CGTalk - dynamics run-up question

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Octagon

02-22-2003, 09:44 AM

hi there,
i'm wondering if i'm doing something wrong here.

i'm working on a shot which has some keyed charanim and also particle simulation. the problem is the shot starts at about frame 1200 and i cannot make maya perform its runup in an efficient way.

i have the start time attribute on all my particleShapes set to start at frame 1000, so the particles can "fill the place" until the shot actually starts. yet, maya performs the runup beginning with frame 1.
what's wrong here? i tried having the automatic runup options in the maya preferences enabled and disabled. i also checked out the runup mel command but couldnt find an option that let me perform a correct runup.

what i'm doing right now is finding the right parameters for my simulation (emission rates etc.) by running the simulation way over the length of the shot. when i _think_ i might have a good set of parameters I get a cup of coffee and wait for maya to do a runup to check how the simulation looks at the beginning of the shot. but this is really guesswork and even if the simulation might look fine on some later frame at the start time it might not look as good. that's why the runup issue is a bit annoying right now

i always thought maya would automatically start the run-up from the lowest start frame of a dynamic object (particle or rigid body).

*confused*
matthias

Sanctuary

02-22-2003, 03:37 PM

to "fill the place" you can use solvers -> save initial state

and cache your particles before you batch-render

hope this help :)

Octagon

02-22-2003, 08:49 PM

Originally posted by Sanctuary
to "fill the place" you can use solvers -> save initial state

and cache your particles before you batch-render

hope this help :)

thx for your answer.

i dont want to set my initial state since that state would be dependant on my emission rates, emitter sizes etc.

so if i changed say the rates of my emitters and would've set an initial state of my particles i would basically simulate off an incorrect state. i hope i make myself clear.

i'd much rather work out the run-up issues than to ship around it by using an initial state that is not correct anymore after changes to emitters, forces etc.

further input would be appreaciated!

matthias

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