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, PN_stdfloat weight0);
00040   INLINE TransformBlend(const VertexTransform *transform0, PN_stdfloat weight0,
00041                         const VertexTransform *transform1, PN_stdfloat weight1);
00042   INLINE TransformBlend(const VertexTransform *transform0, PN_stdfloat weight0,
00043                         const VertexTransform *transform1, PN_stdfloat weight1,
00044                         const VertexTransform *transform2, PN_stdfloat weight2);
00045   INLINE TransformBlend(const VertexTransform *transform0, PN_stdfloat weight0,
00046                         const VertexTransform *transform1, PN_stdfloat weight1,
00047                         const VertexTransform *transform2, PN_stdfloat weight2,
00048                         const VertexTransform *transform3, PN_stdfloat 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, PN_stdfloat weight);
00059   void remove_transform(const VertexTransform *transform);
00060   void limit_transforms(int max_transforms);
00061   void normalize_weights();
00062   bool has_transform(const VertexTransform *transform) const;
00063   PN_stdfloat get_weight(const VertexTransform *transform) const;
00064 
00065   INLINE int get_num_transforms() const;
00066   INLINE const VertexTransform *get_transform(int n) const;
00067   MAKE_SEQ(get_transforms, get_num_transforms, get_transform);
00068   INLINE PN_stdfloat get_weight(int n) const;
00069   INLINE void set_transform(int n, const VertexTransform *transform);
00070   INLINE void set_weight(int n, PN_stdfloat weight);
00071 
00072   INLINE void update_blend(Thread *current_thread) const;
00073 
00074   INLINE void get_blend(LMatrix4 &result, Thread *current_thread) const;
00075 
00076   INLINE void transform_point(LPoint4f &point, Thread *current_thread) const;
00077   INLINE void transform_point(LPoint3f &point, Thread *current_thread) const;
00078   INLINE void transform_vector(LVector3f &point, Thread *current_thread) const;
00079 
00080   INLINE void transform_point(LPoint4d &point, Thread *current_thread) const;
00081   INLINE void transform_point(LPoint3d &point, Thread *current_thread) const;
00082   INLINE void transform_vector(LVector3d &point, Thread *current_thread) const;
00083 
00084   INLINE UpdateSeq get_modified(Thread *current_thread) const;
00085 
00086   void output(ostream &out) const;
00087   void write(ostream &out, int indent_level) const;
00088 
00089 private:
00090   class CData;
00091 
00092   void recompute_result(CData *cdata, Thread *current_thread);
00093   void clear_result(Thread *current_thread);
00094 
00095   class TransformEntry {
00096   public:
00097     INLINE bool operator < (const TransformEntry &other) const;
00098 
00099     CPT(VertexTransform) _transform;
00100     PN_stdfloat _weight;
00101   };
00102   typedef ov_set<TransformEntry> Entries;
00103   Entries _entries;
00104 
00105   // This is the data that must be cycled between pipeline stages; it
00106   // is just a local cache.
00107   class EXPCL_PANDA_GOBJ CData : public CycleData {
00108   public:
00109     INLINE CData();
00110     INLINE CData(const CData &copy);
00111     virtual CycleData *make_copy() const;
00112     virtual TypeHandle get_parent_type() const {
00113       return TransformBlend::get_class_type();
00114     }
00115 
00116     LMatrix4 _result;
00117     UpdateSeq _modified;
00118     UpdateSeq _global_modified;
00119   };
00120 
00121   PipelineCycler<CData> _cycler;
00122   typedef CycleDataLockedReader<CData> CDLockedReader;
00123   typedef CycleDataReader<CData> CDReader;
00124   typedef CycleDataWriter<CData> CDWriter;
00125 
00126 public:
00127   void write_datagram(BamWriter *manager, Datagram &dg) const;
00128   int complete_pointers(TypedWritable **plist, BamReader *manager);
00129   void fillin(DatagramIterator &scan, BamReader *manager);
00130 
00131   friend class VertexTransform;
00132 
00133 public:
00134   static TypeHandle get_class_type() {
00135     return _type_handle;
00136   }
00137   static void init_type() {
00138     register_type(_type_handle, "TransformBlend");
00139   }
00140 
00141 private:
00142   static TypeHandle _type_handle;
00143 };
00144 
00145 INLINE ostream &operator << (ostream &out, const TransformBlend &obj);
00146 
00147 #include "transformBlend.I"
00148 
00149 #endif
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