Panda3D
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00001 // Filename: stBasicTerrain.h 00002 // Created by: drose (12Oct10) 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 STBASICTERRAIN_H 00016 #define STBASICTERRAIN_H 00017 00018 #include "pandabase.h" 00019 #include "stTerrain.h" 00020 #include "luse.h" 00021 #include "pvector.h" 00022 00023 //////////////////////////////////////////////////////////////////// 00024 // Class : STBasicTerrain 00025 // Description : A specific implementation of STTerrain that supports 00026 // basic heightmaps loaded from an image file, as 00027 // described in a terrain.txt file similar to those 00028 // provided with the SpeedTree example application. 00029 //////////////////////////////////////////////////////////////////// 00030 class EXPCL_PANDASPEEDTREE STBasicTerrain : public STTerrain { 00031 PUBLISHED: 00032 STBasicTerrain(); 00033 STBasicTerrain(const STBasicTerrain ©); 00034 virtual ~STBasicTerrain(); 00035 00036 void clear(); 00037 00038 bool setup_terrain(const Filename &terrain_filename); 00039 bool setup_terrain(istream &in, const Filename &pathname); 00040 00041 INLINE void set_height_map(const Filename &height_map); 00042 INLINE const Filename &get_height_map() const; 00043 00044 virtual void load_data(); 00045 00046 INLINE PN_stdfloat get_size() const; 00047 virtual PN_stdfloat get_height(PN_stdfloat x, PN_stdfloat y) const; 00048 virtual PN_stdfloat get_smooth_height(PN_stdfloat x, PN_stdfloat y, PN_stdfloat radius) const; 00049 virtual PN_stdfloat get_slope(PN_stdfloat x, PN_stdfloat y) const; 00050 00051 virtual void fill_vertices(GeomVertexData *data, 00052 PN_stdfloat start_x, PN_stdfloat start_y, 00053 PN_stdfloat size_xy, int num_xy) const; 00054 00055 virtual void output(ostream &out) const; 00056 virtual void write(ostream &out, int indent_level = 0) const; 00057 00058 protected: 00059 bool read_height_map(); 00060 void compute_slope(PN_stdfloat smoothing); 00061 00062 INLINE PN_stdfloat interpolate(PN_stdfloat a, PN_stdfloat b, PN_stdfloat t); 00063 00064 private: 00065 static void read_quoted_filename(Filename &result, istream &in, 00066 const Filename &dirname); 00067 00068 protected: 00069 template<class ValueType> 00070 class InterpolationData { 00071 public: 00072 InterpolationData(); 00073 void reset(int width, int height); 00074 00075 ValueType get_nearest_neighbor(PN_stdfloat u, PN_stdfloat v) const; 00076 ValueType calc_bilinear_interpolation(PN_stdfloat u, PN_stdfloat v) const; 00077 ValueType calc_smooth(PN_stdfloat u, PN_stdfloat v, PN_stdfloat radius) const; 00078 bool is_present() const; 00079 00080 int _width; 00081 int _height; 00082 pvector<ValueType> _data; 00083 }; 00084 00085 protected: 00086 Filename _height_map; 00087 PN_stdfloat _size; 00088 PN_stdfloat _height_scale; 00089 00090 InterpolationData<PN_stdfloat> _height_data; 00091 //InterpolationData<LVector3> _normal_data; 00092 InterpolationData<PN_stdfloat> _slope_data; 00093 //InterpolationData<unsigned char> _ao_data; 00094 00095 public: 00096 static TypeHandle get_class_type() { 00097 return _type_handle; 00098 } 00099 static void init_type() { 00100 STTerrain::init_type(); 00101 register_type(_type_handle, "STBasicTerrain", 00102 STTerrain::get_class_type()); 00103 } 00104 virtual TypeHandle get_type() const { 00105 return get_class_type(); 00106 } 00107 virtual TypeHandle force_init_type() {init_type(); return get_class_type();} 00108 00109 private: 00110 static TypeHandle _type_handle; 00111 }; 00112 00113 #include "stBasicTerrain.I" 00114 00115 #endif