--- /dev/null
+libdir = ${exec_prefix}/lib
+
+lib_LTLIBRARIES = libBucket.la
+
+libBucket_la_SOURCES = bucketutils.c bucketutils.h
+
+INCLUDES += -I../..
--- /dev/null
+# Makefile.in generated automatically by automake 1.2h from Makefile.am
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
+
+SHELL = /bin/sh
+
+srcdir = @srcdir@
+top_srcdir = @top_srcdir@
+VPATH = @srcdir@
+prefix = @prefix@
+exec_prefix = @exec_prefix@
+
+bindir = @bindir@
+sbindir = @sbindir@
+libexecdir = @libexecdir@
+datadir = @datadir@
+sysconfdir = @sysconfdir@
+sharedstatedir = @sharedstatedir@
+localstatedir = @localstatedir@
+infodir = @infodir@
+mandir = @mandir@
+includedir = @includedir@
+oldincludedir = /usr/include
+
+DISTDIR =
+
+pkgdatadir = $(datadir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+
+top_builddir = ../../..
+
+ACLOCAL = @ACLOCAL@
+AUTOCONF = @AUTOCONF@
+AUTOMAKE = @AUTOMAKE@
+AUTOHEADER = @AUTOHEADER@
+
+INSTALL = @INSTALL@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+transform = @program_transform_name@
+
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+host_alias = @host_alias@
+host_triplet = @host@
+CC = @CC@
+CXX = @CXX@
+LD = @LD@
+LIBTOOL = @LIBTOOL@
+LN_S = @LN_S@
+MAINT = @MAINT@
+MAKEINFO = @MAKEINFO@
+NM = @NM@
+PACKAGE = @PACKAGE@
+RANLIB = @RANLIB@
+VERSION = @VERSION@
+
+libdir = ${exec_prefix}/lib
+
+lib_LTLIBRARIES = libBucket.la
+
+libBucket_la_SOURCES = bucketutils.c bucketutils.h
+mkinstalldirs = $(SHELL) $(top_srcdir)/mkinstalldirs
+CONFIG_HEADER = ../../../Simulator/Include/config.h
+CONFIG_CLEAN_FILES =
+LTLIBRARIES = $(lib_LTLIBRARIES)
+
+
+DEFS = @DEFS@ -I. -I$(srcdir) -I../../../Simulator/Include
+CPPFLAGS = @CPPFLAGS@
+LDFLAGS = @LDFLAGS@
+LIBS = @LIBS@
+X_CFLAGS = @X_CFLAGS@
+X_LIBS = @X_LIBS@
+X_EXTRA_LIBS = @X_EXTRA_LIBS@
+X_PRE_LIBS = @X_PRE_LIBS@
+libBucket_la_LDFLAGS =
+libBucket_la_LIBADD =
+libBucket_la_OBJECTS = bucketutils.lo
+CFLAGS = @CFLAGS@
+COMPILE = $(CC) $(DEFS) $(INCLUDES) $(CPPFLAGS) $(CFLAGS)
+LTCOMPILE = $(LIBTOOL) --mode=compile $(CC) $(DEFS) $(INCLUDES) $(CPPFLAGS) $(CFLAGS)
+LINK = $(LIBTOOL) --mode=link $(CC) $(CFLAGS) $(LDFLAGS) -o $@
+DIST_COMMON = Makefile.am Makefile.in
+
+
+DISTFILES = $(DIST_COMMON) $(SOURCES) $(HEADERS) $(TEXINFOS) $(EXTRA_DIST)
+
+TAR = tar
+GZIP = --best
+DEP_FILES = .deps/bucketutils.P
+SOURCES = $(libBucket_la_SOURCES)
+OBJECTS = $(libBucket_la_OBJECTS)
+
+all: Makefile $(LTLIBRARIES)
+
+.SUFFIXES:
+.SUFFIXES: .S .c .lo .o .s
+$(srcdir)/Makefile.in: @MAINT@ Makefile.am $(top_srcdir)/configure.in $(ACLOCAL_M4)
+ cd $(top_srcdir) && $(AUTOMAKE) --gnu Simulator/Scenery/Bucket/Makefile
+
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status $(BUILT_SOURCES)
+ cd $(top_builddir) \
+ && CONFIG_FILES=$(subdir)/$@ CONFIG_HEADERS= $(SHELL) ./config.status
+
+
+mostlyclean-libLTLIBRARIES:
+
+clean-libLTLIBRARIES:
+ -test -z "$(lib_LTLIBRARIES)" || rm -f $(lib_LTLIBRARIES)
+
+distclean-libLTLIBRARIES:
+
+maintainer-clean-libLTLIBRARIES:
+
+install-libLTLIBRARIES: $(lib_LTLIBRARIES)
+ @$(NORMAL_INSTALL)
+ $(mkinstalldirs) $(DESTDIR)$(libdir)
+ @list='$(lib_LTLIBRARIES)'; for p in $$list; do \
+ if test -f $$p; then \
+ echo "$(LIBTOOL) --mode=install $(INSTALL_DATA) $$p $(DESTDIR)$(libdir)/$$p"; \
+ $(LIBTOOL) --mode=install $(INSTALL_DATA) $$p $(DESTDIR)$(libdir)/$$p; \
+ else :; fi; \
+ done
+
+uninstall-libLTLIBRARIES:
+ @$(NORMAL_UNINSTALL)
+ list='$(lib_LTLIBRARIES)'; for p in $$list; do \
+ $(LIBTOOL) --mode=uninstall rm -f $(DESTDIR)$(libdir)/$$p; \
+ done
+
+.s.o:
+ $(COMPILE) -c $<
+
+.S.o:
+ $(COMPILE) -c $<
+
+mostlyclean-compile:
+ -rm -f *.o core *.core
+
+clean-compile:
+
+distclean-compile:
+ -rm -f *.tab.c
+
+maintainer-clean-compile:
+
+.s.lo:
+ $(LIBTOOL) --mode=compile $(COMPILE) -c $<
+
+.S.lo:
+ $(LIBTOOL) --mode=compile $(COMPILE) -c $<
+
+mostlyclean-libtool:
+ -rm -f *.lo
+
+clean-libtool:
+ -rm -rf .libs _libs
+
+distclean-libtool:
+
+maintainer-clean-libtool:
+
+libBucket.la: $(libBucket_la_OBJECTS) $(libBucket_la_DEPENDENCIES)
+ $(LINK) -rpath $(libdir) $(libBucket_la_LDFLAGS) $(libBucket_la_OBJECTS) $(libBucket_la_LIBADD) $(LIBS)
+
+tags: TAGS
+
+ID: $(HEADERS) $(SOURCES) $(LISP)
+ here=`pwd` && cd $(srcdir) \
+ && mkid -f$$here/ID $(SOURCES) $(HEADERS) $(LISP)
+
+TAGS: $(HEADERS) $(SOURCES) $(TAGS_DEPENDENCIES) $(LISP)
+ tags=; \
+ here=`pwd`; \
+ list='$(SOURCES) $(HEADERS)'; \
+ unique=`for i in $$list; do echo $$i; done | \
+ awk ' { files[$$0] = 1; } \
+ END { for (i in files) print i; }'`; \
+ test -z "$(ETAGS_ARGS)$$unique$(LISP)$$tags" \
+ || (cd $(srcdir) && etags $(ETAGS_ARGS) $$tags $$unique $(LISP) -o $$here/TAGS)
+
+mostlyclean-tags:
+
+clean-tags:
+
+distclean-tags:
+ -rm -f TAGS ID
+
+maintainer-clean-tags:
+
+distdir = $(top_builddir)/$(PACKAGE)-$(VERSION)/$(subdir)
+
+subdir = Simulator/Scenery/Bucket
+
+distdir: $(DISTFILES)
+ here=`cd $(top_builddir) && pwd`; \
+ top_distdir=`cd $(top_distdir) && pwd`; \
+ distdir=`cd $(distdir) && pwd`; \
+ cd $(top_srcdir) \
+ && $(AUTOMAKE) --include-deps --build-dir=$$here --srcdir-name=$(top_srcdir) --output-dir=$$top_distdir --gnu Simulator/Scenery/Bucket/Makefile
+ @for file in $(DISTFILES); do \
+ d=$(srcdir); \
+ test -f $(distdir)/$$file \
+ || ln $$d/$$file $(distdir)/$$file 2> /dev/null \
+ || cp -p $$d/$$file $(distdir)/$$file; \
+ done
+
+DEPS_MAGIC := $(shell mkdir .deps > /dev/null 2>&1 || :)
+
+-include $(DEP_FILES)
+
+mostlyclean-depend:
+
+clean-depend:
+
+distclean-depend:
+
+maintainer-clean-depend:
+ -rm -rf .deps
+
+%.o: %.c
+ @echo '$(COMPILE) -c $<'; \
+ $(COMPILE) -Wp,-MD,.deps/$(*F).P -c $<
+
+%.lo: %.c
+ @echo '$(LTCOMPILE) -c $<'; \
+ $(LTCOMPILE) -Wp,-MD,.deps/$(*F).p -c $<
+ @-sed -e 's/^\([^:]*\)\.o:/\1.lo \1.o:/' \
+ < .deps/$(*F).p > .deps/$(*F).P
+ @-rm -f .deps/$(*F).p
+info:
+dvi:
+check: all
+ $(MAKE)
+installcheck:
+install-exec: install-libLTLIBRARIES
+ @$(NORMAL_INSTALL)
+
+install-data:
+ @$(NORMAL_INSTALL)
+
+install: install-exec install-data all
+ @:
+
+uninstall: uninstall-libLTLIBRARIES
+
+install-strip:
+ $(MAKE) INSTALL_PROGRAM='$(INSTALL_PROGRAM) -s' INSTALL_SCRIPT='$(INSTALL_PROGRAM)' install
+installdirs:
+ $(mkinstalldirs) $(DATADIR)$(libdir)
+
+
+mostlyclean-generic:
+ -test -z "$(MOSTLYCLEANFILES)" || rm -f $(MOSTLYCLEANFILES)
+
+clean-generic:
+ -test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+ -rm -f Makefile $(DISTCLEANFILES)
+ -rm -f config.cache config.log stamp-h stamp-h[0-9]*
+ -test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+
+maintainer-clean-generic:
+ -test -z "$(MAINTAINERCLEANFILES)" || rm -f $(MAINTAINERCLEANFILES)
+ -test -z "$(BUILT_SOURCES)" || rm -f $(BUILT_SOURCES)
+mostlyclean: mostlyclean-libLTLIBRARIES mostlyclean-compile \
+ mostlyclean-libtool mostlyclean-tags mostlyclean-depend \
+ mostlyclean-generic
+
+clean: clean-libLTLIBRARIES clean-compile clean-libtool clean-tags \
+ clean-depend clean-generic mostlyclean
+
+distclean: distclean-libLTLIBRARIES distclean-compile distclean-libtool \
+ distclean-tags distclean-depend distclean-generic clean
+ -rm -f config.status
+ -rm -f libtool
+
+maintainer-clean: maintainer-clean-libLTLIBRARIES \
+ maintainer-clean-compile maintainer-clean-libtool \
+ maintainer-clean-tags maintainer-clean-depend \
+ maintainer-clean-generic distclean
+ @echo "This command is intended for maintainers to use;"
+ @echo "it deletes files that may require special tools to rebuild."
+
+.PHONY: mostlyclean-libLTLIBRARIES distclean-libLTLIBRARIES \
+clean-libLTLIBRARIES maintainer-clean-libLTLIBRARIES \
+uninstall-libLTLIBRARIES install-libLTLIBRARIES mostlyclean-compile \
+distclean-compile clean-compile maintainer-clean-compile \
+mostlyclean-libtool distclean-libtool clean-libtool \
+maintainer-clean-libtool tags mostlyclean-tags distclean-tags \
+clean-tags maintainer-clean-tags distdir mostlyclean-depend \
+distclean-depend clean-depend maintainer-clean-depend info dvi \
+installcheck install-exec install-data install uninstall all \
+installdirs mostlyclean-generic distclean-generic clean-generic \
+maintainer-clean-generic clean mostlyclean distclean maintainer-clean
+
+
+INCLUDES += -I../..
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
--- /dev/null
+/**************************************************************************
+ * 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>
+#include <stdio.h>
+
+#include <Include/fg_constants.h>
+
+#include "bucketutils.h"
+
+
+/* Generate the unique scenery tile index containing the specified
+ lon/lat parameters.
+
+ The index is constructed as follows:
+
+ 9 bits - to represent 360 degrees of longitude (-180 to 179)
+ 8 bits - to represent 180 degrees of latitude (-90 to 89)
+
+ Each 1 degree by 1 degree tile is further broken down into an 8x8
+ grid. So we also need:
+
+ 3 bits - to represent x (0 to 7)
+ 3 bits - to represent y (0 to 7) */
+long int fgBucketGenIndex(struct fgBUCKET *p) {
+ long index = 0;
+
+ index = ((p->lon + 180) << 14) + ((p->lat + 90) << 6) + (p->y << 3) + p->x;
+ /* printf(" generated index = %ld\n", index); */
+
+ return(index);
+}
+
+
+/* Parse a unique scenery tile index and find the lon, lat, x, and y */
+void fgBucketParseIndex(long int index, struct fgBUCKET *p) {
+ p->lon = index >> 14;
+ index -= p->lon << 14;
+ p->lon -= 180;
+
+ p->lat = index >> 6;
+ index -= p->lat << 6;
+ p->lat -= 90;
+
+ p->y = index >> 3;
+ index -= p->y << 3;
+
+ p->x = index;
+}
+
+
+/* Build a path name from an tile index */
+void fgBucketGenBasePath(struct fgBUCKET *p, char *path) {
+ long int index;
+ int top_lon, top_lat, main_lon, main_lat;
+ char hem, pole;
+
+ index = fgBucketGenIndex(p);
+
+ path[0] = '\0';
+
+ top_lon = p->lon / 10;
+ main_lon = p->lon;
+ if ( (p->lon < 0) && (top_lon * 10 != p->lon) ) {
+ top_lon -= 1;
+ }
+ top_lon *= 10;
+ if ( top_lon >= 0 ) {
+ hem = 'e';
+ } else {
+ hem = 'w';
+ top_lon *= -1;
+ }
+ if ( main_lon < 0 ) {
+ main_lon *= -1;
+ }
+
+ top_lat = p->lat / 10;
+ main_lat = p->lat;
+ if ( (p->lat < 0) && (top_lat * 10 != p->lat) ) {
+ top_lat -= 1;
+ }
+ top_lat *= 10;
+ if ( top_lat >= 0 ) {
+ pole = 'n';
+ } else {
+ pole = 's';
+ top_lat *= -1;
+ }
+ if ( main_lat < 0 ) {
+ main_lat *= -1;
+ }
+
+ sprintf(path, "%c%03d%c%03d/%c%03d%c%03d",
+ hem, top_lon, pole, top_lat,
+ hem, main_lon, pole, main_lat);
+}
+
+
+/* offset an bucket struct by the specified amounts in the X & Y direction */
+void fgBucketOffset(struct fgBUCKET *in, struct fgBUCKET *out, int x, int y) {
+ int diff, temp;
+ int dist_lat;
+
+ out->lon = in->lon;
+ out->lat = in->lat;
+ out->x = in->x;
+ out->y = in->y;
+
+ /* do X direction */
+ diff = out->x + x;
+ /* printf(" reducing x (%d)\n", diff); */
+ if ( diff >= 0 ) {
+ temp = diff / 8;
+ } else if ( diff < -7 ) {
+ temp = (diff + 1) / 8 - 1;
+ } else {
+ temp = diff / 8 - 1;
+ }
+ out->x = ((diff % 8) + 8) % 8;
+ out->lon = ( (out->lon + 180 + 360 + temp) % 360 ) - 180;
+
+ /* do Y direction */
+ diff = out->y + y;
+ /* printf(" reducing x (%d)\n", diff); */
+ if ( diff >= 0 ) {
+ temp = diff / 8;
+ } else if ( diff < -7 ) {
+ temp = (diff + 1) / 8 - 1;
+ } else {
+ temp = diff / 8 - 1;
+ }
+ out->y = ((diff % 8) + 8) % 8;
+ out->lat = out->lat + temp;
+
+ if ( out->lat >= 90 ) {
+ dist_lat = out->lat - 90;
+ /* printf(" +lat = %d +y = %d\n", dist_lat, out->y); */
+
+ out->lat = 90 - (dist_lat + 1);
+ out->lon = ( (out->lon + 180 + 180) % 360 ) - 180;
+ out->y = 7 - out->y;
+ }
+
+ if ( out->lat < -90 ) {
+ dist_lat = -90 - out->lat;
+ /* printf(" +lat = %d +y = %d\n", dist_lat, out->y); */
+
+ out->lat = -90 + (dist_lat - 1);
+ out->lon = ( (out->lon + 180 + 180) % 360 ) - 180;
+ out->y = 7 - out->y;
+ }
+}
+
+
+/* Given a lat/lon, find the "bucket" or tile that it falls within */
+void fgBucketFind(double lon, double lat, struct fgBUCKET *p) {
+ double diff;
+
+ diff = lon - (double)(int)lon;
+ /* 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); */
+
+ diff = lat - (double)(int)lat;
+ /* 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); */
+
+ 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); */
+}
+
+
+/* Given a lat/lon, fill in the local tile index array */
+void fgBucketGenIdxArray(struct fgBUCKET *p1, struct fgBUCKET *tiles,
+ int width, int height) {
+ struct fgBUCKET *p2;
+ int dw, dh, i, j;
+
+ dh = height / 2;
+ dw = width / 2;
+ for ( j = 0; j < height; j++ ) {
+ for ( i = 0; i < width; i++ ) {
+ fgBucketOffset(p1, &tiles[(j*width)+i], i - dw, j - dh);
+ p2 = &tiles[(j*width)+i];
+ /* printf( " bucket = %d %d %d %d index = %ld\n",
+ p2->lon, p2->lat, p2->x, p2->y,
+ fgBucketGenIndex(&tiles[(j*width)+i])); */
+ }
+ }
+}
+
+
+/* sample main for testing
+int main() {
+ struct fgBUCKET p1;
+ long int tile[49];
+ char path[256];
+ double lon, lat;
+ int i, j;
+
+ p1.lon = 180;
+ p1.lat = 90;
+ p1.x = 7;
+ p1.y = 7;
+
+ printf("Max index = %ld\n", gen_index(&p1));
+
+ lon = -50.0;
+ lat = -50.0;
+ find_bucket(lon, lat, &p1);
+ gen_idx_array(&p1, tile, 7, 7);
+ for ( j = 0; j < 7; j++ ) {
+ for ( i = 0; i < 7; i++ ) {
+ gen_path(tile[(j*7)+i], path);
+ printf(" path = %s\n", path);
+ }
+ }
+
+ lon = 50.0;
+ lat = 50.0;
+ find_bucket(lon, lat, &p1);
+ gen_idx_array(&p1, tile, 7, 7);
+ for ( j = 0; j < 7; j++ ) {
+ for ( i = 0; i < 7; i++ ) {
+ gen_path(tile[(j*7)+i], path);
+ printf(" path = %s\n", path);
+ }
+ }
+
+ return(1);
+} */
+
+
+/* $Log$
+/* 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 <bleisch@chromatic.com> 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.
+ *
+ * */
+
+
--- /dev/null
+/**************************************************************************
+ * bucketutils.h -- 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)
+ **************************************************************************/
+
+
+#ifndef _BUCKETUTILS_H
+#define _BUCKETUTILS_H
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+struct fgBUCKET {
+ int lon; /* longitude (-180 to 179) */
+ int lat; /* latitude (-90 to 89) */
+ int x; /* x (0 to 7) */
+ int y; /* y (0 to 7) */
+};
+
+
+/* Generate the unique scenery tile index containing the specified
+ lon/lat parameters.
+
+ The index is constructed as follows:
+
+ 9 bits - to represent 360 degrees of longitude (-180 to 179)
+ 8 bits - to represent 180 degrees of latitude (-90 to 89)
+
+ Each 1 degree by 1 degree tile is further broken down into an 8x8
+ grid. So we also need:
+
+ 3 bits - to represent x (0 to 7)
+ 3 bits - to represent y (0 to 7) */
+long int fgBucketGenIndex(struct fgBUCKET *p);
+
+
+/* Parse a unique scenery tile index and find the lon, lat, x, and y */
+void fgBucketParseIndex(long int index, struct fgBUCKET *p);
+
+
+/* Build a path name from an tile index */
+void fgBucketGenBasePath(struct fgBUCKET *p, char *path);
+
+
+/* offset an bucket struct by the specified amounts in the X & Y direction */
+void fgBucketOffset(struct fgBUCKET *in, struct fgBUCKET *out, int x, int y);
+
+
+/* Given a lat/lon, find the "bucket" or tile that it falls within */
+void fgBucketFind(double lon, double lat, struct fgBUCKET *p);
+
+
+/* Given a lat/lon, fill in the local tile index array */
+void fgBucketGenIdxArray(struct fgBUCKET *p1, struct fgBUCKET *tiles,
+ int width, int height);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* _BUCKETUTILS_H */
+
+
+/* $Log$
+/* Revision 1.1 1998/04/08 23:28:59 curt
+/* Adopted Gnu automake/autoconf system.
+/*
+ * Revision 1.2 1998/01/24 00:03:28 curt
+ * Initial revision.
+ *
+ * Revision 1.1 1998/01/23 20:06:52 curt
+ * tileutils.* renamed to bucketutils.*
+ *
+ * Revision 1.6 1998/01/22 02:59:42 curt
+ * Changed #ifdef FILE_H to #ifdef _FILE_H
+ *
+ * Revision 1.5 1998/01/14 02:19:05 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 00:01:48 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 / commitdiff