Geometry Nodes: Sample grid node #118397
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Lukas Tönne
Jacques Lucke
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Reference: blender/blender#118397
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Delete Branch "HooglyBoogly/blender:geometry-nodes-sample-grid"
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This simple node finds the values of a volume grid at
positions in the local space used in geometry nodes
evaluation. There are three interpolation modes to
choose how to mix values between neighboring voxels.
For the implementation, first the values are sampled
with the grid's type directly, then implicit type conversions
are used to get the final type. This makes gives us flexibility
in case there aren't exact matches in support between grid
types and Blender types.
@ -0,0 +234,4 @@params.set_output("Value", std::move(output_field));#elseparams.set_default_remaining_outputs();node_geo_exec_with_missing_openvdb@ -0,0 +249,4 @@{0, nullptr, 0, nullptr, nullptr},};static const EnumPropertyItem grid_type_items[] = {I think using a filter function is better than duplicating the enum item descriptions etc.
@ -0,0 +250,4 @@};static const EnumPropertyItem grid_type_items[] = {{CD_PROP_FLOAT, "FLOAT", 0, "Float", "Floating-point value"},I think it's more correct to use socket types instead of custom data type here.
Thanks for the reminder! Yeah, they make much more sense here.
Looks good to me.
Low priority: We should eventually try to be consistent with how we do dispatching to static types: eCustomDatatype, VolumeGridType, CPPType, OpenVDB's internal type names, can all be used for the purpose.
@blender-bot build