2 // getapt.cxx -- generate airport scenery from the given definition file
4 // Written by Curtis Olson, started September 1998.
6 // Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
8 // This program is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU General Public License as
10 // published by the Free Software Foundation; either version 2 of the
11 // License, or (at your option) any later version.
13 // This program is distributed in the hope that it will be useful, but
14 // WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 // (Log is kept at end of this file)
26 #include <string> // Standard C++ string library
28 #include "Include/fg_stl_config.h"
30 #ifdef NEEDNAMESPACESTD
34 #include <Debug/logstream.hxx>
35 // #include <Include/fg_types.h>
36 #include <Math/fg_geodesy.hxx>
37 #include <Math/mat3.h>
38 #include <Math/point3d.hxx>
39 #include <Math/polar3d.hxx>
40 #include <Misc/fgstream.hxx>
41 #include <Objects/material.hxx>
43 // #include <gpc/gpc.h>
48 typedef vector < Point3D > container;
49 typedef container::iterator iterator;
50 typedef container::const_iterator const_iterator;
53 #define FG_APT_BASE_TEX_CONSTANT 2000.0
55 // Calculate texture coordinates for a given point.
56 static Point3D calc_tex_coords(double *node, const Point3D& ref) {
60 cp = Point3D( node[0] + ref.x(), node[1] + ref.y(), node[2] + ref.z() );
62 pp = fgCartToPolar3d(cp);
64 pp.setx( fmod(FG_APT_BASE_TEX_CONSTANT * pp.x(), 10.0) );
65 pp.sety( fmod(FG_APT_BASE_TEX_CONSTANT * pp.y(), 10.0) );
68 pp.setx( pp.x() + 10.0 );
72 pp.sety( pp.y() + 10.0 );
79 // generate the actual base area for the airport
81 gen_base( const Point3D& average, const container& perimeter, fgTILE *t)
84 Point3D cart, cart_trans, tex;
86 double dist, max_dist, temp;
93 cout << "generating airport base for size = " << perimeter.size() << "\n";
96 fragment.tile_ptr = t;
98 // find airport base material in the properties list
99 if ( ! material_mgr.find( APT_BASE_MATERIAL, fragment.material_ptr )) {
100 FG_LOG( FG_TERRAIN, FG_ALERT,
101 "Ack! unknown material name = " << APT_BASE_MATERIAL
102 << " in fgAptGenerat()" );
105 printf(" tile center = %.2f %.2f %.2f\n",
106 t->center.x(), t->center.y(), t->center.z() );
107 printf(" airport center = %.2f %.2f %.2f\n",
108 average.x(), average.y(), average.z());
109 fragment.center = average;
111 normal[0] = average.x();
112 normal[1] = average.y();
113 normal[2] = average.z();
114 MAT3_NORMALIZE_VEC(normal, temp);
116 display_list = xglGenLists(1);
117 xglNewList(display_list, GL_COMPILE);
118 xglBegin(GL_TRIANGLE_FAN);
120 // first point center of fan
121 cart_trans = average - t->center;
122 t->nodes[t->ncount][0] = cart_trans.x();
123 t->nodes[t->ncount][1] = cart_trans.y();
124 t->nodes[t->ncount][2] = cart_trans.z();
125 center_num = t->ncount;
128 tex = calc_tex_coords( t->nodes[t->ncount-1], t->center );
129 xglTexCoord2f(tex.x(), tex.y());
130 xglNormal3dv(normal);
131 xglVertex3dv(t->nodes[t->ncount-1]);
133 // first point on perimeter
134 const_iterator current = perimeter.begin();
135 cart = fgGeodToCart( *current );
136 cart_trans = cart - t->center;
137 t->nodes[t->ncount][0] = cart_trans.x();
138 t->nodes[t->ncount][1] = cart_trans.y();
139 t->nodes[t->ncount][2] = cart_trans.z();
143 tex = calc_tex_coords( t->nodes[i], t->center );
144 dist = cart.distance3D(average);
145 if ( dist > max_dist ) {
148 xglTexCoord2f(tex.x(), tex.y());
149 xglVertex3dv(t->nodes[i]);
153 const_iterator last = perimeter.end();
154 for ( ; current != last; ++current ) {
155 cart = fgGeodToCart( *current );
156 cart_trans = cart - t->center;
157 t->nodes[t->ncount][0] = cart_trans.x();
158 t->nodes[t->ncount][1] = cart_trans.y();
159 t->nodes[t->ncount][2] = cart_trans.z();
161 fragment.add_face(center_num, i - 1, i);
163 tex = calc_tex_coords( t->nodes[i], t->center );
164 dist = cart.distance3D(average);
165 if ( dist > max_dist ) {
168 xglTexCoord2f(tex.x(), tex.y());
169 xglVertex3dv(t->nodes[i]);
173 // last point (first point in perimeter list)
174 current = perimeter.begin();
175 cart = fgGeodToCart( *current );
176 cart_trans = cart - t->center;
177 fragment.add_face(center_num, i - 1, 1);
179 tex = calc_tex_coords( t->nodes[1], t->center );
180 xglTexCoord2f(tex.x(), tex.y());
181 xglVertex3dv(t->nodes[1]);
186 fragment.bounding_radius = max_dist;
187 fragment.display_list = display_list;
189 t->fragment_list.push_back(fragment);
193 // Load a .apt file and register the GL fragments with the
194 // corresponding tile
196 fgAptGenerate(const string& path, fgTILE *tile)
199 string apt_id, apt_name;
203 // face list (this indexes into the master tile vertex list)
206 double avex = 0.0, avey = 0.0, avez = 0.0;
209 // gpc_vertex p_2d, list_2d[MAX_PERIMETER];
210 // gpc_vertex_list perimeter_2d;
212 fg_gzifstream in( path );
214 // exit immediately assuming an airport file for this tile
221 // read in each line of the file
227 if ( token == "a" ) {
228 // airport info record (start of airport)
230 if ( apt_id != "" ) {
231 // we have just finished reading and airport record.
233 gen_base(average, perimeter, tile);
236 cout << "Reading airport record\n";
240 avex = avey = avez = 0.0;
241 perimeter.erase( perimeter.begin(), perimeter.end() );
242 // skip to end of line.
243 while ( in.get(c) && c != '\n' ) {
246 cout << "\tID = " + apt_id + " Name = " + apt_name + "\n";
247 } else if ( token == "p" ) {
248 // airport area bounding polygon coordinate. These
249 // specify a convex hull that should already have been cut
250 // out of the base terrain. The points are given in
251 // counter clockwise order and are specified in lon/lat
254 avex += tile->nodes[i][0];
255 avey += tile->nodes[i][1];
256 avez += tile->nodes[i][2];
257 perimeter.push_back(p);
259 } else if ( token == "r" ) {
262 while ( in.get(c) && c != '\n' );
268 if ( apt_id != "" ) {
269 // we have just finished reading and airport record.
271 size = perimeter.size();
272 average = Point3D( avex / (double)size + tile->center.x(),
273 avey / (double)size + tile->center.y(),
274 avez / (double)size + tile->center.z() );
276 gen_base(average, perimeter, tile);
284 // Revision 1.9 1998/11/06 21:17:32 curt
285 // Converted to new logstream debugging facility. This allows release
286 // builds with no messages at all (and no performance impact) by using
287 // the -DFG_NDEBUG flag.
289 // Revision 1.8 1998/11/06 14:46:59 curt
290 // Changes to track Bernie's updates to fgstream.
292 // Revision 1.7 1998/10/20 18:26:06 curt
293 // Updates to point3d.hxx
295 // Revision 1.6 1998/10/18 01:17:16 curt
298 // Revision 1.5 1998/10/16 23:27:14 curt
301 // Revision 1.4 1998/10/16 00:51:46 curt
302 // Converted to Point3D class.
304 // Revision 1.3 1998/09/21 20:55:00 curt
305 // Used the cartesian form of the airport area coordinates to determine the
308 // Revision 1.2 1998/09/14 12:44:30 curt
309 // Don't recalculate perimeter points since it is not likely that they will match
310 // exactly with the previously calculated points, which will leave an ugly gap
311 // around the airport area.
313 // Revision 1.1 1998/09/14 02:14:01 curt
314 // Initial revision of genapt.[ch]xx for generating airport scenery.