Calculating the Heading between 2 points

[Cloughy 0]

Would the following formula work in an Arma script, i noticed commas in the extression.

_dir =mod(atan2(sin(_lon2-_lon1)*cos(_lat2),cos(_lat1)*sin(_lat2)-sin(_lat1)*cos(_lat2)*cos(_lon

2-_lon1)),2*pi)

I want to calculate the direction needed from point1 (units loc) and point2 (target.)

I need the dir for the setDir command cause i want unit to face the target, cause im using the carmover script.

Cheers

GC

[Lolsav 0]

Do you really need it to be scripted? You can get the same effect with the command lookAT

[fasad 1]

Trig surely

<table border="0" align="center" width="95%" cellpadding="0" cellspacing="0"><tr><td>Code Sample </td></tr><tr><td id="CODE">angle = atan deltaX/deltaY

or this (better, since no chance of /0 error)

<table border="0" align="center" width="95%" cellpadding="0" cellspacing="0"><tr><td>Code Sample </td></tr><tr><td id="CODE">angle = deltaX atan2 deltaY

where deltaX = difference in x pos of points, deltaY = difference in y pos of points.

[Cloughy 0]

I don’t think the LookAt command will work. Its used in a script, that projects the vehicle in the dir its looking. Good for boats and Cars driving into road blocks. Fasad, would the command you provided me with, give me the direction I require?

Cheers

GC

[Blanco 0]

Try this

<table border="0" align="center" width="95%" cellpadding="0" cellspacing="0"><tr><td>Code Sample </td></tr><tr><td id="CODE">

_loon1 = _this select 0

_loon2 = _this select 1

_hdg = ((getpos _loon1 Select 0) - (getpos _loon2 Select 0)) ATan2 ((getpos _loon1 Select 1) - (getpos _loon2 Select 1))

?_hdg < 0: _hdg = _hdg + 360

?_hdg > 360: _hdg = _hdg - 360

~.1

hint format ["hdg: %1",_hdg]

[fasad 1]

blanco's code will (probably - I just got up! give the heading from _loon2 to _loon1. Use _loon2 - _loon1 for the opposite bearing.

Have you tried using doWatch?

[mr.peanut 1]

Change:

<table border="0" align="center" width="95%" cellpadding="0" cellspacing="0"><tr><td>Code Sample </td></tr><tr><td id="CODE">?_hdg < 0: _hdg = _hdg + 360

?_hdg > 360: _hdg = _hdg - 360

to

<table border="0" align="center" width="95%" cellpadding="0" cellspacing="0"><tr><td>Code Sample </td></tr><tr><td id="CODE">(_hdg + 360) mod 360

[Cloughy 0]

Thanks, I will give it a try at lunch on my laptop, in work at the mo.

Cheers

GC

[Cloughy 0]

Got it working.

Cheers

GC