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New HiRes option for SimCloth


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#1 robcat2075

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Posted 09 April 2012 - 06:02 PM

From the new v17beta 02 ..


plugin simcloth
added option "HiRes Simulation" for the simcloth choregraphie properties with this option the simulation has more time to fix intersections and collisions so they will give a more precise result, but of course the simulation is slower




This should be huge for cloth users.

Steffen has added an option that somehow makes work a strategy that I've tried before with only slight success... drastically upping the number of time subdivisions that SimCloth uses.

ClothHiRes.JPG

HiRes ON temporarily increases the frame rate x 10 while the simulation is running. If you have Sub Steps set to 3, Sim cloth will now calculate the cloth's motion through 30 steps per frame instead of 3. The Cloth moves less per step, giving A:M more chance deflect CPs before they become unsolvable intersections.

In theory just setting Sub Steps to a 10x higher number should have the same result, but in practice HiRes has more success.

In one test I tried Sub Steps set to 300 and HiRes OFF did not get as far before failing as setting SubSteps to 30 with HiRes ON.

It IS slower to run a simulation with HiRes ON but one successful slow simulation gets you your goal while several fast simulations that fail will not.

Cloth can still fail in long shots for no obvious reason and will certainly fail when impossible situations have been created, but I think this HiRes option will be of great benefit for most endeavors

Robert Holmén
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#2 robcat2075

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Posted 09 April 2012 - 06:26 PM

Since it's not widely understood, I'll note that "Adaptive Subdivisions" is the number of times Sim Cloth will double the SubSteps number if it has encountered an intersection. For Example: If SubSteps is set to 10 and Adaptive Subdivisions is set to 4, SimCloth will try 10 steps first, then 20, then 40, then 80, then 160 If it reaches the limit and still has an intersection, SimCloth will continue on to the next frame anyway, but once an intersection has happened things usually go bad pretty fast, the "collision"count escalates and the simulation may start sending the cloth in all sorts of crazy directions.

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81,263 pushed!: the #1 heavy push on Youtube

I'm a 2D wannabe: heads-a-dozen

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I solved your problem? buy me something (used is OK!) Big thanks to... NancyGormezano, Roger, cribbidaj, thefreshestever, Tom, Dalemation, Simon Edmondson, thejobe, Rob_T (2 more x), agep (again!), itsjustme, jason1025(+1), dblhelix (+1),markw, Roger (3x!), mouseman (x 2!), Xtaz, agep, Gerry, thefreshestever, dblhelix (twice!), jason1025, Luuk Steitner, PDM, Rob_T and Dhar!


#3 John Bigboote

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Posted 10 April 2012 - 05:25 AM

Interesting! Great new feature! Thanks for the explain!

#4 mouseman

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Posted 11 April 2012 - 06:45 PM

Added a link to this page to the A:M History wiki page.
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#5 jason1025

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Posted 11 April 2012 - 10:01 PM

this should help a lot
Free tuts

http://www.hash.com/forums/index.php?showt...t=0#entry319614


I have hours and hours of organized free Video tutorials on Data DVD. Because Storage and bandwidth are an issue its difficult to give these for free as they not only cost me money I can not pay for delivery and the time it takes to burn them for you. I will send you all the free organized video tutorials regarding AM I have. The link below will help you get the ball rolling.

http://amzn.com/w/1U5OSC58ULT9Q



Best regards
Jason Hampton
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#6 John Bigboote

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Posted 12 April 2012 - 08:43 AM

Anyone who gets a chance to try her out... would love to see results or hear about it.

#7 robcat2075

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Posted 12 April 2012 - 09:20 AM

Anyone who gets a chance to try her out... would love to see results or hear about it.


Here's a comparison of the results with my pants test with 300 Substeps, HiRes OFF vs. 30 Substeps, HiRes ON

Attached File  Walk300SubStepsHiResOFF.mov   112KB   77 downloads

Attached File  Walk30SubStepsHiResON.mov   309.13KB   103 downloads

They both have the same number of SubSteps per frame and should have similar success, but the HiRes OFF version has begun to fail after just a few seconds. Both the left and right pant legs have caught on the feet and are beginning to explode.

The HiRes ON version sails through.

Robert Holmén
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this is only a ... my gallery of A:M tests

81,263 pushed!: the #1 heavy push on Youtube

I'm a 2D wannabe: heads-a-dozen

my tutorials All my most beloved tutorials in one convenient location. Except for the ones I've forgotten about.

I solved your problem? buy me something (used is OK!) Big thanks to... NancyGormezano, Roger, cribbidaj, thefreshestever, Tom, Dalemation, Simon Edmondson, thejobe, Rob_T (2 more x), agep (again!), itsjustme, jason1025(+1), dblhelix (+1),markw, Roger (3x!), mouseman (x 2!), Xtaz, agep, Gerry, thefreshestever, dblhelix (twice!), jason1025, Luuk Steitner, PDM, Rob_T and Dhar!





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