Houdini 13.0 Nodes

Version 0.0.1

An infinite collision ground plane.

This POP implements a collision plane of infinite dimensions perpendicular to the world positive Y axis.

Unlike the Limit and Collision POP nodes, this operator doesn’t require any accuracy settings, and no particles will be leaking below the ground plane.

Parameters

Activation

Turns this node on and off. The node is only active if this value is greater than 0. This is useful to control the effect of this node with an expression.

Note that this is activation of the node as a whole. You can’t use this parameter to deactivate the node for certain particles.

Source Group

Only affect a group of points out of all the points in the input.

Collision Group

Add particles to this group that were currently collided.

Preserve Group

Append to the contents of the collision group instead of replacing it.

Warning

This function is not yet implemented properly.

Height

Height of the collision plane in world space. The plane is always perpendicular to the world Y axis.

Gain Tangent

Energy loss tangent to collision.

Gain Normal

Energy loss normal to collision.

Release Notes

Version 0.0.1

First prototype.

Warning

The Preserve Group function does not work.

TODO
  • fix/implement Preserve Group properly

  • freeze particles below a minimum velocity (to get rid of jittering of almost-stopped particles)