Panda3D
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occluderNode.h
00001 // Filename: occluderNode.h
00002 // Created by:  jenes (11Mar11)
00003 //
00004 ////////////////////////////////////////////////////////////////////
00005 //
00006 // PANDA 3D SOFTWARE
00007 // Copyright (c) Carnegie Mellon University.  All rights reserved.
00008 //
00009 // All use of this software is subject to the terms of the revised BSD
00010 // license.  You should have received a copy of this license along
00011 // with this source code in a file named "LICENSE."
00012 //
00013 ////////////////////////////////////////////////////////////////////
00014 
00015 #ifndef OCCLUDERNODE_H
00016 #define OCCLUDERNODE_H
00017 
00018 #include "pandabase.h"
00019 
00020 #include "pandaNode.h"
00021 #include "nodePath.h"
00022 #include "pvector.h"
00023 #include "geom.h"
00024 #include "texture.h"
00025 
00026 ////////////////////////////////////////////////////////////////////
00027 //       Class : OccluderNode 
00028 // Description : A node in the scene graph that can hold an 
00029 //               occluder polygon, which must be a rectangle.  When
00030 //               the occluder is activated with something like
00031 //               render.set_occluder(), then objects whose bouding
00032 //               volume lies entirely behind the occluder will not be
00033 //               rendered.
00034 ////////////////////////////////////////////////////////////////////
00035 class EXPCL_PANDA_PGRAPH OccluderNode : public PandaNode {
00036 PUBLISHED:
00037   OccluderNode(const string &name);
00038 
00039 protected:
00040   OccluderNode(const OccluderNode &copy);
00041 
00042 public:
00043   virtual ~OccluderNode();
00044   virtual PandaNode *make_copy() const;
00045   virtual bool preserve_name() const;
00046   virtual void xform(const LMatrix4 &mat);
00047 
00048   virtual bool cull_callback(CullTraverser *trav, CullTraverserData &data);
00049   virtual bool is_renderable() const;
00050 
00051   virtual void output(ostream &out) const;
00052 
00053 PUBLISHED:
00054   INLINE void set_double_sided(bool value);
00055   INLINE bool is_double_sided();
00056   INLINE void set_min_coverage(PN_stdfloat value);
00057   INLINE PN_stdfloat get_min_coverage();
00058   INLINE void set_vertices(const LPoint3 &v0, const LPoint3 &v1,
00059                            const LPoint3 &v2, const LPoint3 &v3);
00060   INLINE int get_num_vertices() const;
00061   INLINE const LPoint3 &get_vertex(int n) const;
00062   MAKE_SEQ(get_vertices, get_num_vertices, get_vertex);
00063 
00064 protected:
00065   virtual void compute_internal_bounds(CPT(BoundingVolume) &internal_bounds,
00066                                        int &internal_vertices,
00067                                        int pipeline_stage,
00068                                        Thread *current_thread) const;
00069   PT(Geom) get_occluder_viz(CullTraverser *trav, CullTraverserData &data);
00070   CPT(RenderState) get_occluder_viz_state(CullTraverser *trav, CullTraverserData &data);
00071   CPT(RenderState) get_frame_viz_state(CullTraverser *trav, CullTraverserData &data);
00072 
00073 private:
00074   bool _double_sided;
00075   PN_stdfloat _min_coverage;
00076   typedef pvector<LPoint3> Vertices;
00077   Vertices _vertices;
00078 
00079   PT(Geom) _occluder_viz, _frame_viz;
00080   static PT(Texture) _viz_tex;
00081 
00082 public:
00083   static void register_with_read_factory();
00084   virtual void write_datagram(BamWriter *manager, Datagram &dg);
00085   virtual int complete_pointers(TypedWritable **plist, BamReader *manager);
00086 
00087 protected:
00088   static TypedWritable *make_from_bam(const FactoryParams &params);
00089   void fillin(DatagramIterator &scan, BamReader *manager);
00090 
00091 public:
00092   static TypeHandle get_class_type() {
00093     return _type_handle;
00094   }
00095   static void init_type() {
00096     PandaNode::init_type();
00097     register_type(_type_handle, "OccluderNode",
00098                   PandaNode::get_class_type());
00099   }
00100   virtual TypeHandle get_type() const {
00101     return get_class_type();
00102   }
00103   virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
00104 
00105 private:
00106   static TypeHandle _type_handle;
00107 };
00108 
00109 #include "occluderNode.I"
00110 
00111 #endif
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