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flightgear/AssemTris/assemtris.c

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/* splittris.c -- reassemble the pieces produced by splittris
*
* Written by Curtis Olson, started January 1998.
*
* Copyright (C) 1997 Curtis L. Olson - curt@infoplane.com
*
* 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 <math.h>
#include <stdio.h>
#include <stdlib.h> /* for atoi() */
#include <string.h>
#include <sys/stat.h> /* for stat() */
#include <unistd.h> /* for stat() */
#include "assemtris.h"
#include <Include/fg_constants.h>
#include <Include/fg_types.h>
// #include <Math/fg_geodesy.h>
// #include <Math/mat3.h>
// #include <Math/polar.h>
#include <Bucket/bucketutils.h>
int nodecount = 0;
static double nodes[MAX_NODES][3];
struct fgBUCKET my_index;
struct fgBUCKET ne_index, nw_index, sw_index, se_index;
struct fgBUCKET north_index, south_index, east_index, west_index;
/* return the file base name ( foo/bar/file.ext = file.ext ) */
void extract_file(char *in, char *base) {
int len, i;
len = strlen(in);
i = len - 1;
while ( (i >= 0) && (in[i] != '/') ) {
i--;
}
in += (i + 1);
strcpy(base, in);
}
/* return the file path name ( foo/bar/file.ext = foo/bar ) */
void extract_path(char *in, char *base) {
int len, i;
len = strlen(in);
strcpy(base, in);
i = len - 1;
while ( (i >= 0) && (in[i] != '/') ) {
i--;
}
base[i] = '\0';
}
/* check if a file exists */
int file_exists(char *file) {
struct stat stat_buf;
int result;
printf("checking %s ... ", file);
result = stat(file, &stat_buf);
if ( result != 0 ) {
/* stat failed, no file */
printf("not found.\n");
return(0);
} else {
/* stat succeeded, file exists */
printf("exists.\n");
return(1);
}
}
/* check to see if a shared object exists */
int shared_object_exists(char *basepath, char *ext, char *file) {
char scene_path[256];
long int index;
if ( strcmp(ext, ".sw") == 0 ) {
fgBucketGenBasePath(&my_index, scene_path);
index = fgBucketGenIndex(&my_index);
sprintf(file, "%s/%s/%ld.1.sw", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
fgBucketGenBasePath(&west_index, scene_path);
index = fgBucketGenIndex(&west_index);
sprintf(file, "%s/%s/%ld.1.se", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
fgBucketGenBasePath(&sw_index, scene_path);
index = fgBucketGenIndex(&sw_index);
sprintf(file, "%s/%s/%ld.1.ne", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
fgBucketGenBasePath(&south_index, scene_path);
index = fgBucketGenIndex(&south_index);
sprintf(file, "%s/%s/%ld.1.nw", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
}
if ( strcmp(ext, ".se") == 0 ) {
fgBucketGenBasePath(&my_index, scene_path);
index = fgBucketGenIndex(&my_index);
sprintf(file, "%s/%s/%ld.1.se", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
fgBucketGenBasePath(&east_index, scene_path);
index = fgBucketGenIndex(&east_index);
sprintf(file, "%s/%s/%ld.1.sw", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
fgBucketGenBasePath(&se_index, scene_path);
index = fgBucketGenIndex(&se_index);
sprintf(file, "%s/%s/%ld.1.nw", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
fgBucketGenBasePath(&south_index, scene_path);
index = fgBucketGenIndex(&south_index);
sprintf(file, "%s/%s/%ld.1.ne", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
}
if ( strcmp(ext, ".ne") == 0 ) {
fgBucketGenBasePath(&my_index, scene_path);
index = fgBucketGenIndex(&my_index);
sprintf(file, "%s/%s/%ld.1.ne", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
fgBucketGenBasePath(&east_index, scene_path);
index = fgBucketGenIndex(&east_index);
sprintf(file, "%s/%s/%ld.1.nw", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
fgBucketGenBasePath(&ne_index, scene_path);
index = fgBucketGenIndex(&ne_index);
sprintf(file, "%s/%s/%ld.1.sw", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
fgBucketGenBasePath(&north_index, scene_path);
index = fgBucketGenIndex(&north_index);
sprintf(file, "%s/%s/%ld.1.se", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
}
if ( strcmp(ext, ".nw") == 0 ) {
fgBucketGenBasePath(&my_index, scene_path);
index = fgBucketGenIndex(&my_index);
sprintf(file, "%s/%s/%ld.1.nw", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
fgBucketGenBasePath(&west_index, scene_path);
index = fgBucketGenIndex(&west_index);
sprintf(file, "%s/%s/%ld.1.ne", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
fgBucketGenBasePath(&nw_index, scene_path);
index = fgBucketGenIndex(&nw_index);
sprintf(file, "%s/%s/%ld.1.se", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
fgBucketGenBasePath(&north_index, scene_path);
index = fgBucketGenIndex(&north_index);
sprintf(file, "%s/%s/%ld.1.sw", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
}
if ( strcmp(ext, ".south") == 0 ) {
fgBucketGenBasePath(&my_index, scene_path);
index = fgBucketGenIndex(&my_index);
sprintf(file, "%s/%s/%ld.1.south", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
fgBucketGenBasePath(&south_index, scene_path);
index = fgBucketGenIndex(&south_index);
sprintf(file, "%s/%s/%ld.1.north", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
}
if ( strcmp(ext, ".north") == 0 ) {
fgBucketGenBasePath(&my_index, scene_path);
index = fgBucketGenIndex(&my_index);
sprintf(file, "%s/%s/%ld.1.north", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
fgBucketGenBasePath(&north_index, scene_path);
index = fgBucketGenIndex(&north_index);
sprintf(file, "%s/%s/%ld.1.south", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
}
if ( strcmp(ext, ".west") == 0 ) {
fgBucketGenBasePath(&my_index, scene_path);
index = fgBucketGenIndex(&my_index);
sprintf(file, "%s/%s/%ld.1.west", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
fgBucketGenBasePath(&west_index, scene_path);
index = fgBucketGenIndex(&west_index);
sprintf(file, "%s/%s/%ld.1.east", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
}
if ( strcmp(ext, ".east") == 0 ) {
fgBucketGenBasePath(&my_index, scene_path);
index = fgBucketGenIndex(&my_index);
sprintf(file, "%s/%s/%ld.1.east", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
fgBucketGenBasePath(&east_index, scene_path);
index = fgBucketGenIndex(&east_index);
sprintf(file, "%s/%s/%ld.1.west", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
}
if ( strcmp(ext, ".body") == 0 ) {
fgBucketGenBasePath(&my_index, scene_path);
index = fgBucketGenIndex(&my_index);
sprintf(file, "%s/%s/%ld.1.body", basepath, scene_path, index);
if ( file_exists(file) ) {
return(1);
}
}
return(0);
}
/* my custom file opening routine ... don't open if a shared edge or
* vertex alread exists */
FILE *my_open(char *basename, char *basepath, char *ext) {
FILE *fp;
char filename[256];
/* check if a shared object already exists */
if ( shared_object_exists(basepath, ext, filename) ) {
/* not an actual file open error, but we've already got the
* shared edge, so we don't want to create another one */
fp = fopen(filename, "r");
printf("Opening %s\n", filename);
return(fp);
} else {
/* open the file */
printf("not opening\n");
return(NULL);
}
}
/* given a file pointer, read all the gdn (geodetic nodes from it) */
void read_nodes(FILE *fp) {
char line[256];
while ( fgets(line, 250, fp) != NULL ) {
if ( strncmp(line, "gdn ", 4) == 0 ) {
sscanf(line, "gdn %lf %lf %lf\n", &nodes[nodecount][0],
&nodes[nodecount][1], &nodes[nodecount][2]);
/*
printf("read_nodes(%d) %.2f %.2f %.2f %s", nodecount,
nodes[nodecount][0], nodes[nodecount][1],
nodes[nodecount][2], line);
*/
nodecount++;
}
}
}
/* load in nodes from the various split and shared pieces to
* reconstruct a tile */
void build_node_list(char *basename, char *basepath) {
FILE *ne, *nw, *se, *sw, *north, *south, *east, *west, *body;
ne = my_open(basename, basepath, ".ne");
read_nodes(ne);
fclose(ne);
nw = my_open(basename, basepath, ".nw");
read_nodes(nw);
fclose(nw);
se = my_open(basename, basepath, ".se");
read_nodes(se);
fclose(se);
sw = my_open(basename, basepath, ".sw");
read_nodes(sw);
fclose(sw);
north = my_open(basename, basepath, ".north");
read_nodes(north);
fclose(north);
south = my_open(basename, basepath, ".south");
read_nodes(south);
fclose(south);
east = my_open(basename, basepath, ".east");
read_nodes(east);
fclose(east);
west = my_open(basename, basepath, ".west");
read_nodes(west);
fclose(west);
body = my_open(basename, basepath, ".body");
read_nodes(body);
fclose(body);
}
/* dump in WaveFront .obj format */
void dump_nodes(char *basename) {
char file[256];
FILE *fp;
int i, len;
/* generate output file name */
strcpy(file, basename);
len = strlen(file);
file[len-2] = '\0';
strcat(file, ".node");
/* dump vertices */
printf("Creating node file: %s\n", file);
printf(" writing vertices in .node format.\n");
fp = fopen(file, "w");
fprintf(fp, "%d 2 1 0\n", nodecount);
/* now write out actual node data */
for ( i = 0; i < nodecount; i++ ) {
fprintf(fp, "%d %.2f %.2f %.2f 0\n", i + 1,
nodes[i][0], nodes[i][1], nodes[i][2]);
}
fclose(fp);
}
int main(int argc, char **argv) {
char basename[256], basepath[256], temp[256];
long int tmp_index;
int len;
strcpy(basename, argv[1]);
/* find the base path of the file */
extract_path(basename, basepath);
extract_path(basepath, basepath);
extract_path(basepath, basepath);
printf("%s\n", basepath);
/* find the index of the current file */
extract_file(basename, temp);
len = strlen(temp);
if ( len >= 2 ) {
temp[len-2] = '\0';
}
tmp_index = atoi(temp);
printf("%ld\n", tmp_index);
fgBucketParseIndex(tmp_index, &my_index);
printf("bucket = %d %d %d %d\n",
my_index.lon, my_index.lat, my_index.x, my_index.y);
/* generate the indexes of the neighbors */
fgBucketOffset(&my_index, &ne_index, 1, 1);
fgBucketOffset(&my_index, &nw_index, -1, 1);
fgBucketOffset(&my_index, &se_index, 1, -1);
fgBucketOffset(&my_index, &sw_index, -1, -1);
fgBucketOffset(&my_index, &north_index, 0, 1);
fgBucketOffset(&my_index, &south_index, 0, -1);
fgBucketOffset(&my_index, &east_index, 1, 0);
fgBucketOffset(&my_index, &west_index, -1, 0);
/*
printf("Corner indexes = %ld %ld %ld %ld\n",
ne_index, nw_index, sw_index, se_index);
printf("Edge indexes = %ld %ld %ld %ld\n",
north_index, south_index, east_index, west_index);
*/
/* load the input data files */
build_node_list(basename, basepath);
/* dump in WaveFront .obj format */
dump_nodes(basename);
return(0);
}
/* $Log$
/* Revision 1.7 1998/04/14 02:26:00 curt
/* Code reorganizations. Added a Lib/ directory for more general libraries.
/*
* Revision 1.6 1998/04/08 22:54:58 curt
* Adopted Gnu automake/autoconf system.
*
* Revision 1.5 1998/03/03 16:00:52 curt
* More c++ compile tweaks.
*
* Revision 1.4 1998/01/31 00:41:23 curt
* Made a few changes converting floats to doubles.
*
* Revision 1.3 1998/01/27 18:37:00 curt
* Lots of updates to get back in sync with changes made over in .../Src/
*
* Revision 1.2 1998/01/15 21:33:36 curt
* Assembling triangles and building a new .node file with the proper shared
* vertices now works. Now we just have to use the shared normals and we'll
* be all set.
*
* Revision 1.1 1998/01/15 02:45:26 curt
* Initial revision.
*
*/
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