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Added osgTerrain::TerrainTile::set/getBlendingPolicy(BlendingPolicy) to enable control over whether the tile should have blending enabled on it.

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Robert Osfield
2010-03-16 12:05:41 +00:00
parent d10ce23e62
commit 1537af6235
3 changed files with 69 additions and 39 deletions
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27
include/osgTerrain/TerrainTile
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@@ -156,6 +156,21 @@ class OSGTERRAIN_EXPORT TerrainTile : public osg::Group
/** Get whether the TeatBoundariesToValidDataAsDefaultValue hint.*/
bool getTreatBoundariesToValidDataAsDefaultValue() const { return _treatBoundariesToValidDataAsDefaultValue; }
enum BlendingPolicy
{
DO_NOT_SET_BLENDING,
ENABLE_BLENDING,
ENABLE_BLENDING_WHEN_ALPHA_PRESENT /** Default - check colour layers for alpha value and if present enable blending. */
};
/** Set the policy to use when deciding whether to enable/disable blending and use of transparent bin.*/
void setBlendingPolicy(BlendingPolicy policy) { _blendingPolicy = policy; }
/** Get the policy to use when deciding whether to enable/disable blending and use of transparent bin.*/
BlendingPolicy getBlendingPolicy() const { return _blendingPolicy; }
/** Set the dirty flag on/off.*/
void setDirty(bool dirty);
@@ -171,7 +186,7 @@ class OSGTERRAIN_EXPORT TerrainTile : public osg::Group
virtual bool deferExternalLayerLoading() const = 0;
virtual void loaded(osgTerrain::TerrainTile* tile, const osgDB::ReaderWriter::Options* options) const = 0;
};
static void setTileLoadedCallback(TileLoadedCallback* lc);
static osg::ref_ptr<TileLoadedCallback>& getTileLoadedCallback();
@@ -185,27 +200,27 @@ class OSGTERRAIN_EXPORT TerrainTile : public osg::Group
virtual ~TerrainTile();
typedef std::vector< osg::ref_ptr<Layer> > Layers;
friend class Terrain;
Terrain* _terrain;
bool _dirty;
bool _hasBeenTraversal;
TileID _tileID;
osg::ref_ptr<TerrainTechnique> _terrainTechnique;
osg::ref_ptr<Locator> _locator;
osg::ref_ptr<Layer> _elevationLayer;
Layers _colorLayers;
bool _requiresNormals;
bool _treatBoundariesToValidDataAsDefaultValue;
BlendingPolicy _blendingPolicy;
};
/** Helper callback for managing optional sets of layers, that loading of is deffered to this callback,