- Qt 5.5
- Qt Widgets
- Boxes
- gltrianglemesh.h Example File
- Qt 5.5.1 Reference Documentation

# gltrianglemesh.h Example File

graphicsview/boxes/gltrianglemesh.h

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the demonstration applications of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
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    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
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    #ifndef GLTRIANGLEMESH_H
    #define GLTRIANGLEMESH_H

    //#include <GL/glew.h>
    #include "glextensions.h"

    #include <QtWidgets>
    #include <QtOpenGL>

    #include "glbuffers.h"

    template<class TVertex, class TIndex>
    class GLTriangleMesh
    {
    public:
        GLTriangleMesh(int vertexCount, int indexCount) : m_vb(vertexCount), m_ib(indexCount)
        {
        }

        virtual ~GLTriangleMesh()
        {
        }

        virtual void draw()
        {
            if (failed())
                return;

            int type = GL_UNSIGNED_INT;
            if (sizeof(TIndex) == sizeof(char)) type = GL_UNSIGNED_BYTE;
            if (sizeof(TIndex) == sizeof(short)) type = GL_UNSIGNED_SHORT;

            m_vb.bind();
            m_ib.bind();
            glDrawElements(GL_TRIANGLES, m_ib.length(), type, BUFFER_OFFSET(0));
            m_vb.unbind();
            m_ib.unbind();
        }

        bool failed()
        {
            return m_vb.failed() || m_ib.failed();
        }
    protected:
        GLVertexBuffer<TVertex> m_vb;
        GLIndexBuffer<TIndex> m_ib;
    };

    #endif