OsgOSG利用DrawPixels实现裁剪(Qt5.14.2+osgE3.6.5+win10)No26DrawPixels

相关资料：

https://blog.csdn.net/wb175208/article/details/88551782

实例代表：

.pro

 1 QT       += core gui widgets
 2 QT       += opengl
 3 TARGET = TestOsgQt
 4 TEMPLATE = app
 5 DEFINES += QT_DEPRECATED_WARNINGS
 6 CONFIG += c++11
 7 
 8 SOURCES += \
 9         main.cpp
10 
11 HEADERS +=
12 
13 OsgDir = D:\\Gitee\\osg365R
14 CONFIG(release, debug|release) {
15         LIBS += -L$${OsgDir}/lib/ -losgDB -losgViewer -lOpenThreads -losgAnimation -losg \
16                                   -losgEarth -losgEarthAnnotation -losgEarthFeatures -losgEarthSymbology -losgEarthUtil \
17                                   -losgQOpenGL -losgUtil -losgText -losgTerrain -losgSim \
18                                   -losgShadow -losgParticle -losgManipulator -losgGA -losgFX \
19                                   -losgWidget
20 } else {
21         LIBS += -L$${OsgDir}/debug/lib/ -losgDBd -losgViewerd -lOpenThreadsd -losgAnimationd -losgd \
22                                   -losgEarthd -losgEarthAnnotationd -losgEarthFeaturesd -losgEarthSymbologyd -losgEarthUtild \
23                                   -losgQOpenGLd -losgUtild -losgTextd -losgTerraind -losgSimd \
24                                   -losgShadowd -losgParticled -losgManipulatord -losgGAd -losgFXd \
25 }
26 
27 LIBS += -lOpenGL32
28 LIBS += -lGlU32
29 
30 INCLUDEPATH += $${OsgDir}/include
31 DEPENDPATH += $${OsgDir}/include

View Code

main.cpp

 1 #include <QApplication>
 2 
 3 #include <osg/Node>
 4 #include <osg/Group>
 5 #include <osg/Geode>
 6 #include <osg/Geometry>
 7 #include <osg/Texture2D>
 8 #include <osg/StateSet>
 9 #include <osg/PositionAttitudeTransform>
10 #include <osgViewer/Viewer>
11 #include <osgDB/ReadFile>
12 #include <osgParticle/PrecipitationEffect>
13 // 雨雪效果
14 #include <osg/MatrixTransform>
15 // 粒子效果
16 #include <osgParticle/PrecipitationEffect>
17 #include <osgParticle/Particle>
18 #include <osgParticle/LinearInterpolator>
19 #include <osgParticle/ParticleSystem>
20 #include <osgParticle/RandomRateCounter>
21 #include <osgParticle/PointPlacer>
22 #include <osgParticle/RadialShooter>
23 #include <osgParticle/ModularEmitter>
24 #include <osgParticle/ParticleSystemUpdater>
25 #include <osgParticle/ModularProgram>
26 #include <osgUtil/Optimizer>
27 #include <osgUtil/Simplifier>
28 #include <osgParticle/FireEffect>
29 // 雾
30 #include <osg/Fog>
31 #include <osgDB/ReadFile>
32 #include <osgViewer/Viewer>
33 #include <osg/StateSet>
34 #include <osg/StateAttribute>
35 #include <osgViewer/ViewerEventHandlers>
36 #include <osgWidget/ViewerEventHandlers>
37 // 裁剪
38 #include <osg/DrawPixels>
39 //
40 #include <QDebug>
41 
42 int main(int argc, char *argv[])
43 {
44     osg::ref_ptr<osg::Group> root = new osg::Group;
45     osg::ref_ptr<osg::Geode> geode = new osg::Geode;
46 
47     osg::ref_ptr<osg::DrawPixels> image = new osg::DrawPixels;
48     image->setPosition(osg::Vec3(0.0, 0.0, 0.0));
49     //裁剪区域
50     image->setSubImageDimensions(200, 200, 200, 200);
51     image->setImage(osgDB::readImageFile("D:\\Gitee\\data\\1.jpg"));
52 
53     geode->addChild(image);
54     root->addChild(geode);
55 
56     osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer();
57     viewer->addEventHandler(new osgViewer::WindowSizeHandler());
58     viewer->setSceneData(root.get());
59     viewer->setUpViewInWindow(50,50,500,400);
60 
61     viewer->realize();
62     viewer->run();
63 }

View Code

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原文地址：https://www.cnblogs.com/FKdelphi/p/16577149.html