point sop, $RESTX, $RESTY,$RESTZ trick ?

[carthick]

At the end of Bullet Master class, jeff mentions the "age old trick" of using $RESTX, $RESTY, $RESTZ on a point sop.

i did a test with a box > xform (scaled big) -> mountain SOP -> point ( with $restx. $resty, $restz) ( similar to the bullet masterclass )

in the master class presentation, after the point sop, the box seem to back to the original dimention.. in my test.. it has collapsed to one point.

what am i missing here ?

thanks in advance

[graham]

Does your geometry actually have a rest attribute on it?

[tmdag]

I can only guess that you haven't created rest position attribute and when you forced your point position to use not existing attribute - it collapsed to (0,0,0)

[carthick]

i did not create a rest position.

can i ask, what does this 'trick' do ? what is the idea of scaling the object and scaling it back down ?

[A. Morales]

Hi Carthick,

Basically you're able to create wood type splinters with the scale trick, ur stretching it before hand but then applying the original rest position of the points back onto the stretched voronoi pieces, u end up with splinters.

without scalling its also a good way to create more edge detailed voronoi pieces, but at the cost of more highly dense pieces and sometimes not entirely accurate pieces (tweak the noise to get the best result)

I attached a file below, hopefully it helps

pointsop_vornoi_detail.hipnc

Edited November 4, 2013 by amorales