initial working file

This file works as a standalone addon, but it is rather cluncky.

__init__.py

@@ -0,0 +1,118 @@
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTIBILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+# This addon was created with the Serpens - Visual Scripting Addon.
+# This code is generated from nodes and is not intended for manual editing.
+# You can find out more about Serpens at <https://blendermarket.com/products/serpens>.
+
+
+bl_info = {
+    "name": "GN Simulation add-on",
+    "description": "Use GeoNodes to perform simulations by passing data between frames",
+    "author": "Zeus",
+    "version": (1, 0, 0),
+    "blender": (3, 0, 0),
+    "location": "",
+    "warning": "",
+    "wiki_url": "",
+    "tracker_url": "",
+    "category": "3D View"
+}
+
+
+###############   IMPORTS
+import bpy
+from bpy.utils import previews
+import os
+import math  
+from bpy.app.handlers import frame_change_post
+
+###############   IMPERATIVE CODE
+###############   EVALUATED CODE
+#######   Easy Fog add-on
+
+class runSim(bpy.types.Operator):
+    bl_idname = "object.runsim"
+    bl_label = "GNSim"
+    bl_description = ""
+    bl_options = {"REGISTER", "UNDO"}
+
+
+    @classmethod
+    def poll(cls, context):
+        return True
+
+    def execute(self, context):
+
+        frame_change_post.append(self.simulation)
+        bpy.ops.screen.animation_play()
+
+        return {"FINISHED"}
+
+    def step(self,context, ob):
+        depsgraph = context.evaluated_depsgraph_get()
+        old_mesh = ob.data
+        ob.data = bpy.data.meshes.new_from_object(ob.evaluated_get(depsgraph))
+        bpy.data.meshes.remove(old_mesh)
+
+    def simulation(self,scene,ob):    
+        context = bpy.context
+        ob_sim = bpy.data.objects.get("Sim")
+        self.step(context, ob_sim)
+
+class resetSim(bpy.types.Operator):
+    bl_idname = "object.resetsim"
+    bl_label = "GNSim_reset"
+    bl_description = ""
+    bl_options = {"REGISTER", "UNDO"}
+
+
+    @classmethod
+    def poll(cls, context):
+        return True
+
+    def execute(self, context):
+        frame_change_post.clear()   
+        ob_base = bpy.data.objects.get("Base")
+        ob_sim = bpy.data.objects.get("Sim")
+        ob_sim.data = bpy.data.meshes.new_from_object(ob_base)
+
+        return {"FINISHED"}
+
+
+class Sim_PT_Panel(bpy.types.Panel):
+    bl_label = "Geometry Nodes Simulation"
+    bl_idname = "GNSim_PT_Panel"
+    bl_space_type = "VIEW_3D"
+    bl_region_type = "UI"
+    bl_category = 'GN simulation'
+    bl_order = 0
+    bl_info = ""
+
+    def draw(self, context):
+        layout = self.layout
+        layout.operator(operator=runSim.bl_idname, text="Run Simulation")
+        layout.operator(operator=resetSim.bl_idname, text="Reset Simulation")
+
+
+###############   REGISTER ADDON
+def register():
+    bpy.utils.register_class(Sim_PT_Panel)
+    bpy.utils.register_class(runSim)
+    bpy.utils.register_class(resetSim)
+
+###############   UNREGISTER ADDON
+def unregister():
+    bpy.utils.unregister_class(Sim_PT_Panel)
+    bpy.utils.unregister_class(runSim)
+    bpy.utils.unregister_class(resetSim)