Houdini 21.0 Nodes Copernicus nodes

Pyro Configure Copernicus node

Configures a Pyro simulation.

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Since 21.0

This node provides initial configuration of a Pyro simulation. This generates placeholder VDBs to provide the standard fields used.

Parameters

Divisions

How to specify the resolution or size of the simulation.

Voxel Size

Voxels are specified by world space coordinates. This works best for fully 3d simulations where these represent real units.

Resolution

Voxels are specified according to a resolution of the default imaging plane. This is a 2-unit wide square. This is useful if producing effects in a canonical imaging plane as you can tell how many voxels you have per pixel.

Voxel Size

The size of a voxel in world coordinates.

Resolution

The resolution the simulation will have if it fills the standard imaging plane. 2/Resolution is the voxel size.

Origin

Because VDBs are sparse, their origin is often immaterial. However, for small simulations it can be faster if the simulation entirely is in one octant of the index space. Biasing the origin can accomplish this.

There is also currently a 8192 maximum resolution, so for high resolution simulations away from the origin it may be necessary to adjust the origin.

Leaf Padding

If activation points are provided, this is the number of leaves to expand the activated voxels by.

The largest of Leaf Padding and Padding Distance will be used.

Padding Distance

If activation points are provided, this is the world distance to expand the activation. It will be rounded up to the nearest leaf.

The largest of Leaf Padding and Padding Distance will be used.

Inputs

activate_pts

Optional geometry whose points will activate leaves in the initial simulation.

Outputs

density

A float VDB for an initial density field.

v

A vector VDB for an initial velocity field.

temperature

A float VDB for an initial vector field.

See also

Copernicus nodes