#include <stdio.h>
+#include <stdlib.h> /* for atoi() */
#include <string.h>
+#include <sys/stat.h> /* for stat() */
+#include <unistd.h> /* for stat() */
#include "tri2obj.h"
-#include "../../Src/constants.h"
-#include "../../Src/types.h"
-#include "../../Src/Math/fg_geodesy.h"
-#include "../../Src/Math/mat3.h"
-#include "../../Src/Math/polar.h"
+#include <Include/fg_constants.h>
+#include <Include/fg_types.h>
+#include <Bucket/bucketutils.h>
+
+#include <Math/fg_geodesy.h>
+#include <Math/mat3.h>
+#include <Math/polar3d.h>
int nodecount, tricount;
-struct fgCartesianPoint nodes[MAX_NODES];
-int tris[MAX_TRIS][3];
-int new_tris[MAX_TRIS][3];
+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 */
-struct fgCartesianPoint geod_to_cart(double geod[3]) {
- struct fgCartesianPoint p;
+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",
/* printf("A geocentric point is (%.2f, %.2f, %.2f)\n", gc_lon,
gc_lat, sl_radius+geod[2]); */
- p = fgPolarToCart(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", p.x, p.y, p.z); */
+ /* printf("A cart point is (%.8f, %.8f, %.8f)\n", cp.x, cp.y, cp.z); */
- return(p);
+ return(cp);
}
/* given three points defining a triangle, calculate the normal */
-void calc_normal(struct fgCartesianPoint p1, struct fgCartesianPoint p2,
- struct fgCartesianPoint p3, double normal[3])
+void calc_normal(fgCartesianPoint3d p1, fgCartesianPoint3d p2,
+ fgCartesianPoint3d p3, double normal[3])
{
double v1[3], v2[3];
- float temp;
+ 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);
+ MAT3_NORMALIZE_VEC(normal, temp);
- /* printf("Normal = %.2f %.2f %.2f\n", normal[0], normal[1], normal[2]); */
+/* 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) {
+void find_tris(int n, int *t1, int *t2, int *t3, int *t4, int *t5) {
int i;
- *t1 = *t2 = *t3 = 0;
+ *t1 = *t2 = *t3 = *t4 = *t5 = 0;
i = 1;
while ( i <= tricount ) {
*t1 = i;
} else if ( *t2 == 0 ) {
*t2 = i;
- } else {
+ } 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) {
+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);
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]);
+ /* 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);
+ /* printf("%d %.2f %.2f %.2f\n",
+ junk1, nodes[i].x, nodes[i].y, nodes[i].z); */
}
fclose(node);
/* dump in WaveFront .obj format */
void dump_obj(char *basename) {
char objname[256];
- double n1[3], n2[3], n3[3];
+ double n1[3], n2[3], n3[3], n4[3], n5[3], norm[3], temp;
FILE *obj;
- int i, t1, t2, t3, count;
+ int i, t1, t2, t3, t4, t5, count;
strcpy(objname, basename);
strcat(objname, ".obj");
obj = fopen(objname, "w");
/* dump vertices */
+ printf(" writing vertices\n");
for ( i = 1; i <= nodecount; i++ ) {
- fprintf(obj, "v %.2f %.2f %.2f\n",
+ 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++ ) {
- find_tris(i, &t1, &t2, &t3);
- n1[0] = n1[1] = n1[2] = 0.0;
- n2[0] = n2[1] = n2[2] = 0.0;
- n3[0] = n3[1] = n3[3] = 0.0;
+ 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;
+ }
- count = 1;
- calc_normal(nodes[tris[t1][0]], nodes[tris[t1][1]], nodes[tris[t1][2]],
- n1);
+ if ( t3 > 0 ) {
+ calc_normal(nodes[tris[t3][0]], nodes[tris[t3][1]],
+ nodes[tris[t3][2]], n3);
+ count = 3;
+ }
- if ( t2 > 0 ) {
- calc_normal(nodes[tris[t2][0]], nodes[tris[t2][1]],
- nodes[tris[t2][2]], n2);
- count = 2;
- }
+ if ( t4 > 0 ) {
+ calc_normal(nodes[tris[t4][0]], nodes[tris[t4][1]],
+ nodes[tris[t4][2]], n4);
+ count = 4;
+ }
- if ( t3 > 0 ) {
- calc_normal(nodes[tris[t3][0]], nodes[tris[t3][1]],
- nodes[tris[t3][2]], n3);
- count = 3;
- }
+ if ( t5 > 0 ) {
+ calc_normal(nodes[tris[t5][0]], nodes[tris[t5][1]],
+ nodes[tris[t5][2]], n5);
+ count = 5;
+ }
- fprintf(obj, "vn %.4f %.4f %.4f\n",
- ( n1[0] + n2[0] + n3[0] ) / (double)count,
- ( n1[1] + n2[1] + n3[1] ) / (double)count,
- ( n1[2] + n2[2] + n3[2] ) / (double)count );
+ /* 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//%d %d//%d\n",
- tris[i][0], tris[i][0],
- tris[i][1], tris[i][1],
- tris[i][2], tris[i][2]);
+ 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];
+ 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);
+ triload(basename, basepath);
/* dump in WaveFront .obj format */
dump_obj(basename);
/* $Log$
-/* 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 1.17 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.
*
projects / flightgear.git / blobdiff