How to control an animation by touch position along a path?

Question

I have a gameobject that I want to animate along a specific path/curve but the animation should be controlled by mouse/touch position. So when I touch/click on the gameobject and move the finger/mouse on the path (or maybe its easier to just move down) the gameobject should follow the defined path. I like iTween, but I think it is not possible to find a solution using it here, right?

thnx!

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Answer 1

Answer by Sajidfarooq · Aug 19, 2013 at 08:41 AM

If it is made of multiple small line segments, then this is how you would do it:

T = location of touch/tap.

Iterate through each line segment.
Find the closest point on each line segment to P.
From all the closest-points, choose the one that is closest to T. Lets call it CP.
Place your object at CP.

If you are using a mathematical curve, then you can find the closest point mathematically. The method will depend on the curve.

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Sajidfarooq · Aug 23, 2013 at 06:10 PM 0

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How to control an animation by touch position along a path?

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