From 4b75ecb80357f7cbc5fb3ab89245e18c74946dce Mon Sep 17 00:00:00 2001
From: Nicolas Predella <nicolas@predella.me>
Date: Thu, 30 Jul 2026 14:51:57 +0300
Subject: [PATCH] translation

---
 core/nodeslicer/nodes/mesh.py    | 15 ++++++++++++++-
 core/nodeslicer/nodes/path.py    |  1 +
 core/nodeslicer/nodes/preview.py | 12 ++----------
 core/slice.py                    |  2 ++
 doc/NODES.md                     |  6 ++++--
 5 files changed, 23 insertions(+), 13 deletions(-)

diff --git a/core/nodeslicer/nodes/mesh.py b/core/nodeslicer/nodes/mesh.py
index 9b0c750..245866a 100644
--- a/core/nodeslicer/nodes/mesh.py
+++ b/core/nodeslicer/nodes/mesh.py
@@ -512,8 +512,21 @@ class SLICENODE_DropGeometry(SliceNode):
         self.add_input("SLICESOCK_Mesh", "Mesh")
         self.add_input("SLICESOCK_Float", "Z")
         self.add_output("SLICESOCK_Mesh", "Mesh")
+        self.add_output("SLICESOCK_VectorRo", "Translation")
 
-    def evaluate_output(self, socket_name: str, **_kwargs) -> SlicingCollection | SlicingGroup | None:
+    def evaluate_output(self, socket_name: str, **_kwargs) -> SlicingCollection | SlicingGroup | tuple[float, float, float] | None:
+        if socket_name == "Translation":
+            mesh_data: SlicingCollection | SlicingGroup | None = self.resolve("Mesh")
+            if not mesh_data:
+                return None
+            z = self.resolve('Z')
+            if z is None:
+                z = 0.0
+            assert mesh_data.min_z is not None
+            min_z = round(mesh_data.min_z, 6)
+            offset_z = float(z - min_z)
+            return (0.0, 0.0, offset_z)
+        
         if socket_name != "Mesh":
             return None
 
diff --git a/core/nodeslicer/nodes/path.py b/core/nodeslicer/nodes/path.py
index 421dd6b..93a1bc6 100644
--- a/core/nodeslicer/nodes/path.py
+++ b/core/nodeslicer/nodes/path.py
@@ -342,6 +342,7 @@ class SLICENODE_Infill(SliceNode):
         items=[
             ('GRID', "Grid", "Cross-hatch grid"),
             ('RECTILINEAR', "Rectilinear", "Alternating parallel lines"),
+            ('LINES', "Lines", "Parallel lines in one direction"),
         ],
         default='GRID',
         update=notify_tree_changed
diff --git a/core/nodeslicer/nodes/preview.py b/core/nodeslicer/nodes/preview.py
index ef2296e..0d54e98 100644
--- a/core/nodeslicer/nodes/preview.py
+++ b/core/nodeslicer/nodes/preview.py
@@ -314,17 +314,9 @@ class SLICENODE_GcodeToMesh(ExecSliceNode):
         if not base_mesh_name:
             base_mesh_name = "GcodePreview"
 
-        # Filter out empty inputs but keep structure to index properly
-        valid_gcodes = [g for g in gcodes if g]
+        for i, gcode in enumerate(gcodes):
+            if not gcode: continue
 
-        if not valid_gcodes:
-            if base_mesh_name in bpy.data.objects:
-                obj = bpy.data.objects[base_mesh_name]
-                if obj.type == 'MESH':
-                    obj.data.clear_geometry()
-            return 'empty'
-
-        for i, gcode in enumerate(valid_gcodes):
             mesh_name = base_mesh_name if i == 0 else f"{base_mesh_name}_{i+1}"
             try:
                 self._process_gcode(gcode, mesh_name, operator)
diff --git a/core/slice.py b/core/slice.py
index fe6d6aa..2f0022a 100644
--- a/core/slice.py
+++ b/core/slice.py
@@ -1495,6 +1495,8 @@ def infill_slice(slice_paths: 'SlicePaths', density: float, rotation_deg: float
             current_grid_paths = vertical_lines + horizontal_lines
         elif infill_type == 'RECTILINEAR':
             current_grid_paths = vertical_lines if layer_idx % 2 == 0 else horizontal_lines
+        elif infill_type == 'LINES':
+            current_grid_paths = vertical_lines
         else:
             current_grid_paths = []
 
diff --git a/doc/NODES.md b/doc/NODES.md
index 65f15a2..370b759 100644
--- a/doc/NODES.md
+++ b/doc/NODES.md
@@ -68,9 +68,11 @@ All nodes are found in the **Add (Shift+A)** menu under the **SliceNodes** categ
     - **Translation**: 3D vector specifying the translation offset.
     - **Rotation**: 3D vector/Euler rotation values.
     - **Scale**: 3D vector specifying scaling factors along the X, Y, and Z axes (defaults to `1.0, 1.0, 1.0`).
-- **Drop Geometry**: Moves a `SlicingCollection` or `SlicingGroup` along Z so that its minimum Z sits at the specified value.
+- **Drop Geometry**: Moves a `SlicingCollection` or `SlicingGroup` along Z so that its minimum Z sits at the specified value. Outputs both the dropped geometry and the translation vector.
     - **Mesh**: Input mesh data.
     - **Z**: Target minimum Z coordinate (defaults to `0.0`).
+    - **Mesh**: Output dropped mesh data.
+    - **Translation**: Output translation vector (X, Y, Z) applied to the geometry.
 - **Get Paths**: Extracts existing edges from a mesh as paths.
     - **Extrusion Multiplier Attribute**: Mesh attribute to use for per-segment extrusion rates.
     - **Feedrate Attribute**: Mesh attribute to use for per-segment feedrates.
@@ -92,7 +94,7 @@ All nodes are found in the **Add (Shift+A)** menu under the **SliceNodes** categ
     - **Distance**: The offset distance (positive for left side, negative for right side).
     - **Rotation**: Optional Euler rotation for non-planar offsetting.
 - **Infill**: Generates a cross-hatch grid or parallel lines clipped by boundary paths. 
-    - **Infill Type**: Switch between **Grid** (cross-hatch) and **Rectilinear** (alternating parallel lines).
+    - **Infill Type**: Switch between **Grid** (cross-hatch), **Rectilinear** (alternating parallel lines), and **Lines** (parallel lines in one direction).
     - **Density**: Distance between lines in units.
     - **Infill Rotation**: Base rotation of the infill pattern.
     - **Layer Rotation**: Rotation of the entire slice to align infill with specific planes.