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458 lines
14 KiB
458 lines
14 KiB
/****************************************************************************
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**
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** Implementation of GLTeapots
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** This is a TQGLWidget displaying a group of teapots and a rubber-band
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** in an overlay plane
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**
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** The OpenGL code in this example is mostly borrowed from the "teapots"
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** example program in the "OpenGL Programming Guide", by Jackie Neider,
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** Tom Davis, and Mason Woo, Addison Wesley 1993.
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** It can be obtained from ftp.sgi.com and contains the following copyright
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** notice:
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* (c) Copyright 1993, Silicon Graphics, Inc.
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* ALL RIGHTS RESERVED
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* Permission to use, copy, modify, and distribute this software for
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* any purpose and without fee is hereby granted, provided that the above
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* copyright notice appear in all copies and that both the copyright notice
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* and this permission notice appear in supporting documentation, and that
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* the name of Silicon Graphics, Inc. not be used in advertising
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* or publicity pertaining to distribution of the software without specific,
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* written prior permission.
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*
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* THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
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* AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
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* GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
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* SPECIAL, INCIDENTAL, INDIRECT OR CONSETQUENTIAL DAMAGES OF ANY
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* KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
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* LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
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* THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
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* ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
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* POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* US Government Users Restricted Rights
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* Use, duplication, or disclosure by the Government is subject to
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* restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
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* (c)(1)(ii) of the Rights in Technical Data and Computer Software
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* clause at DFARS 252.227-7013 and/or in similar or successor
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* clauses in the FAR or the DOD or NASA FAR Supplement.
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* Unpublished-- rights reserved under the copyright laws of the
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* United States. Contractor/manufacturer is Silicon Graphics,
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* Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
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*
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* OpenGL(TM) is a trademark of Silicon Graphics, Inc.
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****************************************************************************/
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#include "glteapots.h"
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#include <ntqapplication.h>
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#if defined(Q_CC_MSVC)
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#pragma warning(disable:4305) // init: truncation from const double to float
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#endif
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/*!
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Create a GLTeapots widget.
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Specifies the following frame buffer requirements to the TQGLWidget
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constructor:
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<ul>
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<li> HasOverlay - we want an overlay context to draw the rubber-band in
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<li> SingleBuffer - makes the drawing process of the teapots visible
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</ul>
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*/
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GLTeapots::GLTeapots( TQWidget* parent, const char* name )
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: TQGLWidget( TQGLFormat( TQGL::SingleBuffer | TQGL::HasOverlay ),
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parent, name )
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{
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teapotList = 0;
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rubberOn = FALSE;
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}
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/*!
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Release allocated resources
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*/
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GLTeapots::~GLTeapots()
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{
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makeCurrent();
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glDeleteLists( teapotList, 1 );
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}
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/*!
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Do the main plane painting: a set of teapots.
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*/
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void GLTeapots::paintGL()
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{
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TQApplication::setOverrideCursor( waitCursor ); // Since it takes some time
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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renderTeapot( 2.0, 17.0, 0.0215, 0.1745, 0.0215,
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0.07568, 0.61424, 0.07568,
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0.633, 0.727811, 0.633, 0.6 );
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renderTeapot( 2.0, 14.0, 0.135, 0.2225, 0.1575,
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0.54, 0.89, 0.63, 0.316228,
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0.316228, 0.316228, 0.1 );
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renderTeapot( 2.0, 11.0, 0.05375, 0.05, 0.06625,
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0.18275, 0.17, 0.22525,
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0.332741, 0.328634, 0.346435, 0.3 );
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renderTeapot( 2.0, 8.0, 0.25, 0.20725, 0.20725,
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1, 0.829, 0.829, 0.296648,
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0.296648, 0.296648, 0.088 );
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renderTeapot( 2.0, 5.0, 0.1745, 0.01175, 0.01175,
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0.61424, 0.04136, 0.04136,
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0.727811, 0.626959, 0.626959, 0.6);
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renderTeapot( 2.0, 2.0, 0.1, 0.18725, 0.1745,
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0.396, 0.74151, 0.69102,
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0.297254, 0.30829, 0.306678, 0.1 );
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renderTeapot( 6.0, 17.0, 0.329412, 0.223529, 0.027451,
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0.780392, 0.568627, 0.113725,
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0.992157, 0.941176, 0.807843, 0.21794872 );
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renderTeapot( 6.0, 14.0, 0.2125, 0.1275, 0.054,
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0.714, 0.4284, 0.18144,
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0.393548, 0.271906, 0.166721, 0.2 );
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renderTeapot( 6.0, 11.0, 0.25, 0.25, 0.25,
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0.4, 0.4, 0.4,
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0.774597, 0.774597, 0.774597, 0.6 );
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renderTeapot( 6.0, 8.0, 0.19125, 0.0735, 0.0225,
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0.7038, 0.27048, 0.0828,
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0.256777, 0.137622, 0.086014, 0.1 );
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renderTeapot( 6.0, 5.0, 0.24725, 0.1995, 0.0745,
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0.75164, 0.60648, 0.22648,
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0.628281, 0.555802, 0.366065, 0.4 );
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renderTeapot( 6.0, 2.0, 0.19225, 0.19225, 0.19225,
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0.50754, 0.50754, 0.50754,
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0.508273, 0.508273, 0.508273, 0.4 );
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renderTeapot( 10.0, 17.0, 0.0, 0.0, 0.0,
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0.01, 0.01, 0.01,
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0.50, 0.50, 0.50, .25 );
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renderTeapot( 10.0, 14.0, 0.0, 0.1, 0.06,
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0.0, 0.50980392, 0.50980392,
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0.50196078, 0.50196078, 0.50196078, .25 );
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renderTeapot( 10.0, 11.0, 0.0, 0.0, 0.0,
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0.1, 0.35, 0.1,
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0.45, 0.55, 0.45, .25 );
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renderTeapot( 10.0, 8.0, 0.0, 0.0, 0.0,
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0.5, 0.0, 0.0,
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0.7, 0.6, 0.6, .25 );
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renderTeapot( 10.0, 5.0, 0.0, 0.0, 0.0,
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0.55, 0.55, 0.55,
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0.70, 0.70, 0.70, .25 );
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renderTeapot( 10.0, 2.0, 0.0, 0.0, 0.0,
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0.5, 0.5, 0.0,
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0.60, 0.60, 0.50, .25 );
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renderTeapot( 14.0, 17.0, 0.02, 0.02, 0.02,
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0.01, 0.01, 0.01,
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0.4, 0.4, 0.4, .078125 );
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renderTeapot( 14.0, 14.0, 0.0, 0.05, 0.05,
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0.4, 0.5, 0.5,
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0.04, 0.7, 0.7, .078125 );
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renderTeapot( 14.0, 11.0, 0.0, 0.05, 0.0,
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0.4, 0.5, 0.4,
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0.04, 0.7, 0.04, .078125 );
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renderTeapot( 14.0, 8.0, 0.05, 0.0, 0.0,
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0.5, 0.4, 0.4,
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0.7, 0.04, 0.04, .078125 );
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renderTeapot( 14.0, 5.0, 0.05, 0.05, 0.05,
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0.5, 0.5, 0.5,
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0.7, 0.7, 0.7, .078125 );
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renderTeapot( 14.0, 2.0, 0.05, 0.05, 0.0,
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0.5, 0.5, 0.4,
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0.7, 0.7, 0.04, .078125 );
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// May add a glFinish() here to make sure the GL rendering has finished
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// before the mouse cursor is reset from "waiting" to normal.
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TQApplication::restoreOverrideCursor();
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}
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/*!
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Set up the OpenGL rendering state of the main plane
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*/
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void GLTeapots::initializeGL()
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{
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GLfloat ambient[] = { 0.0, 0.0, 0.0, 1.0 };
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GLfloat diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
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GLfloat position[] = { 0.0, 3.0, 3.0, 0.0 };
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GLfloat lmodel_ambient[] = { 0.2, 0.2, 0.2, 1.0 };
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GLfloat local_view[] = { 0.0 };
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glLightfv( GL_LIGHT0, GL_AMBIENT, ambient );
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glLightfv( GL_LIGHT0, GL_DIFFUSE, diffuse );
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glLightfv( GL_LIGHT0, GL_POSITION, position );
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glLightModelfv( GL_LIGHT_MODEL_AMBIENT, lmodel_ambient );
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glLightModelfv( GL_LIGHT_MODEL_LOCAL_VIEWER, local_view );
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glFrontFace( GL_CW );
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glEnable( GL_LIGHTING );
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glEnable( GL_LIGHT0 );
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glEnable( GL_AUTO_NORMAL );
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glEnable( GL_NORMALIZE );
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glEnable( GL_DEPTH_TEST );
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glDepthFunc( GL_LESS );
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}
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/*!
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Set up the main plane's view port, matrix mode, etc. suitably for
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viewing the teapots.
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*/
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void GLTeapots::resizeGL( int w, int h )
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{
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glViewport(0, 0, w, h);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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if ( w <= h )
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glOrtho( 0.0, 20.0, 0.0, 20.0*(GLfloat)h/(GLfloat)w, -10.0, 10.0 );
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else
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glOrtho( 0.0, 20.0*(GLfloat)w/(GLfloat)h, 0.0, 20.0, -10.0, 10.0 );
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glMatrixMode(GL_MODELVIEW);
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}
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/*!
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Set up the OpenGL rendering state of the overlay plane
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*/
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void GLTeapots::initializeOverlayGL()
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{
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glLineWidth( 2 );
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glLineStipple( 3, 0xAAAA );
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glEnable( GL_LINE_STIPPLE );
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}
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/*!
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Do the overlay plane painting: a rubber-band (if the user has
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dragged out one).
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*/
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void GLTeapots::paintOverlayGL()
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{
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glClear( GL_COLOR_BUFFER_BIT );
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if ( rubberOn ) {
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qglColor( TQColor( 255, 255, 0 ) );
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glBegin( GL_LINE_LOOP );
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glVertex2i( rubberP1.x(), rubberP1.y() );
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glVertex2i( rubberP2.x(), rubberP1.y() );
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glVertex2i( rubberP2.x(), rubberP2.y() );
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glVertex2i( rubberP1.x(), rubberP2.y() );
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glEnd();
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}
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}
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/*!
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Set up the overlay plane's view port, matrix mode, etc. suitably for
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viewing the rubber-band.
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*/
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void GLTeapots::resizeOverlayGL( int w, int h )
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{
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glViewport( 0, 0, w, h );
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluOrtho2D( 0, w, h, 0 );
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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}
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/*!
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User presses a mouse button: start pulling out a rubber-band rectangle
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*/
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// We do a simple rubber-band drawing here; erasing the whole overlay
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// plane for each repaint. For less flickering of the rubber-band
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// itself, we could remember the coordinates of the last rectangle
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// drawn, and then erase only that by painting it again with
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// transparent color.
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void GLTeapots::mousePressEvent( TQMouseEvent* e )
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{
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rubberP1 = e->pos();
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rubberP2 = rubberP1;
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rubberOn = TRUE;
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}
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/*!
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User drags the mouse: Update the rubber-band coordinates and repaint
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the overlay.
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*/
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void GLTeapots::mouseMoveEvent( TQMouseEvent* e )
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{
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if ( rubberOn ) {
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rubberP2 = e->pos();
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updateOverlayGL();
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}
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}
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/*!
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User releases the mouse button: remove the rubber-band.
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*/
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void GLTeapots::mouseReleaseEvent( TQMouseEvent* )
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{
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if ( rubberOn ) {
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rubberOn = FALSE;
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updateOverlayGL();
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}
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}
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/*!
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Renders a teapot with the given material properties
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*/
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void GLTeapots::renderTeapot( GLfloat x, GLfloat y, GLfloat ambr,
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GLfloat ambg, GLfloat ambb, GLfloat difr,
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GLfloat difg, GLfloat difb,
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GLfloat specr, GLfloat specg,
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GLfloat specb, GLfloat shine )
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{
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float mat[4];
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glPushMatrix();
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glTranslatef (x, y, 0.0);
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mat[0] = ambr; mat[1] = ambg; mat[2] = ambb; mat[3] = 1.0;
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glMaterialfv (GL_FRONT, GL_AMBIENT, mat);
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mat[0] = difr; mat[1] = difg; mat[2] = difb;
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glMaterialfv (GL_FRONT, GL_DIFFUSE, mat);
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mat[0] = specr; mat[1] = specg; mat[2] = specb;
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glMaterialfv (GL_FRONT, GL_SPECULAR, mat);
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glMaterialf (GL_FRONT, GL_SHININESS, shine*128.0);
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teapot();
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glPopMatrix();
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}
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/*!
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Draw a classic OpenGL teapot
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*/
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void GLTeapots::teapot()
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{
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static long patchdata[][16] = {
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{102,103,104,105,4,5,6,7,8,9,10,11,12,13,14,15},
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{12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27},
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{24,25,26,27,29,30,31,32,33,34,35,36,37,38,39,40},
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{96,96,96,96,97,98,99,100,101,101,101,101,0,1,2,3,},
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{0,1,2,3,106,107,108,109,110,111,112,113,114,115,116,117},
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{118,118,118,118,124,122,119,121,123,126,125,120,40,39,38,37},
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{41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56},
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{53,54,55,56,57,58,59,60,61,62,63,64,28,65,66,67},
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{68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83},
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{80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95}
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};
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static float cpdata[][3] = {
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{0.2,0,2.7},{0.2,-0.112,2.7},{0.112,-0.2,2.7},{0,-0.2,2.7},
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{1.3375,0,2.53125},{1.3375,-0.749,2.53125},{0.749,-1.3375,2.53125},
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{0,-1.3375,2.53125},{1.4375,0,2.53125},{1.4375,-0.805,2.53125},
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{0.805,-1.4375,2.53125},{0,-1.4375,2.53125},{1.5,0,2.4},
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{1.5,-0.84,2.4},{0.84,-1.5,2.4},{0,-1.5,2.4},{1.75,0,1.875},
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{1.75,-0.98,1.875},{0.98,-1.75,1.875},{0,-1.75,1.875},{2,0,1.35},
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{2,-1.12,1.35},{1.12,-2,1.35},{0,-2,1.35},{2,0,0.9},{2,-1.12,0.9},
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{1.12,-2,0.9},{0,-2,0.9},{-2,0,0.9},{2,0,0.45},{2,-1.12,0.45},
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{1.12,-2,0.45},{0,-2,0.45},{1.5,0,0.225},{1.5,-0.84,0.225},
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{0.84,-1.5,0.225},{0,-1.5,0.225},{1.5,0,0.15},{1.5,-0.84,0.15},
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{0.84,-1.5,0.15},{0,-1.5,0.15},{-1.6,0,2.025},{-1.6,-0.3,2.025},
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{-1.5,-0.3,2.25},{-1.5,0,2.25},{-2.3,0,2.025},{-2.3,-0.3,2.025},
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{-2.5,-0.3,2.25},{-2.5,0,2.25},{-2.7,0,2.025},{-2.7,-0.3,2.025},
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{-3,-0.3,2.25},{-3,0,2.25},{-2.7,0,1.8},{-2.7,-0.3,1.8},{-3,-0.3,1.8},
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{-3,0,1.8},{-2.7,0,1.575},{-2.7,-0.3,1.575},{-3,-0.3,1.35},{-3,0,1.35},
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{-2.5,0,1.125},{-2.5,-0.3,1.125},{-2.65,-0.3,0.9375},{-2.65,0,0.9375},
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{-2,-0.3,0.9},{-1.9,-0.3,0.6},{-1.9,0,0.6},{1.7,0,1.425},
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{1.7,-0.66,1.425},{1.7,-0.66,0.6},{1.7,0,0.6},{2.6,0,1.425},
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{2.6,-0.66,1.425},{3.1,-0.66,0.825},{3.1,0,0.825},{2.3,0,2.1},
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{2.3,-0.25,2.1},{2.4,-0.25,2.025},{2.4,0,2.025},{2.7,0,2.4},
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{2.7,-0.25,2.4},{3.3,-0.25,2.4},{3.3,0,2.4},{2.8,0,2.475},
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{2.8,-0.25,2.475},{3.525,-0.25,2.49375},{3.525,0,2.49375},
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{2.9,0,2.475},{2.9,-0.15,2.475},{3.45,-0.15,2.5125},{3.45,0,2.5125},
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{2.8,0,2.4},{2.8,-0.15,2.4},{3.2,-0.15,2.4},{3.2,0,2.4},{0,0,3.15},
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{0.8,0,3.15},{0.8,-0.45,3.15},{0.45,-0.8,3.15},{0,-0.8,3.15},
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{0,0,2.85},{1.4,0,2.4},{1.4,-0.784,2.4},{0.784,-1.4,2.4},{0,-1.4,2.4},
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{0.4,0,2.55},{0.4,-0.224,2.55},{0.224,-0.4,2.55},{0,-0.4,2.55},
|
|
{1.3,0,2.55},{1.3,-0.728,2.55},{0.728,-1.3,2.55},{0,-1.3,2.55},
|
|
{1.3,0,2.4},{1.3,-0.728,2.4},{0.728,-1.3,2.4},{0,-1.3,2.4},{0,0,0},
|
|
{1.425,-0.798,0},{1.5,0,0.075},{1.425,0,0},{0.798,-1.425,0},
|
|
{0,-1.5,0.075},{0,-1.425,0},{1.5,-0.84,0.075},{0.84,-1.5,0.075}
|
|
};
|
|
|
|
static float tex[2][2][2] = {{{0, 0},{1, 0}},{{0, 1},{1, 1}}};
|
|
|
|
if ( !glIsList( teapotList ) ) {
|
|
float p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3];
|
|
long grid = 14;
|
|
|
|
teapotList = glGenLists( 1 );
|
|
glNewList( teapotList, GL_COMPILE );
|
|
glPushMatrix();
|
|
glRotatef( 270.0, 1.0, 0.0, 0.0 );
|
|
glScalef( 0.5, 0.5, 0.5 );
|
|
glTranslatef( 0.0, 0.0, -1.5 );
|
|
for ( long i = 0; i < 10; i++ ) {
|
|
for ( long j = 0; j < 4; j++ ) {
|
|
for ( long k = 0; k < 4; k++ ) {
|
|
for ( long l = 0; l < 3; l++ ) {
|
|
p[j][k][l] = cpdata[patchdata[i][j*4+k]][l];
|
|
q[j][k][l] = cpdata[patchdata[i][j*4+(3-k)]][l];
|
|
if ( l == 1 )
|
|
q[j][k][l] *= -1.0;
|
|
if ( i < 6 ) {
|
|
r[j][k][l] = cpdata[patchdata[i][j*4+(3-k)]][l];
|
|
if ( l == 0 )
|
|
r[j][k][l] *= -1.0;
|
|
s[j][k][l] = cpdata[patchdata[i][j*4+k]][l];
|
|
if ( l == 0 )
|
|
s[j][k][l] *= -1.0;
|
|
if ( l == 1 )
|
|
s[j][k][l] *= -1.0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
glMap2f( GL_MAP2_TEXTURE_COORD_2, 0, 1, 2, 2, 0, 1, 4, 2,
|
|
&tex[0][0][0] );
|
|
glMap2f( GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &p[0][0][0] );
|
|
glEnable( GL_MAP2_VERTEX_3);
|
|
glEnable(GL_MAP2_TEXTURE_COORD_2 );
|
|
glMapGrid2f( grid, 0.0, 1.0, grid, 0.0, 1.0 );
|
|
glEvalMesh2( GL_LINE, 0, grid, 0, grid );
|
|
glMap2f( GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, &q[0][0][0] );
|
|
glEvalMesh2( GL_LINE, 0, grid, 0, grid );
|
|
if ( i < 6 ) {
|
|
glMap2f( GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
|
|
&r[0][0][0]);
|
|
glEvalMesh2( GL_LINE, 0, grid, 0, grid );
|
|
glMap2f( GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4,
|
|
&s[0][0][0] );
|
|
glEvalMesh2( GL_LINE, 0, grid, 0, grid );
|
|
}
|
|
}
|
|
glDisable(GL_MAP2_VERTEX_3);
|
|
glDisable(GL_MAP2_TEXTURE_COORD_2);
|
|
glPopMatrix();
|
|
glEndList();
|
|
}
|
|
|
|
glCallList( teapotList );
|
|
}
|