[Bob]

Hello again. I'm using maya's default ocean. I would like to know how I go about expressions so that I can emit particles where foam is.

thank you.
B

[daisuke]

foam is normally white so you can use 'colorAtPoint' function to get color data from the ocean shader..

vector $myPos = particleShape1.position;
float $px = $myPos.x;
float $pz = $myPos.z;
float $colorInfo[] = `colorAtPoint -o RGB -u $px -v $pz oceanShader1`;

use $colorInfo[0],$colorInfo[1],$colorInfo[2] in a conditional statement to determine where are white areas(foam). <<1,1,1>> is white so I would find points where the data is higher than 0.6 or something like that.

then emit particles from there.

[frantejo]

i am new to the forum, are some examples of how to do it, try it and I could not, thanks