Houdini 21.0 Nodes Copernicus nodes

Pyro Source from Points Copernicus node

Sources points into a VDB.

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Since 21.0

This operation will update a Float VDB from provided point sources. If no geometry is provided, it uses its parameters, otherwise the points in the geometry are used.

Each point becomes a sphere that will update the overlapped voxels of the VDB.

Note

This does not activate any voxels, so any sources outside of activated areas will have no effect.

Note

Every point is sourced against every voxels, so the total point count should be kept reasonable.

Parameters

Method

How to update the VDB from the point values.

Set

Replace the value.

Add

Add to the current value.

Minimum

Take the minimum of the current value with the point values.

Maximum

Take the maximum of the current value with the point values.

Shape

Radius

The radius of the sphere to stamp into the VDB. This is scaled by the pscale point attribute.

Center

If no geometry input is present, a single point will be sourced at this location.

Scale by Timestep

Scale the point values by the current timestep. In Add mode, this ensures the same amount will be added over a second even if substepping occurs.

Amount

The density to use for the point. This is scaled by the density point attribute.

Falloff

The amount is scaled by this ramp, the left side is the value at the point location, and the right side the value at the point’s radius.

Enable Noise

Noise Enable

Enable scaling the value by a noise function.

Noise Scale

How much to scale the value by.

Element Size

The size in world space of the feature size of the noise.

Element Scale

The anisotropic scaling of the noise feature sizes.

Noise Offset

The offset of the noise in noise-space, the first three are the spatial offset and the fourth the time offset.

Noise Pulse

The time in seconds for the feature size of the noise’s change over time. This is roughly the rate at which it will seem to pulse.

Enable Distortion

Distort Enable

Enable distorting of the shape of the sphere by a noise function.

Distort Scale

How far to distort in worldspace.

Element Size

The size in world space of the feature size of the noise.

Element Scale

The anisotropic scaling of the noise feature sizes.

Distort Offset

The offset of the noise in noise-space, the first three are the spatial offset and the fourth the time offset.

Distort Pulse

The time in seconds for the feature size of the noise’s change over time. This is roughly the rate at which it will seem to pulse.

Inputs

source

A Float VDB to apply the source to.

points

An optional Geometry whose points are used as sphere sources.

Outputs

result

The source VDB modified by the sourcing points.

See also

Copernicus nodes