QT Graphics-View 3D编程例子- 3D Model Viewer
学习在Graphics-View框架中使用opengl进行3D编程,在网上找了一个不错的例子“3D Model Viewer”,很值得学习。
可以在http://www.oyonale.com/accueil.php?lang=en上下载一些3D模型来测试!
先来一张该例子的截图,看下效果:
该例子使用Graphics-View框架,绘制一个表示太阳的图元(item);
并在窗口的左上角区域放置了一个2D Widget控制以及说明面板(可以加载不同的3D模型,改变颜色,网格、法向量显示等!);
通过加载obj模型文件,使用opengl在背景层绘制3D图形,并可以使用鼠标进行控制,但是一次性只能加载一个3D图形。
相关代码如下:
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/****************************************************************************
** ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies). ** Contact: Qt Software Information (qt-info@nokia.com) ** ** This file is part of the documentation of Qt. It was originally ** published as part of Qt Quarterly. ** ** Commercial Usage ** Licensees holding valid Qt Commercial licenses may use this file in ** accordance with the Qt Commercial License Agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and Nokia. ** ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License versions 2.0 or 3.0 as published by the Free ** Software Foundation and appearing in the file LICENSE.GPL included in ** the packaging of this file. Please review the following information ** to ensure GNU General Public Licensing requirements will be met: ** http://www.fsf.org/licensing/licenses/info/GPLv2.html and ** http://www.gnu.org/copyleft/gpl.html. In addition, as a special ** exception, Nokia gives you certain additional rights. These rights ** are described in the Nokia Qt GPL Exception version 1.3, included in ** the file GPL_EXCEPTION.txt in this package. ** ** Qt for Windows(R) Licensees ** As a special exception, Nokia, as the sole copyright holder for Qt ** Designer, grants users of the Qt/Eclipse Integration plug-in the ** right for the Qt/Eclipse Integration to link to functionality ** provided by Qt Designer and its related libraries. ** ** If you are unsure which license is appropriate for your use, please ** contact the sales department at qt-sales@nokia.com. ** ****************************************************************************/ #ifndef MODEL_H #include <QString> #include <math.h> #include "point3d.h" class Model void render(bool wireframe = false, bool normals = false) const; QString fileName() const private: #endif |
OpenGLScene.h - 使用了opengl渲染的场景
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/****************************************************************************
** ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies). ** Contact: Qt Software Information (qt-info@nokia.com) ** ** This file is part of the documentation of Qt. It was originally ** published as part of Qt Quarterly. ** ** Commercial Usage ** Licensees holding valid Qt Commercial licenses may use this file in ** accordance with the Qt Commercial License Agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and Nokia. ** ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License versions 2.0 or 3.0 as published by the Free ** Software Foundation and appearing in the file LICENSE.GPL included in ** the packaging of this file. Please review the following information ** to ensure GNU General Public Licensing requirements will be met: ** http://www.fsf.org/licensing/licenses/info/GPLv2.html and ** http://www.gnu.org/copyleft/gpl.html. In addition, as a special ** exception, Nokia gives you certain additional rights. These rights ** are described in the Nokia Qt GPL Exception version 1.3, included in ** the file GPL_EXCEPTION.txt in this package. ** ** Qt for Windows(R) Licensees ** As a special exception, Nokia, as the sole copyright holder for Qt ** Designer, grants users of the Qt/Eclipse Integration plug-in the ** right for the Qt/Eclipse Integration to link to functionality ** provided by Qt Designer and its related libraries. ** ** If you are unsure which license is appropriate for your use, please ** contact the sales department at qt-sales@nokia.com. ** ****************************************************************************/ #ifndef OPENGLSCENE_H #include "point3d.h" #include <QGraphicsScene> #ifndef QT_NO_CONCURRENT class Model; class OpenGLScene : public QGraphicsScene public: void drawBackground(QPainter *painter, const QRectF &rect); public slots: protected: private: void setModel(Model *model); bool m_wireframeEnabled; QColor m_modelColor; Model *m_model; QTime m_time; float m_distance; QLabel *m_labels[]; QGraphicsRectItem *m_lightItem; #ifndef QT_NO_CONCURRENT #endif |
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/****************************************************************************
** ** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies). ** Contact: Qt Software Information (qt-info@nokia.com) ** ** This file is part of the documentation of Qt. It was originally ** published as part of Qt Quarterly. ** ** Commercial Usage ** Licensees holding valid Qt Commercial licenses may use this file in ** accordance with the Qt Commercial License Agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and Nokia. ** ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License versions 2.0 or 3.0 as published by the Free ** Software Foundation and appearing in the file LICENSE.GPL included in ** the packaging of this file. Please review the following information ** to ensure GNU General Public Licensing requirements will be met: ** http://www.fsf.org/licensing/licenses/info/GPLv2.html and ** http://www.gnu.org/copyleft/gpl.html. In addition, as a special ** exception, Nokia gives you certain additional rights. These rights ** are described in the Nokia Qt GPL Exception version 1.3, included in ** the file GPL_EXCEPTION.txt in this package. ** ** Qt for Windows(R) Licensees ** As a special exception, Nokia, as the sole copyright holder for Qt ** Designer, grants users of the Qt/Eclipse Integration plug-in the ** right for the Qt/Eclipse Integration to link to functionality ** provided by Qt Designer and its related libraries. ** ** If you are unsure which license is appropriate for your use, please ** contact the sales department at qt-sales@nokia.com. ** ****************************************************************************/ #ifndef POINT3D_H #include "math.h" #include <qglobal.h> struct Point3d Point3d() Point3d(float x_, float y_, float z_) Point3d operator+(const Point3d &p) const Point3d operator-(const Point3d &p) const Point3d operator*(float f) const Point3d &operator+=(const Point3d &p) Point3d &operator-=(const Point3d &p) Point3d &operator*=(float f) Point3d normalize() const const float &operator[](unsigned int index) const { inline float dot(const Point3d &a, const Point3d &b) inline Point3d cross(const Point3d &a, const Point3d &b) #endif |
主函数调用:
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#include "openglscene.h"
#include <QApplication> #include <QObject> #include <QGLWidget> #include <QGraphicsView> #include <QResizeEvent> class GraphicsView : public QGraphicsView protected: int main(int argc, char **argv) GraphicsView view; view.resize(, ); return app.exec(); |
其它3D图形欣赏:
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