FGFS-4.1/simgear
3
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Added a routine to calculate the offset in bucket units between two buckets.

Browse Source
This commit is contained in:
curt
1999-02-11 01:09:33 +00:00
parent 236a1f2a2d
commit 505de4703b
2 changed files with 84 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Bucket/newbucket.cxx
+49
View File
@@ -24,6 +24,11 @@
**************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "newbucket.hxx"
@@ -99,7 +104,51 @@ FGBucket fgBucketOffset( double dlon, double dlat, int dx, int dy ) {
}
// calculate the offset between two buckets
void fgBucketDiff( const FGBucket& b1, const FGBucket& b2, int *dx, int *dy ) {
// Latitude difference
double c1_lat = b1.get_center_lat();
double c2_lat = b2.get_center_lat();
double diff_lat = c2_lat - c1_lat;
#ifdef HAVE_RINT
*dy = (int)rint( diff_lat / FG_BUCKET_SPAN );
#else
if ( diff_lat > 0 ) {
*dy = (int)( diff_lat / FG_BUCKET_SPAN + 0.5 );
} else {
*dy = (int)( diff_lat / FG_BUCKET_SPAN - 0.5 );
}
#endif
// longitude difference
double c1_lon = b1.get_center_lon();
double c2_lon = b2.get_center_lon();
double diff_lon = c2_lon - c1_lon;
double span;
if ( bucket_span(c1_lat) <= bucket_span(c2_lat) ) {
span = bucket_span(c1_lat);
} else {
span = bucket_span(c2_lat);
}
#ifdef HAVE_RINT
*dx = (int)rint( diff_lon / span );
#else
if ( diff_lon > 0 ) {
*dx = (int)( diff_lon / span + 0.5 );
} else {
*dx = (int)( diff_lon / span - 0.5 );
}
#endif
}
// $Log$
// Revision 1.2 1999/02/11 01:09:33 curt
// Added a routine to calculate the offset in bucket units between two buckets.
//
// Revision 1.1 1999/02/08 23:52:16 curt
// Added a new "newbucket.[ch]xx" FGBucket class to replace the old
// fgBUCKET struct and C routines. This FGBucket class adjusts the tile