adam gailey

hello,

I was wondering how to group flip fluid particles based on an initial collision with static objects in DOPS? I only want the group to contain the particles which have just collided. Any ideas?

thanks,

Adam

Hello,

I have created a particle system and have copy stamped a primitive sphere onto each of its points. I have chosen to allow point attributes to affect the spheres. This allows me to get varying opacity on each sphere as I have used a rand($ID) expression in the lookup parameter of the alpha ramp tab of the color POP in my particle network.

I was wondering if someone might be able to help me with an expression that could not only create a random opacity for each point but also fade that random value down to zero over the course of the particles life…

It thought of using a rand in conjunction with a fit but I cant get anything to work very well. any suggestions?

Thanks very much in advance,

Adam

Hello,

I would like to constrain a RBD object to one of the wires in the attached simulation. I have tried using several different kinds of constraints but nothing really does what I want. I simply want to add an object to the end of one of the wires that will act as a weight and affect the movement of the wire.

Also, is there a way to attach the constraints to a point on a piece of geometry rather than an arbitrary point in space? Really enjoy working with wires in Houdini but need a bit of help to take things to the next level.

Thanks in advance for any tips or advice.

Adam