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++
41 #include <simgear/xgl/xgl.h>
43 #include <simgear/compiler.h>
48 #include <plib/ssg.h> // plib includes
50 #include <simgear/bucket/newbucket.hxx>
51 #include <simgear/math/point3d.hxx>
61 typedef vector < Point3D > point_list;
62 typedef point_list::iterator point_list_iterator;
63 typedef point_list::const_iterator const_point_list_iterator;
71 typedef vector < sgVec3 * > free_vec3_list;
72 typedef vector < sgVec2 * > free_vec2_list;
73 typedef vector < unsigned short * > free_index_list;
79 // global tile culling data
81 double bounding_radius;
84 // this tile's official location in the world
87 // list of pointers to memory chunks that need to be freed when
88 // tile entry goes away
89 free_vec3_list vec3_ptrs;
90 free_vec2_list vec2_ptrs;
91 free_index_list index_ptrs;
93 // ssg tree structure for this tile is as follows:
95 // - ssgBranch(terrain)
96 // - ssgSelector(tile)
97 // - ssgTransform(tile)
98 // - ssgRangeSelector(tile)
105 // selector (turn tile on/off)
106 ssgSelector *select_ptr;
108 // pointer to ssg transform for this tile
109 ssgTransform *transform_ptr;
111 // pointer to ssg range selector for this tile
112 ssgRangeSelector *range_ptr;
122 // Clean up the memory used by this tile and delete the arrays
123 // used by ssg as well as the whole ssg branch
126 // Calculate this tile's offset
127 void SetOffset( const Point3D& p)
132 // Return this tile's offset
133 inline Point3D get_offset() const { return offset; }
135 // Update the ssg transform node for this tile so it can be
136 // properly drawn relative to our (0,0,0) point
137 inline void prep_ssg_node( const Point3D& p, float vis) {
140 // #define USE_UP_AND_COMING_PLIB_FEATURE
141 #ifdef USE_UP_AND_COMING_PLIB_FEATURE
142 range_ptr->setRange( 0, SG_ZERO );
143 range_ptr->setRange( 1, vis + bounding_radius );
147 ranges[1] = vis + bounding_radius;
148 range_ptr->setRanges( ranges, 2 );
151 sgSetVec3( sgTrans, offset.x(), offset.y(), offset.z() );
152 transform_ptr->setTransform( sgTrans );
155 // when a tile is still in the cache, but not in the immediate
156 // draw l ist, it can still remain in the scene graph, but we use
157 // a range selector to disable it from ever being drawn.
162 #endif // _TILEENTRY_HXX