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"""
Dependency graph: Iterate over all object instances
+++++++++++++++++++++++++++++++++++++++++++++++++++
Sometimes it is needed to know all the instances with their matrices (for example, when writing an
exporter or a custom render engine).
This example shows how to access all objects and instances in the scene.
"""
import bpy
class OBJECT_OT_object_instances(bpy.types.Operator):
"""Access original object and do something with it"""
bl_label = "DEG Iterate Object Instances"
bl_idname = "object.object_instances"
def execute(self, context):
depsgraph = context.evaluated_depsgraph_get()
for object_instance in depsgraph.object_instances:
# This is an object which is being instanced.
object = object_instance.object
# `is_instance` denotes whether the object is coming from instances (as an opposite of
# being an emitting object. )
if not object_instance.is_instance:
print(f"Object {object.name} at {object_instance.matrix_world}")
else:
# Instanced will additionally have fields like uv, random_id and others which are
# specific for instances. See Python API for DepsgraphObjectInstance for details,
print(f"Instance of {object.name} at {object_instance.matrix_world}")
return {'FINISHED'}
def register():
bpy.utils.register_class(OBJECT_OT_object_instances)
def unregister():
bpy.utils.unregister_class(OBJECT_OT_object_instances)
if __name__ == "__main__":
register()
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