How can I access the measurements displayed with the Measure Tool in Blender 2.80 from Python? I'm not seeing it anywhere in the documentation, hoping I'm just blind. Thanks.
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The data is stored in the grease pencil annotations:
bpy.data.grease_pencils["Annotations"].layers['RulerData3D']
Specifically, to get a list of all length measurements currently in the scene:
lengths = list((s.points[0].co - s.points[-1].co).length for s in bpy.data.grease_pencils["Annotations"].layers['RulerData3D'].frames[0].strokes)