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Remove side-slip (aka beta) from the heading offset of the target aircraft.

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This is already accounted for in the true heading of the aircraft.
This commit is contained in:
curt 2006-07-27 02:25:58 +00:00
parent f31088070c
commit f9badcf329
1 changed files with 15 additions and 1 deletions
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16
src/AIModel/AIBase.cxx
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@ -30,6 +30,7 @@
#include <plib/ssg.h>
#include <simgear/math/point3d.hxx>
#include <simgear/math/polar3d.hxx>
#include <simgear/math/sg_geodesy.hxx>
#include <simgear/misc/sg_path.hxx>
#include <simgear/scene/model/location.hxx>
@ -312,6 +313,19 @@ double FGAIBase::UpdateRadar(FGAIManager* manager)
}
}
// This is an alternate way to compute bearing and distance which
// agrees with the original scheme within about 0.1 degrees.
//
// Point3D start( user_longitude * SGD_DEGREES_TO_RADIANS,
// user_latitude * SGD_DEGREES_TO_RADIANS, 0 );
// Point3D dest( pos.getLongitudeRad(), pos.getLatitudeRad(), 0 );
// double gc_bearing, gc_range;
// calc_gc_course_dist( start, dest, &gc_bearing, &gc_range );
// gc_range *= SG_METER_TO_NM;
// gc_bearing *= SGD_RADIANS_TO_DEGREES;
// printf("orig b = %.3f %.2f gc b= %.3f, %.2f\n",
// bearing, range, gc_bearing, gc_range);
// calculate look left/right to target, without yaw correction
horiz_offset = bearing - user_heading;
if (horiz_offset > 180.0) horiz_offset -= 360.0;
@ -335,7 +349,7 @@ double FGAIBase::UpdateRadar(FGAIManager* manager)
*/
// now correct look left/right for yaw
horiz_offset += user_yaw;
// horiz_offset += user_yaw; // FIXME: WHY WOULD WE WANT TO ADD IN SIDE-SLIP HERE?
// calculate values for radar display
y_shift = range * cos( horiz_offset * SG_DEGREES_TO_RADIANS);