OpenVDBExtensions

A collection of extensions built using the low level OpenVDB, and embree and the higher level OpenVDBWrapper, OpenVDBInlineDrawing, OpenVDBGeometry. There are three extensions: Slavr, VdbVoxelizer, and VolumeCache.

Slavr

Something like a volume renderer.

Facts:

• Slavr is just a gizmo for rendering to a texture on the viewport (renderview).
• Slavr's first ray traversal, is handled by embree.
• OpenVDB is used to perform pex<<<>>> access on the voxels.
• embree is used to perform geometry queries on VDBVolumes's bounding boxes (by extending User Defined Geometry in https://embree.github.io/api.html).

Requires:

• OpenVDB, embree (https://bitbucket.org/holofermes/kl-externals).
• OpenVDBWrapper, OpenVDBGeometry, OpenVDBInlineDrawing (https://bitbucket.org/holofermes/openvdbwrapper).
• VolumeCache

Example:

From a bash shell, load the FE environment, cd into the root of this repo, and run:

source ./environment.sh
canvas examples/canvas/slavr.canvas

Load the path with a vdb file, and set the field to a valid field's name. The viewport will fill with a black mask. Press the Q key to toggle the tool. When the tool is enabled you will see a black box following the mouse. Hold ctrl and drag around the region, and the rendering will start immediately. Right click to re-render. Loading an example file from the OpenVDB repository, it looks like this:

VdbVoxelizer

VdbVoxelizer provides a geometry shader which draws boxes given from point position, normals, and samples.

Requires:

• OpenVDB (https://bitbucket.org/holofermes/kl-externals).
• OpenVDBWrapper, OpenVDBGeometry, OpenVDBInlineDrawing (https://bitbucket.org/holofermes/openvdbwrapper).

Example:

From a bash shell, load the FE environment, cd into the root of this repo, and run:

source ./environment.sh
canvas examples/canvas/vdbvoxelizer.canvas

Activate the instance in the volumeToMesh backdrop to enable the mesh, and it should look like this

VolumeCache

Inspired by alVolume's VolumeCache.

Requires:

• OpenVDB (https://bitbucket.org/holofermes/kl-externals).

dfg

To regenerate the dfg extensions run

extsringlength=5
for fold in $( ls Exts/*/ -d)
do
    ext=${fold:$extsringlength}
    ext=${ext%%/}

    rm -rf dfg/$ext
    mkdir -p dfg/$ext
    kl2dfg -polymorphism Exts/$ext/$ext.fpm.json dfg/$ext
done

Copyright

This software is released under the MIT licence

Copyright (c) 2016 Fabio Piparo

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.