5cd4faf05b
The attached changes are against OpenSceneGraph 2.8.2.
//Sample program. Run against an osgEarth or VPB database based on osgTerrain.
#include <osgDB/ReadFile>
#include <osgViewer/Viewer>
int main(int argc, char** argv)
{
osg::ArgumentParser arguments(&argc,argv);
osgViewer::Viewer* viewer = new osgViewer::Viewer();
viewer->setUpViewInWindow(100,
100,500,500);
osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
viewer->setSceneData( loadedModel.get() );
viewer->run();
delete viewer;
viewer = new osgViewer::Viewer();
viewer->setUpViewInWindow(100,100,500,500);
loadedModel = osgDB::readNodeFiles(arguments);
viewer->setSceneData( loadedModel.get() );
viewer->run();
delete viewer;
}"
253 lines
9.3 KiB
C++
253 lines
9.3 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSGTERRAIN_TERRAINTILE
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#define OSGTERRAIN_TERRAINTILE 1
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#include <osg/Group>
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#include <osg/CoordinateSystemNode>
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#include <osgDB/ReaderWriter>
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#include <osgTerrain/TerrainTechnique>
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#include <osgTerrain/Layer>
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#include <osgTerrain/Locator>
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namespace osgTerrain {
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class Terrain;
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class OSGTERRAIN_EXPORT TileID
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{
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public:
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TileID();
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TileID(int in_level, int in_x, int in_y);
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bool operator == (const TileID& rhs) const
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{
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return (level==rhs.level) && (x==rhs.x) && (y==rhs.y);
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}
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bool operator != (const TileID& rhs) const
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{
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return (level!=rhs.level) || (x!=rhs.x) || (y!=rhs.y);
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}
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bool operator < (const TileID& rhs) const
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{
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if (level<rhs.level) return true;
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if (level>rhs.level) return false;
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if (x<rhs.x) return true;
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if (x>rhs.x) return false;
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return y<rhs.y;
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}
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bool valid() const { return level>=0; }
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int level;
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int x;
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int y;
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};
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/** Terrain provides a framework for loosely coupling height field data with height rendering algorithms.
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* This allows TerrainTechnique's to be plugged in at runtime.*/
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class OSGTERRAIN_EXPORT TerrainTile : public osg::Group
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{
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public:
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TerrainTile();
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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TerrainTile(const TerrainTile&,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
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META_Node(osgTerrain, TerrainTile);
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virtual void traverse(osg::NodeVisitor& nv);
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/** Call init on any attached TerrainTechnique.*/
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void init();
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/** Set the Terrain that this Terrain tile is a member of.*/
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void setTerrain(Terrain* ts);
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/** Get the Terrain that this Terrain tile is a member of.*/
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Terrain* getTerrain() { return _terrain; }
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/** Get the const Terrain that this Terrain tile is a member of.*/
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const Terrain* getTerrain() const { return _terrain; }
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/** Set the TileID (layer, x,y) of the TerrainTile.
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* The TileID is used so it can be located by its neighbours
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* via the enclosing Terrain node that manages a map of TileID to TerraiTiles.*/
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void setTileID(const TileID& tileID);
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/** Get the TileID (layer, x,y) of the TerrainTile.*/
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const TileID& getTileID() const { return _tileID; }
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/** Set the TerrainTechnique*/
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void setTerrainTechnique(TerrainTechnique* terrainTechnique);
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/** Get the TerrainTechnique*/
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TerrainTechnique* getTerrainTechnique() { return _terrainTechnique.get(); }
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/** Get the const TerrainTechnique*/
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const TerrainTechnique* getTerrainTechnique() const { return _terrainTechnique.get(); }
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/** Set the coordinate frame locator of the terrain node.
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* The locator takes non-dimensional s,t coordinates into the X,Y,Z world coords and back.*/
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void setLocator(Locator* locator) { _locator = locator; }
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/** Get the coordinate frame locator of the terrain node.*/
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Locator* getLocator() { return _locator.get(); }
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/** Get the const coordinate frame locator of the terrain node.*/
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const Locator* getLocator() const { return _locator.get(); }
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/** Set the layer to use to define the elevations of the terrain.*/
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void setElevationLayer(Layer* layer);
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/** Get the layer to use to define the elevations of the terrain.*/
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Layer* getElevationLayer() { return _elevationLayer.get(); }
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/** Get the const layer to use to define the elevations of the terrain.*/
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const Layer* getElevationLayer() const { return _elevationLayer.get(); }
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/** Set a color layer with specified layer number.*/
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void setColorLayer(unsigned int i, Layer* layer);
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/** Get color layer with specified layer number.*/
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Layer* getColorLayer(unsigned int i) { return i<_colorLayers.size() ? _colorLayers[i].get() : 0; }
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/** Set const color layer with specified layer number.*/
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const Layer* getColorLayer(unsigned int i) const { return i<_colorLayers.size() ? _colorLayers[i].get() : 0; }
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/** Get the number of colour layers.*/
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unsigned int getNumColorLayers() const { return _colorLayers.size(); }
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/** Set hint to whether the TerrainTechnique should create per vertex normals for lighting purposes.*/
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void setRequiresNormals(bool flag) { _requiresNormals = flag; }
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/** Get whether the TerrainTechnique should create per vertex normals for lighting purposes.*/
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bool getRequiresNormals() const { return _requiresNormals; }
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/** Set the hint to whether the TerrainTechnique should treat the invalid Layer entries that at are neigbours to valid entries with the default value.*/
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void setTreatBoundariesToValidDataAsDefaultValue(bool flag) { _treatBoundariesToValidDataAsDefaultValue = flag; }
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/** Get whether the TeatBoundariesToValidDataAsDefaultValue hint.*/
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bool getTreatBoundariesToValidDataAsDefaultValue() const { return _treatBoundariesToValidDataAsDefaultValue; }
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/** Set the dirty flag on/off.*/
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void setDirty(bool dirty);
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/** return true if the tile is dirty and needs to be updated,*/
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bool getDirty() const { return _dirty; }
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/** Compute the bounding volume of the terrain by computing the union of the bounding volumes of all layers.*/
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virtual osg::BoundingSphere computeBound() const;
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/** Callback for post processing loaded TerrainTile, and for filling in missing elements such as external external imagery.*/
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struct TileLoadedCallback : public osg::Referenced
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{
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virtual bool deferExternalLayerLoading() const = 0;
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virtual void loaded(osgTerrain::TerrainTile* tile, const osgDB::ReaderWriter::Options* options) const = 0;
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};
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static void setTileLoadedCallback(TileLoadedCallback* lc);
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static osg::ref_ptr<TileLoadedCallback>& getTileLoadedCallback();
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/** If State is non-zero, this function releases any associated OpenGL objects for
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* the specified graphics context. Otherwise, releases OpenGL objects
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* for all graphics contexts. */
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virtual void releaseGLObjects(osg::State* = 0) const;
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protected:
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virtual ~TerrainTile();
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typedef std::vector< osg::ref_ptr<Layer> > Layers;
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friend class Terrain;
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Terrain* _terrain;
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bool _dirty;
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bool _hasBeenTraversal;
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TileID _tileID;
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osg::ref_ptr<TerrainTechnique> _terrainTechnique;
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osg::ref_ptr<Locator> _locator;
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osg::ref_ptr<Layer> _elevationLayer;
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Layers _colorLayers;
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bool _requiresNormals;
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bool _treatBoundariesToValidDataAsDefaultValue;
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};
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/** Helper callback for managing optional sets of layers, that loading of is deffered to this callback,
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* with this callback working out which layers to load, and how to create fallback versions of the layers.
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*/
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class OSGTERRAIN_EXPORT WhiteListTileLoadedCallback : public TerrainTile::TileLoadedCallback
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{
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public:
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WhiteListTileLoadedCallback();
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void allow(const std::string& setname) { _setWhiteList.insert(setname); }
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void setMinimumNumOfLayers(unsigned int numLayers) { _minumumNumberOfLayers = numLayers; }
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unsigned int getMinimumNumOfLayers() const { return _minumumNumberOfLayers; }
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void setReplaceSwitchLayer(bool replaceSwitchLayer) { _replaceSwitchLayer = replaceSwitchLayer; }
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bool getReplaceSwitchLayer() const { return _replaceSwitchLayer; }
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void setAllowAll(bool allowAll) { _allowAll = allowAll; }
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bool getAllowAll() const { return _allowAll; }
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bool layerAcceptable(const std::string& setname) const;
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bool readImageLayer(osgTerrain::ImageLayer* imageLayer, const osgDB::ReaderWriter::Options* options) const;
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virtual bool deferExternalLayerLoading() const;
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virtual void loaded(osgTerrain::TerrainTile* tile, const osgDB::ReaderWriter::Options* options) const;
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protected:
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virtual ~WhiteListTileLoadedCallback();
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typedef std::set<std::string> SetWhiteList;
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SetWhiteList _setWhiteList;
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unsigned int _minumumNumberOfLayers;
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bool _replaceSwitchLayer;
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bool _allowAll;
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};
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}
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#endif
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