Panda3D
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00001 // Filename: texGenAttrib.h 00002 // Created by: masad (21Jun04) 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 TEXGENATTRIB_H 00016 #define TEXGENATTRIB_H 00017 00018 #include "pandabase.h" 00019 00020 #include "geom.h" 00021 #include "renderAttrib.h" 00022 #include "textureStage.h" 00023 #include "texture.h" 00024 #include "pointerTo.h" 00025 #include "nodePath.h" 00026 00027 //////////////////////////////////////////////////////////////////// 00028 // Class : TexGenAttrib 00029 // Description : Computes texture coordinates for geometry 00030 // automatically based on vertex position and/or normal. 00031 // This can be used to implement reflection and/or 00032 // refraction maps, for instance to make shiny surfaces, 00033 // as well as other special effects such as projective 00034 // texturing. 00035 //////////////////////////////////////////////////////////////////// 00036 class EXPCL_PANDA_PGRAPH TexGenAttrib : public RenderAttrib { 00037 PUBLISHED: 00038 // We inherit the definition of our Mode enumerated type from 00039 // RenderAttrib. Normally, Mode would be defined here, but we 00040 // define it in the base class instead as a hack to avoid a problem 00041 // with circular includes. 00042 typedef RenderAttrib::TexGenMode Mode; 00043 00044 protected: 00045 INLINE TexGenAttrib(); 00046 INLINE TexGenAttrib(const TexGenAttrib ©); 00047 00048 public: 00049 virtual ~TexGenAttrib(); 00050 00051 PUBLISHED: 00052 static CPT(RenderAttrib) make(); 00053 static CPT(RenderAttrib) make(TextureStage *stage, Mode mode); 00054 static CPT(RenderAttrib) make_default(); 00055 00056 CPT(RenderAttrib) add_stage(TextureStage *stage, Mode mode) const; 00057 CPT(RenderAttrib) add_stage(TextureStage *stage, Mode mode, const string &source_name, const NodePath &light) const; 00058 CPT(RenderAttrib) add_stage(TextureStage *stage, Mode mode, const LTexCoord3 &constant_value) const; 00059 CPT(RenderAttrib) remove_stage(TextureStage *stage) const; 00060 00061 bool is_empty() const; 00062 bool has_stage(TextureStage *stage) const; 00063 Mode get_mode(TextureStage *stage) const; 00064 bool has_gen_texcoord_stage(TextureStage *stage) const; 00065 string get_source_name(TextureStage *stage) const; 00066 NodePath get_light(TextureStage *stage) const; 00067 const LTexCoord3 &get_constant_value(TextureStage *stage) const; 00068 00069 INLINE int get_geom_rendering(int geom_rendering) const; 00070 00071 public: 00072 typedef pset<TextureStage *> LightVectors; 00073 INLINE const LightVectors &get_light_vectors() const; 00074 00075 virtual void output(ostream &out) const; 00076 00077 protected: 00078 virtual int compare_to_impl(const RenderAttrib *other) const; 00079 virtual size_t get_hash_impl() const; 00080 virtual CPT(RenderAttrib) compose_impl(const RenderAttrib *other) const; 00081 virtual CPT(RenderAttrib) invert_compose_impl(const RenderAttrib *other) const; 00082 virtual CPT(RenderAttrib) get_auto_shader_attrib_impl(const RenderState *state) const; 00083 00084 private: 00085 class ModeDef; 00086 void filled_stages(); 00087 void record_stage(TextureStage *stage, ModeDef &mode_def); 00088 00089 class ModeDef { 00090 public: 00091 INLINE ModeDef(); 00092 INLINE int compare_to(const ModeDef &other) const; 00093 Mode _mode; 00094 string _source_name; 00095 NodePath _light; 00096 LTexCoord3 _constant_value; 00097 }; 00098 typedef pmap<PT(TextureStage), ModeDef> Stages; 00099 Stages _stages; 00100 00101 // This is a set of TextureStage pointers for which texture 00102 // coordinates will not be needed from the Geom. It's redundant; 00103 // it's almost the same set that is listed in _stages, above. It's 00104 // just here as an optimization during rendering. 00105 typedef pset<TextureStage *> NoTexCoordStages; 00106 NoTexCoordStages _no_texcoords; 00107 00108 // This is another optimization during rendering; it lists the 00109 // texture stages (if any) that use M_light_vector. 00110 LightVectors _light_vectors; 00111 00112 // This element is only used during reading from a bam file. It has 00113 // no meaningful value any other time. 00114 pvector<Mode> _read_modes; 00115 00116 int _num_point_sprites; 00117 int _num_light_vectors; 00118 00119 // _point_geom_rendering is the GeomRendering bits that are added by 00120 // the TexGenAttrib if there are any points in the Geom. 00121 // _geom_rendering is the GeomRendering bits that are added 00122 // regardless of the kind of Geom it is. 00123 int _point_geom_rendering; 00124 int _geom_rendering; 00125 00126 static CPT(RenderAttrib) _empty_attrib; 00127 00128 PUBLISHED: 00129 static int get_class_slot() { 00130 return _attrib_slot; 00131 } 00132 virtual int get_slot() const { 00133 return get_class_slot(); 00134 } 00135 00136 public: 00137 static void register_with_read_factory(); 00138 virtual void write_datagram(BamWriter *manager, Datagram &dg); 00139 virtual int complete_pointers(TypedWritable **plist, BamReader *manager); 00140 00141 protected: 00142 static TypedWritable *make_from_bam(const FactoryParams ¶ms); 00143 void fillin(DatagramIterator &scan, BamReader *manager); 00144 00145 public: 00146 static TypeHandle get_class_type() { 00147 return _type_handle; 00148 } 00149 static void init_type() { 00150 RenderAttrib::init_type(); 00151 register_type(_type_handle, "TexGenAttrib", 00152 RenderAttrib::get_class_type()); 00153 _attrib_slot = register_slot(_type_handle, 100, make_default); 00154 } 00155 virtual TypeHandle get_type() const { 00156 return get_class_type(); 00157 } 00158 virtual TypeHandle force_init_type() {init_type(); return get_class_type();} 00159 00160 private: 00161 static TypeHandle _type_handle; 00162 static int _attrib_slot; 00163 }; 00164 00165 #include "texGenAttrib.I" 00166 00167 #endif 00168