NAME
vdb_lod - generates a volume mipmap from an OpenVDB grid
SYNOPSIS
vdb_lod in.vdb out.vdb -range FROM[-TO[:STEP]] [options]
DESCRIPTION
Which: generates a volume mipmap from an OpenVDB grid Where:
- FROM
-
is the highest-resolution mip level to be generated
- TO
-
is the lowest-resolution mip level to be generated (default: FROM)
- STEP
-
is the mip level step size (default: 1)
OPTIONS
- -name S[,S,S,...]
-
name(s) of the grid(s) to be processed (default: process all grids of supported types)
- -keep
-
pass through grids that were not processed (default: discard grids that were not processed)
- -nokeep
-
cancel an earlier -keep option
- -p, -preserve
-
if only one mip level is generated, give it the same name as the original grid (default: name each level "NAME_level_N", where NAME is the original grid name and N is the level number, e.g., "density_level_0")
- -nopreserve
-
cancel an earlier -p or -preserve option
- -version
-
print version information
Mip level 0 is the input grid. Each successive integer level is half the resolution of the previous level. Fractional levels are supported.
EXAMPLES
-
Generate levels 0, 1, and 2 (full resolution, half resolution, and quarter resolution, respectively) for all grids of supported types and ignore all other grids:
-
vdb_lod in.vdb out.vdb -range 0-2
-
Generate levels 0, 0.5, and 1 for all grids of supported types and pass through all other grids:
-
vdb_lod in.vdb out.vdb -range 0-1:0.5 -keep
-
Generate level 3 for the first of multiple grids named "density":
-
vdb_lod in.vdb out.vdb -range 3 -name 'density[0]'
-
Generate level 1.5 for the second of multiple unnamed grids and for the grid named "velocity" and give the resulting grids the same names as the original grids:
-
vdb_lod in.vdb out.vdb -range 1.5 -name '[1],velocity' -p
AUTHOR
This manual page was written by Mathieu Malaterre <[email protected]> for the Debian GNU/Linux system (but may be used by others).