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- /****************************************************************************
- ** $Id: qt/glbox.cpp 3.0.3 edited Oct 12 12:18 $
- **
- ** Copyright (C) 1992-2000 Trolltech AS. All rights reserved.
- **
- ** This file is part of an example program for Qt. This example
- ** program may be used, distributed and modified without limitation.
- **
- *****************************************************************************/
-
- /****************************************************************************
- **
- ** 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"
-
- #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, name )
- {
- 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( 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 );
- }
-
-
- /*!
- Generate an OpenGL display list for the object to be shown, i.e. the box
- */
-
- GLuint GLBox::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( 1.0, 0.5, -0.4 );
- glVertex3f( 1.0, -0.5, -0.4 );
- glVertex3f( -1.0, -0.5, -0.4 );
- glVertex3f( -1.0, 0.5, -0.4 );
- glEnd();
-
- glBegin( GL_LINE_LOOP );
- glVertex3f( 1.0, 0.5, 0.4 );
- glVertex3f( 1.0, -0.5, 0.4 );
- glVertex3f( -1.0, -0.5, 0.4 );
- glVertex3f( -1.0, 0.5, 0.4 );
- glEnd();
-
- glBegin( GL_LINES );
- glVertex3f( 1.0, 0.5, -0.4 ); glVertex3f( 1.0, 0.5, 0.4 );
- glVertex3f( 1.0, -0.5, -0.4 ); glVertex3f( 1.0, -0.5, 0.4 );
- glVertex3f( -1.0, -0.5, -0.4 ); glVertex3f( -1.0, -0.5, 0.4 );
- glVertex3f( -1.0, 0.5, -0.4 ); glVertex3f( -1.0, 0.5, 0.4 );
- glEnd();
-
- glEndList();
-
- return list;
- }
-
-
- /*!
- Set the rotation angle of the object to \e degrees around the X axis.
- */
-
- void GLBox::setXRotation( int degrees )
- {
- xRot = (GLfloat)(degrees % 360);
- updateGL();
- }
-
-
- /*!
- Set the rotation angle of the object to \e degrees around the Y axis.
- */
-
- void GLBox::setYRotation( int degrees )
- {
- yRot = (GLfloat)(degrees % 360);
- updateGL();
- }
-
-
- /*!
- Set the rotation angle of the object to \e degrees around the Z axis.
- */
-
- void GLBox::setZRotation( int degrees )
- {
- zRot = (GLfloat)(degrees % 360);
- updateGL();
- }
-