ncloth burn

#1

So, I think I have seen this before somewhere in here, but can’t remember where. I’m trying to connect the tear able surface vertices of an ncloth object to the density of a fluid container. So if something ripped through, it would set the vertices around the tear on fire. Ideally would be nice for it to spread to other parts of the ncloth after it starts.

Thanks

(edit) ah nevermind, I found the burn propagation link. I think I can figure it out from there.

#2

Just a thought… you could use a Maya Toon node to create toon lines on border edges(the tears become borders) then convert toon to poly and do fluid: emit from object.

#3

Another awesome idea D!
Although it wont get as smooth and fluid looking burn as your earlier examples -
http://vimeo.com/18071688
But I can see this working great for down and dirty dust fx or emission off objects that break or tear quickly!

How do you get toonfx to not make a border edge on an open object such as a plane though? Did a quick test with this model and of course the outside of the plane creates toon fx…

#4

just set the “border line width” (or what you don’t want) to 0. So even if it’s still visible in wireframe, it will not appear in the polygon mesh conversion

#5

Thanks but that then defeats using Border Edges :wink:

Using Duncans technique, if you have an open edged object, such as a plane for a burning piece of paper, the fluids will emit from the outside edges of the paper, before a tear… along with the newly created edges from tearing… hopefully there is a way to distinguish between a beginning border edge and a newly created one?

Playing with Curvature Modulation helped a bit, but not perfect…

#6

Create a texture on the line width (lineWidthMap attribute) with black along the border and white everywhere else. The zero width lnes do not get converted to poly.

#7

Not bad, didnt see the line width map :wink:

Yep, nice for quick down and dirty, explosive puffs of smoke or dust emission on fast moving shots…but your other technique - using a fluid to control the emission, gives a much nicer, smoother soft transition for the fluid emission or a burn texture.

Thanks Duncan , keep em coming, love all the tricks! :smiley:

#8

yeah… sorry I read the post tooooo quickly :bowdown:

#9

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