Panda3D

cullFaceAttrib.h

00001 // Filename: cullFaceAttrib.h
00002 // Created by:  drose (27Feb02)
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 CULLFACEATTRIB_H
00016 #define CULLFACEATTRIB_H
00017 
00018 #include "pandabase.h"
00019 
00020 #include "renderAttrib.h"
00021 
00022 class FactoryParams;
00023 
00024 ////////////////////////////////////////////////////////////////////
00025 //       Class : CullFaceAttrib
00026 // Description : Indicates which faces should be culled based on their
00027 //               vertex ordering.
00028 ////////////////////////////////////////////////////////////////////
00029 class EXPCL_PANDA_PGRAPH CullFaceAttrib : public RenderAttrib {
00030 PUBLISHED:
00031   enum Mode {
00032     M_cull_none,                // Cull no polygons
00033     M_cull_clockwise,           // Cull clockwise-oriented polygons
00034     M_cull_counter_clockwise,   // Cull counter-clockwise-oriented polygons
00035     M_cull_unchanged,           // Do not change existing cull behavior
00036   };
00037 
00038 private:
00039   INLINE CullFaceAttrib(Mode mode, bool reverse);
00040 
00041 PUBLISHED:
00042   static CPT(RenderAttrib) make(Mode mode = M_cull_clockwise);
00043   static CPT(RenderAttrib) make_reverse();
00044   static CPT(RenderAttrib) make_default();
00045 
00046   INLINE Mode get_actual_mode() const;
00047   INLINE bool get_reverse() const;
00048   Mode get_effective_mode() const;
00049 
00050 public:
00051   virtual void output(ostream &out) const;
00052 
00053 protected:
00054   virtual int compare_to_impl(const RenderAttrib *other) const;
00055   virtual CPT(RenderAttrib) compose_impl(const RenderAttrib *other) const;
00056   virtual CPT(RenderAttrib) invert_compose_impl(const RenderAttrib *other) const;
00057 
00058 private:
00059   Mode _mode;
00060   bool _reverse;
00061 
00062 PUBLISHED:
00063   static int get_class_slot() {
00064     return _attrib_slot;
00065   }
00066   virtual int get_slot() const {
00067     return get_class_slot();
00068   }
00069 
00070 public:
00071   static void register_with_read_factory();
00072   virtual void write_datagram(BamWriter *manager, Datagram &dg);
00073 
00074 protected:
00075   static TypedWritable *make_from_bam(const FactoryParams &params);
00076   void fillin(DatagramIterator &scan, BamReader *manager);
00077   
00078 public:
00079   static TypeHandle get_class_type() {
00080     return _type_handle;
00081   }
00082   static void init_type() {
00083     RenderAttrib::init_type();
00084     register_type(_type_handle, "CullFaceAttrib",
00085                   RenderAttrib::get_class_type());
00086     _attrib_slot = register_slot(_type_handle, 100, make_default);
00087   }
00088   virtual TypeHandle get_type() const {
00089     return get_class_type();
00090   }
00091   virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
00092 
00093 private:
00094   static TypeHandle _type_handle;
00095   static int _attrib_slot;
00096 };
00097 
00098 #include "cullFaceAttrib.I"
00099 
00100 #endif
00101 
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