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<td align="right" valign="top" width="230"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></td></tr></table><h1 align="center">glbox.cpp Example File<br /><small><small>activeqt/opengl/glbox.cpp</small></small></h1>

<pre>  /****************************************************************************

** This file is part of the documentation of the Qt Toolkit.

** This file may be distributed under the terms of the Q Public License

** as defined by Trolltech AS of Norway and appearing in the file

** LICENSE.QPL included in the packaging of this file.

** This file may be distributed and/or modified under the terms of the

** GNU General Public License version 2 as published by the Free Software

** Foundation and appearing in the file LICENSE.GPL included in the

** packaging of this file.

** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for

** information about Qt Commercial License Agreements.

** See http://www.trolltech.com/qpl/ for QPL licensing information.

** See http://www.trolltech.com/gpl/ for GPL licensing information.

** Contact info@trolltech.com if any conditions of this licensing are

** not clear to you.

** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE

** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

****************************************************************************/

/****************************************************************************

** 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.h>

#include <quuid.h>

#include <objsafe.h>

#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 );

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glScalef( scale, scale, scale );

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glRotatef( xRot, 1.0, 0.0, 0.0 );

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glRotatef( yRot, 0.0, 1.0, 0.0 );

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glRotatef( zRot, 0.0, 0.0, 1.0 );

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glCallList( object );

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}

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/*!

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Set up the OpenGL rendering state, and define display list

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void GLBox::initializeGL()

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{

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qglClearColor(Qt::black); // Let OpenGL clear to black

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object = makeObject(); // Generate an OpenGL display list

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glShadeModel( GL_FLAT );

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}

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/*!

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Set up the OpenGL view port, matrix mode, etc.

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void GLBox::resizeGL( int w, int h )

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{

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glViewport( 0, 0, (GLint)w, (GLint)h );

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glMatrixMode( GL_PROJECTION );

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glLoadIdentity();

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glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 15.0 );

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glMatrixMode( GL_MODELVIEW );

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}

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/*!

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Generate an OpenGL display list for the object to be shown, i.e. the box

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GLuint GLBox::makeObject()

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{

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GLuint list;

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list = glGenLists( 1 );

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glNewList( list, GL_COMPILE );

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qglColor(Qt::white); // Shorthand for glColor3f or glIndex

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glLineWidth( 2.0 );

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glBegin( GL_LINE_LOOP );

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glVertex3f( 1.0, 0.5, -0.4 );

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glVertex3f( 1.0, -0.5, -0.4 );

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glVertex3f( -1.0, -0.5, -0.4 );

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glVertex3f( -1.0, 0.5, -0.4 );

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glEnd();

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glBegin( GL_LINE_LOOP );

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glVertex3f( 1.0, 0.5, 0.4 );

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glVertex3f( 1.0, -0.5, 0.4 );

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glVertex3f( -1.0, -0.5, 0.4 );

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glVertex3f( -1.0, 0.5, 0.4 );

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glEnd();

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glBegin( GL_LINES );

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glVertex3f( 1.0, 0.5, -0.4 ); glVertex3f( 1.0, 0.5, 0.4 );

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glVertex3f( 1.0, -0.5, -0.4 ); glVertex3f( 1.0, -0.5, 0.4 );

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glVertex3f( -1.0, -0.5, -0.4 ); glVertex3f( -1.0, -0.5, 0.4 );

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glVertex3f( -1.0, 0.5, -0.4 ); glVertex3f( -1.0, 0.5, 0.4 );

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glEnd();

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glEndList();

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return list;

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}

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/*!

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Set the rotation angle of the object to \e degrees around the X axis.

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void GLBox::setXRotation( int degrees )

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{

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xRot = (GLfloat)(degrees % 360);

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updateGL();

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}

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/*!

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Set the rotation angle of the object to \e degrees around the Y axis.

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void GLBox::setYRotation( int degrees )

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{

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yRot = (GLfloat)(degrees % 360);

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updateGL();

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}

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/*!

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Set the rotation angle of the object to \e degrees around the Z axis.

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void GLBox::setZRotation( int degrees )

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{

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zRot = (GLfloat)(degrees % 360);

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updateGL();

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}

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class ObjectSafetyImpl : public QAxAggregated,

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public IObjectSafety

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{

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public:

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ObjectSafetyImpl() {}

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long queryInterface( const QUuid &iid, void **iface )

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{

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*iface = 0;

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if ( iid == IID_IObjectSafety )

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*iface = (IObjectSafety*)this;

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else

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return E_NOINTERFACE;

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AddRef();

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return S_OK;

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}

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QAXAGG_IUNKNOWN;

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HRESULT WINAPI GetInterfaceSafetyOptions( REFIID riid, DWORD *pdwSupportedOptions, DWORD *pdwEnabledOptions )

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{

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*pdwSupportedOptions = INTERFACESAFE_FOR_UNTRUSTED_DATA | INTERFACESAFE_FOR_UNTRUSTED_CALLER;

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*pdwEnabledOptions = INTERFACESAFE_FOR_UNTRUSTED_DATA | INTERFACESAFE_FOR_UNTRUSTED_CALLER;

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return S_OK;

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}

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HRESULT WINAPI SetInterfaceSafetyOptions( REFIID riid, DWORD pdwSupportedOptions, DWORD pdwEnabledOptions )

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{

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return S_OK;

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}

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};

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QAxAggregated *GLBox::createAggregate()

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{

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return new ObjectSafetyImpl();

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}</pre>

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