/usr/share/openscenegraph/examples/osgclip/osgclip.cpp is in openscenegraph-examples 3.2.0~rc1-4.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 | /* OpenSceneGraph example, osgclip.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <osg/MatrixTransform>
#include <osg/ClipNode>
#include <osg/Billboard>
#include <osg/Geode>
#include <osg/Group>
#include <osg/Notify>
#include <osg/Material>
#include <osg/PolygonOffset>
#include <osg/PolygonMode>
#include <osg/LineStipple>
#include <osg/AnimationPath>
#include <osgDB/Registry>
#include <osgDB/ReadFile>
#include <osgGA/TrackballManipulator>
#include <osgGA/FlightManipulator>
#include <osgGA/DriveManipulator>
#include <osgViewer/Viewer>
#include <osgUtil/Optimizer>
osg::Node* decorate_with_clip_node(osg::Node* subgraph)
{
osg::Group* rootnode = new osg::Group;
// create wireframe view of the model so the user can see
// what parts are being culled away.
osg::StateSet* stateset = new osg::StateSet;
//osg::Material* material = new osg::Material;
osg::PolygonMode* polymode = new osg::PolygonMode;
polymode->setMode(osg::PolygonMode::FRONT_AND_BACK,osg::PolygonMode::LINE);
stateset->setAttributeAndModes(polymode,osg::StateAttribute::OVERRIDE|osg::StateAttribute::ON);
osg::Group* wireframe_subgraph = new osg::Group;
wireframe_subgraph->setStateSet(stateset);
wireframe_subgraph->addChild(subgraph);
rootnode->addChild(wireframe_subgraph);
/*
// simple approach to adding a clipnode above a subrgaph.
// create clipped part.
osg::ClipNode* clipped_subgraph = new osg::ClipNode;
osg::BoundingSphere bs = subgraph->getBound();
bs.radius()*= 0.4f;
osg::BoundingBox bb;
bb.expandBy(bs);
clipped_subgraph->createClipBox(bb);
clipped_subgraph->addChild(subgraph);
rootnode->addChild(clipped_subgraph);
*/
// more complex approach to managing ClipNode, allowing
// ClipNode node to be transformed independantly from the subgraph
// that it is clipping.
osg::MatrixTransform* transform= new osg::MatrixTransform;
osg::NodeCallback* nc = new osg::AnimationPathCallback(subgraph->getBound().center(),osg::Vec3(0.0f,0.0f,1.0f),osg::inDegrees(45.0f));
transform->setUpdateCallback(nc);
osg::ClipNode* clipnode = new osg::ClipNode;
osg::BoundingSphere bs = subgraph->getBound();
bs.radius()*= 0.4f;
osg::BoundingBox bb;
bb.expandBy(bs);
clipnode->createClipBox(bb);
clipnode->setCullingActive(false);
transform->addChild(clipnode);
rootnode->addChild(transform);
// create clipped part.
osg::Group* clipped_subgraph = new osg::Group;
clipped_subgraph->setStateSet(clipnode->getStateSet());
clipped_subgraph->addChild(subgraph);
rootnode->addChild(clipped_subgraph);
return rootnode;
}
int main( int argc, char **argv )
{
// use an ArgumentParser object to manage the program arguments.
osg::ArgumentParser arguments(&argc,argv);
// load the nodes from the commandline arguments.
osg::Node* loadedModel = osgDB::readNodeFiles(arguments);
// if not loaded assume no arguments passed in, try use default mode instead.
if (!loadedModel) loadedModel = osgDB::readNodeFile("cow.osgt");
if (!loadedModel)
{
osg::notify(osg::NOTICE)<<"Please specifiy a filename and the command line"<<std::endl;
return 1;
}
// decorate the scenegraph with a clip node.
osg::Node* rootnode = decorate_with_clip_node(loadedModel);
// run optimization over the scene graph
osgUtil::Optimizer optimzer;
optimzer.optimize(rootnode);
osgViewer::Viewer viewer;
// set the scene to render
viewer.setSceneData(rootnode);
return viewer.run();
}
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