1 // fragment.hxx -- routines to handle "atomic" display objects
3 // Written by Curtis Olson, started August 1998.
5 // Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
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.
22 // (Log is kept at end of this file)
30 # error This library requires C++
44 #if defined ( __sun__ )
45 extern "C" void *memmove(void *, const void *, size_t);
46 extern "C" void *memset(void *, int, size_t);
49 #include <list> // STL list
51 #include <Bucket/bucketutils.h>
52 #include <Include/fg_types.h>
53 #include "Include/fg_constants.h"
54 #include <Math/mat3.h>
56 #ifdef NEEDNAMESPACESTD
61 // Maximum nodes per tile
62 #define MAX_NODES 2000
65 // Forward declarations
74 explicit fgFACE( int a = 0, int b =0, int c =0 )
75 : n1(a), n2(b), n3(c) {}
77 fgFACE( const fgFACE & image )
78 : n1(image.n1), n2(image.n2), n3(image.n3) {}
82 bool operator < ( const fgFACE & rhs ) { return n1 < rhs.n1; }
86 operator == ( const fgFACE& lhs, const fgFACE & rhs )
88 return (lhs.n1 == rhs.n1) && (lhs.n2 == rhs.n2) && (lhs.n3 == rhs.n3);
91 // Object fragment data class
95 // culling data for this object fragment (fine grain culling)
97 double bounding_radius;
99 // variable offset data for this object fragment for this frame
100 // fgCartesianPoint3d tile_offset;
102 // saved transformation matrix for this fragment (used by renderer)
103 // GLfloat matrix[16];
105 // tile_ptr & material_ptr are set so that when we traverse the
106 // list of fragments we can quickly reference back the tile or
107 // material property this fragment is assigned to.
109 // material property pointer
110 fgMATERIAL *material_ptr;
115 // OpenGL display list for fragment data
118 // face list (this indexes into the master tile vertex list)
119 typedef list < fgFACE > container;
120 typedef container::iterator iterator;
121 typedef container::const_iterator const_iterator;
125 // number of faces in this fragment
128 // Add a face to the face list
129 void add_face(int n1, int n2, int n3) {
130 faces.push_back( fgFACE(n1,n2,n3) );
134 // test if line intesects with this fragment. p0 and p1 are the
135 // two line end points of the line. If side_flag is true, check
136 // to see that end points are on opposite sides of face. Returns
137 // 1 if it intersection found, 0 otherwise. If it intesects,
138 // result is the point of intersection
139 int intersect( const fgPoint3d *end0,
140 const fgPoint3d *end1,
142 fgPoint3d *result) const;
146 fgFRAGMENT ( const fgFRAGMENT &image );
149 ~fgFRAGMENT() { faces.erase( faces.begin(), faces.end() ); }
152 fgFRAGMENT & operator = ( const fgFRAGMENT & rhs );
154 bool operator < ( const fgFRAGMENT & rhs ) {
155 // This is completely arbitrary. It satisfies RW's STL implementation
156 return bounding_radius < rhs.bounding_radius;
160 faces.erase( faces.begin(), faces.end() );
164 void deleteDisplayList() {
165 xglDeleteLists( display_list, 1 );
170 operator == ( const fgFRAGMENT & lhs, const fgFRAGMENT & rhs ) {
171 return (( lhs.center.x - rhs.center.x ) < FG_EPSILON &&
172 ( lhs.center.y - rhs.center.y ) < FG_EPSILON &&
173 ( lhs.center.z - rhs.center.z ) < FG_EPSILON );
177 #endif // _FRAGMENT_HXX
181 // Revision 1.2 1998/09/01 19:03:08 curt
182 // Changes contributed by Bernie Bright <bbright@c031.aone.net.au>
183 // - The new classes in libmisc.tgz define a stream interface into zlib.
184 // I've put these in a new directory, Lib/Misc. Feel free to rename it
185 // to something more appropriate. However you'll have to change the
186 // include directives in all the other files. Additionally you'll have
187 // add the library to Lib/Makefile.am and Simulator/Main/Makefile.am.
189 // The StopWatch class in Lib/Misc requires a HAVE_GETRUSAGE autoconf
190 // test so I've included the required changes in config.tgz.
192 // There are a fair few changes to Simulator/Objects as I've moved
193 // things around. Loading tiles is quicker but thats not where the delay
194 // is. Tile loading takes a few tenths of a second per file on a P200
195 // but it seems to be the post-processing that leads to a noticeable
196 // blip in framerate. I suppose its time to start profiling to see where
199 // I've included a brief description of each archives contents.
204 // C++ stream interface into zlib.
205 // Taken from zlib-1.1.3/contrib/iostream/.
206 // Minor mods for STL compatibility.
207 // There's no copyright associated with these so I assume they're
208 // covered by zlib's.
212 // FlightGear input stream using gz_ifstream. Tries to open the
213 // given filename. If that fails then filename is examined and a
214 // ".gz" suffix is removed or appended and that file is opened.
217 // A simple timer for benchmarking. Not used in production code.
218 // Taken from the Blitz++ project. Covered by GPL.
222 // Some simple string manipulation routines.
224 // Simulator/Airports/
225 // Load airports database using fgstream.
226 // Changed fgAIRPORTS to use set<> instead of map<>.
227 // Added bool fgAIRPORTS::search() as a neater way doing the lookup.
228 // Returns true if found.
231 // Modified fgStarsInit() to load stars database using fgstream.
233 // Simulator/Objects/
234 // Modified fgObjLoad() to use fgstream.
235 // Modified fgMATERIAL_MGR::load_lib() to use fgstream.
236 // Many changes to fgMATERIAL.
237 // Some changes to fgFRAGMENT but I forget what!
239 // Revision 1.1 1998/08/25 16:51:23 curt
240 // Moved from ../Scenery