示例#1
0
        void apply(osg::Geometry& geom)
        {
            geom.setUseDisplayList(false);

            if (!_manualVertexAliasing) return;

            osg::notify(osg::NOTICE)<<"Found geometry "<<&geom<<std::endl;
            if (geom.getVertexArray())
            {
                setVertexAttrib(geom, _vertexAlias, geom.getVertexArray(), false, osg::Array::BIND_PER_VERTEX);
                geom.setVertexArray(0);
            }

            if (geom.getNormalArray())
            {
                setVertexAttrib(geom, _normalAlias, geom.getNormalArray(), true);
                geom.setNormalArray(0);
            }

            if (geom.getColorArray())
            {
                setVertexAttrib(geom, _colorAlias, geom.getColorArray(), false);
                geom.setColorArray(0);
            }

            if (geom.getSecondaryColorArray())
            {
                setVertexAttrib(geom, _secondaryColorAlias, geom.getSecondaryColorArray(), false);
                geom.setSecondaryColorArray(0);
            }

            if (geom.getFogCoordArray())
            {
                // should we normalize the FogCoord array? Don't think so...
                setVertexAttrib(geom, _fogCoordAlias, geom.getFogCoordArray(), false);
                geom.setFogCoordArray(0);
            }

            unsigned int maxNumTexCoords = geom.getNumTexCoordArrays();
            if (maxNumTexCoords>8)
            {
                osg::notify(osg::NOTICE)<<"Warning: Ignoring "<<maxNumTexCoords-8<<" texture coordinate arrays, only 8 are currently supported in vertex attribute conversion code."<<std::endl;
                maxNumTexCoords = 8;
            }
            for(unsigned int i=0; i<maxNumTexCoords; ++i)
            {
                if (geom.getTexCoordArray(i))
                {
                    setVertexAttrib(geom, _texCoordAlias[i], geom.getTexCoordArray(i), false, osg::Array::BIND_PER_VERTEX);
                    geom.setTexCoordArray(i,0);
                }
                else
                {
                    osg::notify(osg::NOTICE)<<"Found empty TexCoordArray("<<i<<")"<<std::endl;
                }
            }
        }
示例#2
0
    void ShaderVisitor::apply(osg::Geometry& geometry)
    {
        bool needPop = (geometry.getStateSet() != NULL);
        if (geometry.getStateSet())
        {
            pushRequirements();
            applyStateSet(geometry.getStateSet(), geometry);
        }

        if (!mRequirements.empty())
        {
            const ShaderRequirements& reqs = mRequirements.back();

            if (mAllowedToModifyStateSets)
            {
                // make sure that all UV sets are there
                for (std::map<int, std::string>::const_iterator it = reqs.mTextures.begin(); it != reqs.mTextures.end(); ++it)
                {
                    if (geometry.getTexCoordArray(it->first) == NULL)
                        geometry.setTexCoordArray(it->first, geometry.getTexCoordArray(0));
                }
            }

            if (reqs.mTexStageRequiringTangents != -1 && mAllowedToModifyStateSets)
            {
                osg::ref_ptr<osgUtil::TangentSpaceGenerator> generator (new osgUtil::TangentSpaceGenerator);
                generator->generate(&geometry, reqs.mTexStageRequiringTangents);

                geometry.setTexCoordArray(7, generator->getTangentArray(), osg::Array::BIND_PER_VERTEX);
            }

            // TODO: find a better place for the stateset
            if (reqs.mShaderRequired || mForceShaders)
                createProgram(reqs, geometry);
        }

        if (needPop)
            popRequirements();
    }
示例#3
0
void createDAIGeometry( osg::Geometry& geom, int nInstances=1 )
{
    const float halfDimX( .5 );
    const float halfDimZ( .5 );

    osg::Vec3Array* v = new osg::Vec3Array;
    v->resize( 4 );
    geom.setVertexArray( v );

    // Geometry for a single quad.
    (*v)[ 0 ] = osg::Vec3( -halfDimX, 0., 0. );
    (*v)[ 1 ] = osg::Vec3( halfDimX, 0., 0. );
    (*v)[ 2 ] = osg::Vec3( halfDimX, 0., halfDimZ*2.0f );
    (*v)[ 3 ] = osg::Vec3( -halfDimX, 0., halfDimZ*2.0f );


	// create color array data (each corner of our triangle will have one color component)
    osg::Vec4Array* pColors = new osg::Vec4Array;
    pColors->push_back( osg::Vec4( 1.0f, 0.0f, 0.0f, 1.0f ) );
    pColors->push_back( osg::Vec4( 0.0f, 1.0f, 0.0f, 1.0f ) );
    pColors->push_back( osg::Vec4( 0.0f, 0.0f, 1.0f, 1.0f ) );
	pColors->push_back( osg::Vec4( 0.0f, 0.0f, 1.0f, 1.0f ) );
    geom.setColorArray( pColors );

	// make sure that our geometry is using one color per vertex
    geom.setColorBinding( osg::Geometry::BIND_PER_VERTEX );

    osg::Vec2Array* pTexCoords = new osg::Vec2Array( 4 );
    (*pTexCoords)[0].set( 0.0f, 0.0f );
    (*pTexCoords)[1].set( 1.0f, 0.0f );
    (*pTexCoords)[2].set( 1.0f, 1.0f );
    (*pTexCoords)[3].set( 0.0f, 1.0f );
    geom.setTexCoordArray( 0, pTexCoords );

    // Use the DrawArraysInstanced PrimitiveSet and tell it to draw 1024 instances.
    geom.addPrimitiveSet( new osg::DrawArrays( GL_QUADS, 0, 4, nInstances ) );
}