Split Group Test

The Split Group test splits the particle stream based on the particles’ selection status, as defined by a Group Selection operator.

• Particle View > Click Split Group in an event or add a Split Group test to the particle system and then click it.

Interface

Group Selection Operators

Lists the Group Selection operators holding the particle selection to split. If a single Group Selection operator exists in the event, that operator will be added to the list automatically.

Add

Opens a selection dialog so you can choose one or more Group Selection operators to add to the list. This dialog has the same controls as a Scene Explorer.

Remove

Removes the highlighted entry from the list.

Use Proxy Particles

When on, you can split the particles based on their selection status in a particle system other than the one that contains the Split Group test.

Proxy Particle System

To specify a proxy particle system, click this button and then select the proxy’s icon. If the current event contains particles that meet the “Test True if Particle” condition (see following) as specified by a Group Selection operator in the proxy system, Particle Flow will send those particles to the next event.

Proxy Index --> Particle Index

Multiplier

Applies a multiplier for index values of particles in the proxy system. So, for example, if Multiplier is set to 2.0 and the particles that test true in the proxy system have index values 4, 5, and 8, then the particles that actually get split off will be those with index values 8, 10, and 16.

Index Offset

Adds the specified value to index values of particles in the proxy system. So, for example, if Index Offset is set to 5 and the particles that test true in the proxy system have index values 4, 5, and 8, then the particles that actually get split off will be those with index values 9, 10, and 13.

Test True if Particle

Lets you specify how to determine whether particles should pass the test and move on to the next event. The choices are:

• Selected In All Groups Only particles that belong to all listed groups can pass the test.
• Selected In Any Group Particles that belong to any listed group can pass the test.
• Selected In Single Group Only particles that belong to only one listed group can pass the test.
• Not Selected In Any Group Only particles that belong to none of the listed groups can pass the test.