Add simulation decorator

api/static/simulation.py

@@ -0,0 +1,25 @@
+import inspect
+import typing
+
+class SimulationInput:
+    class DeltaTime: pass
+    class ElapsedTime: pass
+
+def simulation(block: typing.Callable[typing.Any, 'Geometry']):
+    """
+    Create a simulation input/output block.
+
+    > Only available in the `geometry-node-simulation` branch of Blender 3.5.
+    """
+    def wrapped(geometry: 'Geometry', *args, **kwargs):
+        from geometry_script import simulation_input, simulation_output
+        simulation_in = simulation_input(geometry=geometry)
+        signature = inspect.signature(block)
+        for key, value in signature.parameters.items():
+            match value.annotation:
+                case SimulationInput.DeltaTime:
+                    kwargs[key] = simulation_in.delta_time
+                case SimulationInput.ElapsedTime:
+                    kwargs[key] = simulation_in.elapsed_time
+        return simulation_output(geometry=block(simulation_in.geometry, *args, **kwargs)).geometry
+    return wrapped