blob: 052ac049ccc42d0076b09d270e084f60aa959d72 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/*
* VBOMesh.h
* OpenGL SuperBible
*
* Copyright 2007 Richard S. Wright Jr.. All rights reserved.
* This class allows you to simply add triangles as if this class were a
* container. The AddTriangle() function searches the current list of triangles
* and determines if the vertex/normal/texcoord is a duplicate. If so, it addes
* an entry to the index array instead of the list of vertices.
* When finished, call EndMesh() to free up extra unneeded memory that is reserved
* as workspace when you call BeginMesh().
*
* This class can easily be extended to contain other vertex attributes, and to
* save itself and load itself from disk (thus forming the beginnings of a custom
* model file format).
*
* Very similiar to CTriangleMesh, except the final arrays are stored in Vertex buffer objects
* Before anybody flames me, bear in mind this is not a book on object oriented programming,
* and I'm trying to be nice to the C people ;-)
* Yes, I know all about inheritance, and it's all good....
*/
#include "gltools.h"
#include "math3d.h"
#define VERTEX_DATA 0
#define NORMAL_DATA 1
#define TEXTURE_DATA 2
#define INDEX_DATA 3
class CVBOMesh
{
public:
CVBOMesh(void);
~CVBOMesh(void);
// Use these three functions to add triangles
void BeginMesh(GLuint nMaxVerts);
void AddTriangle(M3DVector3f verts[3], M3DVector3f vNorms[3], M3DVector2f vTexCoords[3]);
void EndMesh(void);
// Useful for statistics
inline GLuint GetIndexCount(void) { return nNumIndexes; }
inline GLuint GetVertexCount(void) { return nNumVerts; }
// In place scale of the vertices
void Scale(GLfloat fScaleValue);
// Draw - make sure you call glEnableClientState for these arrays
void Draw(void);
protected:
GLushort *pIndexes; // Array of indexes
M3DVector3f *pVerts; // Array of vertices
M3DVector3f *pNorms; // Array of normals
M3DVector2f *pTexCoords; // Array of texture coordinates
GLuint nMaxIndexes; // Maximum workspace
GLuint nNumIndexes; // Number of indexes currently used
GLuint nNumVerts; // Number of vertices actually used
GLuint bufferObjects[4];
};
|
