Hi All,
Grey matter failure, does anyone happen to know the simple trick to to get the maximum bound that a box sop will generate when taking the input of an object over a frame range. Its one of things I have forgotten how to. I do have a chops solution but is slow and cumbersome to implement , I seem to remember it used a trail sop …

Rob

Hi,

Do you mean for the local bb? Not sure if you need it with a box with 4 polygons or a box with any number of divisions, but you can use one of the corners to construct a matrix and then transform it back using the difference.

This Box SOP stores the localmin/max in local coordinates as a detail attribute:
http://www.orbolt.com/asset/animatrix::box::1.00 [orbolt.com]

I submitted an RFE to have this info available as detail attributes for generator SOPs that take an input, so we wouldn't have to recalculate what was already calculated.

Hi,
Thats not it, its far more simple inputting animated geometry ie character waving hands around into the box sop will automatically calculated the bound as you scrub the timeline. what I am trying to get is grab the point along the time line where the box acting as the bound will be at its maximum and freeze it in sops. Currently I can use chops to find this out but its so slow even on one point.

Rob

Right on, I thought you want the maximum point in the box. I am interested in a solution too then (:

I just wish my brain wasn't like a sieve. its been a few months off Houdini in Maya > it was hell !

Rob

Solved …. saves using chops, this technique is so useful for a whole host of stuff

Rob

Thanks for sharing it.