Slide on Surface

This compound make particles slide and drip off one or more objects' surfaces upon collision.

Plug its Execute output into a Port of the ICETree node or in an Execute port of a State compound, if you're using the state system.

Tasks: Particles/Surface Interaction

Output Ports: Execute

Enable

Toggles the activity of this compound.

Slide Parameters

Surface1	The object upon which the particles slide upon collision. This object must have a surface. Plug the object's Value output into this port.
Select Offset Method	The method by which the particles are offset from the object off which they're sliding: Use Particle Size or Use Offset Distance.
Offset Distance	If you selected Use Offset Distance as the Offset Method, you must enter the number of Softimage units by which the particles are offset from the object.
Surface Friction	The amount of friction/resistance that the object has to prevent particles from sliding.
Enable Rolling	Allows particles to roll along the object surface as they slide. This uses the Roll Particle compound to calculated the rolling.
Execute on Collide	When the particle collides with an object, whatever compound or node is plugged into this port is executed. For example, if the Set Particle Color compound is plugged in here, the particles change color upon collision.
Execute While Sliding	When the particle slides on an object, whatever compound or node is plugged into this port is executed. For example, if the Set Particle Size compound is plugged in here, the particles change size when they slide.

Drip Parameters

Angle Threshold	The angle at which the object needs to be before particles will drip off it. This is based on the obstacle's surface normals and gravity or other forces in the scene. At a low angle, the particles will not drip off easily, whereas at a high angle, they drip off quickly.
Force Threshold	The maximum force required to make the particles drip. This is used mostly when the obstacle is moving and you want the particles to slide off the surface based on the obstacle's velocity. A high threshold makes it more difficult for the particles to drip off, whereas a low threshold makes it easy for them to slide off.
Min Neighboring Particles	The minimum number of neighboring particles that need to be together within the cutoff distance so that the particles will drip. This is useful for effects such as dripping water, where a certain amount of water drops must collect before they have enough mass to drip.
Cutoff Distance to Neighboring Particles	The distance (in Softimage units) in which the particles must be from each other before they can drip.
Execute on Drip	When the particles drip off an object, whatever compound or node is plugged into this port is executed. For example, if the Set Particle Color compound is plugged in here, the particles change color when they drip.