Updated Documentation for Lagoa Compounds

The following changes had been made to these Lagoa compounds after the final documentation had been complete for Softimage 2011 Subscription Advantage Pack, so we thought we'd pop the missing information up here until the next release comes out.

Table of contents

Lagoa Add Forces

The Lagoa Air Wind node is now embedded in the Lagoa Add Forces compound.

All Lagoa Air forces are built in the framework and can understand the interface between air and particles by considering that there is air wherever there is no point with mass.

Lagoa Air Wind

This compound has been updated.

It generates a directional force with strength that respects the density of the points; for example, points inside a pile won't be affected by the wind.

The Air Density Curve has been renamed to Air Contrast Curve.

This profile curve is the contrast between air and the points' mass, allowing you to control the interface between air and the simulated points. For example, if there 's a pile of dust and the wind starts blowing, only the points that reach the highest point of contrast in this curve will be affected by the wind. Points that are lower on the contrast curve are more likely to be occluded from the wind. For example, the wind won't reach points inside a pile because they are occluded by other points.

Lagoa Emit Grid

  • The Length parameter has been renamed to Height.
  • The Thickness parameter has been renamed to Depth.

(Height = Y; Width = X; Depth = Z)

Lagoa Fluid Shaper

The Thinnest Layer parameter has been added and Profile has been implemented.

Thinnest Layer: Prevents the mesh from becoming completely flat (top and bottom superimposed).

Profile: Controls the falloff of the flattening effect.

Lagoa Init Curve

This new compound allows you to deform a curve using Lagoa directly. It is used in exactly the same way as Lagoa Init Geometry is used on polygon meshes.

The parameters are the same as for Lagoa Init Geometry with one addition:

Closed Curve: Simulates the curve as if it is closed, so that the two ends of the curve are considered connected. If this is not enabled, the last point and first point will be considered beginning and end of a curve, respectively.

Lagoa Init Emitter Volume Data

This new compound initializes volume emitter objects that are in a group. You need to plug this node into an ICETree node on each volume emitter object in a group so that the Lagoa Emit Volume compound can properly compute the proper transform and bounding box limits of each emitter.

Then you can plug the emitter group's Get Data node into the Lagoa Emit Volume compound as usual.

You do not need to use this node if you're using a single volume emitter object.

Lagoa Main Material

This port is now exposed:

Viscosity Contrast: This parameter sets the threshold at which a liquid reaches its viscous condition. Low values allow liquids to become viscous more easily.

For example, to change between viscous and non-viscous conditions, you can keep the Viscosity Multiplier value the same, then simply adjust this parameter's value.

Lagoa Point Duplicator

This port has been added:

Relative Size: Controls the initial size of the cloned points in relation to its parent point.

Lagoa Simulate Multiphysics

These parameters have been removed:

  • Soft Repulsion Multiplier
  • Rest Distance
  • Distance to Surface

Only the Soft Repulsion Multiplier parameter is necessary, and is now exposed in the Lagoa Set Collision Data compound for each collision object.

Lagoa Set Collision Data

This parameter has been moved here from the Lagoa Simulate Multiphysics compound:

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 parameter in the Lagoa Simulate Multiphyics node.

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

Lagoa Transform Constraint

The Once at Frame parameter has been renamed to Update Mode.

In addition the following has been added:

Consider Scale: A Boolean value that allows the transform constraint to consider the scaling of the In Name Null to be a deformation of the initial state. If this is True, then scaling the null deforms the constrained points, as opposed to affecting which points get constrained (when Update Mode is "Every Frame").

This page was last modified 19:55, 8 Dec 2010.
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