falling drops and logo?

[Bonedaddy]

I'm having a hard time visualizing what you're trying to make. I couldn't find the kolektiv pepsi tutorial, so I'm not sure what you're talking about as reference. Could you post some pictures?

[DrChimay]

What i need to do is this, a surface with lots of water drops, flowing along the surface, simulating water drops, i know how to make that part of the effect, what i still haven´t figured out is how to create a shape (logo) made of the falling drops that grows and takes shape as drops start accumulating on that part of the surface.
Below there´s a link to an image of how the effect should look like.....

http://www.savefile.com/files/8729534

Hope i made myself clearer this time..... :thumbsup:

[frogspasm]

You could try using texture emission to generate a set of particles in the shape of your image, then use those as a goal for your falling particles.

~Mike D.

[DrChimay]

Thanks frogspasm, I think that could work, yes...
I didnt´realize that i can use the texture emitted particles as goals for those that are dripping.........BUT then i wont be able to use a single blobby particle system, therefore my falling particles wont mix with those acting as goals, i guess that could be fixed at post, with masks and stuff.........
Is it possible to find a solution where i can use a single particle node instead of two?

[Bonedaddy]

Well, the second one wouldn't render. It'd just be a goal for the first, blobby particles. The first particles would drip down the surface, then, at whatever point you want, move towards their goals -- the positions of the particles in the second particle system. Presumably there would be enough to make them all into one solid blobby?

[DrChimay]

Yeap you´re right Bonedaddy! i think that will work fine! :applause:

I´ve also tried to drive some of my particles attributes, eg. velocity, lifespan, using colorAtPoint command, that way i can tell my particles to decrease their velocity or even stop once they reach a certain RBG value, then all i have to do is use a texture of the logo in pure white and tell the particles to stop once the RGB is greater than 0.1.

Thanks for the help!!
-------------------------------------------
float $parentU = particleShape1.parentU;
float $parentV = particleShape1.parentV;
vector $value = `colorAtPoint -u $parentU -v $parentV -o RGB file1`;

if ($value>0.1)
{
particleShape1.lifespanPP=0;
}
else
{
particleShape1.lifespanPP=10;
}

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