Allow generic vertex attribute 0, since OpenGL 3.0 does not support any fixed-functio...

[libs/gl.git] / source / vertexarraybuilder.cpp

diff --git a/source/vertexarraybuilder.cpp b/source/vertexarraybuilder.cpp
index 5f469a985173b3f5f8cc0143ebe54406ee393703..09b0a1f2a85655e21e3f87b15525a7f8ac87d756 100644 (file)
--- a/source/vertexarraybuilder.cpp
+++ b/source/vertexarraybuilder.cpp
@@ -1,7 +1,7 @@
 /* $Id$
 
 This file is part of libmspgl
-Copyright © 2007  Mikko Rasa, Mikkosoft Productions
+Copyright © 2007-2009  Mikko Rasa, Mikkosoft Productions
 Distributed under the LGPL
 */
 
@@ -11,8 +11,7 @@ Distributed under the LGPL
 namespace Msp {
 namespace GL {
 
-VertexArrayBuilder::VertexArrayBuilder(VertexArray &a, std::vector<float> &d):
-       data(d),
+VertexArrayBuilder::VertexArrayBuilder(VertexArray &a):
        array(a)
 { }
 
@@ -23,46 +22,55 @@ VertexArrayBuilder::~VertexArrayBuilder()
 
 void VertexArrayBuilder::vertex_(float x, float y, float z, float w)
 {
-       for(uint fmt=array.get_format(); fmt; fmt>>=4)
+       float *ptr=array.append();
+       for(const unsigned char *c=array.get_format().begin(); c!=array.get_format().end(); ++c)
        {
-               uint size=(fmt&3)+1;
-               switch(fmt&12)
+               uint size=(*c&3)+1;
+               uint type=*c>>2;
+               switch(type)
                {
                case 0:
-                       data.push_back(x);
-                       data.push_back(y);
-                       if(size>=3) data.push_back(z);
-                       if(size>=4) data.push_back(w);
+                       *ptr++=x;
+                       *ptr++=y;
+                       if(size>=3) *ptr++=z;
+                       if(size>=4) *ptr++=w;
                        break;
-               case 4:
-                       data.push_back(nx);
-                       data.push_back(ny);
-                       data.push_back(nz);
+               case 1:
+                       *ptr++=nx;
+                       *ptr++=ny;
+                       *ptr++=nz;
                        break;
-               case 8:
-                       data.push_back(ts);
-                       if(size>=2) data.push_back(tt);
-                       if(size>=3) data.push_back(tr);
-                       if(size>=4) data.push_back(tq);
+               case 2:
+                       *ptr++=ts;
+                       if(size>=2) *ptr++=tt;
+                       if(size>=3) *ptr++=tr;
+                       if(size>=4) *ptr++=tq;
                        break;
-               case 12:
+               case 3:
                        if(size==1)
                        {
                                union { ubyte c[4]; float f; } u;
-                               u.c[0]=(ubyte)(cr*255);
-                               u.c[1]=(ubyte)(cg*255);
-                               u.c[2]=(ubyte)(cb*255);
-                               u.c[3]=(ubyte)(ca*255);
-                               data.push_back(u.f);
+                               u.c[0]=static_cast<ubyte>(cr*255);
+                               u.c[1]=static_cast<ubyte>(cg*255);
+                               u.c[2]=static_cast<ubyte>(cb*255);
+                               u.c[3]=static_cast<ubyte>(ca*255);
+                               *ptr++=u.f;
                        }
                        else
                        {
-                               data.push_back(cr);
-                               data.push_back(cg);
-                               data.push_back(cb);
-                               if(size>=4) data.push_back(ca);
+                               *ptr++=cr;
+                               *ptr++=cg;
+                               *ptr++=cb;
+                               if(size>=4) *+ptr++=ca;
                        }
                        break;
+               default:
+                       const Attrib &a=av[type-4];
+                       *ptr++=a.x;
+                       if(size>=2) *ptr++=a.y;
+                       if(size>=3) *ptr++=a.z;
+                       if(size>=4) *ptr++=a.w;
+                       break;
                }
        }
 }