Spreadsheet: Display geometry volume component grids

This shows a geometry's volume grids in the spreadsheet.
Three columns are displayed:
 - Name: The text name of each grid
 - Data type: Float, Vector, etc.
 - Class: Fog volume, Level Set, or unkown

In the future, values of the voxels themselves could be displayed,
but that is a much more complex problem, with important performance
implications, etc.

Differential Revision: https://developer.blender.org/D13049

1 files changed, 20 insertions, 0 deletions

diff --git a/source/blender/editors/space_spreadsheet/spreadsheet_data_source_geometry.hh b/source/blender/editors/space_spreadsheet/spreadsheet_data_source_geometry.hh
index 6c88a94f585..a4114dd1f6a 100644
--- a/source/blender/editors/space_spreadsheet/spreadsheet_data_source_geometry.hh
+++ b/source/blender/editors/space_spreadsheet/spreadsheet_data_source_geometry.hh
@@ -116,6 +116,26 @@ class InstancesDataSource : public DataSource {
   int tot_rows() const override;
 };
 
+class VolumeDataSource : public DataSource {
+  const GeometrySet geometry_set_;
+  const VolumeComponent *component_;
+
+ public:
+  VolumeDataSource(GeometrySet geometry_set)
+      : geometry_set_(std::move(geometry_set)),
+        component_(geometry_set_.get_component_for_read<VolumeComponent>())
+  {
+  }
+
+  void foreach_default_column_ids(
+      FunctionRef<void(const SpreadsheetColumnID &, bool is_extra)> fn) const override;
+
+  std::unique_ptr<ColumnValues> get_column_values(
+      const SpreadsheetColumnID &column_id) const override;
+
+  int tot_rows() const override;
+};
+
 std::unique_ptr<DataSource> data_source_from_geometry(const bContext *C, Object *object_eval);
 
 }  // namespace blender::ed::spreadsheet