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/fg_debug.h>
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;
54 // Calculate distance between to Point3D's
55 static double calc_dist(const Point3D& p1, const Point3D& p2) {
60 return sqrt(x*x + y*y + z*z);
65 #define FG_APT_BASE_TEX_CONSTANT 2000.0
68 // Calculate texture coordinates for a given point.
70 calc_tex_coords(const fgPoint3d& p) {
73 cout << "Texture coordinates = " <<
74 FG_APT_BASE_TEX_CONSTANT * p.lon << " " <<
75 FG_APT_BASE_TEX_CONSTANT * p.lat << "\n";
77 tex.x = fmod(FG_APT_BASE_TEX_CONSTANT * p.lon, 10.0);
78 tex.y = fmod(FG_APT_BASE_TEX_CONSTANT * p.lat, 10.0);
88 cout << "Texture coordinates = " << tex.x << " " << tex.y << "\n";
95 // Calculate texture coordinates for a given point.
96 static Point3D calc_tex_coords(double *node, const Point3D& ref) {
100 cp.setvals( node[0] + ref.x(), node[1] + ref.y(), node[2] + ref.z() );
102 pp = fgCartToPolar3d(cp);
104 pp.setx( fmod(FG_APT_BASE_TEX_CONSTANT * pp.x(), 10.0) );
105 pp.sety( fmod(FG_APT_BASE_TEX_CONSTANT * pp.y(), 10.0) );
107 if ( pp.x() < 0.0 ) {
108 pp.setx( pp.x() + 10.0 );
111 if ( pp.y() < 0.0 ) {
112 pp.sety( pp.y() + 10.0 );
119 // generate the actual base area for the airport
121 gen_base( const Point3D& average, const container& perimeter, fgTILE *t)
124 Point3D cart, cart_trans, tex;
126 double dist, max_dist, temp;
133 cout << "generating airport base for size = " << perimeter.size() << "\n";
136 fragment.tile_ptr = t;
138 // find airport base material in the properties list
139 if ( ! material_mgr.find( APT_BASE_MATERIAL, fragment.material_ptr )) {
140 fgPrintf( FG_TERRAIN, FG_ALERT,
141 "Ack! unknown material name = %s in fgAptGenerat()\n",
145 printf(" tile center = %.2f %.2f %.2f\n",
146 t->center.x(), t->center.y(), t->center.z() );
147 printf(" airport center = %.2f %.2f %.2f\n",
148 average.x(), average.y(), average.z());
149 fragment.center = average;
151 normal[0] = average.x();
152 normal[1] = average.y();
153 normal[2] = average.z();
154 MAT3_NORMALIZE_VEC(normal, temp);
156 display_list = xglGenLists(1);
157 xglNewList(display_list, GL_COMPILE);
158 xglBegin(GL_TRIANGLE_FAN);
160 // first point center of fan
161 cart_trans = average - t->center;
162 t->nodes[t->ncount][0] = cart_trans.x();
163 t->nodes[t->ncount][1] = cart_trans.y();
164 t->nodes[t->ncount][2] = cart_trans.z();
165 center_num = t->ncount;
168 tex = calc_tex_coords( t->nodes[t->ncount-1], t->center );
169 xglTexCoord2f(tex.x(), tex.y());
170 xglNormal3dv(normal);
171 xglVertex3dv(t->nodes[t->ncount-1]);
173 // first point on perimeter
174 const_iterator current = perimeter.begin();
175 cart = fgGeodToCart( *current );
176 cart_trans = cart - t->center;
177 t->nodes[t->ncount][0] = cart_trans.x();
178 t->nodes[t->ncount][1] = cart_trans.y();
179 t->nodes[t->ncount][2] = cart_trans.z();
183 tex = calc_tex_coords( t->nodes[i], t->center );
184 dist = distance3D(average, cart);
185 if ( dist > max_dist ) {
188 xglTexCoord2f(tex.x(), tex.y());
189 xglVertex3dv(t->nodes[i]);
193 const_iterator last = perimeter.end();
194 for ( ; current != last; ++current ) {
195 cart = fgGeodToCart( *current );
196 cart_trans = cart - t->center;
197 t->nodes[t->ncount][0] = cart_trans.x();
198 t->nodes[t->ncount][1] = cart_trans.y();
199 t->nodes[t->ncount][2] = cart_trans.z();
201 fragment.add_face(center_num, i - 1, i);
203 tex = calc_tex_coords( t->nodes[i], t->center );
204 dist = distance3D(average, cart);
205 if ( dist > max_dist ) {
208 xglTexCoord2f(tex.x(), tex.y());
209 xglVertex3dv(t->nodes[i]);
213 // last point (first point in perimeter list)
214 current = perimeter.begin();
215 cart = fgGeodToCart( *current );
216 cart_trans = cart - t->center;
217 fragment.add_face(center_num, i - 1, 1);
219 tex = calc_tex_coords( t->nodes[1], t->center );
220 xglTexCoord2f(tex.x(), tex.y());
221 xglVertex3dv(t->nodes[1]);
226 fragment.bounding_radius = max_dist;
227 fragment.display_list = display_list;
229 t->fragment_list.push_back(fragment);
233 // Load a .apt file and register the GL fragments with the
234 // corresponding tile
236 fgAptGenerate(const string& path, fgTILE *tile)
239 string apt_id, apt_name;
243 // face list (this indexes into the master tile vertex list)
246 double avex = 0.0, avey = 0.0, avez = 0.0;
249 // gpc_vertex p_2d, list_2d[MAX_PERIMETER];
250 // gpc_vertex_list perimeter_2d;
252 fg_gzifstream in( path );
254 // exit immediately assuming an airport file for this tile
261 // read in each line of the file
265 in.stream() >> token;
267 if ( token == "a" ) {
268 // airport info record (start of airport)
270 if ( apt_id != "" ) {
271 // we have just finished reading and airport record.
273 gen_base(average, perimeter, tile);
276 cout << "Reading airport record\n";
277 in.stream() >> apt_id;
280 avex = avey = avez = 0.0;
281 perimeter.erase( perimeter.begin(), perimeter.end() );
282 // skip to end of line.
283 while ( in.get(c) && c != '\n' ) {
286 cout << "\tID = " + apt_id + " Name = " + apt_name + "\n";
287 } else if ( token == "p" ) {
288 // airport area bounding polygon coordinate. These
289 // specify a convex hull that should already have been cut
290 // out of the base terrain. The points are given in
291 // counter clockwise order and are specified in lon/lat
294 avex += tile->nodes[i][0];
295 avey += tile->nodes[i][1];
296 avez += tile->nodes[i][2];
297 perimeter.push_back(p);
299 } else if ( token == "r" ) {
302 while ( in.get(c) && c != '\n' );
305 // airports.insert(a);
309 if ( apt_id != "" ) {
310 // we have just finished reading and airport record.
312 size = perimeter.size();
313 average.setvals( avex / (double)size + tile->center.x(),
314 avey / (double)size + tile->center.y(),
315 avez / (double)size + tile->center.z() );
317 gen_base(average, perimeter, tile);
325 // Revision 1.5 1998/10/16 23:27:14 curt
328 // Revision 1.4 1998/10/16 00:51:46 curt
329 // Converted to Point3D class.
331 // Revision 1.3 1998/09/21 20:55:00 curt
332 // Used the cartesian form of the airport area coordinates to determine the
335 // Revision 1.2 1998/09/14 12:44:30 curt
336 // Don't recalculate perimeter points since it is not likely that they will match
337 // exactly with the previously calculated points, which will leave an ugly gap
338 // around the airport area.
340 // Revision 1.1 1998/09/14 02:14:01 curt
341 // Initial revision of genapt.[ch]xx for generating airport scenery.