From: curt Date: Wed, 8 Jul 1998 14:54:52 +0000 (+0000) Subject: renamed *.[ch] to *.[ch]xx X-Git-Url: https://git.mxchange.org/?a=commitdiff_plain;h=4267b78a4d04be6e10c19063dadcde2504924a47;p=flightgear.git renamed *.[ch] to *.[ch]xx --- diff --git a/Tri2obj/tri2obj.c b/Tri2obj/tri2obj.c deleted file mode 100644 index f5a1a09f1..000000000 --- a/Tri2obj/tri2obj.c +++ /dev/null @@ -1,701 +0,0 @@ -/* tri2obj.c -- read in a .ele/.node file pair generated by the triangle - * program and output a simple Wavefront .obj file. - * - * Written by Curtis Olson, started October 1997. - * - * 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 -#include /* for atoi() */ -#include -#include /* for stat() */ -#include /* for stat() */ - -#include "tri2obj.h" - -#include -#include -#include - -#include -#include -#include - - -int nodecount, tricount; -int normalcount = 0; -static fgCartesianPoint3d nodes[MAX_NODES]; -static int tris[MAX_TRIS][3]; - -static double normals[MAX_NODES][3]; - -fgBUCKET my_index; -fgBUCKET ne_index, nw_index, sw_index, se_index; -fgBUCKET north_index, south_index, east_index, west_index; - -/* convert a geodetic point lon(arcsec), lat(arcsec), elev(meter) to - * a cartesian point */ -fgCartesianPoint3d geod_to_cart(double geod[3]) { - fgCartesianPoint3d cp; - fgPolarPoint3d pp; - double gc_lon, gc_lat, sl_radius; - - /* printf("A geodetic point is (%.2f, %.2f, %.2f)\n", - geod[0], geod[1], geod[2]); */ - - gc_lon = geod[0]*ARCSEC_TO_RAD; - fgGeodToGeoc(geod[1]*ARCSEC_TO_RAD, geod[2], &sl_radius, &gc_lat); - - /* printf("A geocentric point is (%.2f, %.2f, %.2f)\n", gc_lon, - gc_lat, sl_radius+geod[2]); */ - - pp.lon = gc_lon; - pp.lat = gc_lat; - pp.radius = sl_radius+geod[2]; - cp = fgPolarToCart3d(pp); - - /* printf("A cart point is (%.8f, %.8f, %.8f)\n", cp.x, cp.y, cp.z); */ - - return(cp); -} - - -/* given three points defining a triangle, calculate the normal */ -void calc_normal(fgCartesianPoint3d p1, fgCartesianPoint3d p2, - fgCartesianPoint3d p3, double normal[3]) -{ - double v1[3], v2[3]; - double temp; - - v1[0] = p2.x - p1.x; v1[1] = p2.y - p1.y; v1[2] = p2.z - p1.z; - v2[0] = p3.x - p1.x; v2[1] = p3.y - p1.y; v2[2] = p3.z - p1.z; - - MAT3cross_product(normal, v1, v2); - MAT3_NORMALIZE_VEC(normal, temp); - -/* printf(" Normal = %.2f %.2f %.2f\n", normal[0], normal[1], normal[2]); */ -} - - -/* return the index of all triangles containing the specified node */ -void find_tris(int n, int *t1, int *t2, int *t3, int *t4, int *t5) { - int i; - - *t1 = *t2 = *t3 = *t4 = *t5 = 0; - - i = 1; - while ( i <= tricount ) { - if ( (n == tris[i][0]) || (n == tris[i][1]) || (n == tris[i][2]) ) { - if ( *t1 == 0 ) { - *t1 = i; - } else if ( *t2 == 0 ) { - *t2 = i; - } else if ( *t3 == 0 ) { - *t3 = i; - } else if ( *t4 == 0 ) { - *t4 = i; - } else { - *t5 = i; - } - } - i++; - } -} - - -/* 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); -} - - -/* given a file pointer, read all the vn (normals from it) */ -void read_normals(FILE *fp) { - char line[256]; - - while ( fgets(line, 250, fp) != NULL ) { - if ( strncmp(line, "vn ", 3) == 0 ) { - sscanf( line, "vn %lf %lf %lf\n", - &normals[normalcount][0], - &normals[normalcount][1], - &normals[normalcount][2] ); - /* - printf("read_normals(%d) %.2f %.2f %.2f %s", normalcount, - normals[normalcount][0], normals[normalcount][1], - normals[normalcount][2], line); - */ - normalcount++; - } - } -} - - -/* 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); - } -} - - -/* Initialize a new mesh structure */ -void triload(char *basename, char *basepath) { - char nodename[256], elename[256]; - double n[3]; - FILE *ne, *nw, *se, *sw, *north, *south, *east, *west; - FILE *node, *ele; - int dim, junk1, junk2; - int i; - - ne = my_open(basename, basepath, ".ne"); - read_normals(ne); - fclose(ne); - - nw = my_open(basename, basepath, ".nw"); - read_normals(nw); - fclose(nw); - - se = my_open(basename, basepath, ".se"); - read_normals(se); - fclose(se); - - sw = my_open(basename, basepath, ".sw"); - read_normals(sw); - fclose(sw); - - north = my_open(basename, basepath, ".north"); - read_normals(north); - fclose(north); - - south = my_open(basename, basepath, ".south"); - read_normals(south); - fclose(south); - - east = my_open(basename, basepath, ".east"); - read_normals(east); - fclose(east); - - west = my_open(basename, basepath, ".west"); - read_normals(west); - fclose(west); - - strcpy(nodename, basename); - strcat(nodename, ".node"); - strcpy(elename, basename); - strcat(elename, ".ele"); - - printf("Loading node file: %s ...\n", nodename); - if ( (node = fopen(nodename, "r")) == NULL ) { - printf("Cannot open file '%s'\n", nodename); - exit(-1); - } - - fscanf(node, "%d %d %d %d", &nodecount, &dim, &junk1, &junk2); - - if ( nodecount > MAX_NODES - 1 ) { - printf("Error, too many nodes, need to increase array size\n"); - exit(-1); - } else { - printf(" Expecting %d nodes\n", nodecount); - } - - for ( i = 1; i <= nodecount; i++ ) { - fscanf(node, "%d %lf %lf %lf %d\n", &junk1, - &n[0], &n[1], &n[2], &junk2); - /* printf("%d %.2f %.2f %.2f\n", junk1, n[0], n[1], n[2]); */ - nodes[i] = geod_to_cart(n); - /* printf("%d %.2f %.2f %.2f\n", - junk1, nodes[i].x, nodes[i].y, nodes[i].z); */ - } - - fclose(node); - - printf("Loading element file: %s ...\n", elename); - if ( (ele = fopen(elename, "r")) == NULL ) { - printf("Cannot open file '%s'\n", elename); - exit(-1); - } - - fscanf(ele, "%d %d %d", &tricount, &junk1, &junk2); - - if ( tricount > MAX_TRIS - 1 ) { - printf("Error, too many elements, need to increase array size\n"); - exit(-1); - } else { - printf(" Expecting %d elements\n", tricount); - } - - for ( i = 1; i <= tricount; i++ ) { - fscanf(ele, "%d %d %d %d\n", &junk1, - &tris[i][0], &tris[i][1], &tris[i][2]); - /* printf("%d %d %d %d\n", junk1, tris[i][0], tris[i][1], tris[i][2]);*/ - } - - fclose(ele); -} - - -/* dump in WaveFront .obj format */ -void dump_obj(char *basename) { - char objname[256]; - double n1[3], n2[3], n3[3], n4[3], n5[3], norm[3], temp; - FILE *obj; - int i, t1, t2, t3, t4, t5, count; - - strcpy(objname, basename); - strcat(objname, ".obj"); - - printf("Dumping to file: %s ...\n", objname); - - obj = fopen(objname, "w"); - - /* dump vertices */ - printf(" writing vertices\n"); - for ( i = 1; i <= nodecount; i++ ) { - fprintf(obj, "v %.6f %.6f %.6f\n", - nodes[i].x, nodes[i].y, nodes[i].z); - } - - printf(" calculating and writing normals\n"); - printf(" First %d normals taken from shared files.\n", normalcount); - - /* calculate and generate normals */ - for ( i = 1; i <= nodecount; i++ ) { - - if ( i <= normalcount ) { - /* use precalculated (shared) normal */ - norm[0] = normals[i-1][0]; - norm[1] = normals[i-1][1]; - norm[2] = normals[i-1][2]; - } else { - /* printf("Finding normal\n"); */ - - find_tris(i, &t1, &t2, &t3, &t4, &t5); - - n1[0] = n1[1] = n1[2] = 0.0; - n2[0] = n2[1] = n2[2] = 0.0; - n3[0] = n3[1] = n3[2] = 0.0; - n4[0] = n4[1] = n4[2] = 0.0; - n5[0] = n5[1] = n5[2] = 0.0; - - count = 1; - calc_normal(nodes[tris[t1][0]], nodes[tris[t1][1]], - nodes[tris[t1][2]], n1); - - if ( t2 > 0 ) { - calc_normal(nodes[tris[t2][0]], nodes[tris[t2][1]], - nodes[tris[t2][2]], n2); - count = 2; - } - - if ( t3 > 0 ) { - calc_normal(nodes[tris[t3][0]], nodes[tris[t3][1]], - nodes[tris[t3][2]], n3); - count = 3; - } - - if ( t4 > 0 ) { - calc_normal(nodes[tris[t4][0]], nodes[tris[t4][1]], - nodes[tris[t4][2]], n4); - count = 4; - } - - if ( t5 > 0 ) { - calc_normal(nodes[tris[t5][0]], nodes[tris[t5][1]], - nodes[tris[t5][2]], n5); - count = 5; - } - - /* printf(" norm[2] = %.2f %.2f %.2f\n", n1[2], n2[2], n3[2]); */ - - norm[0] = ( n1[0] + n2[0] + n3[0] + n4[0] + n5[0] ) / (double)count; - norm[1] = ( n1[1] + n2[1] + n3[1] + n4[1] + n5[1] ) / (double)count; - norm[2] = ( n1[2] + n2[2] + n3[2] + n4[2] + n5[2] ) / (double)count; - - /* printf(" count = %d\n", count); */ - /* printf(" Ave. normal = %.4f %.4f %.4f\n", - norm[0], norm[1], norm[2]);*/ - MAT3_NORMALIZE_VEC(norm, temp); - /* printf(" Normalized ave. normal = %.4f %.4f %.4f\n", */ - /* norm[0], norm[1], norm[2]); */ - } - /* printf("%d vn %.4f %.4f %.4f\n", i, norm[0], norm[1], norm[2]); */ - fprintf(obj, "vn %.4f %.4f %.4f\n", norm[0], norm[1], norm[2]); - } - - /* dump faces */ - printf(" writing faces\n"); - for ( i = 1; i <= tricount; i++ ) { - fprintf(obj, "f %d %d %d\n", tris[i][0], tris[i][1], tris[i][2]); - } - - fclose(obj); -} - -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); - - /* load the input data files */ - triload(basename, basepath); - - /* dump in WaveFront .obj format */ - dump_obj(basename); - - return(0); -} - - -/* $Log$ -/* Revision 1.17 1998/07/04 00:56:40 curt -/* typedef'd struct fgBUCKET. -/* - * Revision 1.16 1998/05/23 15:20:41 curt - * Output more digits after the decimal place. - * - * Revision 1.15 1998/05/02 01:54:39 curt - * Converting to polar3d.h routines. - * - * Revision 1.14 1998/04/18 04:01:32 curt - * Now use libMath rather than having local copies of math routines. - * - * Revision 1.13 1998/04/14 02:26:11 curt - * Code reorganizations. Added a Lib/ directory for more general libraries. - * - * Revision 1.12 1998/04/08 23:22:18 curt - * Adopted Gnu automake/autoconf system. - * - * Revision 1.11 1998/03/03 16:01:00 curt - * More c++ compile tweaks. - * - * Revision 1.10 1998/01/31 00:41:27 curt - * Made a few changes converting floats to doubles. - * - * Revision 1.9 1998/01/27 18:37:04 curt - * Lots of updates to get back in sync with changes made over in .../Src/ - * - * Revision 1.8 1998/01/17 01:25:39 curt - * Added support for shared normals. - * - * Revision 1.7 1998/01/12 02:42:00 curt - * Average up to five triangles per vertex instead of three. - * - * Revision 1.6 1998/01/09 23:03:15 curt - * Restructured to split 1deg x 1deg dem's into 64 subsections. - * - * Revision 1.5 1997/12/08 19:17:50 curt - * Fixed a type in the normal generation code. - * - * Revision 1.4 1997/12/02 13:13:32 curt - * Fixed problem with averaged vertex normals. - * - * Revision 1.3 1997/11/15 18:05:05 curt - * minor tweaks ... - * - * Revision 1.2 1997/11/14 00:29:13 curt - * Transform scenery coordinates at this point in pipeline when scenery is - * being translated to .obj format, not when it is being loaded into the end - * renderer. Precalculate normals for each node as average of the normals - * of each containing polygon so Garoude shading is now supportable. - * - * Revision 1.1 1997/10/29 23:05:15 curt - * Initial revision. - * - */ diff --git a/Tri2obj/tri2obj.cxx b/Tri2obj/tri2obj.cxx new file mode 100644 index 000000000..732da5c03 --- /dev/null +++ b/Tri2obj/tri2obj.cxx @@ -0,0 +1,704 @@ +/* tri2obj.c -- read in a .ele/.node file pair generated by the triangle + * program and output a simple Wavefront .obj file. + * + * Written by Curtis Olson, started October 1997. + * + * 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 +#include /* for atoi() */ +#include +#include /* for stat() */ +#include /* for stat() */ + +#include "tri2obj.hxx" + +#include +#include +#include + +#include +#include +#include + + +int nodecount, tricount; +int normalcount = 0; +static fgPoint3d nodes[MAX_NODES]; +static int tris[MAX_TRIS][3]; + +static double normals[MAX_NODES][3]; + +fgBUCKET my_index; +fgBUCKET ne_index, nw_index, sw_index, se_index; +fgBUCKET north_index, south_index, east_index, west_index; + +/* convert a geodetic point lon(arcsec), lat(arcsec), elev(meter) to + * a cartesian point */ +fgPoint3d geod_to_cart(double geod[3]) { + fgPoint3d cp; + fgPoint3d pp; + double gc_lon, gc_lat, sl_radius; + + /* printf("A geodetic point is (%.2f, %.2f, %.2f)\n", + geod[0], geod[1], geod[2]); */ + + gc_lon = geod[0]*ARCSEC_TO_RAD; + fgGeodToGeoc(geod[1]*ARCSEC_TO_RAD, geod[2], &sl_radius, &gc_lat); + + /* printf("A geocentric point is (%.2f, %.2f, %.2f)\n", gc_lon, + gc_lat, sl_radius+geod[2]); */ + + pp.lon = gc_lon; + pp.lat = gc_lat; + pp.radius = sl_radius + geod[2]; + cp = fgPolarToCart3d(pp); + + /* printf("A cart point is (%.8f, %.8f, %.8f)\n", cp.x, cp.y, cp.z); */ + + return(cp); +} + + +/* given three points defining a triangle, calculate the normal */ +void calc_normal(fgPoint3d p1, fgPoint3d p2, + fgPoint3d p3, double normal[3]) +{ + double v1[3], v2[3]; + double temp; + + v1[0] = p2.x - p1.x; v1[1] = p2.y - p1.y; v1[2] = p2.z - p1.z; + v2[0] = p3.x - p1.x; v2[1] = p3.y - p1.y; v2[2] = p3.z - p1.z; + + MAT3cross_product(normal, v1, v2); + MAT3_NORMALIZE_VEC(normal, temp); + +/* printf(" Normal = %.2f %.2f %.2f\n", normal[0], normal[1], normal[2]); */ +} + + +/* return the index of all triangles containing the specified node */ +void find_tris(int n, int *t1, int *t2, int *t3, int *t4, int *t5) { + int i; + + *t1 = *t2 = *t3 = *t4 = *t5 = 0; + + i = 1; + while ( i <= tricount ) { + if ( (n == tris[i][0]) || (n == tris[i][1]) || (n == tris[i][2]) ) { + if ( *t1 == 0 ) { + *t1 = i; + } else if ( *t2 == 0 ) { + *t2 = i; + } else if ( *t3 == 0 ) { + *t3 = i; + } else if ( *t4 == 0 ) { + *t4 = i; + } else { + *t5 = i; + } + } + i++; + } +} + + +/* 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); +} + + +/* given a file pointer, read all the vn (normals from it) */ +void read_normals(FILE *fp) { + char line[256]; + + while ( fgets(line, 250, fp) != NULL ) { + if ( strncmp(line, "vn ", 3) == 0 ) { + sscanf( line, "vn %lf %lf %lf\n", + &normals[normalcount][0], + &normals[normalcount][1], + &normals[normalcount][2] ); + /* + printf("read_normals(%d) %.2f %.2f %.2f %s", normalcount, + normals[normalcount][0], normals[normalcount][1], + normals[normalcount][2], line); + */ + normalcount++; + } + } +} + + +/* 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); + } +} + + +/* Initialize a new mesh structure */ +void triload(char *basename, char *basepath) { + char nodename[256], elename[256]; + double n[3]; + FILE *ne, *nw, *se, *sw, *north, *south, *east, *west; + FILE *node, *ele; + int dim, junk1, junk2; + int i; + + ne = my_open(basename, basepath, ".ne"); + read_normals(ne); + fclose(ne); + + nw = my_open(basename, basepath, ".nw"); + read_normals(nw); + fclose(nw); + + se = my_open(basename, basepath, ".se"); + read_normals(se); + fclose(se); + + sw = my_open(basename, basepath, ".sw"); + read_normals(sw); + fclose(sw); + + north = my_open(basename, basepath, ".north"); + read_normals(north); + fclose(north); + + south = my_open(basename, basepath, ".south"); + read_normals(south); + fclose(south); + + east = my_open(basename, basepath, ".east"); + read_normals(east); + fclose(east); + + west = my_open(basename, basepath, ".west"); + read_normals(west); + fclose(west); + + strcpy(nodename, basename); + strcat(nodename, ".node"); + strcpy(elename, basename); + strcat(elename, ".ele"); + + printf("Loading node file: %s ...\n", nodename); + if ( (node = fopen(nodename, "r")) == NULL ) { + printf("Cannot open file '%s'\n", nodename); + exit(-1); + } + + fscanf(node, "%d %d %d %d", &nodecount, &dim, &junk1, &junk2); + + if ( nodecount > MAX_NODES - 1 ) { + printf("Error, too many nodes, need to increase array size\n"); + exit(-1); + } else { + printf(" Expecting %d nodes\n", nodecount); + } + + for ( i = 1; i <= nodecount; i++ ) { + fscanf(node, "%d %lf %lf %lf %d\n", &junk1, + &n[0], &n[1], &n[2], &junk2); + /* printf("%d %.2f %.2f %.2f\n", junk1, n[0], n[1], n[2]); */ + nodes[i] = geod_to_cart(n); + /* printf("%d %.2f %.2f %.2f\n", + junk1, nodes[i].x, nodes[i].y, nodes[i].z); */ + } + + fclose(node); + + printf("Loading element file: %s ...\n", elename); + if ( (ele = fopen(elename, "r")) == NULL ) { + printf("Cannot open file '%s'\n", elename); + exit(-1); + } + + fscanf(ele, "%d %d %d", &tricount, &junk1, &junk2); + + if ( tricount > MAX_TRIS - 1 ) { + printf("Error, too many elements, need to increase array size\n"); + exit(-1); + } else { + printf(" Expecting %d elements\n", tricount); + } + + for ( i = 1; i <= tricount; i++ ) { + fscanf(ele, "%d %d %d %d\n", &junk1, + &tris[i][0], &tris[i][1], &tris[i][2]); + /* printf("%d %d %d %d\n", junk1, tris[i][0], tris[i][1], tris[i][2]);*/ + } + + fclose(ele); +} + + +/* dump in WaveFront .obj format */ +void dump_obj(char *basename) { + char objname[256]; + double n1[3], n2[3], n3[3], n4[3], n5[3], norm[3], temp; + FILE *obj; + int i, t1, t2, t3, t4, t5, count; + + strcpy(objname, basename); + strcat(objname, ".obj"); + + printf("Dumping to file: %s ...\n", objname); + + obj = fopen(objname, "w"); + + /* dump vertices */ + printf(" writing vertices\n"); + for ( i = 1; i <= nodecount; i++ ) { + fprintf(obj, "v %.6f %.6f %.6f\n", + nodes[i].x, nodes[i].y, nodes[i].z); + } + + printf(" calculating and writing normals\n"); + printf(" First %d normals taken from shared files.\n", normalcount); + + /* calculate and generate normals */ + for ( i = 1; i <= nodecount; i++ ) { + + if ( i <= normalcount ) { + /* use precalculated (shared) normal */ + norm[0] = normals[i-1][0]; + norm[1] = normals[i-1][1]; + norm[2] = normals[i-1][2]; + } else { + /* printf("Finding normal\n"); */ + + find_tris(i, &t1, &t2, &t3, &t4, &t5); + + n1[0] = n1[1] = n1[2] = 0.0; + n2[0] = n2[1] = n2[2] = 0.0; + n3[0] = n3[1] = n3[2] = 0.0; + n4[0] = n4[1] = n4[2] = 0.0; + n5[0] = n5[1] = n5[2] = 0.0; + + count = 1; + calc_normal(nodes[tris[t1][0]], nodes[tris[t1][1]], + nodes[tris[t1][2]], n1); + + if ( t2 > 0 ) { + calc_normal(nodes[tris[t2][0]], nodes[tris[t2][1]], + nodes[tris[t2][2]], n2); + count = 2; + } + + if ( t3 > 0 ) { + calc_normal(nodes[tris[t3][0]], nodes[tris[t3][1]], + nodes[tris[t3][2]], n3); + count = 3; + } + + if ( t4 > 0 ) { + calc_normal(nodes[tris[t4][0]], nodes[tris[t4][1]], + nodes[tris[t4][2]], n4); + count = 4; + } + + if ( t5 > 0 ) { + calc_normal(nodes[tris[t5][0]], nodes[tris[t5][1]], + nodes[tris[t5][2]], n5); + count = 5; + } + + /* printf(" norm[2] = %.2f %.2f %.2f\n", n1[2], n2[2], n3[2]); */ + + norm[0] = ( n1[0] + n2[0] + n3[0] + n4[0] + n5[0] ) / (double)count; + norm[1] = ( n1[1] + n2[1] + n3[1] + n4[1] + n5[1] ) / (double)count; + norm[2] = ( n1[2] + n2[2] + n3[2] + n4[2] + n5[2] ) / (double)count; + + /* printf(" count = %d\n", count); */ + /* printf(" Ave. normal = %.4f %.4f %.4f\n", + norm[0], norm[1], norm[2]);*/ + MAT3_NORMALIZE_VEC(norm, temp); + /* printf(" Normalized ave. normal = %.4f %.4f %.4f\n", */ + /* norm[0], norm[1], norm[2]); */ + } + /* printf("%d vn %.4f %.4f %.4f\n", i, norm[0], norm[1], norm[2]); */ + fprintf(obj, "vn %.4f %.4f %.4f\n", norm[0], norm[1], norm[2]); + } + + /* dump faces */ + printf(" writing faces\n"); + for ( i = 1; i <= tricount; i++ ) { + fprintf(obj, "f %d %d %d\n", tris[i][0], tris[i][1], tris[i][2]); + } + + fclose(obj); +} + +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); + + /* load the input data files */ + triload(basename, basepath); + + /* dump in WaveFront .obj format */ + dump_obj(basename); + + return(0); +} + + +/* $Log$ +/* Revision 1.1 1998/07/08 14:54:53 curt +/* renamed *.[ch] to *.[ch]xx +/* + * Revision 1.17 1998/07/04 00:56:40 curt + * typedef'd struct fgBUCKET. + * + * Revision 1.16 1998/05/23 15:20:41 curt + * Output more digits after the decimal place. + * + * Revision 1.15 1998/05/02 01:54:39 curt + * Converting to polar3d.h routines. + * + * Revision 1.14 1998/04/18 04:01:32 curt + * Now use libMath rather than having local copies of math routines. + * + * Revision 1.13 1998/04/14 02:26:11 curt + * Code reorganizations. Added a Lib/ directory for more general libraries. + * + * Revision 1.12 1998/04/08 23:22:18 curt + * Adopted Gnu automake/autoconf system. + * + * Revision 1.11 1998/03/03 16:01:00 curt + * More c++ compile tweaks. + * + * Revision 1.10 1998/01/31 00:41:27 curt + * Made a few changes converting floats to doubles. + * + * Revision 1.9 1998/01/27 18:37:04 curt + * Lots of updates to get back in sync with changes made over in .../Src/ + * + * Revision 1.8 1998/01/17 01:25:39 curt + * Added support for shared normals. + * + * Revision 1.7 1998/01/12 02:42:00 curt + * Average up to five triangles per vertex instead of three. + * + * Revision 1.6 1998/01/09 23:03:15 curt + * Restructured to split 1deg x 1deg dem's into 64 subsections. + * + * Revision 1.5 1997/12/08 19:17:50 curt + * Fixed a type in the normal generation code. + * + * Revision 1.4 1997/12/02 13:13:32 curt + * Fixed problem with averaged vertex normals. + * + * Revision 1.3 1997/11/15 18:05:05 curt + * minor tweaks ... + * + * Revision 1.2 1997/11/14 00:29:13 curt + * Transform scenery coordinates at this point in pipeline when scenery is + * being translated to .obj format, not when it is being loaded into the end + * renderer. Precalculate normals for each node as average of the normals + * of each containing polygon so Garoude shading is now supportable. + * + * Revision 1.1 1997/10/29 23:05:15 curt + * Initial revision. + * + */ diff --git a/Tri2obj/tri2obj.h b/Tri2obj/tri2obj.h deleted file mode 100644 index e53ae1d0d..000000000 --- a/Tri2obj/tri2obj.h +++ /dev/null @@ -1,65 +0,0 @@ -/* tri2obj.h -- read in a .ele/.node file pair generated by the triangle - * program and output a Wavefront .obj file. - * - * Written by Curtis Olson, started October 1997. - * - * 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) - */ - - -#ifndef TRI2OBJ_H -#define TRI2OBJ_H - - -#include -#include - - -#define MAX_NODES 200000 -#define MAX_TRIS 400000 - - -/* Initialize a new mesh structure */ -void triload(char *basename, char *basepath); - - -#endif /* TRI2OBJ_H */ - - -/* $Log$ -/* Revision 1.5 1998/03/03 16:01:00 curt -/* More c++ compile tweaks. -/* - * Revision 1.4 1998/01/17 01:25:40 curt - * Added support for shared normals. - * - * Revision 1.3 1997/11/15 18:05:06 curt - * minor tweaks ... - * - * Revision 1.2 1997/11/14 00:29:13 curt - * Transform scenery coordinates at this point in pipeline when scenery is - * being translated to .obj format, not when it is being loaded into the end - * renderer. Precalculate normals for each node as average of the normals - * of each containing polygon so Garoude shading is now supportable. - * - * Revision 1.1 1997/10/29 23:05:15 curt - * Initial revision. - * - */ diff --git a/Tri2obj/tri2obj.hxx b/Tri2obj/tri2obj.hxx new file mode 100644 index 000000000..c7a54d159 --- /dev/null +++ b/Tri2obj/tri2obj.hxx @@ -0,0 +1,68 @@ +/* tri2obj.h -- read in a .ele/.node file pair generated by the triangle + * program and output a Wavefront .obj file. + * + * Written by Curtis Olson, started October 1997. + * + * 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) + */ + + +#ifndef TRI2OBJ_H +#define TRI2OBJ_H + + +#include +#include + + +#define MAX_NODES 200000 +#define MAX_TRIS 400000 + + +/* Initialize a new mesh structure */ +void triload(char *basename, char *basepath); + + +#endif /* TRI2OBJ_H */ + + +/* $Log$ +/* Revision 1.1 1998/07/08 14:54:54 curt +/* renamed *.[ch] to *.[ch]xx +/* + * Revision 1.5 1998/03/03 16:01:00 curt + * More c++ compile tweaks. + * + * Revision 1.4 1998/01/17 01:25:40 curt + * Added support for shared normals. + * + * Revision 1.3 1997/11/15 18:05:06 curt + * minor tweaks ... + * + * Revision 1.2 1997/11/14 00:29:13 curt + * Transform scenery coordinates at this point in pipeline when scenery is + * being translated to .obj format, not when it is being loaded into the end + * renderer. Precalculate normals for each node as average of the normals + * of each containing polygon so Garoude shading is now supportable. + * + * Revision 1.1 1997/10/29 23:05:15 curt + * Initial revision. + * + */