View Full Version : rotate to direction

09 September 2010, 09:17 PM
Hey guys,

I was wondering if there was a way to make an object rotate into the direction its moving like a you can do with particle flow (rotate speed space follow)

is there an animation controller type that can do this for single objects or maybe another solution that can accomplish this.

09 September 2010, 03:38 AM
I am not sure how to do this, if you use an spline to animate you can choose to follow the curvature of the path.

Another way is after you create the animation you clone the animation to another dummy object. And then you offset it slightly ahead of your object, after that you can choose to use a lookAt controller for rotation (if i remember the name correctly ) that points to the dummy ahead.

09 September 2010, 03:47 AM
You could sample the position of the object at 2 places in time (current frame and previous frame), then create a vector between those points and set the object's "dir" property to = that vector.

I'm sure you could wire this up into a script controller or something so it's all automated, but here's a simple demonstration:

---Create some positional keyframes on an object, select it, and run this script

for q in 0 to 100 do
slidertime = q
p1 = $.pos
at time (q-1) (p2 = $.pos)

v1 = p1 - p2

$.dir = v1
sleep .025


09 September 2010, 02:39 PM
very nice script Tyson, by the way i have seen your building generator and i love it.

09 September 2010, 02:50 PM
the script doesnt really work for me but maybe Im doing something wrong here :(

09 September 2010, 04:52 PM

Open the Utilities tab, click on More..., select Follow/Bank utility.
It has been around since probably Max 2 or even earlier, and I have never used it...

09 September 2010, 04:54 PM
I don't believe it !!! Yes it is there ...

09 September 2010, 08:23 PM
awesome bobo!

I would have liked it more as a animation controller for the rotation but this certainly does the trick for now.

A position animation controller that would move the object into the direction that its pointing toward would also be awesome. especially combined with a lookat controller.

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09 September 2010, 08:23 PM
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