Volume

Important

You must have installed pyopenvdb to use this feature.

It is possible to generate volume sequences for TELEMAC-3D files.

These volume sequences are exported as .vdb file sequences.

The VDB format is a common file format used for volumes in computer graphics.

Generate volume sequence

This operator lets you generate volume sequences from TELEMAC-3D files.

Point data are exported "raw" (without any remapping). Thus, you can use the 'Map Range' node to do so.

Hardware

• Mode: computation mode, select one from:

  • Default: can be very slow for large dimensions.

  • Multiprocessing: multi-threading computation mode, can speed up a lot the computation.

  • CUDA: make use of CUDA capable device (if numba is installed), can dramatically improve the computation speed.

Volume

Size

• Volume definition: define the volume dimensions either by providing dimensions or a voxel size.

  • Dimensions: define the volume by giving custom dimensions (L x W x H).

  • Voxel size: define the volume using a voxel size.

Density

• Add: add a point data to export in voxels. For now, it is limited to only one point data exported at a time.

Interpolation

Space

• Type: type of interpolation.

• Steps: number of planes to interpolated between each known plane.

Time

• Type: type of interpolation.

• Steps: number of time points to interpolate between each known time point.

Sequence

• Output directory: path to the directory where to place generated .vdb files.

• File name: name to give to the generated files.

• Start: starting point of the sequence to export (time point).

• End: ending point of the sequence to export (time point).

Example of generated volume sequence:

Set volume origin

This operator lets you align (in the 3D space) a generated volume sequence to your TELEMAC-3D file.

The volume will also be resized to match the dimensions of the model.

Selection

• Target: target model to fit dimensions and origin.

Before:

After: