-/**************************************************************************
- * bucketutils.c -- support routines to handle fgBUCKET operations
- *
- * 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)
- **************************************************************************/
+// bucketutils.c -- support routines to handle fgBUCKET operations
+//
+// 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>
long index = 0;
index = ((p->lon + 180) << 14) + ((p->lat + 90) << 6) + (p->y << 3) + p->x;
- /* printf(" generated index = %ld\n", index); */
+ // printf(" generated index = %ld\n", index);
return(index);
}
-/* Parse a unique scenery tile index and find the lon, lat, x, and y */
+// Parse a unique scenery tile index and find the lon, lat, x, and y
void fgBucketParseIndex(long int index, fgBUCKET *p) {
p->lon = index >> 14;
index -= p->lon << 14;
}
-/* Build a path name from an tile index */
+// Build a path name from an tile index
void fgBucketGenBasePath( const fgBUCKET *p, char *path) {
long int index;
int top_lon, top_lat, main_lon, main_lat;
}
-/* offset an bucket struct by the specified amounts in the X & Y direction */
+// offset an bucket struct by the specified amounts in the X & Y direction
void fgBucketOffset(fgBUCKET *in, fgBUCKET *out, int x, int y) {
int diff, temp;
int dist_lat;
out->x = in->x;
out->y = in->y;
- /* do X direction */
+ // do X direction
diff = out->x + x;
- /* printf(" reducing x (%d)\n", diff); */
+ // printf(" reducing x (%d)\n", diff);
if ( diff >= 0 ) {
temp = diff / 8;
} else if ( diff < -7 ) {
out->x = ((diff % 8) + 8) % 8;
out->lon = ( (out->lon + 180 + 360 + temp) % 360 ) - 180;
- /* do Y direction */
+ // do Y direction
diff = out->y + y;
- /* printf(" reducing x (%d)\n", diff); */
+ // printf(" reducing x (%d)\n", diff);
if ( diff >= 0 ) {
temp = diff / 8;
} else if ( diff < -7 ) {
if ( out->lat >= 90 ) {
dist_lat = out->lat - 90;
- /* printf(" +lat = %d +y = %d\n", dist_lat, out->y); */
+ // printf(" +lat = %d +y = %d\n", dist_lat, out->y);
out->lat = 90 - (dist_lat + 1);
out->lon = ( (out->lon + 180 + 180) % 360 ) - 180;
if ( out->lat < -90 ) {
dist_lat = -90 - out->lat;
- /* printf(" +lat = %d +y = %d\n", dist_lat, out->y); */
+ // printf(" +lat = %d +y = %d\n", dist_lat, out->y);
out->lat = -90 + (dist_lat - 1);
out->lon = ( (out->lon + 180 + 180) % 360 ) - 180;
}
-/* Given a lat/lon in degrees, find the "bucket" or tile that it falls
- within */
+// Given a lat/lon in degrees, find the "bucket" or tile that it falls
+// within
void fgBucketFind(double lon, double lat, fgBUCKET *p) {
double diff;
diff = lon - (double)(int)lon;
- /* printf("diff = %.2f\n", diff); */
+ // printf("diff = %.2f\n", diff);
if ( (lon >= 0) || (fabs(diff) < FG_EPSILON) ) {
p->lon = (int)lon;
} else {
p->lon = (int)lon - 1;
}
- /* printf(" p->lon = %d\n", p->lon); */
+ // printf(" p->lon = %d\n", p->lon);
diff = lat - (double)(int)lat;
- /* printf("diff = %.2f\n", diff); */
+ // printf("diff = %.2f\n", diff);
if ( (lat >= 0) || (fabs(diff) < FG_EPSILON) ) {
p->lat = (int)lat;
} else {
p->lat = (int)lat - 1;
}
- /* printf(" p->lat = %d\n", p->lat); */
+ // printf(" p->lat = %d\n", p->lat);
p->x = (int)((lon - p->lon) * 8);
p->y = (int)((lat - p->lat) * 8);
- /* printf( "Bucket = lon,lat = %d,%d x,y index = %d,%d\n",
- p->lon, p->lat, p->x, p->y); */
+ // printf( "Bucket = lon,lat = %d,%d x,y index = %d,%d\n",
+ // p->lon, p->lat, p->x, p->y);
}
-/* Given a lat/lon, fill in the local tile index array */
+// Given a lat/lon, fill in the local tile index array
void fgBucketGenIdxArray(fgBUCKET *p1, fgBUCKET *tiles, int width, int height) {
fgBUCKET *p2;
int dw, dh, i, j;
} */
-/* $Log$
-/* Revision 1.4 1998/12/07 21:08:01 curt
-/* Added a const in a couple places to get rid of annoying compiler warnings.
-/*
- * Revision 1.3 1998/07/04 00:46:47 curt
- * typedef'd struct fgBUCKET.
- *
- * Revision 1.2 1998/04/25 22:06:22 curt
- * Edited cvs log messages in source files ... bad bad bad!
- *
- * Revision 1.1 1998/04/08 23:28:58 curt
- * Adopted Gnu automake/autoconf system.
- *
- * Revision 1.6 1998/02/09 15:07:51 curt
- * Minor tweaks.
- *
- * Revision 1.5 1998/01/29 00:51:38 curt
- * First pass at tile cache, dynamic tile loading and tile unloading now works.
- *
- * Revision 1.4 1998/01/27 03:26:41 curt
- * Playing with new fgPrintf command.
- *
- * Revision 1.3 1998/01/27 00:48:01 curt
- * Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
- * system and commandline/config file processing code.
- *
- * Revision 1.2 1998/01/24 00:03:28 curt
- * Initial revision.
- *
- * Revision 1.1 1998/01/23 20:06:51 curt
- * tileutils.* renamed to bucketutils.*
- *
- * Revision 1.6 1998/01/19 19:27:18 curt
- * Merged in make system changes from Bob Kuehne <rpk@sgi.com>
- * This should simplify things tremendously.
- *
- * Revision 1.5 1998/01/14 02:19:04 curt
- * Makde offset_bucket visible to outside.
- *
- * Revision 1.4 1998/01/13 00:23:12 curt
- * Initial changes to support loading and management of scenery tiles. Note,
- * there's still a fair amount of work left to be done.
- *
- * Revision 1.3 1998/01/10 00:01:47 curt
- * Misc api changes and tweaks.
- *
- * Revision 1.2 1998/01/08 02:22:28 curt
- * Continue working on basic features.
- *
- * Revision 1.1 1998/01/07 23:50:52 curt
- * "area" renamed to "tile"
- *
- * Revision 1.1 1998/01/07 23:23:40 curt
- * Initial revision.
- *
- * */
+// $Log$
+// Revision 1.5 1998/12/09 18:48:08 curt
+// Use C++ style comments.
+//
+// Revision 1.4 1998/12/07 21:08:01 curt
+// Added a const in a couple places to get rid of annoying compiler warnings.
+//
+// Revision 1.3 1998/07/04 00:46:47 curt
+// typedef'd struct fgBUCKET.
+//
+// Revision 1.2 1998/04/25 22:06:22 curt
+// Edited cvs log messages in source files ... bad bad bad!
+//
+// Revision 1.1 1998/04/08 23:28:58 curt
+// Adopted Gnu automake/autoconf system.
+//
+// Revision 1.6 1998/02/09 15:07:51 curt
+// Minor tweaks.
+//
+// Revision 1.5 1998/01/29 00:51:38 curt
+// First pass at tile cache, dynamic tile loading and tile unloading now works.
+//
+// Revision 1.4 1998/01/27 03:26:41 curt
+// Playing with new fgPrintf command.
+//
+// Revision 1.3 1998/01/27 00:48:01 curt
+// Incorporated Paul Bleisch's <pbleisch@acm.org> new debug message
+// system and commandline/config file processing code.
+//
+// Revision 1.2 1998/01/24 00:03:28 curt
+// Initial revision.
+//
+// Revision 1.1 1998/01/23 20:06:51 curt
+// tileutils.* renamed to bucketutils.*
+//
+// Revision 1.6 1998/01/19 19:27:18 curt
+// Merged in make system changes from Bob Kuehne <rpk@sgi.com>
+// This should simplify things tremendously.
+//
+// Revision 1.5 1998/01/14 02:19:04 curt
+// Makde offset_bucket visible to outside.
+//
+// Revision 1.4 1998/01/13 00:23:12 curt
+// Initial changes to support loading and management of scenery tiles. Note,
+// there's still a fair amount of work left to be done.
+//
+// Revision 1.3 1998/01/10 00:01:47 curt
+// Misc api changes and tweaks.
+//
+// Revision 1.2 1998/01/08 02:22:28 curt
+// Continue working on basic features.
+//
+// Revision 1.1 1998/01/07 23:50:52 curt
+// "area" renamed to "tile"
+//
+// Revision 1.1 1998/01/07 23:23:40 curt
+// Initial revision.
+//
projects / simgear.git / blobdiff