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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the Qt3D 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 "builder.h"
#include "qglbuilder.h"
#include "qglmaterialcollection.h"
#include "qgltexture2d.h"
#include "qglmaterial.h"
#include "qglscenenode.h"
#include "qgllightmodel.h"
#include <QtGui/qmatrix4x4.h>
#include <QtCore/qmath.h>
BuilderView::BuilderView(QWindow *parent)
: QGLView(parent)
, canScene(new QGLSceneNode(this))
{
//! [0]
QGLSceneNode *can = buildGeometry();
canScene->addNode(can);
{
// rotate the can around so its label shows; and down
// so the base is facing down
QMatrix4x4 mat;
QQuaternion q1 = QQuaternion::fromAxisAndAngle(1.0f, 0.0f, 0.0f, 270.0f);
QQuaternion q2 = QQuaternion::fromAxisAndAngle(0.0f, 1.0f, 0.0f, 100.0f);
mat.rotate(q2 * q1);
can->setLocalTransform(mat);
}
// display a copy of the can to the left
QGLSceneNode *node = new QGLSceneNode(canScene);
node->addNode(can);
{
QMatrix4x4 mat;
mat.translate(-2.0f, 0.0f, -2.0f);
node->setLocalTransform(mat);
}
// display a copy of the can to the right
node = new QGLSceneNode(canScene);
node->addNode(can);
{
QMatrix4x4 mat;
mat.translate(2.0f, 0.0f, -2.0f);
node->setLocalTransform(mat);
}
//! [0]
// rotate the whole scene about x-axis so that
// can tops are visible when scene is first displayed
{
QMatrix4x4 mat;
mat.rotate(1.0f, 0.0f, 0.0f, -30.0f);
canScene->setLocalTransform(mat);
}
}
BuilderView::~BuilderView()
{
delete canScene;
}
void BuilderView::initializeGL(QGLPainter *painter)
{
QGLLightParameters *light0 = new QGLLightParameters(this);
light0->setAmbientColor(Qt::white);
light0->setDiffuseColor(Qt::white);
light0->setDirection(QVector3D(0.0f, 0.2f, 2.0f));
painter->setMainLight(light0);
QGLLightModel *model = new QGLLightModel(this);
model->setAmbientSceneColor(Qt::white);
painter->setLightModel(model);
}
//! [1]
void BuilderView::paintGL(QGLPainter *painter)
{
canScene->draw(painter);
}
//! [1]
QGLSceneNode *BuilderView::buildGeometry()
{
//! [2]
QGLBuilder builder;
QGLSceneNode *root = builder.sceneNode();
QGLMaterial *mat = new QGLMaterial;
mat->setAmbientColor(Qt::lightGray);
mat->setDiffuseColor(Qt::lightGray);
QUrl url;
url.setPath(QLatin1String(":/images/qt-soup.png"));
url.setScheme(QLatin1String("file"));
mat->setTextureUrl(url);
int canMat = root->palette()->addMaterial(mat);
root->setMaterialIndex(canMat);
root->setEffect(QGL::LitMaterial);
//! [2]
// size data for can
const qreal canRadius = 1.0f;
const qreal canHeight = 2.5f;
const int numSlices = 32;
QGeometryData canRim;
QVector3D canExtrudeVec(0.0f, 0.0f, -canHeight);
// do the math for the defining points
for (int i = 0; i < numSlices; ++i)
{
qreal angle = (qreal(i) * 2.0 * M_PI) / numSlices;
canRim.appendVertex(QVector3D(canRadius * qCos(angle),
canRadius * qSin(angle),
canHeight / 2.0f));
}
//! [3]
// create the flat top lid of the can
builder.newSection();
builder.currentNode()->setObjectName(QLatin1String("CanTop"));
QGeometryData top;
top.appendVertex(canRim.center());
top.appendVertexArray(canRim.vertices());
builder.addTriangulatedFace(top);
// create the sides of the can
builder.newSection();
builder.currentNode()->setObjectName(QLatin1String("CanSides"));
builder.currentNode()->setMaterialIndex(canMat);
builder.currentNode()->setEffect(QGL::LitModulateTexture2D);
QGeometryData canTop = canRim;
canTop.detach();
canTop.appendVertex(canTop.vertex(0)); // doubled vert for texture seam
canTop.generateTextureCoordinates(); // generate x texture coords
QGeometryData canBase = canTop.translated(canExtrudeVec); // base has tex.y == 0
for (int i = 0; i < canTop.count(); ++i)
canTop.texCoord(i).setY(1.0); // top has tex.y == 1
builder.addQuadsInterleaved(canTop, canBase);
// create the flat bottom lid of the can
builder.newSection();
builder.currentNode()->setObjectName(QLatin1String("CanBottom"));
builder.currentNode()->setEffect(QGL::LitMaterial);
QGeometryData rimReversed = canRim.translated(canExtrudeVec).reversed();
QGeometryData canBottom;
canBottom.appendVertex(rimReversed.center());
canBottom.appendVertexArray(rimReversed.vertices());
builder.addTriangulatedFace(canBottom);
return builder.finalizedSceneNode();
//! [3]
}
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