Panda3D

transformBlend.h

00001 // Filename: transformBlend.h
00002 // Created by:  drose (24Mar05)
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 TRANSFORMBLEND_H
00016 #define TRANSFORMBLEND_H
00017 
00018 #include "pandabase.h"
00019 #include "vertexTransform.h"
00020 #include "pointerTo.h"
00021 #include "pvector.h"
00022 #include "ordered_vector.h"
00023 #include "cycleData.h"
00024 #include "cycleDataLockedReader.h"
00025 #include "cycleDataReader.h"
00026 #include "cycleDataWriter.h"
00027 #include "pipelineCycler.h"
00028 
00029 ////////////////////////////////////////////////////////////////////
00030 //       Class : TransformBlend
00031 // Description : This defines a single entry in a
00032 //               TransformBlendTable.  It represents a unique
00033 //               combination of VertexTransform pointers and blend
00034 //               amounts.
00035 ////////////////////////////////////////////////////////////////////
00036 class EXPCL_PANDA_GOBJ TransformBlend {
00037 PUBLISHED:
00038   INLINE TransformBlend();
00039   INLINE TransformBlend(const VertexTransform *transform0, float weight0);
00040   INLINE TransformBlend(const VertexTransform *transform0, float weight0,
00041                         const VertexTransform *transform1, float weight1);
00042   INLINE TransformBlend(const VertexTransform *transform0, float weight0,
00043                         const VertexTransform *transform1, float weight1,
00044                         const VertexTransform *transform2, float weight2);
00045   INLINE TransformBlend(const VertexTransform *transform0, float weight0,
00046                         const VertexTransform *transform1, float weight1,
00047                         const VertexTransform *transform2, float weight2,
00048                         const VertexTransform *transform3, float weight3);
00049   INLINE TransformBlend(const TransformBlend &copy);
00050   INLINE void operator = (const TransformBlend &copy);
00051   INLINE ~TransformBlend();
00052 
00053   int compare_to(const TransformBlend &other) const;
00054   INLINE bool operator < (const TransformBlend &other) const;
00055   INLINE bool operator == (const TransformBlend &other) const;
00056   INLINE bool operator != (const TransformBlend &other) const;
00057 
00058   void add_transform(const VertexTransform *transform, float weight);
00059   void remove_transform(const VertexTransform *transform);
00060   void normalize_weights();
00061   bool has_transform(const VertexTransform *transform) const;
00062   float get_weight(const VertexTransform *transform) const;
00063 
00064   INLINE int get_num_transforms() const;
00065   INLINE const VertexTransform *get_transform(int n) const;
00066   MAKE_SEQ(get_transforms, get_num_transforms, get_transform);
00067   INLINE float get_weight(int n) const;
00068   INLINE void set_transform(int n, const VertexTransform *transform);
00069   INLINE void set_weight(int n, float weight);
00070 
00071   INLINE void update_blend(Thread *current_thread) const;
00072 
00073   INLINE void get_blend(LMatrix4f &result, Thread *current_thread) const;
00074   INLINE void transform_point(LPoint4f &point, Thread *current_thread) const;
00075   INLINE void transform_point(LPoint3f &point, Thread *current_thread) const;
00076   INLINE void transform_vector(LVector3f &point, Thread *current_thread) const;
00077   INLINE UpdateSeq get_modified(Thread *current_thread) const;
00078 
00079   void output(ostream &out) const;
00080   void write(ostream &out, int indent_level) const;
00081 
00082 private:
00083   class CData;
00084 
00085   void recompute_result(CData *cdata, Thread *current_thread);
00086   void clear_result(Thread *current_thread);
00087 
00088   class TransformEntry {
00089   public:
00090     INLINE bool operator < (const TransformEntry &other) const;
00091 
00092     CPT(VertexTransform) _transform;
00093     float _weight;
00094   };
00095   typedef ov_set<TransformEntry> Entries;
00096   Entries _entries;
00097 
00098   // This is the data that must be cycled between pipeline stages; it
00099   // is just a local cache.
00100   class EXPCL_PANDA_GOBJ CData : public CycleData {
00101   public:
00102     INLINE CData();
00103     INLINE CData(const CData &copy);
00104     virtual CycleData *make_copy() const;
00105     virtual TypeHandle get_parent_type() const {
00106       return TransformBlend::get_class_type();
00107     }
00108 
00109     LMatrix4f _result;
00110     UpdateSeq _modified;
00111     UpdateSeq _global_modified;
00112   };
00113 
00114   PipelineCycler<CData> _cycler;
00115   typedef CycleDataLockedReader<CData> CDLockedReader;
00116   typedef CycleDataReader<CData> CDReader;
00117   typedef CycleDataWriter<CData> CDWriter;
00118 
00119 public:
00120   void write_datagram(BamWriter *manager, Datagram &dg) const;
00121   int complete_pointers(TypedWritable **plist, BamReader *manager);
00122   void fillin(DatagramIterator &scan, BamReader *manager);
00123 
00124   friend class VertexTransform;
00125 
00126 public:
00127   static TypeHandle get_class_type() {
00128     return _type_handle;
00129   }
00130   static void init_type() {
00131     register_type(_type_handle, "TransformBlend");
00132   }
00133 
00134 private:
00135   static TypeHandle _type_handle;
00136 };
00137 
00138 INLINE ostream &operator << (ostream &out, const TransformBlend &obj);
00139 
00140 #include "transformBlend.I"
00141 
00142 #endif
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