib(i->first, i->second);
  65         vab.vertex(v);
  66
  67         if(in_batch)
  68                 element_(array.size()-1);
  69 }
  70
  71 } // namespace GL
  72 } // namespace Msp