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
121 lines
3.9 KiB
C++
121 lines
3.9 KiB
C++
/* OpenSceneGraph example, osgshape.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <osg/Geode>
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#include <osg/ShapeDrawable>
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#include <osg/Material>
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#include <osg/Texture2D>
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#include <osgUtil/ShaderGen>
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#include <osgViewer/Viewer>
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#include <osgDB/ReadFile>
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#include <osgDB/WriteFile>
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#include <osg/Math>
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// for the grid data..
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#include "../osghangglide/terrain_coords.h"
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osg::Geode* createShapes()
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{
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osg::Geode* geode = new osg::Geode();
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// ---------------------------------------
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// Set up a StateSet to texture the objects
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// ---------------------------------------
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osg::StateSet* stateset = new osg::StateSet();
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osg::ref_ptr<osg::Image> image = osgDB::readRefImageFile( "Images/lz.rgb" );
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if (image)
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{
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osg::Texture2D* texture = new osg::Texture2D;
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texture->setImage(image);
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texture->setFilter(osg::Texture::MIN_FILTER, osg::Texture::LINEAR);
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stateset->setTextureAttributeAndModes(0,texture, osg::StateAttribute::ON);
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}
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stateset->setMode(GL_LIGHTING, osg::StateAttribute::ON);
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geode->setStateSet( stateset );
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float radius = 0.8f;
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float height = 1.0f;
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osg::TessellationHints* hints = new osg::TessellationHints;
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hints->setDetailRatio(0.5f);
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geode->addDrawable(new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(0.0f,0.0f,0.0f),radius),hints));
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geode->addDrawable(new osg::ShapeDrawable(new osg::Box(osg::Vec3(2.0f,0.0f,0.0f),2*radius),hints));
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geode->addDrawable(new osg::ShapeDrawable(new osg::Cone(osg::Vec3(4.0f,0.0f,0.0f),radius,height),hints));
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geode->addDrawable(new osg::ShapeDrawable(new osg::Cylinder(osg::Vec3(6.0f,0.0f,0.0f),radius,height),hints));
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geode->addDrawable(new osg::ShapeDrawable(new osg::Capsule(osg::Vec3(8.0f,0.0f,0.0f),radius,height),hints));
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osg::HeightField* grid = new osg::HeightField;
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grid->allocate(38,39);
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grid->setXInterval(0.28f);
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grid->setYInterval(0.28f);
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for(unsigned int r=0;r<39;++r)
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{
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for(unsigned int c=0;c<38;++c)
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{
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grid->setHeight(c,r,vertex[r+c*39][2]);
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}
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}
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geode->addDrawable(new osg::ShapeDrawable(grid));
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osg::ConvexHull* mesh = new osg::ConvexHull;
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osg::Vec3Array* vertices = new osg::Vec3Array(4);
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(*vertices)[0].set(9.0+0.0f,-1.0f+2.0f,-1.0f+0.0f);
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(*vertices)[1].set(9.0+1.0f,-1.0f+0.0f,-1.0f+0.0f);
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(*vertices)[2].set(9.0+2.0f,-1.0f+2.0f,-1.0f+0.0f);
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(*vertices)[3].set(9.0+1.0f,-1.0f+1.0f,-1.0f+2.0f);
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osg::UByteArray* indices = new osg::UByteArray(12);
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(*indices)[0]=0;
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(*indices)[1]=2;
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(*indices)[2]=1;
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(*indices)[3]=0;
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(*indices)[4]=1;
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(*indices)[5]=3;
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(*indices)[6]=1;
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(*indices)[7]=2;
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(*indices)[8]=3;
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(*indices)[9]=2;
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(*indices)[10]=0;
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(*indices)[11]=3;
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mesh->setVertices(vertices);
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mesh->setIndices(indices);
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geode->addDrawable(new osg::ShapeDrawable(mesh));
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return geode;
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}
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int main(int, char **)
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{
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// construct the viewer.
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osgViewer::Viewer viewer;
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// add model to viewer.
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viewer.setSceneData( createShapes() );
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return viewer.run();
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}
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