caching and metadata

core/nodeslicer/nodes.py

@@ -621,6 +621,29 @@ class SLICENODE_GcodeBlock(SliceNode):
     def evaluate_output(self, socket_name: str, **_kwargs) -> str:
         return self.outputs['Gcode'].value
 
+@register_class
+class SLICENODE_AssignMetadata(SliceNode):
+    bl_label = "Assign Metadata"
+
+    def init(self, context):
+        self.add_input("SLICESOCK_String", "Name")
+        self.add_input("SLICESOCK_String", "Filament Type")
+        self.add_input("SLICESOCK_String", "Printer Model")
+        self.add_output("SLICESOCK_GcodeRo", "Gcode")
+
+    def evaluate_output(self, socket_name: str, **_kwargs) -> str:
+        name = self.resolve("Name")
+        filament = self.resolve("Filament Type")
+        printer = self.resolve("Printer Model")
+        lines = []
+        if name:
+            lines.append(f'; objects_info = {{"objects": [{{"name": "{name}", "polygon": []}}]}}')
+        if filament:
+            lines.append(f'; filament_type = {filament}')
+        if printer:
+            lines.append(f'; printer_model = {printer}')
+        return '\n'.join(lines)
+
 @register_class
 class SLICENODE_GcodeHelper(SliceNode):
     bl_label = "Gcode Helper"

core/nodeslicer/tree.py

@@ -194,6 +194,7 @@ class SLICENODE_MT_Gcode(Menu):
         assert layout
         layout.operator("node.add_node", text="Paths to Gcode").type = "SLICENODE_PathsToGcode"
         layout.operator("node.add_node", text="Gcode Block").type = "SLICENODE_GcodeBlock"
+        layout.operator("node.add_node", text="Assign Metadata").type = "SLICENODE_AssignMetadata"
         layout.operator("node.add_node", text="Gcode Helper").type = "SLICENODE_GcodeHelper"
         layout.operator("node.add_node", text="Load Gcode").type = "SLICENODE_LoadGcode"
 

infra/blender/blender_slice_nodes_generic.py

@@ -9,7 +9,7 @@ from bpy.types import NodeSocket, Node
 
 class NodeException(Exception): ...
 
-_EvalCache = dict[tuple[int, str], Any]
+_EvalCache = dict[tuple[int, str, str], Any]
 
 class AutoBlIdName:
     def __init_subclass__(cls, **kwargs):
@@ -32,7 +32,9 @@ class SliceNode(Node, AutoBlIdName):
     def evaluate_output(self, socket_name: str, **_kwargs) -> Any: ...
 
     def resolve(self, fieldname) -> Any:
-        return resolve_input(self.inputs.get(fieldname))
+        cache = getattr(self, "_current_cache", None)
+        visited = getattr(self, "_current_visited", None)
+        return resolve_input(self.inputs.get(fieldname), cache=cache, visited=visited)
 
     def add_output(self, bl_idname: str, name: str = "", identifier: str = ""):
         eval_name = name or get_label_by_name(bl_idname)
@@ -48,8 +50,10 @@ class SliceNode(Node, AutoBlIdName):
         self._update_multi_inputs()
     
     def resolve_multi_input(self, fieldname) -> Any:
+        cache = getattr(self, "_current_cache", None)
+        visited = getattr(self, "_current_visited", None)
         inputs = [i for i in list(self.inputs) if i.name == fieldname]
-        return [resolve_input(r) for r in inputs]
+        return [resolve_input(r, cache=cache, visited=visited) for r in inputs]
 
     def _update_multi_inputs(self):
         if not self.get('multi_sockets'): return
@@ -81,6 +85,21 @@ class SliceNode(Node, AutoBlIdName):
     
 ## Evaluation helpers
 
+_current_execution_cache: _EvalCache | None = None
+
+@contextmanager
+def execution_cache():
+    global _current_execution_cache
+    if _current_execution_cache is not None:
+        yield _current_execution_cache
+        return
+
+    _current_execution_cache = {}
+    try:
+        yield _current_execution_cache
+    finally:
+        _current_execution_cache = None
+
 @contextmanager
 def node_execution_feedback(node: bpy.types.Node):
     # Save original color
@@ -93,6 +112,7 @@ def node_execution_feedback(node: bpy.types.Node):
     # Refresh UI
     bpy.ops.wm.redraw_timer(type='DRAW_WIN_SWAP', iterations=1)
     try:
+        with execution_cache():
             yield
     finally:
         node.use_custom_color = old_use_color
@@ -129,6 +149,11 @@ def resolve_input(
 
     assert socket.node
 
+    if cache is None:
+        cache = getattr(socket.node, "_current_cache", _current_execution_cache)
+    if visited is None:
+        visited = getattr(socket.node, "_current_visited", None)
+
     if not socket.is_linked:
         val = getattr(socket, "value", None)
         if val is not None:
@@ -153,21 +178,30 @@ def _resolve_output(
     cache: _EvalCache | None = None,
     visited: set[tuple[int, str]] | None = None,
 ):
+    if cache is None:
+        cache = _current_execution_cache
 
     cache = {} if cache is None else cache
     visited = set() if visited is None else visited
 
     assert socket.node
-    key = (socket.node.as_pointer(), socket.node.name)
+    key = (socket.node.as_pointer(), socket.node.name, socket.name)
     if key in cache: return cache[key]
-    if key in visited: return default  # cycle guard
 
-    visited.add(key)
+    node_key = (socket.node.as_pointer(), socket.node.name)
+    if node_key in visited: return default  # cycle guard
+
+    visited.add(node_key)
     try:
         with node_execution_feedback(socket.node):
             if not isinstance(socket.node, SliceNode):
                 return default
 
+            # Set these temporarily so self.resolve() can find them
+            socket.node._current_cache = cache # type: ignore
+            socket.node._current_visited = visited # type: ignore
+
+            try:
                 if getattr(socket.node, "mute", False):
                     # Attempt bypass: find a matching input socket by name or type
                     input_to_bypass = socket.node.inputs.get(socket.name)
@@ -188,4 +222,7 @@ def _resolve_output(
                 cache[key] = value
                 return value
             finally:
-        visited.remove(key)
+                if hasattr(socket.node, "_current_cache"): del socket.node._current_cache
+                if hasattr(socket.node, "_current_visited"): del socket.node._current_visited
+    finally:
+        visited.remove(node_key)

infra/networking/gcode_utils.py

@@ -52,7 +52,8 @@ def get_gcode_name_from_metadata(gcode: str, default: str = "output") -> str:
             names: list[str] = [str(v['name'].split(" id:")[0]) for v in gcode_info['objects']]
             counts = Counter(names)
             object_names = "-".join(f"{c}x{n}" if c > 1 else n for n, c in counts.items())
-            return "-".join([object_names, filament, printer])
+            parts = [object_names, filament, printer]
+            return "-".join([str(p) for p in parts if p])
         except:
             pass
     return default