From c3e838f5ab73b96a1ec86968d53edbe31b77149e Mon Sep 17 00:00:00 2001 From: curt Date: Mon, 14 Sep 1998 02:14:00 +0000 Subject: [PATCH] Initial revision of genapt.[ch]xx for generating airport scenery. --- Airports/Makefile.am | 4 +- Airports/genapt.cxx | 330 +++++++++++++++++++++++++++++++++++++++++++ Airports/genapt.hxx | 67 +++++++++ 3 files changed, 400 insertions(+), 1 deletion(-) create mode 100644 Airports/genapt.cxx create mode 100644 Airports/genapt.hxx diff --git a/Airports/Makefile.am b/Airports/Makefile.am index 8982bb40d..250420518 100644 --- a/Airports/Makefile.am +++ b/Airports/Makefile.am @@ -1,5 +1,7 @@ noinst_LIBRARIES = libAirports.a -libAirports_a_SOURCES = simple.cxx simple.hxx +libAirports_a_SOURCES = \ + genapt.cxx genapt.hxx \ + simple.cxx simple.hxx INCLUDES += -I$(top_builddir) -I$(top_builddir)/Lib -I$(top_builddir)/Simulator diff --git a/Airports/genapt.cxx b/Airports/genapt.cxx new file mode 100644 index 000000000..f2a2d1f61 --- /dev/null +++ b/Airports/genapt.cxx @@ -0,0 +1,330 @@ +// +// getapt.cxx -- generate airport scenery from the given definition file +// +// Written by Curtis Olson, started September 1998. +// +// Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License as +// published by the Free Software Foundation; either version 2 of the +// License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +// +// $Id$ +// (Log is kept at end of this file) + + +#include // Standard C++ string library +#include +#include "Include/fg_stl_config.h" + +#ifdef NEEDNAMESPACESTD +using namespace std; +#endif + +#include +#include +#include +#include +#include +#include +#include + +// #include + +#include "genapt.hxx" + + +typedef vector < fgPoint3d > container; +typedef container::iterator iterator; +typedef container::const_iterator const_iterator; + + +// Calculate distance between to fgPoint3d's +static double calc_dist(const fgPoint3d& p1, const fgPoint3d& p2) { + double x, y, z; + x = p1.x - p2.x; + y = p1.y - p2.y; + z = p1.z - p2.z; + return sqrt(x*x + y*y + z*z); +} + + +// convert a geodetic point lon(degrees), lat(degrees), elev(meter) to a +// cartesian point +static fgPoint3d geod_to_cart(fgPoint3d geod) { + fgPoint3d cart; + fgPoint3d geoc; + double sl_radius; + + // printf("A geodetic point is (%.2f, %.2f, %.2f)\n", geod[0], + // geod[1], geod[2]); + + geoc.lon = geod.lon*DEG_TO_RAD; + fgGeodToGeoc(geod.lat*DEG_TO_RAD, geod.radius, &sl_radius, &geoc.lat); + + // printf("A geocentric point is (%.2f, %.2f, %.2f)\n", gc_lon, + // gc_lat, sl_radius+geod[2]); */ + + geoc.radius = sl_radius + geod.radius; + cart = fgPolarToCart3d(geoc); + + // printf("A cart point is (%.8f, %.8f, %.8f)\n", cp.x, cp.y, cp.z); + + return cart; +} + + +#define FG_APT_BASE_TEX_CONSTANT 2000.0 + +// Calculate texture coordinates for a given point. +static fgPoint3d +calc_tex_coords(const fgPoint3d& p) { + fgPoint3d tex; + + cout << "Texture coordinates = " << + FG_APT_BASE_TEX_CONSTANT * p.lon << " " << + FG_APT_BASE_TEX_CONSTANT * p.lat << "\n"; + + tex.x = fmod(FG_APT_BASE_TEX_CONSTANT * p.lon, 10.0); + tex.y = fmod(FG_APT_BASE_TEX_CONSTANT * p.lat, 10.0); + + if ( tex.x < 0.0 ) { + tex.x += 10.0; + } + + if ( tex.y < 0.0 ) { + tex.y += 10.0; + } + + cout << "Texture coordinates = " << tex.x << " " << tex.y << "\n"; + + return tex; +} + + +// generate the actual base area for the airport +static void +gen_base( const fgPoint3d& average, const container& perimeter, fgTILE *t) +{ + GLint display_list; + fgPoint3d ave_cart, cart, cart_trans, tex; + MAT3vec normal; + double dist, max_dist, temp; + int center_num, i; + + fgFRAGMENT fragment; + + max_dist = 0.0; + + cout << "generating airport base for size = " << perimeter.size() << "\n"; + + fragment.init(); + fragment.tile_ptr = t; + + // find airport base material in the properties list + if ( ! material_mgr.find( APT_BASE_MATERIAL, fragment.material_ptr )) { + fgPrintf( FG_TERRAIN, FG_ALERT, + "Ack! unknown material name = %s in fgAptGenerat()\n", + APT_BASE_MATERIAL ); + } + + ave_cart = geod_to_cart( average ); + printf(" tile center = %.2f %.2f %.2f\n", + t->center.x, t->center.y, t->center.z); + printf(" airport center = %.2f %.2f %.2f\n", + average.x, average.y, average.z); + printf(" airport center = %.2f %.2f %.2f\n", + ave_cart.x, ave_cart.y, ave_cart.z); + fragment.center.x = ave_cart.x; + fragment.center.y = ave_cart.y; + fragment.center.z = ave_cart.z; + + normal[0] = ave_cart.x; + normal[1] = ave_cart.y; + normal[2] = ave_cart.z; + MAT3_NORMALIZE_VEC(normal, temp); + + display_list = xglGenLists(1); + xglNewList(display_list, GL_COMPILE); + xglBegin(GL_TRIANGLE_FAN); + + // center of fan + cart_trans.x = ave_cart.x - t->center.x; + cart_trans.y = ave_cart.y - t->center.y; + cart_trans.z = ave_cart.z - t->center.z; + t->nodes[t->ncount][0] = cart_trans.x; + t->nodes[t->ncount][1] = cart_trans.y; + t->nodes[t->ncount][2] = cart_trans.z; + t->ncount++; + + tex = calc_tex_coords( average ); + xglTexCoord2f(tex.x, tex.y); + xglNormal3dv(normal); + xglVertex3d(cart_trans.x, cart_trans.y, cart_trans.z); + + // first point (center of fan) + iterator current = perimeter.begin(); + cart = geod_to_cart( *current ); + cart_trans.x = cart.x - t->center.x; + cart_trans.y = cart.y - t->center.y; + cart_trans.z = cart.z - t->center.z; + center_num = t->ncount; + t->nodes[t->ncount][0] = cart_trans.x; + t->nodes[t->ncount][1] = cart_trans.y; + t->nodes[t->ncount][2] = cart_trans.z; + t->ncount++; + + tex = calc_tex_coords( *current ); + dist = calc_dist(ave_cart, cart); + if ( dist > max_dist ) { + max_dist = dist; + } + xglTexCoord2f(tex.x, tex.y); + xglVertex3d(cart_trans.x, cart_trans.y, cart_trans.z); + + const_iterator last = perimeter.end(); + for ( ; current != last; ++current ) { + cart = geod_to_cart( *current ); + cart_trans.x = cart.x - t->center.x; + cart_trans.y = cart.y - t->center.y; + cart_trans.z = cart.z - t->center.z; + t->nodes[t->ncount][0] = cart_trans.x; + t->nodes[t->ncount][1] = cart_trans.y; + t->nodes[t->ncount][2] = cart_trans.z; + t->ncount++; + fragment.add_face(center_num, t->ncount - 2, t->ncount - 1); + + tex = calc_tex_coords( *current ); + dist = calc_dist(ave_cart, cart); + if ( dist > max_dist ) { + max_dist = dist; + } + xglTexCoord2f(tex.x, tex.y); + xglVertex3d(cart_trans.x, cart_trans.y, cart_trans.z); + } + + // last point (first point in perimeter list) + current = perimeter.begin(); + cart = geod_to_cart( *current ); + cart_trans.x = cart.x - t->center.x; + cart_trans.y = cart.y - t->center.y; + cart_trans.z = cart.z - t->center.z; + fragment.add_face(center_num, t->ncount - 1, center_num + 1); + + tex = calc_tex_coords( *current ); + xglTexCoord2f(tex.x, tex.y); + xglVertex3d(cart_trans.x, cart_trans.y, cart_trans.z); + + xglEnd(); + xglEndList(); + + fragment.bounding_radius = max_dist; + fragment.display_list = display_list; + + t->fragment_list.push_back(fragment); +} + + +// Load a .apt file and register the GL fragments with the +// corresponding tile +int +fgAptGenerate(const string& path, fgTILE *tile) +{ + string token; + string apt_id, apt_name; + char c; + + // face list (this indexes into the master tile vertex list) + container perimeter; + fgPoint3d p, average; + int size; + + // gpc_vertex p_2d, list_2d[MAX_PERIMETER]; + // gpc_vertex_list perimeter_2d; + + fg_gzifstream in( path ); + if ( !in ) { + // exit immediately assuming an airport file for this tile + // doesn't exist. + return 0; + } + + apt_id = ""; + + // read in each line of the file + in.eat_comments(); + while ( ! in.eof() ) + { + in.stream() >> token; + + if ( token == "a" ) { + // airport info record (start of airport) + + if ( apt_id != "" ) { + // we have just finished reading and airport record. + // process the info + gen_base(average, perimeter, tile); + } + + cout << "Reading airport record\n"; + in.stream() >> apt_id; + apt_name = ""; + average.lon = average.lat = average.radius = 0.0; + perimeter.erase( perimeter.begin(), perimeter.end() ); + // skip to end of line. + while ( in.get(c) && c != '\n' ) { + apt_name += c; + } + cout << "\tID = " + apt_id + " Name = " + apt_name + "\n"; + } else if ( token == "p" ) { + // airport area bounding polygon coordinate. These + // specify a convex hull that should already have been cut + // out of the base terrain. The points are given in + // counter clockwise order and are specified in lon/lat + // degrees. + in.stream() >> p.lon >> p.lat >> p.radius; + average.lon += p.lon; + average.lat += p.lat; + average.radius += p.radius; + perimeter.push_back(p); + } else if ( token == "r" ) { + // runway record + // skip for now + while ( in.get(c) && c != '\n' ); + } + + // airports.insert(a); + in.eat_comments(); + } + + if ( apt_id != "" ) { + // we have just finished reading and airport record. + // process the info + size = perimeter.size(); + average.lon /= (double)size; + average.lat /= (double)size; + average.radius /= (double)size; + + gen_base(average, perimeter, tile); + } + + return 1; +} + + +// $Log$ +// Revision 1.1 1998/09/14 02:14:01 curt +// Initial revision of genapt.[ch]xx for generating airport scenery. +// +// + diff --git a/Airports/genapt.hxx b/Airports/genapt.hxx new file mode 100644 index 000000000..68a629115 --- /dev/null +++ b/Airports/genapt.hxx @@ -0,0 +1,67 @@ +// +// getapt.hxx -- generate airport scenery from the given definition file +// +// Written by Curtis Olson, started September 1998. +// +// Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License as +// published by the Free Software Foundation; either version 2 of the +// License, or (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, but +// WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +// +// $Id$ +// (Log is kept at end of this file) + + +#ifndef _GENAPT_HXX +#define _GENAPT_HXX + + +#ifndef __cplusplus +# error This library requires C++ +#endif + + +#include // Standard C++ string library +#include +#include "Include/fg_stl_config.h" + +#ifdef NEEDNAMESPACESTD +using namespace std; +#endif + +#include + + +// maximum size of airport perimeter structure, even for complex +// airports such as KORD this number is typically not very big. +#define MAX_PERIMETER 20 + +// name of the material to use for the airport base +#define APT_BASE_MATERIAL "grass" + + +// Load a .apt file and register the GL fragments with the +// corresponding tile +int +fgAptGenerate(const string& path, fgTILE *tile); + + +#endif /* _AIRPORTS_HXX */ + + +// $Log$ +// Revision 1.1 1998/09/14 02:14:01 curt +// Initial revision of genapt.[ch]xx for generating airport scenery. +// +// -- 2.39.2