1 // tileentry.hxx -- routines to handle an individual scenery tile
3 // Written by Curtis Olson, started May 1998.
5 // Copyright (C) 1998, 1999 Curtis L. Olson - curt@flightgear.org
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #ifndef _TILEENTRY_HXX
25 #define _TILEENTRY_HXX
29 # error This library requires C++
43 #include <Include/compiler.h>
48 #include <sg.h> // plib includes
50 #include <Bucket/newbucket.hxx>
51 #include <Math/mat3.h>
52 #include <Math/point3d.hxx>
53 #include <Objects/fragment.hxx>
55 #ifdef FG_HAVE_NATIVE_SGI_COMPILERS
63 typedef vector < Point3D > point_list;
64 typedef point_list::iterator point_list_iterator;
65 typedef point_list::const_iterator const_point_list_iterator;
82 typedef vector < fgFRAGMENT > container;
83 typedef container::iterator FragmentIterator;
84 typedef container::const_iterator FragmentConstIterator;
87 // node list (the per fragment face lists reference this node list)
91 // global tile culling data
93 double bounding_radius;
96 // model view matrix for this tile
97 GLfloat model_view[16];
99 // this tile's official location in the world
100 FGBucket tile_bucket;
102 // the tile cache will mark here if the tile is being used
105 container fragment_list;
110 FGTileEntry ( void );
113 ~FGTileEntry ( void );
115 FragmentIterator begin() { return fragment_list.begin(); }
116 FragmentConstIterator begin() const { return fragment_list.begin(); }
118 FragmentIterator end() { return fragment_list.end(); }
119 FragmentConstIterator end() const { return fragment_list.end(); }
121 void add_fragment( fgFRAGMENT& frag ) {
122 frag.tile_ptr = this;
123 fragment_list.push_back( frag );
126 size_t num_fragments() const {
127 return fragment_list.size();
130 // Step through the fragment list, deleting the display list, then
131 // the fragment, until the list is empty.
132 void release_fragments();
134 // Calculate this tile's offset
135 void SetOffset( const Point3D& off)
137 offset = center - off;
140 // Return this tile's offset
141 inline Point3D get_offset( void ) const { return offset; }
143 // Calculate the model_view transformation matrix for this tile
144 inline void update_view_matrix(GLfloat *MODEL_VIEW)
147 #if defined( USE_MEM ) || defined( WIN32 )
148 memcpy( model_view, MODEL_VIEW, 16*sizeof(GLfloat) );
150 bcopy( MODEL_VIEW, model_view, 16*sizeof(GLfloat) );
153 // This is equivalent to doing a glTranslatef(x, y, z);
154 model_view[12] += (model_view[0]*offset.x() +
155 model_view[4]*offset.y() +
156 model_view[8]*offset.z());
157 model_view[13] += (model_view[1]*offset.x() +
158 model_view[5]*offset.y() +
159 model_view[9]*offset.z());
160 model_view[14] += (model_view[2]*offset.x() +
161 model_view[6]*offset.y() +
162 model_view[10]*offset.z() );
163 // m[15] += (m[3]*x + m[7]*y + m[11]*z);
164 // m[3] m7[] m[11] are 0.0 see LookAt() in views.cxx
165 // so m[15] is unchanged
168 inline bool is_unused() const { return state == Unused; }
169 inline bool is_loaded() const { return state == Loaded; }
171 inline void mark_unused() { state = Unused; }
172 inline void mark_scheduled() { state = Scheduled; }
173 inline void mark_loaded() { state = Loaded; }
177 typedef vector < FGTileEntry > tile_list;
178 typedef tile_list::iterator tile_list_iterator;
179 typedef tile_list::const_iterator const_tile_list_iterator;
182 #endif // _TILEENTRY_HXX