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AddyJ

applied rigids II

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Hey guys,

 

I'm currently working my way through these tutorials. I've started with Applied Dynamics series and have now moved on to the rigids series. They're excellent and have taught me a lot! I'm currently on Rigids II - where we're taken through how to 'destroy' a block, ie a building. 

 

I'm on chapter 7b-c, and I've come a little unstuck and i'm not sure where. Essentially, a meta-ball should be activated on frame 3 via a switch. What's happening is that inside the SOPSolver which is inside the Dop network, the solver is supposed to break the constraints at frame 3 and then continue to break them. But what's actually being sim'ed is completely not what i'm expecting. The building just collapses. No real explosion, nothing compared to what's being seen in the tutorial video (and I've restarted a couple of times for various other things i've missed.

I've uploaded my hip file. Would someone mind helping me understand where I'm going wrong?

lesson07.hip

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in DOP, you don't see any glue.....(light blue and purple lines) alarm bells should be ringing LOUD !!!

01) your constraint naming, runs over points, it should be primitives (ie. a line made of 2 points, the 'connection' line)

02) i see this regulary, typo, yes a simple typo...your s@contraint_name = 'Glue_Outside'; is missing an S, constraint_name

Now go back to DOP, you'll see glue representations lit up the scene !!!

It's not working yet...I think you have to do some conversion when breaking the glue...haven't investigated up to this part yet...you can take over :) ...

Edited by Noobini

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OMG!!! HA!

I've been over and over that glue_outside and missed that! 

I'm probably going to re-go-over (for the 15,000th) time the lesson 07 from start to finish. I'm sure I've missed something!! The issue now is the sim doesn't move at all (It's sim'ing but it appears as if nothing's going on!). I've also fixed the glue_inside's strength back to the default!

It also helps to re-activate my force group!! :)

Thanks so much Noobini! I really appreciate the help!

Edited by AddyJ

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yeah i think the glue breaking needs cheking....(ie. the conversion/promotion to prims)...can't be 100% sure but I think you are missing that step ?

did you do 'activate' part ?

Edited by Noobini

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I can't figure this one out....If I sim the current file, works roughly as expected (except be building looks like it's collapsing before the explosion). But if I change a parameter (such as Glue_Outside to 1 or add a new node), it doesn't sim at all.

Help me understand this!

 

lesson07.hip

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mmm...if you simply disable the popmetaballforce1, run the sim, the building will not collapse..so it works...

I've also tried your Glue_Outside = 0 or 1 (reenable metaball)...both work...ie. the metaball will destroy the building...

Edited by Noobini

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I'm still playing around with this.

 

Removing the '*' from either the Glue_Outside group seems to sim it better - or as expected..... I'm, just not sure if I should be doing that or not!!

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