6a67be2e32
forcing users to use osgDB::readRef*File() methods. The later is preferable as it closes a potential threading bug when using paging databases in conjunction
with the osgDB::Registry Object Cache. This threading bug occurs when one thread gets an object from the Cache via an osgDB::read*File() call where only
a pointer to the object is passed back, so taking a reference to the object is delayed till it gets reassigned to a ref_ptr<>, but at the same time another
thread calls a flush of the Object Cache deleting this object as it's referenceCount is now zero. Using osgDB::readREf*File() makes sure the a ref_ptr<> is
passed back and the referenceCount never goes to zero.
To ensure the OSG builds when OSG_PROVIDE_READFILE is to OFF the many cases of osgDB::read*File() usage had to be replaced with a ref_ptr<> osgDB::readRef*File()
usage. The avoid this change causing lots of other client code to be rewritten to handle the use of ref_ptr<> in place of C pointer I introduced a serious of
templte methods in various class to adapt ref_ptr<> to the underly C pointer to be passed to old OSG API's, example of this is found in include/osg/Group:
bool addChild(Node* child); // old method which can only be used with a Node*
tempalte<class T> bool addChild(const osg::ref_ptr<T>& child) { return addChild(child.get()); } // adapter template method
These changes together cover 149 modified files, so it's a large submission. This extent of changes are warrent to make use of the Object Cache
and multi-threaded loaded more robust.
git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/branches/OpenSceneGraph-3.4@15165 16af8721-9629-0410-8352-f15c8da7e697
120 lines
4.8 KiB
C++
120 lines
4.8 KiB
C++
/* OpenSceneGraph example, osgscribe.
|
|
*
|
|
* 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/Geode>
|
|
#include <osg/Group>
|
|
#include <osg/Notify>
|
|
#include <osg/Material>
|
|
#include <osg/PolygonOffset>
|
|
#include <osg/PolygonMode>
|
|
#include <osg/LineStipple>
|
|
|
|
#include <osgDB/Registry>
|
|
#include <osgDB/ReadFile>
|
|
|
|
#include <osgViewer/Viewer>
|
|
|
|
#include <osgUtil/Optimizer>
|
|
|
|
int main( int argc, char **argv )
|
|
{
|
|
// use an ArgumentParser object to manage the program arguments.
|
|
osg::ArgumentParser arguments(&argc,argv);
|
|
|
|
// construct the viewer.
|
|
osgViewer::Viewer viewer;
|
|
|
|
// load the nodes from the commandline arguments.
|
|
osg::ref_ptr<osg::Node> loadedModel = osgDB::readRefNodeFiles(arguments);
|
|
|
|
// if not loaded assume no arguments passed in, try use default mode instead.
|
|
if (!loadedModel) loadedModel = osgDB::readRefNodeFile("cow.osgt");
|
|
|
|
if (!loadedModel)
|
|
{
|
|
osg::notify(osg::NOTICE)<<"Please specify a model filename on the command line."<<std::endl;
|
|
return 1;
|
|
}
|
|
|
|
// to do scribe mode we create a top most group to contain the
|
|
// original model, and then a second group contains the same model
|
|
// but overrides various state attributes, so that the second instance
|
|
// is rendered as wireframe.
|
|
|
|
osg::ref_ptr<osg::Group> rootnode = new osg::Group;
|
|
|
|
osg::ref_ptr<osg::Group> decorator = new osg::Group;
|
|
|
|
rootnode->addChild(loadedModel);
|
|
|
|
|
|
rootnode->addChild(decorator);
|
|
|
|
decorator->addChild(loadedModel);
|
|
|
|
// set up the state so that the underlying color is not seen through
|
|
// and that the drawing mode is changed to wireframe, and a polygon offset
|
|
// is added to ensure that we see the wireframe itself, and turn off
|
|
// so texturing too.
|
|
osg::ref_ptr<osg::StateSet> stateset = new osg::StateSet;
|
|
osg::ref_ptr<osg::PolygonOffset> polyoffset = new osg::PolygonOffset;
|
|
polyoffset->setFactor(-1.0f);
|
|
polyoffset->setUnits(-1.0f);
|
|
osg::ref_ptr<osg::PolygonMode> polymode = new osg::PolygonMode;
|
|
polymode->setMode(osg::PolygonMode::FRONT_AND_BACK,osg::PolygonMode::LINE);
|
|
stateset->setAttributeAndModes(polyoffset,osg::StateAttribute::OVERRIDE|osg::StateAttribute::ON);
|
|
stateset->setAttributeAndModes(polymode,osg::StateAttribute::OVERRIDE|osg::StateAttribute::ON);
|
|
|
|
#if 1
|
|
osg::ref_ptr<osg::Material> material = new osg::Material;
|
|
stateset->setAttributeAndModes(material,osg::StateAttribute::OVERRIDE|osg::StateAttribute::ON);
|
|
stateset->setMode(GL_LIGHTING,osg::StateAttribute::OVERRIDE|osg::StateAttribute::OFF);
|
|
#else
|
|
// version which sets the color of the wireframe.
|
|
osg::Material* material = new osg::Material;
|
|
material->setColorMode(osg::Material::OFF); // switch glColor usage off
|
|
// turn all lighting off
|
|
material->setAmbient(osg::Material::FRONT_AND_BACK, osg::Vec4(0.0,0.0f,0.0f,1.0f));
|
|
material->setDiffuse(osg::Material::FRONT_AND_BACK, osg::Vec4(0.0,0.0f,0.0f,1.0f));
|
|
material->setSpecular(osg::Material::FRONT_AND_BACK, osg::Vec4(0.0,0.0f,0.0f,1.0f));
|
|
// except emission... in which we set the color we desire
|
|
material->setEmission(osg::Material::FRONT_AND_BACK, osg::Vec4(0.0,1.0f,0.0f,1.0f));
|
|
stateset->setAttributeAndModes(material,osg::StateAttribute::OVERRIDE|osg::StateAttribute::ON);
|
|
stateset->setMode(GL_LIGHTING,osg::StateAttribute::OVERRIDE|osg::StateAttribute::ON);
|
|
#endif
|
|
|
|
stateset->setTextureMode(0,GL_TEXTURE_2D,osg::StateAttribute::OVERRIDE|osg::StateAttribute::OFF);
|
|
|
|
// osg::LineStipple* linestipple = new osg::LineStipple;
|
|
// linestipple->setFactor(1);
|
|
// linestipple->setPattern(0xf0f0);
|
|
// stateset->setAttributeAndModes(linestipple,osg::StateAttribute::OVERRIDE_ON);
|
|
|
|
decorator->setStateSet(stateset);
|
|
|
|
|
|
// run optimization over the scene graph
|
|
osgUtil::Optimizer optimzer;
|
|
optimzer.optimize(rootnode);
|
|
|
|
// add a viewport to the viewer and attach the scene graph.
|
|
viewer.setSceneData( rootnode );
|
|
|
|
return viewer.run();
|
|
}
|