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
96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
/* OpenSceneGraph example, osghangglide.
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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 <math.h>
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#include <osg/Geode>
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#include <osg/Geometry>
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#include <osg/Texture2D>
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#include <osg/TexEnv>
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#include <osg/Depth>
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#include <osg/StateSet>
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#include <osgDB/ReadFile>
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using namespace osg;
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Node *makeBase( void )
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{
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int i, c;
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float theta;
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float ir = 20.0f;
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Vec3Array *coords = new Vec3Array(19);
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Vec2Array *tcoords = new Vec2Array(19);
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Vec4Array *colors = new Vec4Array(1);
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(*colors)[0].set(1.0f,1.0f,1.0f,1.0f);
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c = 0;
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(*coords)[c].set(0.0f,0.0f,0.0f);
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(*tcoords)[c].set(0.0f,0.0f);
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for( i = 0; i <= 18; i++ )
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{
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theta = osg::DegreesToRadians((float)i * 20.0);
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(*coords)[c].set(ir * cosf( theta ), ir * sinf( theta ), 0.0f);
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(*tcoords)[c].set((*coords)[c][0]/36.0f,(*coords)[c][1]/36.0f);
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c++;
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}
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Geometry *geom = new Geometry;
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geom->setVertexArray( coords );
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geom->setTexCoordArray( 0, tcoords );
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geom->setColorArray( colors, Array::BIND_OVERALL );
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geom->addPrimitiveSet( new DrawArrays(PrimitiveSet::TRIANGLE_FAN,0,19) );
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Texture2D *tex = new Texture2D;
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tex->setImage(osgDB::readRefImageFile("Images/water.rgb"));
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tex->setWrap( Texture2D::WRAP_S, Texture2D::REPEAT );
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tex->setWrap( Texture2D::WRAP_T, Texture2D::REPEAT );
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StateSet *dstate = new StateSet;
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dstate->setMode( GL_LIGHTING, StateAttribute::OFF );
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dstate->setTextureAttributeAndModes(0, tex, StateAttribute::ON );
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dstate->setTextureAttribute(0, new TexEnv );
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// clear the depth to the far plane.
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osg::Depth* depth = new osg::Depth;
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depth->setFunction(osg::Depth::ALWAYS);
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depth->setRange(1.0,1.0);
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dstate->setAttributeAndModes(depth,StateAttribute::ON );
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dstate->setRenderBinDetails(-1,"RenderBin");
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geom->setStateSet( dstate );
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Geode *geode = new Geode;
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geode->addDrawable( geom );
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return geode;
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}
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