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Differential D10147

Geometry Nodes: Initial support for volumes.
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Authored by Jacques Lucke (JacquesLucke) on Jan 19 2021, 3:27 PM.

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Reviewers
Brecht Van Lommel (brecht)
Hans Goudey (HooglyBoogly)
Maniphest Tasks
T84604: Support volume objects in the geometry node tree for moss use case
Commits
rB793547e7d140: Geometry Nodes: initial support for volumes
Summary

For the most part, this just adds boilerplate code for volume support in geometry nodes:

  • Add VolumeComponent next to MeshComponent, etc.
  • Support VolumeComponent in depsgraph object iterator.

Furthermore, I added initial volume support in a few nodes:

  • The Object Info nodes outputs an Object Instance when the input is a volume object (that will be the same for mesh objects soonish, to avoid copies).
  • Support transforming a VolumeComponent in the Transform node.
  • Support the VolumeComponent in Join Geometry nodes, but only when just one of the inputs has a volume component for now.

Right now there is no way to create a VolumeComponent, because the Object Info node outputs a Volume Object Instance. The VolumeComponent will be necessary for nodes like T84606: Points to Volume modifier for the moss use case. I tested the VolumeComponent code by outputting a copy of the volume from the Object Info node, but didn't want to commit that to master.

Viewport selection does not work correctly with VolumeComponents currently. I don't know why that is. That can be figured out a bit later, once we can actually create new volumes in geometry nodes.

Ref T84604.

Diff Detail

Repository
rB Blender
Branch
temp-geometry-nodes-volume (branched from master)
Build Status
Buildable 12274
Build 12274: arc lint + arc unit

Event Timeline

Jacques Lucke (JacquesLucke) requested review of this revision.Jan 19 2021, 3:27 PM
Jacques Lucke (JacquesLucke) created this revision.
Harbormaster completed remote builds in B12272: Diff 32912.Jan 19 2021, 3:27 PM
Jacques Lucke (JacquesLucke) edited the summary of this revision. (Show Details)Jan 19 2021, 3:31 PM
Jacques Lucke (JacquesLucke) added a project: Geometry Nodes.
Jacques Lucke (JacquesLucke) edited the summary of this revision. (Show Details)
Jacques Lucke (JacquesLucke) added a task: T84604: Support volume objects in the geometry node tree for moss use case.
Jacques Lucke (JacquesLucke) updated this revision to Diff 32914.Jan 19 2021, 3:36 PM
  • support building without openvdb
  • Add todo
Harbormaster completed remote builds in B12274: Diff 32914.Jan 19 2021, 3:36 PM
Jacques Lucke (JacquesLucke) mentioned this in D10150: Volumes: Fix calling BKE_volume_load from multiple threads..Jan 19 2021, 5:52 PM
Jacques Lucke (JacquesLucke) updated this revision to Diff 32957.Jan 20 2021, 11:52 AM
  • Merge branch 'master' into temp-geometry-nodes-volume
Harbormaster completed remote builds in B12292: Diff 32957.Jan 20 2021, 11:52 AM
Jacques Lucke (JacquesLucke) updated this revision to Diff 32962.Jan 20 2021, 1:34 PM

o - output instance in object info node

Harbormaster completed remote builds in B12297: Diff 32962.Jan 20 2021, 1:34 PM
Jacques Lucke (JacquesLucke) edited the summary of this revision. (Show Details)Jan 20 2021, 1:39 PM
Jacques Lucke (JacquesLucke) retitled this revision from Geometry Nodes: Initial support for volume components in geometry set. to Geometry Nodes: Initial support for volumes..Jan 20 2021, 1:54 PM
Jacques Lucke (JacquesLucke) edited the summary of this revision. (Show Details)
Jacques Lucke (JacquesLucke) added reviewers: Brecht Van Lommel (brecht), Hans Goudey (HooglyBoogly).Jan 20 2021, 1:56 PM
Brecht Van Lommel (brecht) awarded a token.Jan 20 2021, 2:00 PM
Brecht Van Lommel (brecht) requested changes to this revision.Jan 20 2021, 5:16 PM
Brecht Van Lommel (brecht) added inline comments.
source/blender/nodes/CMakeLists.txt
369–371

This is not needed, the volume object does not use our C API for OpenVDB.

376

Same, this can also be left out.

source/blender/nodes/geometry/nodes/node_geo_transform.cc
124

I was not aware of this limitation, where exactly does this go wrong?

149

Add missing params and put under an #else.

This revision now requires changes to proceed.Jan 20 2021, 5:16 PM
Jacques Lucke (JacquesLucke) updated this revision to Diff 32969.Jan 20 2021, 7:40 PM
  • remove unnecessary cmake code
  • fix unused var
  • Merge branch 'master' into temp-geometry-nodes-volume
  • fix scale check

Only scaling an axis to zero is not supported actually.
Negative scales are currently not drawn in the viewport, I assume this is a bug in drawing code.
I updated the check to only disallow zero.

Harbormaster completed remote builds in B12301: Diff 32969.Jan 20 2021, 7:40 PM
Brecht Van Lommel (brecht) accepted this revision.Jan 20 2021, 8:03 PM
This revision is now accepted and ready to land.Jan 20 2021, 8:03 PM
Closed by commit rB793547e7d140: Geometry Nodes: initial support for volumes (authored by Jacques Lucke (JacquesLucke)). · Explain WhyJan 21 2021, 10:38 AM
This revision was automatically updated to reflect the committed changes.
Jacques Lucke (JacquesLucke) added a commit: rB793547e7d140: Geometry Nodes: initial support for volumes.

Revision Contents
Changeset List

PathSize
source/
blender/
blenkernel/
27 lines
intern/
103 lines
2 lines
depsgraph/
intern/
24 lines
nodes/
14 lines
geometry/
nodes/
9 lines
10 lines
44 lines

Diff 32914

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source/blender/blenkernel/BKE_geometry_set.hh

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source/blender/blenkernel/intern/geometry_set.cc

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source/blender/blenkernel/intern/volume.cc

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source/blender/depsgraph/intern/depsgraph_query_iter.cc

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source/blender/nodes/CMakeLists.txt

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source/blender/nodes/geometry/nodes/node_geo_join_geometry.cc

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source/blender/nodes/geometry/nodes/node_geo_object_info.cc

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source/blender/nodes/geometry/nodes/node_geo_transform.cc

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