source: trunk/examples/activeqt/opengl/glbox.cpp@ 936

/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Nokia Corporation ([email protected])
**
** This file is part of the examples of the Qt Toolkit.
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**
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**     notice, this list of conditions and the following disclaimer.
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/****************************************************************************
**
** This is a simple QGLWidget displaying an openGL wireframe box
**
** The OpenGL code is mostly borrowed from Brian Pauls "spin" example
** in the Mesa distribution
**
****************************************************************************/

#include "glbox.h"
#include <QAxAggregated>
#include <QUuid>
//! [0]
#include <objsafe.h>
//! [0]

#if defined(Q_CC_MSVC)
#pragma warning(disable:4305) // init: truncation from const double to float
#endif

/*!
  Create a GLBox widget
*/

GLBox::GLBox( QWidget* parent, const char* name )
    : QGLWidget( parent )
{
    xRot = yRot = zRot = 0.0;           // default object rotation
    scale = 1.25;                       // default object scale
    object = 0;
}


/*!
  Release allocated resources
*/

GLBox::~GLBox()
{
    makeCurrent();
    glDeleteLists( object, 1 );
}


/*!
  Paint the box. The actual openGL commands for drawing the box are
  performed here.
*/

void GLBox::paintGL()
{
    glClear( GL_COLOR_BUFFER_BIT );

    glLoadIdentity();
    glTranslatef( 0.0, 0.0, -10.0 );
    glScalef( scale, scale, scale );

    glRotatef( xRot, 1.0, 0.0, 0.0 ); 
    glRotatef( yRot, 0.0, 1.0, 0.0 ); 
    glRotatef( zRot, 0.0, 0.0, 1.0 );

    glCallList( object );
}


/*!
  Set up the OpenGL rendering state, and define display list
*/

void GLBox::initializeGL()
{
    qglClearColor(Qt::black);           // Let OpenGL clear to black
    object = makeObject();              // Generate an OpenGL display list
    glShadeModel( GL_FLAT );
}



/*!
  Set up the OpenGL view port, matrix mode, etc.
*/

void GLBox::resizeGL( int w, int h )
{
    glViewport( 0, 0, (GLint)w, (GLint)h );
    glMatrixMode( GL_PROJECTION );
    glLoadIdentity();
    glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 15.0 );
    glMatrixMode( GL_MODELVIEW );
}