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 <ssg.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 keep track here if the tile is being used
105 container fragment_list;
107 // ssg related structures
112 // pointer to ssg branch;
113 ssgTransform *branch_ptr;
118 FGTileEntry ( void );
121 ~FGTileEntry ( void );
123 FragmentIterator begin() { return fragment_list.begin(); }
124 FragmentConstIterator begin() const { return fragment_list.begin(); }
126 FragmentIterator end() { return fragment_list.end(); }
127 FragmentConstIterator end() const { return fragment_list.end(); }
129 void add_fragment( fgFRAGMENT& frag ) {
130 frag.tile_ptr = this;
131 fragment_list.push_back( frag );
134 size_t num_fragments() const {
135 return fragment_list.size();
138 // Step through the fragment list, deleting the display list, then
139 // the fragment, until the list is empty.
140 void release_fragments();
142 // Calculate this tile's offset
143 void SetOffset( const Point3D& off)
145 offset = center - off;
148 // Return this tile's offset
149 inline Point3D get_offset( void ) const { return offset; }
151 // Calculate the model_view transformation matrix for this tile
152 inline void update_view_matrix(GLfloat *MODEL_VIEW)
155 #if defined( USE_MEM ) || defined( WIN32 )
156 memcpy( model_view, MODEL_VIEW, 16*sizeof(GLfloat) );
158 bcopy( MODEL_VIEW, model_view, 16*sizeof(GLfloat) );
161 // This is equivalent to doing a glTranslatef(x, y, z);
162 model_view[12] += (model_view[0]*offset.x() +
163 model_view[4]*offset.y() +
164 model_view[8]*offset.z());
165 model_view[13] += (model_view[1]*offset.x() +
166 model_view[5]*offset.y() +
167 model_view[9]*offset.z());
168 model_view[14] += (model_view[2]*offset.x() +
169 model_view[6]*offset.y() +
170 model_view[10]*offset.z() );
171 // m[15] += (m[3]*x + m[7]*y + m[11]*z);
172 // m[3] m7[] m[11] are 0.0 see LookAt() in views.cxx
173 // so m[15] is unchanged
176 inline bool is_unused() const { return state == Unused; }
177 inline bool is_loaded() const { return state == Loaded; }
179 inline void mark_unused() { state = Unused; }
180 inline void mark_scheduled() { state = Scheduled; }
181 inline void mark_loaded() { state = Loaded; }
185 typedef vector < FGTileEntry > tile_list;
186 typedef tile_list::iterator tile_list_iterator;
187 typedef tile_list::const_iterator const_tile_list_iterator;
190 #endif // _TILEENTRY_HXX