Hi, I've attached a scene where I followed the Go Procedural Lesson 1 Quickstart tutorial.. and I'm kinda stuck with the part where I'm supposed to use the RBD Point Object to instance the columns to the points of a polygon circle for rigid body simulation.



What happens in my scene is that the columns would just disappear after the operation.

But I did test it on a new scene with just a Box, and it works.

Regards,
Jeff

But I did test it on a new scene with just a Box, and it works.

Testing and trying to debug why things don't work is a good skill to have, if your work flow works on a box , peel open your scene and start replacing nodes or turning them off. ie pipe a box where the column geo goes into DOP's > see what happens. The beauty of Houdini is at least you know where to find everything so you can work backwards to debug.

Rob

Thanks again Rob

I did a test on just simple boxes and took close attention to what's happening inside the autoDopNetwork, I'm beginning to have a much clearer sense of the flow. Working it off from a much simpler scene helps make me understand it much easier.

I'll update this thread if I find the source of the problem.

Thanks and kind regards,
Jeff

Finally found the problem, and it was such a newbie mistake ops:

On a simple working scene.. the clue I found was that the DOP Network had the parameter Time Step colored Green. But on my ‘non-working’ scene.. the same parameter was colored Cyan.

Then looking through the help file, it mentioned that a cyan colored paramter may have the current frame not be a keyframe.

So I looked at where my current frame is.. and lo and behold, I was not at frame 1 while while doing the RBD Point Object procedure!

Lesson learned.. (which I now remember the tutorial was constantly reminding the viewer).. always go back to frame 1! :!:

I also learned that Houdini saves your current time with the file.

Thanks again Rob for having patience to new guys like me

Its never a mistake, when working with Houdini and solving problems you run into this stuff all the time. My best advis is keep a online note book you can use to store information and scene files, that you can refer to any time.
unless that is you have a photographic memory!



Rob