Panda3D
|
00001 // Filename: alphaTestAttrib.h 00002 // Created by: drose (04Mar02) 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 ALPHATESTATTRIB_H 00016 #define ALPHATESTATTRIB_H 00017 00018 #include "pandabase.h" 00019 #include "renderAttrib.h" 00020 00021 class FactoryParams; 00022 00023 //////////////////////////////////////////////////////////////////// 00024 // Class : AlphaTestAttrib 00025 // Description : Enables or disables writing of pixel to framebuffer 00026 // based on its alpha value relative to a reference alpha value 00027 //////////////////////////////////////////////////////////////////// 00028 class EXPCL_PANDA_PGRAPH AlphaTestAttrib : public RenderAttrib { 00029 private: 00030 INLINE AlphaTestAttrib(PandaCompareFunc mode = M_always, 00031 PN_stdfloat reference_alpha = 1.0f); 00032 00033 PUBLISHED: 00034 static CPT(RenderAttrib) make(PandaCompareFunc mode, 00035 PN_stdfloat reference_alpha); 00036 static CPT(RenderAttrib) make_default(); 00037 00038 INLINE PN_stdfloat get_reference_alpha() const; 00039 INLINE PandaCompareFunc get_mode() const; 00040 00041 public: 00042 virtual void output(ostream &out) const; 00043 00044 protected: 00045 virtual int compare_to_impl(const RenderAttrib *other) const; 00046 virtual size_t get_hash_impl() const; 00047 virtual CPT(RenderAttrib) get_auto_shader_attrib_impl(const RenderState *state) const; 00048 00049 private: 00050 PandaCompareFunc _mode; 00051 PN_stdfloat _reference_alpha; // should be in range [0.0-1.0] 00052 00053 PUBLISHED: 00054 static int get_class_slot() { 00055 return _attrib_slot; 00056 } 00057 virtual int get_slot() const { 00058 return get_class_slot(); 00059 } 00060 00061 public: 00062 static void register_with_read_factory(); 00063 virtual void write_datagram(BamWriter *manager, Datagram &dg); 00064 00065 protected: 00066 static TypedWritable *make_from_bam(const FactoryParams ¶ms); 00067 void fillin(DatagramIterator &scan, BamReader *manager); 00068 00069 public: 00070 static TypeHandle get_class_type() { 00071 return _type_handle; 00072 } 00073 static void init_type() { 00074 RenderAttrib::init_type(); 00075 register_type(_type_handle, "AlphaTestAttrib", 00076 RenderAttrib::get_class_type()); 00077 _attrib_slot = register_slot(_type_handle, 100, make_default); 00078 } 00079 virtual TypeHandle get_type() const { 00080 return get_class_type(); 00081 } 00082 virtual TypeHandle force_init_type() {init_type(); return get_class_type();} 00083 00084 private: 00085 static TypeHandle _type_handle; 00086 static int _attrib_slot; 00087 }; 00088 00089 #include "alphaTestAttrib.I" 00090 00091 #endif 00092