const int GLUP_CLIP_STANDARD         = 0;
const int GLUP_CLIP_WHOLE_CELLS      = 1;
const int GLUP_CLIP_STRADDLING_CELLS = 2;
const int GLUP_CLIP_SLICE_CELLS      = 3;
                                                      
const int GLUP_TEXTURE_1D = 1;
const int GLUP_TEXTURE_2D = 2;
const int GLUP_TEXTURE_3D = 3;
                                                      
const int GLUP_TEXTURE_REPLACE  = 0;
const int GLUP_TEXTURE_MODULATE = 1;        
const int GLUP_TEXTURE_ADD      = 2;        
                                                      
const int GLUP_PICK_PRIMITIVE   = 1;        
const int GLUP_PICK_CONSTANT    = 2;        

const int GLUP_POINTS     =0;               
const int GLUP_LINES      =1;               
const int GLUP_TRIANGLES  =2;               
const int GLUP_QUADS      =3;               
const int GLUP_TETRAHEDRA =4;               
const int GLUP_HEXAHEDRA  =5;               
const int GLUP_PRISMS     =6;               
const int GLUP_PYRAMIDS   =7;               
const int GLUP_CONNECTORS =8;
const int GLUP_SPHERES    =9;                                    

const int GLUP_LIGHTING           =0;
const int GLUP_VERTEX_COLORS      =1;
const int GLUP_TEXTURING          =2;
const int GLUP_DRAW_MESH          =3;
const int GLUP_CLIPPING           =4;
const int GLUP_INDIRECT_TEXTURING =5;
const int GLUP_VERTEX_NORMALS     =6;
const int GLUP_PICKING            =7;
const int GLUP_ALPHA_DISCARD      =8;
const int GLUP_NORMAL_MAPPING     =9;
