gltrianglemesh.h Example File

 /****************************************************************************
 **
 ** 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.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and The Qt Company. For licensing terms
 ** and conditions see http://www.qt.io/terms-conditions. For further
 ** information use the contact form at http://www.qt.io/contact-us.
 **
 ** GNU Lesser General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU Lesser
 ** General Public License version 2.1 or version 3 as published by the Free
 ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
 ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
 ** following information to ensure the GNU Lesser General Public License
 ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
 **
 ** As a special exception, The Qt Company gives you certain additional
 ** rights. These rights are described in The Qt Company LGPL Exception
 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License version 3.0 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.GPL included in the
 ** packaging of this file.  Please review the following information to
 ** ensure the GNU General Public License version 3.0 requirements will be
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #ifndef GLTRIANGLEMESH_H
 #define GLTRIANGLEMESH_H

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

 #include <QtGui>
 #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