159 lines
5.9 KiB
C++
159 lines
5.9 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
|
|
*
|
|
* This library is open source and may be redistributed and/or modified under
|
|
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
|
|
* (at your option) any later version. The full license is in LICENSE file
|
|
* included with this distribution, and on the openscenegraph.org website.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* OpenSceneGraph Public License for more details.
|
|
*/
|
|
|
|
#ifndef OSGTERRAIN_TERRAINNODE
|
|
#define OSGTERRAIN_TERRAINNODE 1
|
|
|
|
#include <osg/Group>
|
|
#include <osg/CoordinateSystemNode>
|
|
#include <osg/TransferFunction>
|
|
|
|
#include <osgTerrain/TerrainTechnique>
|
|
#include <osgTerrain/Layer>
|
|
#include <osgTerrain/Locator>
|
|
|
|
namespace osgTerrain {
|
|
|
|
/** Terrain provides a framework for loosly coupling height field data with height rendering algorithms.
|
|
* This allows TerrainTechnique's to be pluged in at runtime.*/
|
|
class OSGTERRAIN_EXPORT TerrainNode : public osg::Group
|
|
{
|
|
public:
|
|
|
|
TerrainNode();
|
|
|
|
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
|
|
TerrainNode(const TerrainNode&,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
|
|
|
|
META_Node(osgTerrain, TerrainNode);
|
|
|
|
virtual void traverse(osg::NodeVisitor& nv);
|
|
|
|
|
|
/** Set the TerrainTechnique*/
|
|
void setTerrainTechnique(osgTerrain::TerrainTechnique* TerrainTechnique);
|
|
|
|
/** Get the TerrainTechnique*/
|
|
TerrainTechnique* getTerrainTechnique() { return _terrainTechnique.get(); }
|
|
|
|
/** Get the const TerrainTechnique*/
|
|
const TerrainTechnique* getTerrainTechnique() const { return _terrainTechnique.get(); }
|
|
|
|
|
|
/** Set the coordinate frame locator of the terrain node.
|
|
* The locator takes non-dimensional s,t coordinates into the X,Y,Z world coords and back.*/
|
|
void setLocator(Locator* locator) { _locator = locator; }
|
|
|
|
/** Get the coordinate frame locator of the terrain node.*/
|
|
Locator* getLocator() { return _locator.get(); }
|
|
|
|
/** Get the coordinate frame locator of the terrain node.*/
|
|
const Locator* getLocator() const { return _locator.get(); }
|
|
|
|
/** Set the layer to use to define the elevations of the terrain.*/
|
|
void setElevationLayer(Layer* layer);
|
|
|
|
/** Get the layer to use to define the elevations of the terrain.*/
|
|
Layer* getElevationLayer() { return _elevationLayer.get(); }
|
|
|
|
/** Get the const layer to use to define the elevations of the terrain.*/
|
|
const Layer* getElevationLayer() const { return _elevationLayer.get(); }
|
|
|
|
|
|
/** Set a color layer with specified layer number.*/
|
|
void setColorLayer(unsigned int i, osgTerrain::Layer* layer);
|
|
|
|
/** Get color layer with specified layer number.*/
|
|
Layer* getColorLayer(unsigned int i) { return i<_colorLayers.size() ? _colorLayers[i].layer.get() : 0; }
|
|
|
|
/** Set const color layer with specified layer number.*/
|
|
const Layer* getColorLayer(unsigned int i) const { return i<_colorLayers.size() ? _colorLayers[i].layer.get() : 0; }
|
|
|
|
/** Set a color transfer function with specified layer number.*/
|
|
void setColorTransferFunction(unsigned int i, osg::TransferFunction* tf);
|
|
|
|
/** Get color transfer function with specified layer number.*/
|
|
osg::TransferFunction* getColorTransferFunction(unsigned int i) { return i<_colorLayers.size() ? _colorLayers[i].transferFunction.get() : 0; }
|
|
|
|
/** Get const color transfer function with specified layer number.*/
|
|
const osg::TransferFunction* getColorTransferFunction(unsigned int i) const { return i<_colorLayers.size() ? _colorLayers[i].transferFunction.get() : 0; }
|
|
|
|
enum Filter
|
|
{
|
|
NEAREST,
|
|
LINEAR
|
|
};
|
|
|
|
/** Set a color filter with specified layer number.*/
|
|
void setColorFilter(unsigned int i, Filter filter);
|
|
|
|
/** Set const color filter with specified layer number.*/
|
|
Filter getColorFilter(unsigned int i) const { return i<_colorLayers.size() ? _colorLayers[i].filter : LINEAR; }
|
|
|
|
|
|
/** Get the number of colour layers.*/
|
|
unsigned int getNumColorLayers() const { return _colorLayers.size(); }
|
|
|
|
|
|
/** Set whether the TerrainTechnique should create per vertex normals for lighting purposes.*/
|
|
void setRequiresNormals(bool flag) { _requiresNormals = flag; }
|
|
|
|
/** Get whether the TerrainTechnique should create per vertex normals for lighting purposes.*/
|
|
bool getRequiresNormals() const { return _requiresNormals; }
|
|
|
|
|
|
/** Compute the bounding volume of the terrain by computing the union of the bounding volumes of all layers.*/
|
|
virtual osg::BoundingSphere computeBound() const;
|
|
|
|
protected:
|
|
|
|
virtual ~TerrainNode();
|
|
|
|
struct LayerData
|
|
{
|
|
LayerData():
|
|
filter(LINEAR) {}
|
|
|
|
LayerData(const LayerData& rhs):
|
|
filter(rhs.filter),
|
|
layer(rhs.layer),
|
|
transferFunction(rhs.transferFunction) {}
|
|
|
|
LayerData& operator = (const LayerData& rhs)
|
|
{
|
|
filter = rhs.filter;
|
|
layer = rhs.layer;
|
|
transferFunction = rhs.transferFunction;
|
|
}
|
|
|
|
Filter filter;
|
|
osg::ref_ptr<Layer> layer;
|
|
osg::ref_ptr<osg::TransferFunction> transferFunction;
|
|
};
|
|
|
|
typedef std::vector<LayerData> Layers;
|
|
|
|
osg::ref_ptr<TerrainTechnique> _terrainTechnique;
|
|
osg::ref_ptr<Locator> _locator;
|
|
|
|
osg::ref_ptr<Layer> _elevationLayer;
|
|
|
|
Layers _colorLayers;
|
|
|
|
bool _requiresNormals;
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|