3 This file is part of libmspgl
4 Copyright © 2007 Mikko Rasa, Mikkosoft Productions
5 Distributed under the LGPL
8 #ifndef MSP_GL_VERTEXBUILDER_H_
9 #define MSP_GL_VERTEXBUILDER_H_
17 Base class for classes that build vertices from a series of function calls.
18 The operating model closely follows that of OpenGL immediate mode: vertex
19 attributes can be specified at any time, and when a vertex() function is
20 called, a vertex is created with the active attribute values.
22 A derived class must overload the 4-argument vertex_() function to process the
23 data. Attributes can be read from protected member variables.
29 virtual ~VertexBuilder() { }
31 void vertex(float x, float y) { vertex(x, y, 0, 1); }
32 void vertex(float x, float y, float z) { vertex(x, y, z, 1); }
33 void vertex(float x, float y, float z, float w) { vertex_(x, y, z, w); }
34 void normal(float x, float y, float z) { nx=x; ny=y; nz=z; }
35 void texcoord(float s) { texcoord(s, 0, 0, 1); }
36 void texcoord(float s, float t) { texcoord(s, t, 0, 1); }
37 void texcoord(float s, float t, float r) { texcoord(s, t, r, 1); }
38 void texcoord(float s, float t, float r, float q) { ts=s; tt=t; tr=r; tq=q; }
39 void color(ubyte r, ubyte g, ubyte b) { color(r, g, b, 255); }
40 void color(ubyte r, ubyte g, ubyte b, ubyte a) { color(r/255.f, g/255.f, b/255.f, a/255.f); }
41 void color(float r, float g, float b) { color(r, g, b, 1); }
42 void color(float r, float g, float b, float a) { cr=r; cg=g; cb=b; ca=a; }
44 float cr, cg, cb, ca; // Color
45 float ts, tt, tr, tq; // TexCoord
46 float nx, ny, nz; // Normal
48 virtual void vertex_(float, float, float, float) =0;