osgEarth 2.1.1
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00001 /* -*-c++-*- */ 00002 /* osgEarth - Dynamic map generation toolkit for OpenSceneGraph 00003 * Copyright 2008-2009 Pelican Ventures, Inc. 00004 * http://osgearth.org 00005 * 00006 * osgEarth is free software; you can redistribute it and/or modify 00007 * it under the terms of the GNU Lesser General Public License as published by 00008 * the Free Software Foundation; either version 2 of the License, or 00009 * (at your option) any later version. 00010 * 00011 * This program is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 * GNU Lesser General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU Lesser General Public License 00017 * along with this program. If not, see <http://www.gnu.org/licenses/> 00018 */ 00019 #ifndef OSGEARTHFEATURES_STENCIL_VOLUME_NODE_H 00020 #define OSGEARTHFEATURES_STENCIL_VOLUME_NODE_H 1 00021 00022 #include <osgEarthFeatures/Common> 00023 #include <osgEarthFeatures/Filter> 00024 #include <osgEarthFeatures/Geometry> 00025 #include <osgEarth/MaskNode> 00026 #include <osg/Group> 00027 #include <osg/Vec4> 00028 00029 namespace osgEarth { namespace Features 00030 { 00031 class OSGEARTHFEATURES_EXPORT StencilVolumeNode : public osgEarth::MaskNode 00032 { 00033 public: 00047 StencilVolumeNode( 00048 bool preRenderChildrenToDepthBuffer =false, 00049 bool inverted =false ); 00050 00051 StencilVolumeNode( const StencilVolumeNode& rhs, const osg::CopyOp& op =osg::CopyOp::DEEP_COPY_ALL ); 00052 00053 META_Node(osgEarth::Features,StencilVolumeNode); 00054 00055 virtual void traverse( osg::NodeVisitor& nv ); 00056 00057 public: // props 00058 00059 // sets the render bins and returns the next available bin. 00060 int setBaseRenderBin( int bin ); 00061 00062 // adds stenciling volume geometry 00063 void addVolumes( osg::Node* node ); 00064 00065 // adds the node to draw once the stencil is in place. 00066 //void setChild( osg::Node* node ); 00067 00068 public: //osg::Group overrides 00069 00070 virtual bool addChild( Node *child ); 00071 virtual bool insertChild( unsigned int index, Node *child ); 00072 virtual bool removeChildren(unsigned int pos,unsigned int numChildrenToRemove); 00073 virtual bool replaceChild( Node *origChild, Node* newChild ); 00074 virtual bool setChild( unsigned int i, Node* node ); 00075 virtual osg::BoundingSphere computeBound() const; 00076 00077 protected: 00078 void init(); 00079 00080 osg::ref_ptr<osg::Group> _root; 00081 osg::Group* _stencilGroup1; 00082 osg::Group* _stencilGroup2; 00083 osg::Group* _depthPass; 00084 osg::Group* _renderPass; 00085 bool _inverted; 00086 bool _preRenderChildrenToDepthBuffer; 00087 }; 00088 00089 00090 class OSGEARTHFEATURES_EXPORT StencilVolumeFactory 00091 { 00092 public: 00093 static osg::Geode* createVolume( 00094 Geometry* geom, 00095 double offset, 00096 double height, 00097 const FilterContext& context ); 00098 }; 00099 00100 } } // namespace osgEarth::Features 00101 00102 #endif // OSGEARTHFEATURES_STENCIL_VOLUME_NODE_H 00103