feat: We did it, GeoNodes node w/live update!

We also implemented the TriMesh node, and established a strong
convention for updating nodes from sockets via. socket superclass
method. `trigger_updates`. It should be triggered as the
`update=` callback on **ALL PROPERTIES IN ALL SOCKETS**. This
method in turn calls the nodal `update()` function, which in turn
causes the node to chain-update all nodes linked to any output socket.

By default, `update()` is `pass`, so performance shouldn't be a concern,
but we should think about this deeper at some point.

Because update-chaining is done, we're ready for preview toggles on
node outputs. A lot of exciting things to do now!

blender_maxwell/node_trees/maxwell_sim_nodes/contracts.py

@@ -450,6 +450,41 @@ SocketType_to_color = {
 	SocketType.MaxwellSimGridAxis: (0.4, 0.3, 0.25, 1.0),  # Darkest Gold
 }
 
+BLNodeSocket_to_SocketType = {
+	"NodeSocketBool": SocketType.Bool,
+	"NodeSocketCollection": SocketType.BlenderCollection,
+	"NodeSocketColor": SocketType.Real3DVector,
+	"NodeSocketFloat": SocketType.RealNumber,
+	"NodeSocketFloatAngle": SocketType.RealNumber,
+	"NodeSocketFloatDistance": SocketType.RealNumber,
+	"NodeSocketFloatFactor": SocketType.RealNumber,
+	"NodeSocketFloatPercentage": SocketType.RealNumber,
+	"NodeSocketFloatTime": SocketType.RealNumber,
+	"NodeSocketFloatTimeAbsolute": SocketType.RealNumber,
+	"NodeSocketFloatUnsigned": SocketType.RealNumber,
+	"NodeSocketGeometry": SocketType.Any,
+	"NodeSocketImage": SocketType.BlenderImage,
+	"NodeSocketInt": SocketType.IntegerNumber,
+	"NodeSocketIntFactor": SocketType.IntegerNumber,
+	"NodeSocketIntPercentage": SocketType.IntegerNumber,
+	"NodeSocketIntUnsigned": SocketType.IntegerNumber,
+	"NodeSocketMaterial": SocketType.Any,
+	"NodeSocketObject": SocketType.BlenderObject,
+	"NodeSocketRotation": SocketType.Real3DVector,
+	"NodeSocketShader": SocketType.Any,
+	"NodeSocketStandard": SocketType.Any,
+	"NodeSocketString": SocketType.Text,
+	"NodeSocketTexture": SocketType.Any,
+	"NodeSocketVector": SocketType.Real3DVector,
+	"NodeSocketVectorAcceleration": SocketType.Real3DVector,
+	"NodeSocketVectorDirection": SocketType.Real3DVector,
+	"NodeSocketVectorEuler": SocketType.Real3DVector,
+	"NodeSocketVectorTranslation": SocketType.Real3DVector,
+	"NodeSocketVectorVelocity": SocketType.Real3DVector,
+	"NodeSocketVectorXYZ": SocketType.Real3DVector,
+	"NodeSocketVirtual": SocketType.Any,
+}
+
 ####################
 # - Node Types
 ####################

blender_maxwell/node_trees/maxwell_sim_nodes/nodes/base.py

@@ -155,11 +155,6 @@ class MaxwellSimTreeNode(bpy.types.Node):
 		
 		# Declare Node Property: 'preset' EnumProperty
 		if hasattr(cls, "input_socket_sets") or hasattr(cls, "output_socket_sets"):
-			if not hasattr(cls, "input_socket_sets"):
-				cls.input_socket_sets = {}
-			if not hasattr(cls, "output_socket_sets"):
-				cls.output_socket_sets = {}
-			
 			socket_set_keys = [
 				input_socket_set_key
 				for input_socket_set_key in cls.input_socket_sets.keys()
@@ -188,6 +183,11 @@ class MaxwellSimTreeNode(bpy.types.Node):
 				default=socket_set_keys[0]
 			)
 		
+		if not hasattr(cls, "input_socket_sets"):
+			cls.input_socket_sets = {}
+		if not hasattr(cls, "output_socket_sets"):
+			cls.output_socket_sets = {}
+		
 		# Declare Node Property: 'preset' EnumProperty
 		if hasattr(cls, "presets"):
 			first_preset = list(cls.presets.keys())[0]
@@ -292,6 +292,18 @@ class MaxwellSimTreeNode(bpy.types.Node):
 		
 		return ntree.bl_idname == contracts.TreeType.MaxwellSim.value
 	
+	def update(self) -> None:
+		"""Called when some node properties (ex. links) change,
+		and/or by custom code."""
+		if hasattr(self, "update_cb"):
+			self.update_cb()
+	
+		for bl_socket in self.outputs:
+			if bl_socket.is_linked:
+				for node_link in bl_socket.links:
+					linked_node = node_link.to_node
+					linked_node.update()
+		
 	def _update_socket(self):
 		if not hasattr(self, "socket_set"):
 			raise ValueError("no socket")
@@ -379,7 +391,7 @@ class MaxwellSimTreeNode(bpy.types.Node):
 			
 			return self.inputs[self.input_sockets[input_socket_name].label]
 		
-		elif hasattr(self, "input_socket_sets"):
+		elif hasattr(self, "socket_set"):
 			# You're on your own, chump
 			
 			return self.inputs[next(
@@ -412,7 +424,7 @@ class MaxwellSimTreeNode(bpy.types.Node):
 			
 			return self.outputs[self.output_sockets[output_socket_name].label]
 		
-		elif hasattr(self, "input_socket_sets"):
+		elif hasattr(self, "socket_set"):
 			return self.outputs[next(
 				socket_def.label
 				for socket_set, socket_dict in self.input_socket_sets.items()
@@ -424,7 +436,7 @@ class MaxwellSimTreeNode(bpy.types.Node):
 		self,
 		output_bl_socket_name: contracts.BLSocketName,
 	) -> contracts.SocketName:
-		if hasattr(self, "output_socket_sets"):
+		if hasattr(self, "socket_set"):
 			return next(
 				socket_name
 				for socket_set, socket_dict in self.output_socket_sets.items()

blender_maxwell/node_trees/maxwell_sim_nodes/nodes/structures/geonodes_structure.py

@@ -1,5 +1,177 @@
+import tidy3d as td
+import numpy as np
+import sympy as sp
+import sympy.physics.units as spu
+
+import bpy
+import bmesh
+
+from ... import contracts
+from ... import sockets
+from .. import base
+
+GEONODES_MODIFIER_NAME = "BLMaxwell_GeoNodes"
+
+class GeoNodesStructureNode(base.MaxwellSimTreeNode):
+	node_type = contracts.NodeType.GeoNodesStructure
+	bl_label = "GeoNodes Structure"
+	#bl_icon = ...
+	
+	####################
+	# - Sockets
+	####################
+	input_sockets = {
+		"medium": sockets.MaxwellMediumSocketDef(
+			label="Medium",
+		),
+		"object": sockets.BlenderObjectSocketDef(
+			label="Object",
+		),
+		"geo_nodes": sockets.BlenderGeoNodesSocketDef(
+			label="GeoNodes",
+		),
+	}
+	output_sockets = {
+		"structure": sockets.MaxwellStructureSocketDef(
+			label="Structure",
+		),
+	}
+	
+	####################
+	# - Output Socket Computation
+	####################
+	@base.computes_output_socket("structure")
+	def compute_simulation(self: contracts.NodeTypeProtocol) -> td.TriangleMesh:
+		# Extract the Blender Object
+		bl_object = self.compute_input("object")
+		
+		# Ensure Updated Geometry
+		bpy.context.view_layer.update()
+		
+		# Triangulate Object Mesh
+		bmesh_mesh = bmesh.new()
+		bmesh_mesh.from_mesh(bl_object.data)
+		bmesh.ops.triangulate(bmesh_mesh, faces=bmesh_mesh.faces)
+		
+		mesh = bpy.data.meshes.new(name="TriangulatedMesh")
+		bmesh_mesh.to_mesh(mesh)
+		bmesh_mesh.free()
+		
+		# Extract Vertices and Faces
+		vertices = np.array([vert.co for vert in mesh.vertices])
+		faces = np.array([
+			[vert for vert in poly.vertices]
+			for poly in mesh.polygons
+		])
+		
+		# Remove Temporary Mesh
+		bpy.data.meshes.remove(mesh)
+		
+		return td.Structure(
+			geometry=td.TriangleMesh.from_vertices_faces(vertices, faces),
+			medium=self.compute_input("medium")
+		)
+	
+	####################
+	# - Update Function
+	####################
+	def update_cb(self) -> None:
+		bl_object = self.compute_input("object")
+		if bl_object is None: return
+		
+		geo_nodes = self.compute_input("geo_nodes")
+		if geo_nodes is None: return
+		
+		bl_modifier = bl_object.modifiers.get(GEONODES_MODIFIER_NAME)
+		if bl_modifier is None: return
+		
+		# Set GeoNodes Modifier Attributes
+		for idx, interface_item in enumerate(
+			geo_nodes.interface.items_tree.values()
+		):
+			if idx == 0: continue  ## Always-on "Geometry" Input (from Object)
+			
+			bl_socket = self.inputs[
+				interface_item.name
+			]
+			if bl_socket.is_linked:
+				linked_bl_socket = bl_socket.links[0].from_socket
+				linked_bl_node = bl_socket.links[0].from_node
+				val = linked_bl_node.compute_output(
+					linked_bl_node.g_output_socket_name(
+						linked_bl_socket.name
+					)
+				)  ## What a bunch of spaghetti
+			else:
+				val = self.inputs[
+					interface_item.name
+				].default_value
+			
+			# Conservatively Set Differing Values
+			if bl_modifier[interface_item.identifier] != val:
+				bl_modifier[interface_item.identifier] = val
+			
+		# Update DepGraph
+		bl_object.data.update()
+		
+	def update_sockets_from_geonodes(self) -> None:
+		# Remove All "Loose" Sockets
+		socket_labels = {
+			socket_def.label
+			for socket_def in self.input_sockets.values()
+		} | {
+			socket_def.label
+			for socket_set_name, socket_set in self.input_socket_sets.items()
+			for socket_name, socket_def in socket_set.items()
+		}
+		bl_sockets_to_remove = {
+			bl_socket
+			for bl_socket_name, bl_socket in self.inputs.items()
+			if bl_socket_name not in socket_labels
+		}
+		
+		for bl_socket in bl_sockets_to_remove:
+			self.inputs.remove(bl_socket)
+		
+		# Query for Blender Object / Geo Nodes
+		bl_object = self.compute_input("object")
+		if bl_object is None: return
+		## TODO: Make object? Gray out geonodes if object not defined?
+		
+		geo_nodes = self.compute_input("geo_nodes")
+		if geo_nodes is None: return
+		
+		
+		# Add Non-Static Sockets from GeoNodes
+		for bl_socket_name, bl_socket in geo_nodes.interface.items_tree.items():
+			# For now, don't allow Geometry inputs.
+			if bl_socket.socket_type == "NodeSocketGeometry": continue
+			
+			self.inputs.new(
+				contracts.BLNodeSocket_to_SocketType[bl_socket.socket_type],
+				bl_socket_name,
+			)
+		
+		# Create New GeoNodes Modifier
+		if GEONODES_MODIFIER_NAME not in bl_object.modifiers:
+			modifier = bl_object.modifiers.new(
+				name=GEONODES_MODIFIER_NAME,
+				type="NODES",
+			)
+			modifier.node_group = geo_nodes
+		
+		self.update()
+
+
+
 ####################
 # - Blender Registration
 ####################
-BL_REGISTER = []
+BL_REGISTER = [
-BL_NODES = {}
+	GeoNodesStructureNode,
+]
+BL_NODES = {
+	contracts.NodeType.GeoNodesStructure: (
+		contracts.NodeCategory.MAXWELLSIM_STRUCTURES
+	)
+}

blender_maxwell/node_trees/maxwell_sim_nodes/nodes/structures/object_structure.py

@@ -1,6 +1,83 @@
+import tidy3d as td
+import numpy as np
+import sympy as sp
+import sympy.physics.units as spu
+
+import bpy
+import bmesh
+
+from ... import contracts
+from ... import sockets
+from .. import base
+
+class ObjectStructureNode(base.MaxwellSimTreeNode):
+	node_type = contracts.NodeType.ObjectStructure
+	bl_label = "Object Structure"
+	#bl_icon = ...
+	
+	####################
+	# - Sockets
+	####################
+	input_sockets = {
+		"medium": sockets.MaxwellMediumSocketDef(
+			label="Medium",
+		),
+		"object": sockets.BlenderObjectSocketDef(
+			label="Object",
+		),
+	}
+	output_sockets = {
+		"structure": sockets.MaxwellStructureSocketDef(
+			label="Structure",
+		),
+	}
+	
+	####################
+	# - Output Socket Computation
+	####################
+	@base.computes_output_socket("structure")
+	def compute_structure(self: contracts.NodeTypeProtocol) -> td.Structure:
+		# Extract the Blender Object
+		bl_object = self.compute_input("object")
+		
+		# Ensure Updated Geometry
+		bpy.context.view_layer.update()
+		
+		# Triangulate Object Mesh
+		bmesh_mesh = bmesh.new()
+		bmesh_mesh.from_mesh(bl_object.data)
+		bmesh.ops.triangulate(bmesh_mesh, faces=bmesh_mesh.faces)
+		
+		mesh = bpy.data.meshes.new(name="TriangulatedMesh")
+		bmesh_mesh.to_mesh(mesh)
+		bmesh_mesh.free()
+		
+		# Extract Vertices and Faces
+		vertices = np.array([vert.co for vert in mesh.vertices])
+		faces = np.array([
+			[vert for vert in poly.vertices]
+			for poly in mesh.polygons
+		])
+		
+		# Remove Temporary Mesh
+		bpy.data.meshes.remove(mesh)
+		
+		print(vertices)
+		return td.Structure(
+			geometry=td.TriangleMesh.from_vertices_faces(vertices, faces),
+			medium=self.compute_input("medium")
+		)
+
+
+
 ####################
 # - Blender Registration
 ####################
-BL_REGISTER = []
+BL_REGISTER = [
-BL_NODES = {}
+	ObjectStructureNode,
-
+]
+BL_NODES = {
+	contracts.NodeType.ObjectStructure: (
+		contracts.NodeCategory.MAXWELLSIM_STRUCTURES
+	)
+}

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/base.py

@@ -140,6 +140,13 @@ class BLSocket(bpy.types.NodeSocket):
 		
 		self._unit_previous = self.unit
 	
+	####################
+	# - Callback Dispatcher
+	####################
+	def trigger_updates(self) -> None:
+		if not self.is_output:
+			self.node.update()
+	
 	####################
 	# - Methods
 	####################

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/basic/bool_socket.py

@@ -25,6 +25,7 @@ class BoolBLSocket(base.BLSocket):
 		name="Boolean",
 		description="Represents a boolean",
 		default=False,
+		update=(lambda self, context: self.trigger_updates()),
 	)
 	
 	####################

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/basic/file_path_socket.py

@@ -27,6 +27,7 @@ class FilePathBLSocket(base.BLSocket):
 		description="Represents the path to a file",
 		#default="",
 		subtype="FILE_PATH",
+		update=(lambda self, context: self.trigger_updates()),
 	)
 	
 	####################

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/basic/text_socket.py

@@ -27,6 +27,7 @@ class TextBLSocket(base.BLSocket):
 		name="Text",
 		description="Represents some text",
 		default="",
+		update=(lambda self, context: self.trigger_updates()),
 	)
 	
 	####################

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/blender/collection_socket.py

@@ -1,5 +1,6 @@
 import typing as typ
 
+import bpy
 import pydantic as pyd
 
 from .. import base
@@ -12,16 +13,26 @@ class BlenderCollectionBLSocket(base.BLSocket):
 	socket_type = contracts.SocketType.BlenderCollection
 	bl_label = "BlenderCollection"
 	
+	####################
+	# - Properties
+	####################
+	raw_value: bpy.props.PointerProperty(
+		name="Blender Collection",
+		description="Represents a Blender collection",
+		type=bpy.types.Collection,
+		update=(lambda self, context: self.trigger_updates()),
+	)
+	
 	####################
 	# - Default Value
 	####################
 	@property
-	def default_value(self) -> None:
+	def default_value(self) -> bpy.types.Collection | None:
-		pass
+		return self.raw_value
 	
 	@default_value.setter
-	def default_value(self, value: typ.Any) -> None:
+	def default_value(self, value: bpy.types.Collection) -> None:
-		pass
+		self.raw_value = value
 
 ####################
 # - Socket Configuration

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/blender/geonodes_socket.py

@@ -1,5 +1,6 @@
 import typing as typ
 
+import bpy
 import pydantic as pyd
 
 from .. import base
@@ -12,16 +13,36 @@ class BlenderGeoNodesBLSocket(base.BLSocket):
 	socket_type = contracts.SocketType.BlenderGeoNodes
 	bl_label = "BlenderGeoNodes"
 	
+	####################
+	# - Properties
+	####################
+	def update_geonodes_node(self):
+		if hasattr(self.node, "update_sockets_from_geonodes"):
+			self.node.update_sockets_from_geonodes()
+		else:
+			raise ValueError("Node doesn't have GeoNodes socket update method.")
+		
+		# Run the Usual Updates
+		self.trigger_updates()
+		
+	raw_value: bpy.props.PointerProperty(
+		name="Blender GeoNodes Tree",
+		description="Represents a Blender GeoNodes Tree",
+		type=bpy.types.NodeTree,
+		poll=(lambda self, obj: obj.bl_idname == 'GeometryNodeTree'),
+		update=(lambda self, context: self.update_geonodes_node()),
+	)
+	
 	####################
 	# - Default Value
 	####################
 	@property
-	def default_value(self) -> None:
+	def default_value(self) -> bpy.types.Object | None:
-		pass
+		return self.raw_value
 	
 	@default_value.setter
-	def default_value(self, value: typ.Any) -> None:
+	def default_value(self, value: bpy.types.Object) -> None:
-		pass
+		self.raw_value = value
 
 ####################
 # - Socket Configuration

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/blender/image_socket.py

@@ -1,5 +1,6 @@
 import typing as typ
 
+import bpy
 import pydantic as pyd
 
 from .. import base

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/blender/object_socket.py

@@ -1,5 +1,6 @@
 import typing as typ
 
+import bpy
 import pydantic as pyd
 
 from .. import base
@@ -12,16 +13,26 @@ class BlenderObjectBLSocket(base.BLSocket):
 	socket_type = contracts.SocketType.BlenderObject
 	bl_label = "BlenderObject"
 	
+	####################
+	# - Properties
+	####################
+	raw_value: bpy.props.PointerProperty(
+		name="Blender Object",
+		description="Represents a Blender object",
+		type=bpy.types.Object,
+		update=(lambda self, context: self.trigger_updates()),
+	)
+	
 	####################
 	# - Default Value
 	####################
 	@property
-	def default_value(self) -> None:
+	def default_value(self) -> bpy.types.Object | None:
-		pass
+		return self.raw_value
 	
 	@default_value.setter
-	def default_value(self, value: typ.Any) -> None:
+	def default_value(self, value: bpy.types.Object) -> None:
-		pass
+		self.raw_value = value
 
 ####################
 # - Socket Configuration

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/blender/text_socket.py

@@ -1,5 +1,6 @@
 import typing as typ
 
+import bpy
 import pydantic as pyd
 
 from .. import base

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/blender/volume_socket.py

@@ -1,5 +1,6 @@
 import typing as typ
 
+import bpy
 import pydantic as pyd
 
 from .. import base

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/maxwell/medium_socket.py

@@ -23,6 +23,7 @@ class MaxwellMediumBLSocket(base.BLSocket):
 		description="Represents a simple, real permittivity.",
 		default=0.0,
 		precision=4,
+		update=(lambda self, context: self.trigger_updates()),
 	)
 	
 	####################

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/number/complex_number_socket.py

@@ -30,7 +30,8 @@ class ComplexNumberBLSocket(base.BLSocket):
 		description="Represents a complex number (real, imaginary)",
 		size=2,
 		default=(0.0, 0.0),
-		subtype='NONE'
+		subtype='NONE',
+		update=(lambda self, context: self.trigger_updates()),
 	)
 	coord_sys: bpy.props.EnumProperty(
 		name="Coordinate System",
@@ -135,6 +136,8 @@ class ComplexNumberBLSocket(base.BLSocket):
 				sp.Abs(cart_value),
 				sp.arg(cart_value) if y != 0 else 0,
 			)
+		
+		self.trigger_updates()
 
 ####################
 # - Socket Configuration

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/number/real_number_socket.py

@@ -30,6 +30,7 @@ class RealNumberBLSocket(base.BLSocket):
 		description="Represents a real number",
 		default=0.0,
 		precision=6,
+		update=(lambda self, context: self.trigger_updates()),
 	)
 	
 	####################

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/physical/accel_scalar_socket.py

@@ -22,6 +22,7 @@ class PhysicalAccelScalarBLSocket(base.BLSocket):
 		description="Represents the unitless part of the acceleration",
 		default=0.0,
 		precision=6,
+		update=(lambda self, context: self.trigger_updates()),
 	)
 	
 	####################

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/physical/angle_socket.py

@@ -22,6 +22,7 @@ class PhysicalAngleBLSocket(base.BLSocket):
 		description="Represents the unitless part of the acceleration",
 		default=0.0,
 		precision=4,
+		update=(lambda self, context: self.trigger_updates()),
 	)
 	
 	####################

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/physical/area_socket.py

@@ -32,6 +32,7 @@ class PhysicalAreaBLSocket(base.BLSocket):
 		description="Represents the unitless part of the area",
 		default=0.0,
 		precision=6,
+		update=(lambda self, context: self.trigger_updates()),
 	)
 	
 	####################

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/physical/force_scalar_socket.py

@@ -22,6 +22,7 @@ class PhysicalForceScalarBLSocket(base.BLSocket):
 		description="Represents the unitless part of the force",
 		default=0.0,
 		precision=6,
+		update=(lambda self, context: self.trigger_updates()),
 	)
 	
 	####################

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/physical/freq_socket.py

@@ -22,6 +22,7 @@ class PhysicalFreqBLSocket(base.BLSocket):
 		description="Represents the unitless part of the frequency",
 		default=0.0,
 		precision=6,
+		update=(lambda self, context: self.trigger_updates()),
 	)
 	
 	####################

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/physical/length_socket.py

@@ -22,6 +22,7 @@ class PhysicalLengthBLSocket(base.BLSocket):
 		description="Represents the unitless part of the force",
 		default=0.0,
 		precision=6,
+		update=(lambda self, context: self.trigger_updates()),
 	)
 	
 	####################

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/physical/point_3d_socket.py

@@ -33,6 +33,7 @@ class PhysicalPoint3DBLSocket(base.BLSocket):
 		size=3,
 		default=(0.0, 0.0, 0.0),
 		precision=4,
+		update=(lambda self, context: self.trigger_updates()),
 	)
 	
 	####################

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/physical/size_3d_socket.py

@@ -33,6 +33,7 @@ class PhysicalSize3DBLSocket(base.BLSocket):
 		size=3,
 		default=(1.0, 1.0, 1.0),
 		precision=4,
+		update=(lambda self, context: self.trigger_updates()),
 	)
 	
 	####################

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/physical/time_socket.py

@@ -22,6 +22,7 @@ class PhysicalTimeBLSocket(base.BLSocket):
 		description="Represents the unitless part of the force",
 		default=0.0,
 		precision=6,
+		update=(lambda self, context: self.trigger_updates()),
 	)
 	
 	####################

blender_maxwell/node_trees/maxwell_sim_nodes/sockets/physical/volume_socket.py

@@ -32,6 +32,7 @@ class PhysicalVolumeBLSocket(base.BLSocket):
 		description="Represents the unitless part of the area",
 		default=0.0,
 		precision=6,
+		update=(lambda self, context: self.trigger_updates()),
 	)
 	
 	####################

blender_maxwell/requirements.txt

@@ -2,3 +2,4 @@ tidy3d==2.5.2
 pydantic==2.6.0
 sympy==1.12
 scipy==1.12.0
+trimesh==4.1.4