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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-07-10 15:24:15 -0500
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-07-10 15:24:15 -0500
commitbd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch)
tree7a520322212d48ebcb9fbe1087e7fca28b76185c /examples/opengl/overlay
downloadqt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz
qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip
Add Qt3 development HEAD version
Diffstat (limited to 'examples/opengl/overlay')
-rw-r--r--examples/opengl/overlay/README9
-rw-r--r--examples/opengl/overlay/globjwin.cpp57
-rw-r--r--examples/opengl/overlay/globjwin.h33
-rw-r--r--examples/opengl/overlay/glteapots.cpp457
-rw-r--r--examples/opengl/overlay/glteapots.h62
-rw-r--r--examples/opengl/overlay/main.cpp52
-rw-r--r--examples/opengl/overlay/overlay.doc16
-rw-r--r--examples/opengl/overlay/overlay.pro14
8 files changed, 700 insertions, 0 deletions
diff --git a/examples/opengl/overlay/README b/examples/opengl/overlay/README
new file mode 100644
index 0000000..f08e539
--- /dev/null
+++ b/examples/opengl/overlay/README
@@ -0,0 +1,9 @@
+
+The overlay example
+
+This example program shows how to use OpenGL overlays with the Qt OpenGL
+Extension. It contains a QGLWidget with a relatively expensive
+redrawing operation, and rubber-band drawing in the overlay plane.
+Using the overlay has the advantage that the rubber-band may be drawn
+and erased without damaging the image in the main plane, so costly
+redraws are avoided.
diff --git a/examples/opengl/overlay/globjwin.cpp b/examples/opengl/overlay/globjwin.cpp
new file mode 100644
index 0000000..8879b8d
--- /dev/null
+++ b/examples/opengl/overlay/globjwin.cpp
@@ -0,0 +1,57 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
+**
+** This file is part of an example program for Qt. This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+#include <qlayout.h>
+#include <qframe.h>
+#include <qmenubar.h>
+#include <qpopupmenu.h>
+#include <qapplication.h>
+#include <qmessagebox.h>
+#include "globjwin.h"
+#include "glteapots.h"
+
+
+GLObjectWindow::GLObjectWindow( QWidget* parent, const char* name )
+ : QWidget( parent, name )
+{
+ // Create a menu
+ QPopupMenu *file = new QPopupMenu( this );
+ file->insertItem( "Exit", qApp, SLOT(quit()), CTRL+Key_Q );
+
+ // Create a menu bar
+ QMenuBar *m = new QMenuBar( this );
+ m->setSeparator( QMenuBar::InWindowsStyle );
+ m->insertItem("&File", file );
+
+ // Create a nice frame to put around the OpenGL widget
+ QFrame* f = new QFrame( this, "frame" );
+ f->setFrameStyle( QFrame::Sunken | QFrame::Panel );
+ f->setLineWidth( 2 );
+
+ // Create our OpenGL widget.
+ GLTeapots* c = new GLTeapots( f, "glteapots" );
+
+ // Check if we obtained an overlay
+ if ( !c->format().hasOverlay() ) {
+ QMessageBox::warning( 0, qApp->argv()[0],
+ "Failed to get an OpenGL overlay",
+ "OK" );
+ }
+
+ // Now that we have all the widgets, put them into a nice layout
+
+ // Put the GL widget inside the frame
+ QHBoxLayout* flayout = new QHBoxLayout( f, 2, 2, "flayout");
+ flayout->addWidget( c, 1 );
+
+ // Top level layout
+ QVBoxLayout* hlayout = new QVBoxLayout( this, 20, 20, "hlayout");
+ hlayout->setMenuBar( m );
+ hlayout->addWidget( f, 1 );
+}
diff --git a/examples/opengl/overlay/globjwin.h b/examples/opengl/overlay/globjwin.h
new file mode 100644
index 0000000..46de98e
--- /dev/null
+++ b/examples/opengl/overlay/globjwin.h
@@ -0,0 +1,33 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
+**
+** This file is part of an example program for Qt. This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+
+/****************************************************************************
+**
+** The GLObjectWindow contains a GLBox and three sliders connected to
+** the GLBox's rotation slots.
+**
+****************************************************************************/
+
+#ifndef GLOBJWIN_H
+#define GLOBJWIN_H
+
+#include <qwidget.h>
+
+
+class GLObjectWindow : public QWidget
+{
+ Q_OBJECT
+public:
+ GLObjectWindow( QWidget* parent = 0, const char* name = 0 );
+
+
+};
+
+
+#endif // GLOBJWIN_H
diff --git a/examples/opengl/overlay/glteapots.cpp b/examples/opengl/overlay/glteapots.cpp
new file mode 100644
index 0000000..f3aaec1
--- /dev/null
+++ b/examples/opengl/overlay/glteapots.cpp
@@ -0,0 +1,457 @@
+/****************************************************************************
+**
+** Implementation of GLTeapots
+** This is a QGLWidget displaying a group of teapots and a rubber-band
+** in an overlay plane
+**
+** The OpenGL code in this example is mostly borrowed from the "teapots"
+** example program in the "OpenGL Programming Guide", by Jackie Neider,
+** Tom Davis, and Mason Woo, Addison Wesley 1993.
+** It can be obtained from ftp.sgi.com and contains the following copyright
+** notice:
+
+ * (c) Copyright 1993, Silicon Graphics, Inc.
+ * ALL RIGHTS RESERVED
+ * Permission to use, copy, modify, and distribute this software for
+ * any purpose and without fee is hereby granted, provided that the above
+ * copyright notice appear in all copies and that both the copyright notice
+ * and this permission notice appear in supporting documentation, and that
+ * the name of Silicon Graphics, Inc. not be used in advertising
+ * or publicity pertaining to distribution of the software without specific,
+ * written prior permission.
+ *
+ * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
+ * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
+ * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
+ * GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
+ * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
+ * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
+ * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
+ * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
+ * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
+ * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * US Government Users Restricted Rights
+ * Use, duplication, or disclosure by the Government is subject to
+ * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
+ * (c)(1)(ii) of the Rights in Technical Data and Computer Software
+ * clause at DFARS 252.227-7013 and/or in similar or successor
+ * clauses in the FAR or the DOD or NASA FAR Supplement.
+ * Unpublished-- rights reserved under the copyright laws of the
+ * United States. Contractor/manufacturer is Silicon Graphics,
+ * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
+ *
+ * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
+
+****************************************************************************/
+
+#include "glteapots.h"
+#include <qapplication.h>
+
+#if defined(Q_CC_MSVC)
+#pragma warning(disable:4305) // init: truncation from const double to float
+#endif
+
+/*!
+ Create a GLTeapots widget.
+
+ Specifies the following frame buffer requirements to the QGLWidget
+ constructor:
+ <ul>
+ <li> HasOverlay - we want an overlay context to draw the rubber-band in
+ <li> SingleBuffer - makes the drawing process of the teapots visible
+ </ul>
+*/
+
+
+GLTeapots::GLTeapots( QWidget* parent, const char* name )
+ : QGLWidget( QGLFormat( QGL::SingleBuffer | QGL::HasOverlay ),
+ parent, name )
+{
+ teapotList = 0;
+ rubberOn = FALSE;
+}
+
+/*!
+ Release allocated resources
+*/
+
+GLTeapots::~GLTeapots()
+{
+ makeCurrent();
+ glDeleteLists( teapotList, 1 );
+}
+
+
+/*!
+ Do the main plane painting: a set of teapots.
+*/
+
+void GLTeapots::paintGL()
+{
+ QApplication::setOverrideCursor( waitCursor ); // Since it takes some time
+
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ renderTeapot( 2.0, 17.0, 0.0215, 0.1745, 0.0215,
+ 0.07568, 0.61424, 0.07568,
+ 0.633, 0.727811, 0.633, 0.6 );
+ renderTeapot( 2.0, 14.0, 0.135, 0.2225, 0.1575,
+ 0.54, 0.89, 0.63, 0.316228,
+ 0.316228, 0.316228, 0.1 );
+ renderTeapot( 2.0, 11.0, 0.05375, 0.05, 0.06625,
+ 0.18275, 0.17, 0.22525,
+ 0.332741, 0.328634, 0.346435, 0.3 );
+ renderTeapot( 2.0, 8.0, 0.25, 0.20725, 0.20725,
+ 1, 0.829, 0.829, 0.296648,
+ 0.296648, 0.296648, 0.088 );
+ renderTeapot( 2.0, 5.0, 0.1745, 0.01175, 0.01175,
+ 0.61424, 0.04136, 0.04136,
+ 0.727811, 0.626959, 0.626959, 0.6);
+ renderTeapot( 2.0, 2.0, 0.1, 0.18725, 0.1745,
+ 0.396, 0.74151, 0.69102,
+ 0.297254, 0.30829, 0.306678, 0.1 );
+
+ renderTeapot( 6.0, 17.0, 0.329412, 0.223529, 0.027451,
+ 0.780392, 0.568627, 0.113725,
+ 0.992157, 0.941176, 0.807843, 0.21794872 );
+ renderTeapot( 6.0, 14.0, 0.2125, 0.1275, 0.054,
+ 0.714, 0.4284, 0.18144,
+ 0.393548, 0.271906, 0.166721, 0.2 );
+ renderTeapot( 6.0, 11.0, 0.25, 0.25, 0.25,
+ 0.4, 0.4, 0.4,
+ 0.774597, 0.774597, 0.774597, 0.6 );
+ renderTeapot( 6.0, 8.0, 0.19125, 0.0735, 0.0225,
+ 0.7038, 0.27048, 0.0828,
+ 0.256777, 0.137622, 0.086014, 0.1 );
+ renderTeapot( 6.0, 5.0, 0.24725, 0.1995, 0.0745,
+ 0.75164, 0.60648, 0.22648,
+ 0.628281, 0.555802, 0.366065, 0.4 );
+ renderTeapot( 6.0, 2.0, 0.19225, 0.19225, 0.19225,
+ 0.50754, 0.50754, 0.50754,
+ 0.508273, 0.508273, 0.508273, 0.4 );
+
+ renderTeapot( 10.0, 17.0, 0.0, 0.0, 0.0,
+ 0.01, 0.01, 0.01,
+ 0.50, 0.50, 0.50, .25 );
+ renderTeapot( 10.0, 14.0, 0.0, 0.1, 0.06,
+ 0.0, 0.50980392, 0.50980392,
+ 0.50196078, 0.50196078, 0.50196078, .25 );
+ renderTeapot( 10.0, 11.0, 0.0, 0.0, 0.0,
+ 0.1, 0.35, 0.1,
+ 0.45, 0.55, 0.45, .25 );
+ renderTeapot( 10.0, 8.0, 0.0, 0.0, 0.0,
+ 0.5, 0.0, 0.0,
+ 0.7, 0.6, 0.6, .25 );
+ renderTeapot( 10.0, 5.0, 0.0, 0.0, 0.0,
+ 0.55, 0.55, 0.55,
+ 0.70, 0.70, 0.70, .25 );
+ renderTeapot( 10.0, 2.0, 0.0, 0.0, 0.0,
+ 0.5, 0.5, 0.0,
+ 0.60, 0.60, 0.50, .25 );
+
+ renderTeapot( 14.0, 17.0, 0.02, 0.02, 0.02,
+ 0.01, 0.01, 0.01,
+ 0.4, 0.4, 0.4, .078125 );
+ renderTeapot( 14.0, 14.0, 0.0, 0.05, 0.05,
+ 0.4, 0.5, 0.5,
+ 0.04, 0.7, 0.7, .078125 );
+ renderTeapot( 14.0, 11.0, 0.0, 0.05, 0.0,
+ 0.4, 0.5, 0.4,
+ 0.04, 0.7, 0.04, .078125 );
+ renderTeapot( 14.0, 8.0, 0.05, 0.0, 0.0,
+ 0.5, 0.4, 0.4,
+ 0.7, 0.04, 0.04, .078125 );
+ renderTeapot( 14.0, 5.0, 0.05, 0.05, 0.05,
+ 0.5, 0.5, 0.5,
+ 0.7, 0.7, 0.7, .078125 );
+ renderTeapot( 14.0, 2.0, 0.05, 0.05, 0.0,
+ 0.5, 0.5, 0.4,
+ 0.7, 0.7, 0.04, .078125 );
+
+ // May add a glFinish() here to make sure the GL rendering has finished
+ // before the mouse cursor is reset from "waiting" to normal.
+ QApplication::restoreOverrideCursor();
+}
+
+
+/*!
+ Set up the OpenGL rendering state of the main plane
+*/
+
+void GLTeapots::initializeGL()
+{
+ GLfloat ambient[] = { 0.0, 0.0, 0.0, 1.0 };
+ GLfloat diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
+ GLfloat position[] = { 0.0, 3.0, 3.0, 0.0 };
+
+ GLfloat lmodel_ambient[] = { 0.2, 0.2, 0.2, 1.0 };
+ GLfloat local_view[] = { 0.0 };
+
+ glLightfv( GL_LIGHT0, GL_AMBIENT, ambient );
+ glLightfv( GL_LIGHT0, GL_DIFFUSE, diffuse );
+ glLightfv( GL_LIGHT0, GL_POSITION, position );
+ glLightModelfv( GL_LIGHT_MODEL_AMBIENT, lmodel_ambient );
+ glLightModelfv( GL_LIGHT_MODEL_LOCAL_VIEWER, local_view );
+
+ glFrontFace( GL_CW );
+ glEnable( GL_LIGHTING );
+ glEnable( GL_LIGHT0 );
+ glEnable( GL_AUTO_NORMAL );
+ glEnable( GL_NORMALIZE );
+ glEnable( GL_DEPTH_TEST );
+ glDepthFunc( GL_LESS );
+}
+
+
+
+/*!
+ Set up the main plane's view port, matrix mode, etc. suitably for
+ viewing the teapots.
+*/
+
+void GLTeapots::resizeGL( int w, int h )
+{
+ glViewport(0, 0, w, h);
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ if ( w <= h )
+ glOrtho( 0.0, 20.0, 0.0, 20.0*(GLfloat)h/(GLfloat)w, -10.0, 10.0 );
+ else
+ glOrtho( 0.0, 20.0*(GLfloat)w/(GLfloat)h, 0.0, 20.0, -10.0, 10.0 );
+ glMatrixMode(GL_MODELVIEW);
+}
+
+
+/*!
+ Set up the OpenGL rendering state of the overlay plane
+*/
+
+void GLTeapots::initializeOverlayGL()
+{
+ glLineWidth( 2 );
+ glLineStipple( 3, 0xAAAA );
+ glEnable( GL_LINE_STIPPLE );
+}
+
+
+/*!
+ Do the overlay plane painting: a rubber-band (if the user has
+ dragged out one).
+
+*/
+
+void GLTeapots::paintOverlayGL()
+{
+ glClear( GL_COLOR_BUFFER_BIT );
+ if ( rubberOn ) {
+ qglColor( QColor( 255, 255, 0 ) );
+ glBegin( GL_LINE_LOOP );
+ glVertex2i( rubberP1.x(), rubberP1.y() );
+ glVertex2i( rubberP2.x(), rubberP1.y() );
+ glVertex2i( rubberP2.x(), rubberP2.y() );
+ glVertex2i( rubberP1.x(), rubberP2.y() );
+ glEnd();
+ }
+}
+
+
+/*!
+ Set up the overlay plane's view port, matrix mode, etc. suitably for
+ viewing the rubber-band.
+*/
+
+void GLTeapots::resizeOverlayGL( int w, int h )
+{
+ glViewport( 0, 0, w, h );
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ gluOrtho2D( 0, w, h, 0 );
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+}
+
+
+/*!
+ User presses a mouse button: start pulling out a rubber-band rectangle
+*/
+
+// We do a simple rubber-band drawing here; erasing the whole overlay
+// plane for each repaint. For less flickering of the rubber-band
+// itself, we could remember the coordinates of the last rectangle
+// drawn, and then erase only that by painting it again with
+// transparent color.
+
+void GLTeapots::mousePressEvent( QMouseEvent* e )
+{
+ rubberP1 = e->pos();
+ rubberP2 = rubberP1;
+ rubberOn = TRUE;
+}
+
+/*!
+ User drags the mouse: Update the rubber-band coordinates and repaint
+ the overlay.
+*/
+
+void GLTeapots::mouseMoveEvent( QMouseEvent* e )
+{
+ if ( rubberOn ) {
+ rubberP2 = e->pos();
+ updateOverlayGL();
+ }
+}
+
+/*!
+ User releases the mouse button: remove the rubber-band.
+*/
+
+void GLTeapots::mouseReleaseEvent( QMouseEvent* )
+{
+ if ( rubberOn ) {
+ rubberOn = FALSE;
+ updateOverlayGL();
+ }
+}
+
+
+/*!
+ Renders a teapot with the given material properties
+*/
+
+void GLTeapots::renderTeapot( GLfloat x, GLfloat y, GLfloat ambr,
+ GLfloat ambg, GLfloat ambb, GLfloat difr,
+ GLfloat difg, GLfloat difb,
+ GLfloat specr, GLfloat specg,
+ GLfloat specb, GLfloat shine )
+{
+ float mat[4];
+
+ glPushMatrix();
+ glTranslatef (x, y, 0.0);
+ mat[0] = ambr; mat[1] = ambg; mat[2] = ambb; mat[3] = 1.0;
+ glMaterialfv (GL_FRONT, GL_AMBIENT, mat);
+ mat[0] = difr; mat[1] = difg; mat[2] = difb;
+ glMaterialfv (GL_FRONT, GL_DIFFUSE, mat);
+ mat[0] = specr; mat[1] = specg; mat[2] = specb;
+ glMaterialfv (GL_FRONT, GL_SPECULAR, mat);
+ glMaterialf (GL_FRONT, GL_SHININESS, shine*128.0);
+ teapot();
+ glPopMatrix();
+}
+
+
+/*!
+ Draw a classic OpenGL teapot
+*/
+
+void GLTeapots::teapot()
+{
+ static long patchdata[][16] = {
+ {102,103,104,105,4,5,6,7,8,9,10,11,12,13,14,15},
+ {12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27},
+ {24,25,26,27,29,30,31,32,33,34,35,36,37,38,39,40},
+ {96,96,96,96,97,98,99,100,101,101,101,101,0,1,2,3,},
+ {0,1,2,3,106,107,108,109,110,111,112,113,114,115,116,117},
+ {118,118,118,118,124,122,119,121,123,126,125,120,40,39,38,37},
+ {41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56},
+ {53,54,55,56,57,58,59,60,61,62,63,64,28,65,66,67},
+ {68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83},
+ {80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95}
+ };
+
+ static float cpdata[][3] = {
+ {0.2,0,2.7},{0.2,-0.112,2.7},{0.112,-0.2,2.7},{0,-0.2,2.7},
+ {1.3375,0,2.53125},{1.3375,-0.749,2.53125},{0.749,-1.3375,2.53125},
+ {0,-1.3375,2.53125},{1.4375,0,2.53125},{1.4375,-0.805,2.53125},
+ {0.805,-1.4375,2.53125},{0,-1.4375,2.53125},{1.5,0,2.4},
+ {1.5,-0.84,2.4},{0.84,-1.5,2.4},{0,-1.5,2.4},{1.75,0,1.875},
+ {1.75,-0.98,1.875},{0.98,-1.75,1.875},{0,-1.75,1.875},{2,0,1.35},
+ {2,-1.12,1.35},{1.12,-2,1.35},{0,-2,1.35},{2,0,0.9},{2,-1.12,0.9},
+ {1.12,-2,0.9},{0,-2,0.9},{-2,0,0.9},{2,0,0.45},{2,-1.12,0.45},
+ {1.12,-2,0.45},{0,-2,0.45},{1.5,0,0.225},{1.5,-0.84,0.225},
+ {0.84,-1.5,0.225},{0,-1.5,0.225},{1.5,0,0.15},{1.5,-0.84,0.15},
+ {0.84,-1.5,0.15},{0,-1.5,0.15},{-1.6,0,2.025},{-1.6,-0.3,2.025},
+ {-1.5,-0.3,2.25},{-1.5,0,2.25},{-2.3,0,2.025},{-2.3,-0.3,2.025},
+ {-2.5,-0.3,2.25},{-2.5,0,2.25},{-2.7,0,2.025},{-2.7,-0.3,2.025},
+ {-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},
+ {-3,0,1.8},{-2.7,0,1.575},{-2.7,-0.3,1.575},{-3,-0.3,1.35},{-3,0,1.35},
+ {-2.5,0,1.125},{-2.5,-0.3,1.125},{-2.65,-0.3,0.9375},{-2.65,0,0.9375},
+ {-2,-0.3,0.9},{-1.9,-0.3,0.6},{-1.9,0,0.6},{1.7,0,1.425},
+ {1.7,-0.66,1.425},{1.7,-0.66,0.6},{1.7,0,0.6},{2.6,0,1.425},
+ {2.6,-0.66,1.425},{3.1,-0.66,0.825},{3.1,0,0.825},{2.3,0,2.1},
+ {2.3,-0.25,2.1},{2.4,-0.25,2.025},{2.4,0,2.025},{2.7,0,2.4},
+ {2.7,-0.25,2.4},{3.3,-0.25,2.4},{3.3,0,2.4},{2.8,0,2.475},
+ {2.8,-0.25,2.475},{3.525,-0.25,2.49375},{3.525,0,2.49375},
+ {2.9,0,2.475},{2.9,-0.15,2.475},{3.45,-0.15,2.5125},{3.45,0,2.5125},
+ {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},
+ {0.8,0,3.15},{0.8,-0.45,3.15},{0.45,-0.8,3.15},{0,-0.8,3.15},
+ {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},
+ {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 );
+}
diff --git a/examples/opengl/overlay/glteapots.h b/examples/opengl/overlay/glteapots.h
new file mode 100644
index 0000000..11f4bef
--- /dev/null
+++ b/examples/opengl/overlay/glteapots.h
@@ -0,0 +1,62 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA. 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 QGLWidget displaying a group of teapots and a rubber-band
+** in an overlay plane
+**
+****************************************************************************/
+
+#ifndef GLBOX_H
+#define GLBOX_H
+
+#include <qgl.h>
+
+
+class GLTeapots : public QGLWidget
+{
+ Q_OBJECT
+
+public:
+
+ GLTeapots( QWidget* parent, const char* name );
+ ~GLTeapots();
+
+protected:
+
+ void initializeGL();
+ void paintGL();
+ void resizeGL( int w, int h );
+
+ void initializeOverlayGL();
+ void paintOverlayGL();
+ void resizeOverlayGL( int w, int h );
+
+ void mousePressEvent( QMouseEvent* e );
+ void mouseMoveEvent( QMouseEvent* e );
+ void mouseReleaseEvent( QMouseEvent* e );
+
+ void renderTeapot( GLfloat x, GLfloat y, GLfloat ambr,
+ GLfloat ambg, GLfloat ambb, GLfloat difr,
+ GLfloat difg, GLfloat difb,
+ GLfloat specr, GLfloat specg,
+ GLfloat specb, GLfloat shine );
+
+ void teapot();
+
+private:
+ GLuint teapotList;
+ QPoint rubberP1;
+ QPoint rubberP2;
+ bool rubberOn;
+};
+
+
+#endif // GLBOX_H
diff --git a/examples/opengl/overlay/main.cpp b/examples/opengl/overlay/main.cpp
new file mode 100644
index 0000000..2939ecb
--- /dev/null
+++ b/examples/opengl/overlay/main.cpp
@@ -0,0 +1,52 @@
+/****************************************************************************
+**
+** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
+**
+** This file is part of an example program for Qt. This example
+** program may be used, distributed and modified without limitation.
+**
+*****************************************************************************/
+//
+// Qt OpenGL example: Box
+//
+// A small example showing how a GLWidget can be used just as any Qt widget
+//
+// File: main.cpp
+//
+// The main() function
+//
+
+#include "globjwin.h"
+#include <qapplication.h>
+#include <qgl.h>
+#include <qmessagebox.h>
+
+/*
+ The main program is here.
+*/
+
+int main( int argc, char **argv )
+{
+ QApplication::setColorSpec( QApplication::CustomColor );
+ QApplication a(argc,argv);
+
+ if ( !QGLFormat::hasOpenGL() ) {
+ qWarning( "This system has no OpenGL support. Exiting." );
+ return -1;
+ }
+
+ // Check for existence of overlays
+ if ( !QGLFormat::hasOpenGLOverlays() ) {
+ QMessageBox::critical( 0, qApp->argv()[0],
+ "This system does not support OpenGL overlays",
+ "Exit" );
+ return 1;
+ }
+
+ GLObjectWindow w;
+ w.resize( 400, 350 );
+ a.setMainWidget( &w );
+
+ w.show();
+ return a.exec();
+}
diff --git a/examples/opengl/overlay/overlay.doc b/examples/opengl/overlay/overlay.doc
new file mode 100644
index 0000000..7a10b3c
--- /dev/null
+++ b/examples/opengl/overlay/overlay.doc
@@ -0,0 +1,16 @@
+/*! \page opengl-overlay-example.html
+
+ \ingroup opengl-examples
+ \title OpenGL Overlay Example
+
+This example demonstrates how to use OpenGL overlays with the Qt OpenGL
+Extension. It features a QGLWidget with a relatively expensive redrawing
+operation, and rubber-band drawing in the overlay plane. Using the
+overlay has the advantage that the rubber-band may be drawn and erased
+without damaging the image in the main plane, so costly redraws are
+avoided.
+
+See \c{$QTDIR/examples/opengl/overlay} for the source code.
+
+*/
+
diff --git a/examples/opengl/overlay/overlay.pro b/examples/opengl/overlay/overlay.pro
new file mode 100644
index 0000000..bc08165
--- /dev/null
+++ b/examples/opengl/overlay/overlay.pro
@@ -0,0 +1,14 @@
+TEMPLATE = app
+TARGET = overlay
+
+CONFIG += qt opengl warn_on release
+CONFIG -= dlopen_opengl
+DEPENDPATH = ../include
+
+REQUIRES = opengl
+
+HEADERS = glteapots.h \
+ globjwin.h
+SOURCES = glteapots.cpp \
+ globjwin.cpp \
+ main.cpp