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-rw-r--r--examples/qt3d/graphicsview/teapotitem.cpp129
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diff --git a/examples/qt3d/graphicsview/teapotitem.cpp b/examples/qt3d/graphicsview/teapotitem.cpp
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--- a/examples/qt3d/graphicsview/teapotitem.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
-** All rights reserved.
-** Contact: Nokia Corporation (qt-info@nokia.com)
-**
-** This file is part of the QtQuick3D examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** You may use this file under the terms of the BSD license as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-** * Redistributions of source code must retain the above copyright
-** notice, this list of conditions and the following disclaimer.
-** * Redistributions in binary form must reproduce the above copyright
-** notice, this list of conditions and the following disclaimer in
-** the documentation and/or other materials provided with the
-** distribution.
-** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
-** the names of its contributors may be used to endorse or promote
-** products derived from this software without specific prior written
-** permission.
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include "teapotitem.h"
-#include "qglpainter.h"
-#include "qplane3d.h"
-#include "qtriangle3d.h"
-#include <QtCore/qnumeric.h>
-
-TeapotItem::TeapotItem(QGraphicsItem *parent)
- : ModelItem(parent)
-{
- QGLBuilder builder;
- builder.newSection(QGL::Faceted);
- builder << teapot;
- teapotNode = builder.finalizedSceneNode();
-}
-
-TeapotItem::~TeapotItem()
-{
- delete teapotNode;
-}
-
-void TeapotItem::paintGL(QGLPainter *painter)
-{
- GLuint textureId = this->textureId();
- if (textureId) {
- glDisable(GL_DEPTH_TEST);
- glEnable(GL_BLEND);
- painter->setFaceColor(QGL::AllFaces, QColor(0, 0, 0, 200));
- painter->setStandardEffect(QGL::LitDecalTexture2D);
- glBindTexture(GL_TEXTURE_2D, textureId);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- if (painter->isFixedFunction())
- glEnable(GL_TEXTURE_2D);
- glCullFace(GL_FRONT);
- glEnable(GL_CULL_FACE);
- teapotNode->draw(painter);
- glCullFace(GL_BACK);
- teapotNode->draw(painter);
- glDisable(GL_CULL_FACE);
- glBindTexture(GL_TEXTURE_2D, 0);
- if (painter->isFixedFunction())
- glDisable(GL_TEXTURE_2D);
- } else {
- painter->setStandardEffect(QGL::LitMaterial);
- teapotNode->draw(painter);
- }
-}
-
-QPointF TeapotItem::intersection(const QRay3D &ray, int *actualFace) const
-{
- QVector2D tc;
- QGLBezierPatches patches = teapot.transformed(camera()->modelViewMatrix());
- if (pressedFace() == -1) {
- // Intersect with the whole teapot.
- qreal t = patches.intersection(ray, &tc, actualFace);
- if (!qIsNaN(t))
- return QPointF(tc.x(), tc.y());
- } else {
- // Only intersect with the patch that was pressed previously.
- QGLBezierPatches subpatches;
- subpatches.setPositions
- (patches.positions().mid(pressedFace() * 16, 16));
- qreal t = subpatches.intersection(ray, &tc);
- if (!qIsNaN(t)) {
- *actualFace = pressedFace();
- return QPointF(tc.x(), tc.y());
- }
-
- // The mouse has moved outside the boundary of the patch.
- // Use the plane containing the patch to extend the hit
- // area out to infinity.
- QTriangle3D triangle(subpatches.positions()[0],
- subpatches.positions()[3],
- subpatches.positions()[12]);
- t = triangle.plane().intersection(ray);
- if (!qIsNaN(t)) {
- *actualFace = pressedFace();
- QVector2D uv = triangle.uv(ray.point(t));
- QVector2D tc1(0, 0);
- QVector2D tc2(1, 0);
- QVector2D tc3(0, 1);
- QVector2D tc =
- uv.x() * tc1 + uv.y() * tc2 + (1 - uv.x() - uv.y()) * tc3;
- return QPointF(tc.x(), tc.y());
- }
- }
- *actualFace = -1;
- return QPointF();
-}