Lagoa Set Collision Data

Elastic Breaking Point

The breaking point of the elastic link made between elements and this collision object. This is used for points that stick to the collision object.

Select the Display Elastic at Boundaries option in the Lagoa Simulate Multiphysics node to display these links.

The elastic link will break based on the value you set:

• 1 = the elastic link can stretch to its known rest distance, which is relative to the point size (as determine by the Resolution set in the Emit node). If it's low resolution (big points), you don't want it to break apart just because it's too big for the rest distance and offsets.

• 1.1 = 10% of the link's distance can be taken from this collision object.

• 2 = the elastic link can stretch up to two times more than its rest distance (the collision object * the element's contact point).

Note: This parameter is concerned only with breaking the links between elements and collision objects. It does not consider the Elastic Breaking Point value set for elastic structures in the element's Material node.

No Slip

The amount that this collision object tries to prevent points from slipping when they come in contact with it.

To have more control over how slippery the collision object is, use a combination of this parameter and Static Friction.

In real life, any particle that is in direct contact with a surface has either no slip or a very low amount of slip because of the friction between the masses.

Make sure to select the Enable No Slip option in the Lagoa Simulate Multiphysics node to use this value in calculating the simulation.

Soft Repulsion

Soft repulsion is a force that attracts points to, or repulses points from, a collision object. It acts as a magnet, attracting or repelling the points when they are within a certain distance of a collision object.

This parameter is a multiplier that is applied to the soft repulsion force that affects points that come in contact with this collision object. Set the value of this parameter to a positive number to make it a repulsion force; set it to a negative number to make it an attraction force.

This force is computationally inexpensive to use, and is very useful for achieving certain effects. For example, you can make elements "float" on top of the collision object so that they are never in contact with it. Conversely, you can make them really stick to the collision object, even on the underside of a table (the particles point in the opposite direction of the collision object's normals).

Soft repulsion also helps to make points appear to follow a collision object when they are within the distance defined by the Offset Method in the Lagoa Simulate Multiphyics node.

Make sure to select the Enable Soft Repulsion option in the Lagoa Simulate Multiphysics node to use this value in calculating the simulation.