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50
51#ifndef GLTRIANGLEMESH_H
52#define GLTRIANGLEMESH_H
53
54#include "glbuffers.h"
55#include "glextensions.h"
56
57#include <QtWidgets>
58#include <QtOpenGL>
59
60
61template<class TVertex, class TIndex>
62class GLTriangleMesh
63{
64public:
65 GLTriangleMesh(int vertexCount, int indexCount) : m_vb(vertexCount), m_ib(indexCount)
66 {
67 }
68
69 virtual ~GLTriangleMesh()
70 {
71 }
72
73 virtual void draw()
74 {
75 if (failed())
76 return;
77
78 int type = GL_UNSIGNED_INT;
79 if (sizeof(TIndex) == sizeof(char)) type = GL_UNSIGNED_BYTE;
80 if (sizeof(TIndex) == sizeof(short)) type = GL_UNSIGNED_SHORT;
81
82 m_vb.bind();
83 m_ib.bind();
84 glDrawElements(GL_TRIANGLES, m_ib.length(), type, BUFFER_OFFSET(0));
85 m_vb.unbind();
86 m_ib.unbind();
87 }
88
89 bool failed()
90 {
91 return m_vb.failed() || m_ib.failed();
92 }
93protected:
94 GLVertexBuffer<TVertex> m_vb;
95 GLIndexBuffer<TIndex> m_ib;
96};
97
98
99#endif
100

source code of qtbase/examples/widgets/graphicsview/boxes/gltrianglemesh.h