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/**********************************************************************
**
** Copyright (C) 2000-2008 Trolltech ASA. All rights reserved.
**
** This file is part of TQt Designer.
**
** This file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free
** Software Foundation and appearing in the files LICENSE.GPL2
** and LICENSE.GPL3 included in the packaging of this file.
** Alternatively you may (at your option) use any later version
** of the GNU General Public License if such license has been
** publicly approved by Trolltech ASA (or its successors, if any)
** and the KDE Free TQt Foundation.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/.
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** Licensees holding valid TQt Commercial licenses may use this file in
** accordance with the TQt Commercial License Agreement provided with
** the Software.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
** herein.
**
**********************************************************************/
#include "glwidget.h"
/*!
Create a GLWidget widget
*/
GLWidget::GLWidget( TQWidget* tqparent, const char* name )
: TQGLWidget( tqparent, 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();
}
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