Time based movement

[Asher Dunn <asher at fireyesoftware dot com>]

In my game Eclise, the turning code looks like this:

if shouldTurnLeft then
        curTurn = curTurn + turnRate
elseif shouldTurnRight
        curTurn = curTurn - turnRate
else
	curTurn = curTurn - (turnRate * sign(curTurn))     //move curTurn 
towards 0
end if

ship.turn(curTurn)

This makes the turning nice and smooth, because you don't move directly 
from stopped to full turn.
I want to make this time based, not frame based.

My question is, should it be:
curTurn = curTurn + turnRate * dt

or
ship.turn(curTurn *dt)

or does it not make a difference?

Asher Dunn
--------------------------------------------------------
President and Head Developer of Fireye Software 
<http://www.fireyesoftware.com/>
Make PDFs from your RB app 
<http://www.fireyesoftware.com/code/pdfclasses/>
AIM and Yahoo: fireye7517
REALbasic 5.5.3 Mac OS X 10.3.5

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