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Posts tagged ‘2d’

Using VCK with a transposed arch length method to get rotation about the elbow.

August 2, 2007

Charles

I posted this at cgtalk

Has anyone though of using VCK with a transposed arc length method to get rotations about the elbow? Basically VCK ‘vector coupled ik’ is an ik chain driven by the vector magnitude to positioning the goal whilst having standard rotation for general fk, it basically allows you to break the ik and add nice arcs to the animation – the problem i see with it is you cant drive about the elbow. But what if we use a transposed arch length method, which would ontop drive the general rotation and the magnitude we could get rotation about the elbow- this could even have its own fk controller driving additively over the top i think -you need just a few variables such as bone length, as you drive it as an additive to the main control i.e a layer over the top.

http://adventuresinstorytelling.com/VCK/VCK_poster.pdf

I now must go to bed.

Length of a curve, without walking along it?

July 21, 2007

Charles

Is it possible to get the length of a curve without walking along it,  standard methods essentially split it into chunks and measure there total – the more chunks the better the accuracy. I’ll look into arc length and least square methods.