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Added support for positional lights into computeShadowVolumeGeometry code and cleaned up OccluderGeometry interface.

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This commit is contained in:
Robert Osfield
2006-11-24 11:37:57 +00:00
parent 51744272d5
commit 006435e679
3 changed files with 126 additions and 103 deletions
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79
include/osgShadow/OccluderGeometry
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@@ -44,19 +44,44 @@ class OSGSHADOW_EXPORT OccluderGeometry : public osg::Drawable
virtual const char* libraryName() const { return "osgShadow"; }
virtual const char* className() const { return "OccluderGeometry"; }
/** Compute an occluder geometry containing all the geometry in specified subgraph.*/
void computeOccluderGeometry(osg::Node* subgraph, osg::Matrix* matrix=0, float sampleRatio=1.0f);
/** Compute an occluder geometry containing the geometry in specified drawable.*/
void computeOccluderGeometry(osg::Drawable* drawable, osg::Matrix* matrix=0, float sampleRatio=1.0f);
/** Compute ShadowVolumeGeometry. */
void comptueShadowVolumeGeometry(const osg::Vec4& lightpos, ShadowVolumeGeometry& svg) const;
/** Set the bounding polytope of the OccluderGeometry.*/
void setBoundingPolytope(const osg::Polytope& polytope) { _boundingPolytope = polytope; }
/** Get the bounding polytope of the OccluderGeometry.*/
osg::Polytope& getBoundingPolytope() { return _boundingPolytope; }
/** Get the const bounding polytope of the OccluderGeometry.*/
const osg::Polytope& getBoundingPolytope() const { return _boundingPolytope; }
/** Render the occluder geometry. */
virtual void drawImplementation(osg::RenderInfo& renderInfo) const;
/** Compute the bounding box around occluder geometry.*/
virtual osg::BoundingBox computeBound() const;
typedef std::vector<osg::Vec3> Vec3List;
typedef std::vector<GLuint> UIntList;
struct Point
{
Point() {}
public:
UIntList _edges;
};
void processGeometry(osg::Drawable* drawable, osg::Matrix* matrix=0, float sampleRatio=1.0f);
typedef std::vector<Point> PointList;
protected :
virtual ~OccluderGeometry() {}
struct Edge
{
Edge():
@@ -115,42 +140,6 @@ class OSGSHADOW_EXPORT OccluderGeometry : public osg::Drawable
typedef std::vector<Edge> EdgeList;
/** Compute an occluder geometry containing all the geometry in specified subgraph.*/
void computeOccluderGeometry(osg::Node* subgraph, osg::Matrix* matrix=0, float sampleRatio=1.0f);
/** Compute an occluder geometry containing the geometry in specified drawable.*/
void computeOccluderGeometry(osg::Drawable* drawable, osg::Matrix* matrix=0, float sampleRatio=1.0f);
/** Compute ShadowVolumeGeometry. */
void comptueShadowVolumeGeometry(const osg::Vec4& lightpos, ShadowVolumeGeometry& svg);
/** Set the bounding polytope of the OccluderGeometry.*/
void setBoundingPolytope(const osg::Polytope& polytope) { _boundingPolytope = polytope; }
/** Get the bounding polytope of the OccluderGeometry.*/
osg::Polytope& getBoundingPolytope() { return _boundingPolytope; }
/** Get the const bounding polytope of the OccluderGeometry.*/
const osg::Polytope& getBoundingPolytope() const { return _boundingPolytope; }
/** Render the occluder geometry. */
virtual void drawImplementation(osg::RenderInfo& renderInfo) const;
/** Compute the bounding box around occluder geometry.*/
virtual osg::BoundingBox computeBound() const;
public:
void processGeometry(osg::Drawable* drawable, osg::Matrix* matrix=0, float sampleRatio=1.0f);
protected :
virtual ~OccluderGeometry() {}
inline bool isLightPointSilhouetteEdge(const osg::Vec3& lightpos, const Edge& edge) const
{
if (edge.boundaryEdge()) return true;
@@ -183,8 +172,8 @@ class OSGSHADOW_EXPORT OccluderGeometry : public osg::Drawable
void computeNormals();
void buildEdgeMaps();
void computeLightPointSlihouetteEdges(const osg::Vec3& lightpos);
void computeLightDirectionSlihouetteEdges(const osg::Vec3& lightdirection);
void computeLightDirectionSlihouetteEdges(const osg::Vec3& lightdirection, UIntList& silhouetteIndices) const;
void computeLightPositionSlihouetteEdges(const osg::Vec3& lightpos, UIntList& silhouetteIndices) const;
osg::Polytope _boundingPolytope;
@@ -193,9 +182,7 @@ class OSGSHADOW_EXPORT OccluderGeometry : public osg::Drawable
Vec3List _triangleNormals;
UIntList _triangleIndices;
PointList _points;
EdgeList _edges;
UIntList _silhouetteIndices;
};
class OSGSHADOW_EXPORT ShadowVolumeGeometry : public osg::Drawable