/************************************************************************** Copyright (C) 2000-2001 Trolltech AS.  All rights reserved.**** This file is part of Qt Designer.**** 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.**** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition** licenses may use this file in accordance with the Qt Commercial License** Agreement provided with the Software.**** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.**** See http://www.trolltech.com/gpl/ for GPL licensing information.** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for**   information about Qt Commercial License Agreements.**** Contact info@trolltech.com if any conditions of this licensing are** not clear to you.************************************************************************/#include "glwidget.h"/*!  Create a GLWidget widget*/GLWidget::GLWidget( QWidget* parent, const char* name )    : QGLWidget( parent, name ){    xrot = yrot = zrot = 25;		// default object rotation    scale_ = 1.25;			// default object scale    object = 0;}/*!  Release allocated resources*/GLWidget::~GLWidget(){    glDeleteLists( object, 1 );}/*!  Paint the box. The actual openGL commands for drawing the box are  performed here.*/void GLWidget::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 GLWidget::initializeGL(){    qglClearColor( 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 GLWidget::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 );}/*!  Generate an OpenGL display list for the object to be shown, i.e. the box*/GLuint GLWidget::makeObject(){	    GLuint list;    list = glGenLists( 1 );    glNewList( list, GL_COMPILE );    qglColor( white );		      // Shorthand for glColor3f or glIndex    glLineWidth( 2.0 );    glBegin( GL_LINE_LOOP );    glVertex3f(  1.0f,  0.5f, -0.4f );    glVertex3f(  1.0f, -0.5f, -0.4f );    glVertex3f( -1.0f, -0.5f, -0.4f );    glVertex3f( -1.0f,  0.5f, -0.4f );    glEnd();    glBegin( GL_LINE_LOOP );    glVertex3f(  1.0f,  0.5f, 0.4f );    glVertex3f(  1.0f, -0.5f, 0.4f );    glVertex3f( -1.0f, -0.5f, 0.4f );    glVertex3f( -1.0f,  0.5f, 0.4f );    glEnd();    glBegin( GL_LINES );    glVertex3f(  1.0f,  0.5f, -0.4f );   glVertex3f(  1.0f,  0.5f, 0.4f );    glVertex3f(  1.0f, -0.5f, -0.4f );   glVertex3f(  1.0f, -0.5f, 0.4f );    glVertex3f( -1.0f, -0.5f, -0.4f );   glVertex3f( -1.0f, -0.5f, 0.4f );    glVertex3f( -1.0f,  0.5f, -0.4f );   glVertex3f( -1.0f,  0.5f, 0.4f );    glEnd();    glEndList();    return list;}void GLWidget::setXRot( double x ){    xrot = x;    update();}void GLWidget::setYRot( double y ){    yrot = y;    update();}void GLWidget::setZRot( double z ){    zrot = z;    update();}void GLWidget::setScale( double s ){    scale_ = s;    update();}