up

README.md

@@ -33,7 +33,7 @@ NodeSlicer is a high-performance Blender extension that provides a custom node-b
 4. **Process**:
     *   Add perimeters with **Buffer Shells**.
     *   Add internal structure with the **Infill** node.
-    *   Combine or modify paths using **Join Paths** or **Join Slices**.
+    *   Combine or modify paths using **Join Paths** or **Boolean Paths**.
 5. **Generate**: Convert paths to G-code using **Paths to Gcode**.
 6. **Export & Preview**: Use **Gcode To File** to save the result, and **Gcode to Preview Mesh** to visualize the final toolpaths in the viewport.
 

core/nodeslicer/nodes/path.py

@@ -234,7 +234,7 @@ class SLICENODE_Infill(SliceNode):
 
 @register_class
 class SLICENODE_JoinSlices(SliceNodeJoiner):
-    bl_label = "Join Slices"
+    bl_label = "Boolean Paths"
     socket_type = "SLICESOCK_Paths"
 
     operation: NfEnumProperty(
@@ -270,6 +270,8 @@ class SLICENODE_JoinSlices(SliceNodeJoiner):
             # We return a new SlicePaths from the result.
             accumulated = accumulated.boolean(current, self.operation)
 
+            pass
+
         return accumulated
 
 @register_class

core/slice.py

@@ -103,10 +103,7 @@ class SlicePaths(list[np.ndarray]):
         return new_paths
 
     def boolean(self, other: SlicePaths, operation: str = 'UNION') -> SlicePaths:
-        """Performs a 2D boolean operation with another set of paths."""
+        return boolean_slice(self, other, operation)
-        res = boolean_slice(self, other, operation)
-        # Boolean operations merge paths across layers, so we don't preserve original grouping as precisely.
-        return self.copy_with(res)
 
     def extend_with_groups(self, other: SlicePaths | list[np.ndarray]):
         if isinstance(other, SlicePaths):
@@ -315,7 +312,7 @@ def segments_to_slice(segments: np.ndarray) -> list[np.ndarray]:
     return res
 
 @ndarray_lru_cache(maxsize=128)
-def boolean_slice(subject: list[np.ndarray], object: list[np.ndarray], operation: str = 'UNION') -> list[np.ndarray]:
+def boolean_slice(subject: SlicePaths, object: SlicePaths, operation: str = 'UNION') -> SlicePaths:
     all_z_keys: set[int] = set()
     subject_dict: dict[int, list[np.ndarray]] = {}
     object_dict: dict[int, list[np.ndarray]] = {}
@@ -330,9 +327,10 @@ def boolean_slice(subject: list[np.ndarray], object: list[np.ndarray], operation
         all_z_keys.add(z)
         object_dict.setdefault(z, []).append(s)
 
-    results: list[np.ndarray] = []
+    results: SlicePaths = SlicePaths()
 
-    for k in all_z_keys:
+    group = 0
+    for k in sorted(all_z_keys):
         subject_slices = subject_dict.get(k)
         object_slices = object_dict.get(k)
 
@@ -372,11 +370,17 @@ def boolean_slice(subject: list[np.ndarray], object: list[np.ndarray], operation
         solution = pc.Execute(op_type, pyclipper.PFT_EVENODD, pyclipper.PFT_EVENODD) # pyright: ignore[reportAttributeAccessIssue]
         
         for path in solution:
-            if not path: continue
+            if not path:
+                continue
             fpath = np.array(path) / SCALE
             fpath_3d = np.column_stack([fpath, np.full(len(fpath), z)])
             fpath_3d = np.vstack([fpath_3d, fpath_3d[0]])
             results.append(fpath_3d)
+        
+        results.groups += [group] * len(solution)
+        group +=1 
+        
+        pass
             
     return results
 

uv.lock

@@ -6,6 +6,12 @@ resolution-markers = [
     "python_full_version < '3.11'",
 ]
 
+[[package]]
+name = "euclid3"
+version = "0.1"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/fc/d2/80730bee6b51f2a0faacaec51abb919f144c8b1fff5907fe019ec0e95698/euclid3-0.01.tar.gz", hash = "sha256:25b827a57adbfd9a3fa8625e43abc3e907f61de622343e7e538482ef9b46fd0b", size = 13201, upload-time = "2014-05-14T10:51:19.907Z" }
+
 [[package]]
 name = "fake-bpy-module"
 version = "20260317"
@@ -20,21 +26,25 @@ name = "nodeslicer"
 version = "0.1.0"
 source = { virtual = "." }
 dependencies = [
+    { name = "euclid3" },
     { name = "fake-bpy-module" },
     { name = "numpy", version = "2.2.6", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version < '3.11'" },
     { name = "numpy", version = "2.4.3", source = { registry = "https://pypi.org/simple" }, marker = "python_full_version >= '3.11'" },
     { name = "pyclipper" },
     { name = "python-libnest2d" },
     { name = "shapely" },
+    { name = "shapely-polyskel" },
 ]
 
 [package.metadata]
 requires-dist = [
+    { name = "euclid3", specifier = ">=0.1" },
     { name = "fake-bpy-module", specifier = ">=20260317" },
     { name = "numpy", specifier = ">=2.2.6" },
     { name = "pyclipper", specifier = ">=1.4.0" },
     { name = "python-libnest2d", specifier = ">=0.1.3" },
     { name = "shapely", specifier = ">=2.1.2" },
+    { name = "shapely-polyskel", specifier = ">=0.1.2" },
 ]
 
 [[package]]
@@ -309,3 +319,16 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/b1/f7/b3d1d6d18ebf55236eec1c681ce5e665742aab3c0b7b232720a7d43df7b6/shapely-2.1.2-cp314-cp314t-win32.whl", hash = "sha256:b54df60f1fbdecc8ebc2c5b11870461a6417b3d617f555e5033f1505d36e5735", size = 1602607, upload-time = "2025-09-24T13:51:37.757Z" },
     { url = "https://files.pythonhosted.org/packages/9a/f6/f09272a71976dfc138129b8faf435d064a811ae2f708cb147dccdf7aacdb/shapely-2.1.2-cp314-cp314t-win_amd64.whl", hash = "sha256:0036ac886e0923417932c2e6369b6c52e38e0ff5d9120b90eef5cd9a5fc5cae9", size = 1796682, upload-time = "2025-09-24T13:51:39.233Z" },
 ]
+
+[[package]]
+name = "shapely-polyskel"
+version = "0.1.2"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "euclid3" },
+    { name = "shapely" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/d3/d4/c88f0e2b1919ec1109a0ca2b06bbc6b5183cda46dfced90829c60b7f5331/shapely_polyskel-0.1.2.tar.gz", hash = "sha256:a615f5d7caa16e25be0e0dd609ece9ddde025fd737570286d0f00a7f9470d3bd", size = 17637, upload-time = "2025-01-05T19:43:39.121Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/b5/01/90d3f3f93990aed34e49fa5071a842f76a5dfc2fdcb026f44a5115c9d969/shapely_polyskel-0.1.2-py3-none-any.whl", hash = "sha256:827400d0d733a41ca7cea40141aa2563d4c709f53feb42d54ccfd436b5cab1bc", size = 14418, upload-time = "2025-01-05T19:43:35.529Z" },
+]