grid gen

 

 

This generator will generate particles based on the voxel grid channels.

 

 

[Inputs]

 

Enabled - Enable or disable node evaluation.

 

Grid - Select available grid from the list. Any voxel simulation requires at least one of the nodes - FumeFX Simulation Ref or Initialize Grid node.

 

Particle Group - Generated particles will belong to this this group.

 

Cluster By - Each particle is automatically assigned to a cluster. There are several options how you can group particles into clusters.

• Constant - All particles that this node creates are assigned to the same unique cluster group.
• Simulation Frame - Only particles that are created on the same frame are assigned to the same unique cluster group.
• Object - Particles are assigned to the same unique cluster group based on the object they are created on.
• Particle - Each particle is assigned to its own unique cluster group

 

 

Generate

Time Start - Emission start time. There will be no emission before this frame.

 

Time End - Emission end time. There will be no emission after this frame.

 

Birth Rate ??? Controls the number of particles generated per active voxel. A value of 1.0 means each active voxel will spawn exactly one particle. Lower values (below 1.0) reduce the overall particle count by causing some voxels to skip particle generation..

 

Test Type ??? Determines how to process test conditions.

• Match Any - Particle will be created if any of the condition meets.
• Match All ??? Particle will be created if all conditions meet.

 

Use Source ??? Enable this option to generate particles on FumeFX source locations.

 

Use Fuel ??? Enable this option to generate particles in voxels where fuel content is between Fuel Min and Fuel Max values.

 

Use Fire ??? Enable this option to generate particles in voxels where fire content is between Fire Min and Fire Max values.

 

Use Smoke ??? Enable this option to generate particles in voxels where smoke content is between Smoke Min and Smoke Max values.

 

Use Temperature ??? Enable this option to generate particles in voxels where temperature content is between Temp Min and Temp Max values.

 

Use Velocity ??? Enable this option to generate particles in voxels where velocity magnitude is between Vel Min and Vel Max values.

 

Use Curl ??? When enabled, particle generation will occur only in voxels where the curl magnitude of the velocity field falls within the specified Curl Min and Curl Max range. This allows particles to be emitted based on local turbulence and rotational motion within the flow, making it useful for smoke wisps, swirling motion, or other turbulent fluid effects.

 

 

Properties

Life Span - Particle life span in frames. Particles that are older than its lifespan will be automatically deleted.

 

Life Span Var % - Life Span variation.

 

Size - Particle size.

 

Size Var - Particle size variation.

 

Density - Particle density. Particle mass is computed from particle size and density so that bigger particles will have bigger mass.

 

Density Var % - Density variation.

 

Seed - Random number generator seed. Change this value to get different pattern.

 

 

[Outputs]

 

Particle Stream - Generated particle stream.

 

Position - Position of generated particle.