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mazm
06-15-2008, 06:30 PM
Hi,

I new in dynamics world, I did many tutorials with Alex Alvarez.
I'm trying to make an explosion.... I did it but i want to start the explosion when let's say sphere hit the ground.

sphere will be a fire ball so when it hits the ground will explode.
i'm think about worldPosition when it is 0 the explosion particles will start emitting but i don't know how to do it.

any ideas

fedayi
06-16-2008, 04:33 AM
in the particle shape node
in time attributes
there is a place called, "time start"

just put in whatever number you want in there, and at that frame is when the particle will start emitting.

mazm
06-16-2008, 04:45 PM
thanks a lot.
but when i put in my scene, everything missed.
i'm using instance so shall i do it again, because i scale it and move it in the right position.

Pyrokinesis
06-17-2008, 09:42 AM
you can set stepped keys on the emitter rate attribute timed to when your fireball hits the ground. This works great unless your fireball animation changes, then you need to write a script.

Pyrokinesis
06-17-2008, 09:56 AM
If your fireball is an instance you could create a collision event.

mazm
06-17-2008, 11:09 AM
thanks a lot, it working now but i have got this message in the command line while i'm trying to render

Warning: Cycle on 'smokeTrailShape.ageNormalized' may not evaluate as expected.
(Use 'cycleCheck -e off' to disable this warning.)
Warning: Cycle on 'arrayMapper2.outValuePP' may not evaluate as expected. (Use
'cycleCheck -e off' to disable this warning.)
Warning: Cycle on 'smokeTrailShape.ageNormalized' may not evaluate as expected.
(Use 'cycleCheck -e off' to disable this warning.)
Warning: Cycle on 'fireyShape.ageNormalized' may not evaluate as expected. (Use
'cycleCheck -e off' to disable this warning.)
Warning: Cycle on 'arrayMapper5.outValuePP' may not evaluate as expected. (Use
'cycleCheck -e off' to disable this warning.)
Automatic near/far clipping values: 0.1, 909.026.
Starting Rendering X:/myDocuments/par
ticExplo/reder_n_t2.475.tif.
Constructing shading groups

Warning: incandescencePP is not defined on particle shape


can anyone explain to me what is this !

thanks

Pyrokinesis
06-19-2008, 09:40 AM
Not all cycle errors are bad, but look up cycleCheck in the docs, or type the error in a google search for an explanation of whats actually going on. The other error is pretty self explanatory.

Have you made progress? post a render when your done.

mazm
06-19-2008, 11:42 AM
unfortunalty, No
I tried a lot to render and it is working in the pres, but if I try to render from different camera it doesn't work.
I have camera tracking so i must render from this camera.

I will let you know when i finish

thanks

mazm
06-19-2008, 04:29 PM
here is my scene and i hope someone can help me ...asap
it was ok in the original scene but when i imported in the main one it is not working

just want to render .... sorry i'm newbie in this area

Pyrokinesis
06-20-2008, 11:31 AM
I opened this file in Maya 2008 and rendered with no errors. The smoke looks like cotton balls, but other than that...

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