kOS-scripts/lib/target.ks

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@LAZYGLOBAL off.
run once "lib/node".
function target_ship {
//
// Return the target vessel even though a docking port might have been selected as the target.
//
if TARGET:istype("Part") { // e.g. if selected docking port as target
return TARGET:ship.
}
return TARGET.
}
function relative_velocity {
//
// Return the relative orbital velocity between the ship and our target in the target's inertial frame of reference.
//
if not HASTARGET {
return V(0,0,0). // avoids 'has no target' errors upon docking
}
return SHIP:velocity:orbit - target_ship():velocity:orbit.
}
function kill_relative_velocity {
//
// Kill relative velocity to target if it is above tolerance.
//
parameter tolerance is 0.1.
if relative_velocity():mag < tolerance {
print "Relative velocity within tolerance of " + tolerance + " m/s".
return.
}
execute_burn(-relative_velocity()).
}