Geometry Nodes: Add OpenVDB grid operators

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Adds four new grid operator nodes that wrap OpenVDB's differential
operators. All nodes take a grid input and output a grid, potentially
with a different data type.

New nodes:
- Grid Curl: Calculate curl of vector field (Vec3 → Vec3)
- Grid Divergence: Calculate divergence of vector field (Vec3 → Float)
- Grid Gradient: Calculate gradient of scalar field (Float → Vec3)
- Grid Laplacian: Calculate Laplacian of scalar field (Float → Float)

These operators enable vector calculus operations on volume grids for
effects like flow analysis, vortex detection, etc.

Co-authored-by: Hans Goudey <hans@blender.org>
Pull Request: https://projects.blender.org/blender/blender/pulls/146845

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This commit is contained in:

Brady Johnston

2025-10-02 16:28:46 +02:00

committed by Hans Goudey

parent fdfbb3ad20

commit 0a77a57c4e

8 changed files with 218 additions and 0 deletions

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