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Re: Multi point parenting

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Eric Woods
Re: Multi point parenting
on Nov 3, 2009 at 10:50:52 pm

ahh... I think I understand what you are trying to say. Are you trying to get the points themselves to animated, thus changing the shape of the triangle? If that is the case you should be using the puppet tool rather than Nulls alone. If you put a puppet tool pin on the point of each triangle corner, you will be able to animate each point individually and it will change the shape of your triangle. If you are using motion tracking:
Apply the track to a new NULL.
Set an expression for the Pin Point that you would like to be attached to that NULL. ( option click the stopwatch and pick whip to the position attribute of the NULL. )

The point on your triangle should follow the position of the NULL.
**** This technique might result in the lines of your Triangle Bending in either direction. You can fix that by decreasing the amount of triangles in the mesh to as low as possible. If there are any bends in the triangle after that set Stiffness pins to an incredibly high percentage and position them near the bends.

Another work around for this is to use Corner Pin Effect. You can set each of the corners to different tracked Nulls. You can even set two to look at one Null, but you may need to add a -1 or +1 to the end of the expresssion string of one of your Corner Pins. Otherwise you may get wierd results.

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