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Diffstat (limited to 'examples/opengl/pbuffers/cube.cpp')
| -rw-r--r-- | examples/opengl/pbuffers/cube.cpp | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/examples/opengl/pbuffers/cube.cpp b/examples/opengl/pbuffers/cube.cpp new file mode 100644 index 0000000..0f6d15f --- /dev/null +++ b/examples/opengl/pbuffers/cube.cpp @@ -0,0 +1,332 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "cube.h" +#include "glwidget.h" + +#include <QtGui/QImage> +#include <QtCore/QPropertyAnimation> + +static const qreal FACE_SIZE = 0.4; + +static const qreal speeds[] = { 1.8f, 2.4f, 3.6f }; +static const qreal amplitudes[] = { 2.0f, 2.5f, 3.0f }; + +static inline void qSetColor(float colorVec[], QColor c) +{ + colorVec[0] = c.redF(); + colorVec[1] = c.greenF(); + colorVec[2] = c.blueF(); + colorVec[3] = c.alphaF(); +} + +int Geometry::append(const QVector3D &a, const QVector3D &n, const QVector2D &t) +{ + int v = vertices.count(); + vertices.append(a); + normals.append(n); + texCoords.append(t); + faces.append(v); + colors.append(QVector4D(0.6f, 0.6f, 0.6f, 1.0f)); + return v; +} + +void Geometry::addQuad(const QVector3D &a, const QVector3D &b, + const QVector3D &c, const QVector3D &d, + const QVector<QVector2D> &tex) +{ + QVector3D norm = QVector3D::normal(a, b, c); + // append first triangle + int aref = append(a, norm, tex[0]); + append(b, norm, tex[1]); + int cref = append(c, norm, tex[2]); + // append second triangle + faces.append(aref); + faces.append(cref); + append(d, norm, tex[3]); +} + +void Geometry::loadArrays() const +{ + glEnableClientState(GL_VERTEX_ARRAY); + glEnableClientState(GL_NORMAL_ARRAY); + glEnableClientState(GL_TEXTURE_COORD_ARRAY); + glEnableClientState(GL_COLOR_ARRAY); + glVertexPointer(3, GL_FLOAT, 0, vertices.constData()); + glNormalPointer(GL_FLOAT, 0, normals.constData()); + glTexCoordPointer(2, GL_FLOAT, 0, texCoords.constData()); + glColorPointer(4, GL_FLOAT, 0, colors.constData()); +} + +void Geometry::setColors(int start, GLfloat colorArray[4][4]) +{ + int off = faces[start]; + for (int i = 0; i < 4; ++i) + colors[i + off] = QVector4D(colorArray[i][0], + colorArray[i][1], + colorArray[i][2], + colorArray[i][3]); +} + +Tile::Tile(const QVector3D &loc) + : location(loc) + , start(0) + , count(0) + , useFlatColor(false) + , geom(0) +{ + qSetColor(faceColor, QColor(Qt::darkGray)); +} + +void Tile::setColors(GLfloat colorArray[4][4]) +{ + useFlatColor = true; + geom->setColors(start, colorArray); +} + +static inline void qMultMatrix(const QMatrix4x4 &mat) +{ + if (sizeof(qreal) == sizeof(GLfloat)) + glMultMatrixf((GLfloat*)mat.constData()); +#ifndef QT_OPENGL_ES + else if (sizeof(qreal) == sizeof(GLdouble)) + glMultMatrixd((GLdouble*)mat.constData()); +#endif + else + { + GLfloat fmat[16]; + qreal const *r = mat.constData(); + for (int i = 0; i < 16; ++i) + fmat[i] = r[i]; + glMultMatrixf(fmat); + } +} + +void Tile::draw() const +{ + QMatrix4x4 mat; + mat.translate(location); + mat.rotate(orientation); + glMatrixMode(GL_MODELVIEW); + glPushMatrix(); + qMultMatrix(mat); + glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, faceColor); + glDrawElements(GL_TRIANGLES, count, GL_UNSIGNED_SHORT, geom->indices() + start); + glPopMatrix(); +} + +TileBuilder::TileBuilder(Geometry *g, qreal depth, qreal size) + : verts(4) + , tex(4) + , start(g->count()) + , count(0) + , geom(g) +{ + // front face - make a square with bottom-left at origin + verts[br].setX(size); + verts[tr].setX(size); + verts[tr].setY(size); + verts[tl].setY(size); + + // these vert numbers are good for the tex-coords + for (int i = 0; i < 4; ++i) + tex[i] = verts[i].toVector2D(); + + // now move verts half cube width across so cube is centered on origin + for (int i = 0; i < 4; ++i) + verts[i] -= QVector3D(size / 2.0f, size / 2.0f, -depth); + + // add the front face + g->addQuad(verts[bl], verts[br], verts[tr], verts[tl], tex); + + count = g->count() - start; +} + +void TileBuilder::initialize(Tile *tile) const +{ + tile->start = start; + tile->count = count; + tile->geom = geom; + qSetColor(tile->faceColor, color); +} + +Tile *TileBuilder::newTile(const QVector3D &loc) const +{ + Tile *tile = new Tile(loc); + initialize(tile); + return tile; +} + +Cube::Cube(const QVector3D &loc) + : Tile(loc) + , rot(0.0f) + , r(0), a(0) +{ +} + +Cube::~Cube() +{ +} + +void Cube::setAltitude(qreal a) +{ + if (location.y() != a) + { + location.setY(a); + emit changed(); + } +} + +void Cube::setRange(qreal r) +{ + if (location.x() != r) + { + location.setX(r); + emit changed(); + } +} + +void Cube::setRotation(qreal r) +{ + if (r != rot) + { + orientation = QQuaternion::fromAxisAndAngle(QVector3D(1.0f, 1.0f, 1.0f), r); + emit changed(); + } +} + +void Cube::removeBounce() +{ + delete a; + a = 0; + delete r; + r = 0; +} + +void Cube::startAnimation() +{ + if (r) + { + r->start(); + r->setCurrentTime(startx); + } + if (a) + a->start(); + if (rtn) + rtn->start(); +} + +void Cube::setAnimationPaused(bool paused) +{ + if (paused) + { + if (r) + r->pause(); + if (a) + a->pause(); + if (rtn) + rtn->pause(); + } + else + { + if (r) + r->resume(); + if (a) + a->resume(); + if (rtn) + rtn->resume(); + } +} + +CubeBuilder::CubeBuilder(Geometry *g, qreal depth, qreal size) + : TileBuilder(g, depth) + , ix(0) +{ + for (int i = 0; i < 4; ++i) + verts[i].setZ(size / 2.0f); + // back face - "extrude" verts down + QVector<QVector3D> back(verts); + for (int i = 0; i < 4; ++i) + back[i].setZ(-size / 2.0f); + + // add the back face + g->addQuad(back[br], back[bl], back[tl], back[tr], tex); + + // add the sides + g->addQuad(back[bl], back[br], verts[br], verts[bl], tex); + g->addQuad(back[br], back[tr], verts[tr], verts[br], tex); + g->addQuad(back[tr], back[tl], verts[tl], verts[tr], tex); + g->addQuad(back[tl], back[bl], verts[bl], verts[tl], tex); + + count = g->count() - start; +} + +Cube *CubeBuilder::newCube(const QVector3D &loc) const +{ + Cube *c = new Cube(loc); + initialize(c); + qreal d = 4000.0f; + qreal d3 = d / 3.0f; + // Animate movement from left to right + c->r = new QPropertyAnimation(c, "range"); + c->r->setStartValue(-1.3f); + c->r->setEndValue(1.3f); + c->startx = ix * d3 * 3.0f; + c->r->setDuration(d * 4.0f); + c->r->setLoopCount(-1); + c->r->setEasingCurve(QEasingCurve(QEasingCurve::CosineCurve)); + // Animate movement from bottom to top + c->a = new QPropertyAnimation(c, "altitude"); + c->a->setEndValue(loc.y()); + c->a->setStartValue(loc.y() + amplitudes[ix]); + c->a->setDuration(d / speeds[ix]); + c->a->setLoopCount(-1); + c->a->setEasingCurve(QEasingCurve(QEasingCurve::CosineCurve)); + // Animate rotation + c->rtn = new QPropertyAnimation(c, "rotation"); + c->rtn->setStartValue(c->rot); + c->rtn->setEndValue(359.0f); + c->rtn->setDuration(d * 2.0f); + c->rtn->setLoopCount(-1); + c->rtn->setDuration(d / 2); + ix = (ix + 1) % 3; + return c; +} |