326 lines
8.7 KiB
C++
326 lines
8.7 KiB
C++
//
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// getapt.cxx -- generate airport scenery from the given definition file
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//
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// Written by Curtis Olson, started September 1998.
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//
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// Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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// (Log is kept at end of this file)
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#include <string> // Standard C++ string library
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#include <vector>
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#include "Include/fg_stl_config.h"
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#ifdef NEEDNAMESPACESTD
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using namespace std;
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#endif
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#include <Debug/logstream.hxx>
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// #include <Include/fg_types.h>
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#include <Math/fg_geodesy.hxx>
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#include <Math/mat3.h>
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#include <Math/point3d.hxx>
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#include <Math/polar3d.hxx>
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#include <Misc/fgstream.hxx>
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#include <Objects/material.hxx>
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// #include <gpc/gpc.h>
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#include "genapt.hxx"
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typedef vector < Point3D > container;
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typedef container::iterator iterator;
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typedef container::const_iterator const_iterator;
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#define FG_APT_BASE_TEX_CONSTANT 2000.0
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// Calculate texture coordinates for a given point.
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static Point3D calc_tex_coords(double *node, const Point3D& ref) {
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Point3D cp;
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Point3D pp;
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cp = Point3D( node[0] + ref.x(), node[1] + ref.y(), node[2] + ref.z() );
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pp = fgCartToPolar3d(cp);
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pp.setx( fmod(FG_APT_BASE_TEX_CONSTANT * pp.x(), 10.0) );
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pp.sety( fmod(FG_APT_BASE_TEX_CONSTANT * pp.y(), 10.0) );
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if ( pp.x() < 0.0 ) {
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pp.setx( pp.x() + 10.0 );
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}
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if ( pp.y() < 0.0 ) {
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pp.sety( pp.y() + 10.0 );
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}
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return(pp);
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}
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// generate the actual base area for the airport
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static void
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gen_base( const Point3D& average, const container& perimeter, fgTILE *t)
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{
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GLint display_list;
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Point3D cart, cart_trans, tex;
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MAT3vec normal;
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double dist, max_dist, temp;
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int center_num, i;
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fgFRAGMENT fragment;
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max_dist = 0.0;
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FG_LOG( FG_TERRAIN, FG_INFO,
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"generating airport base for size = " << perimeter.size() );
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fragment.init();
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fragment.tile_ptr = t;
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// find airport base material in the properties list
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if ( ! material_mgr.find( APT_BASE_MATERIAL, fragment.material_ptr )) {
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FG_LOG( FG_TERRAIN, FG_ALERT,
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"Ack! unknown material name = " << APT_BASE_MATERIAL
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<< " in fgAptGenerat()" );
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}
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FG_LOG( FG_TERRAIN, FG_INFO,
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" tile center = "
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<< t->center.x() << " " << t->center.y() << " " << t->center.z() );
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FG_LOG( FG_TERRAIN, FG_INFO,
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" airport center = "
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<< average.x() << " " << average.y() << " " << average.z() );
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fragment.center = average;
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normal[0] = average.x();
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normal[1] = average.y();
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normal[2] = average.z();
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MAT3_NORMALIZE_VEC(normal, temp);
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display_list = xglGenLists(1);
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xglNewList(display_list, GL_COMPILE);
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xglBegin(GL_TRIANGLE_FAN);
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// first point center of fan
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cart_trans = average - t->center;
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t->nodes[t->ncount][0] = cart_trans.x();
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t->nodes[t->ncount][1] = cart_trans.y();
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t->nodes[t->ncount][2] = cart_trans.z();
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center_num = t->ncount;
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t->ncount++;
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tex = calc_tex_coords( t->nodes[t->ncount-1], t->center );
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xglTexCoord2f(tex.x(), tex.y());
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xglNormal3dv(normal);
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xglVertex3dv(t->nodes[t->ncount-1]);
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// first point on perimeter
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const_iterator current = perimeter.begin();
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cart = fgGeodToCart( *current );
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cart_trans = cart - t->center;
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t->nodes[t->ncount][0] = cart_trans.x();
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t->nodes[t->ncount][1] = cart_trans.y();
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t->nodes[t->ncount][2] = cart_trans.z();
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t->ncount++;
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i = 1;
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tex = calc_tex_coords( t->nodes[i], t->center );
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dist = cart.distance3D(average);
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if ( dist > max_dist ) {
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max_dist = dist;
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}
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xglTexCoord2f(tex.x(), tex.y());
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xglVertex3dv(t->nodes[i]);
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++current;
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++i;
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const_iterator last = perimeter.end();
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for ( ; current != last; ++current ) {
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cart = fgGeodToCart( *current );
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cart_trans = cart - t->center;
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t->nodes[t->ncount][0] = cart_trans.x();
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t->nodes[t->ncount][1] = cart_trans.y();
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t->nodes[t->ncount][2] = cart_trans.z();
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t->ncount++;
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fragment.add_face(center_num, i - 1, i);
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tex = calc_tex_coords( t->nodes[i], t->center );
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dist = cart.distance3D(average);
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if ( dist > max_dist ) {
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max_dist = dist;
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}
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xglTexCoord2f(tex.x(), tex.y());
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xglVertex3dv(t->nodes[i]);
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i++;
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}
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// last point (first point in perimeter list)
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current = perimeter.begin();
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cart = fgGeodToCart( *current );
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cart_trans = cart - t->center;
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fragment.add_face(center_num, i - 1, 1);
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tex = calc_tex_coords( t->nodes[1], t->center );
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xglTexCoord2f(tex.x(), tex.y());
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xglVertex3dv(t->nodes[1]);
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xglEnd();
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xglEndList();
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fragment.bounding_radius = max_dist;
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fragment.display_list = display_list;
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t->fragment_list.push_back(fragment);
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}
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// Load a .apt file and register the GL fragments with the
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// corresponding tile
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int
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fgAptGenerate(const string& path, fgTILE *tile)
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{
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string token;
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string apt_id, apt_name;
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char c;
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int i = 1;
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// face list (this indexes into the master tile vertex list)
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container perimeter;
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Point3D p, average;
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double avex = 0.0, avey = 0.0, avez = 0.0;
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int size;
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// gpc_vertex p_2d, list_2d[MAX_PERIMETER];
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// gpc_vertex_list perimeter_2d;
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fg_gzifstream in( path );
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if ( !in ) {
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// exit immediately assuming an airport file for this tile
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// doesn't exist.
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return 0;
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}
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apt_id = "";
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// read in each line of the file
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in >> skipcomment;
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while ( ! in.eof() )
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{
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in >> token;
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if ( token == "a" ) {
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// airport info record (start of airport)
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if ( apt_id != "" ) {
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// we have just finished reading and airport record.
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// process the info
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gen_base(average, perimeter, tile);
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}
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FG_LOG( FG_TERRAIN, FG_INFO, "Reading airport record" );
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in >> apt_id;
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apt_name = "";
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i = 1;
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avex = avey = avez = 0.0;
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perimeter.erase( perimeter.begin(), perimeter.end() );
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// skip to end of line.
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while ( in.get(c) && c != '\n' ) {
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apt_name += c;
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}
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FG_LOG( FG_TERRAIN, FG_INFO,
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"\tID = " << apt_id << " Name = " << apt_name );
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} else if ( token == "p" ) {
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// airport area bounding polygon coordinate. These
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// specify a convex hull that should already have been cut
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// out of the base terrain. The points are given in
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// counter clockwise order and are specified in lon/lat
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// degrees.
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in >> p;
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avex += tile->nodes[i][0];
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avey += tile->nodes[i][1];
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avez += tile->nodes[i][2];
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perimeter.push_back(p);
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++i;
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} else if ( token == "r" ) {
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// runway record
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// skip for now
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while ( in.get(c) && c != '\n' );
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}
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in >> skipcomment;
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}
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if ( apt_id != "" ) {
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// we have just finished reading and airport record.
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// process the info
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size = perimeter.size();
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average = Point3D( avex / (double)size + tile->center.x(),
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avey / (double)size + tile->center.y(),
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avez / (double)size + tile->center.z() );
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gen_base(average, perimeter, tile);
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}
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return 1;
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}
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// $Log$
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// Revision 1.10 1998/11/07 19:07:06 curt
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// Enable release builds using the --without-logging option to the configure
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// script. Also a couple log message cleanups, plus some C to C++ comment
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// conversion.
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//
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// Revision 1.9 1998/11/06 21:17:32 curt
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// Converted to new logstream debugging facility. This allows release
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// builds with no messages at all (and no performance impact) by using
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// the -DFG_NDEBUG flag.
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//
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// Revision 1.8 1998/11/06 14:46:59 curt
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// Changes to track Bernie's updates to fgstream.
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//
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// Revision 1.7 1998/10/20 18:26:06 curt
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// Updates to point3d.hxx
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//
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// Revision 1.6 1998/10/18 01:17:16 curt
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// Point3D tweaks.
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//
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// Revision 1.5 1998/10/16 23:27:14 curt
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// C++-ifying.
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//
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// Revision 1.4 1998/10/16 00:51:46 curt
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// Converted to Point3D class.
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//
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// Revision 1.3 1998/09/21 20:55:00 curt
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// Used the cartesian form of the airport area coordinates to determine the
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// center.
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//
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// Revision 1.2 1998/09/14 12:44:30 curt
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// Don't recalculate perimeter points since it is not likely that they will match
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// exactly with the previously calculated points, which will leave an ugly gap
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// around the airport area.
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//
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// Revision 1.1 1998/09/14 02:14:01 curt
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// Initial revision of genapt.[ch]xx for generating airport scenery.
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//
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//
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