better preview

README.md

@@ -35,7 +35,7 @@ NodeSlicer is a high-performance Blender extension that provides a custom node-b
     *   Add internal structure with the **Infill** node.
     *   Combine or modify paths using **Join Paths** or **Join Slices**.
 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 Mesh** to visualize the final toolpaths in the viewport.
+6. **Export & Preview**: Use **Gcode To File** to save the result, and **Gcode Preview** to visualize the final toolpaths in the viewport.
 
 ## Documentation
 

core/nodeslicer/nodes.py

@@ -8,6 +8,7 @@ from math import floor
 from pathlib import Path
 from typing import Any, TypeAlias
 import bpy
+from bpy.props import BoolProperty
 import numpy as np
 from mathutils import Euler
 from .bpy_ns_types import NfStringProperty, NfEnumProperty, NfBoolProperty
@@ -1147,7 +1148,7 @@ class SLICENODE_PrusaslicerSlice(ExecSliceNode):
     bl_label = "PrusaSlicer Slice"
     button_label = "Slice with PrusaSlicer"
 
-    prusaslicer_executable: NfStringProperty(name="PrusaSlicer Path", subtype='FILE_PATH') # pyright: ignore[reportInvalidTypeForm]
+    prusaslicer_executable: NfStringProperty(name="PrusaSlicer Path", subtype='FILE_PATH', default='flatpak run com.prusa3d.PrusaSlicer') # pyright: ignore[reportInvalidTypeForm]
     gcode_result: NfStringProperty(name="Gcode Result", default="") # pyright: ignore[reportInvalidTypeForm]
 
     def init(self, context):
@@ -1293,15 +1294,20 @@ class SLICENODE_PrusaslicerSlice(ExecSliceNode):
 
 @register_class
 class SLICENODE_GcodeToMesh(ExecSliceNode):
-    bl_label = "Gcode to Mesh"
+    bl_label = "Gcode Preview"
 
-    button_label = "Update Debug Mesh"
+    button_label = "Update Preview"
+    show_e_0: NfBoolProperty(name="Show Zero Extrusions", default=False)  # pyright: ignore[reportInvalidTypeForm]
 
     def init(self, context):
         self._init_exec()
         self.add_input("SLICESOCK_Gcode", "Gcode")
         self.add_input("SLICESOCK_String", "Name")
 
+    def draw_buttons(self, context, layout):
+        super().draw_buttons(context, layout)
+        layout.prop(self, 'show_e_0')
+
     def evaluate(self, operator=None):
         gcode: str = self.resolve("Gcode")
         mesh_name: str = self.resolve("Name")
@@ -1352,7 +1358,11 @@ class SLICENODE_GcodeToMesh(ExecSliceNode):
             new_z = params.get('Z', last_z)
             new_e = params.get('E', last_e)
 
-            if cmd == 'G1':
+            show = False
+            if self.show_e_0: show = True
+            if cmd == 'G1' and new_e > 0: show = True
+
+            if show:
                 # Subtract offsets (scaled to Blender units) to return to original space
                 ox, oy = offset_x * 0.001, offset_y * 0.001
                 segments.append((

core/nodeslicer/tree.py

@@ -185,7 +185,7 @@ class SLICENODE_MT_Menu(Menu):
         layout.operator("node.add_node", text="Gcode to File").type = "SLICENODE_GcodeToFile"
         layout.operator("node.add_node", text="Gcode to Text Block").type = "SLICENODE_GcodeToTextBlock"
         layout.operator("node.add_node", text="Start Print").type = "SLICENODE_StartPrint"
-        layout.operator("node.add_node", text="Gcode to Mesh").type = "SLICENODE_GcodeToMesh"
+        layout.operator("node.add_node", text="Gcode Preview").type = "SLICENODE_GcodeToMesh"
         layout.operator("node.add_node", text="PrusaSlicer Slice").type = "SLICENODE_PrusaslicerSlice"
         layout.operator("node.add_node", text="Executor").type = "SLICENODE_Executor"
 

doc/NODES.md

@@ -80,5 +80,5 @@ All nodes are found in the **Add (Shift+A)** menu under the **SliceNodes** categ
     - **Config**: PrusaSlicer configuration (from the **PrusaSlicer Config** node).
     - **Gcode**: Output socket providing the generated G-code string.
 - **Gcode to Text Block**: Creates a new Blender text block containing the G-code and opens it in any active text editors.
-- **Gcode to Mesh**: Decodes G-code and creates a Blender mesh ("Debug" object) for visualization. 
+- **Gcode Preview**: Decodes G-code and creates a Blender mesh ("Debug" object) for visualization. 
 - **Test**: Triggers evaluation for debugging purposes.

doc/USER_GUIDE.md

@@ -33,13 +33,11 @@ Follow these steps to generate G-code for a simple object and preview it:
 *   This node generates the raw G-code text.
 
 ### Step 4: Preview the Result
-*   Add a **Gcode to Mesh** node.
+*   Add a **Gcode Preview** node.
 *   Connect the Gcode output to it.
 *   Click the **Update Debug Mesh** button on the node.
 *   A new object named **Debug** will appear in your scene, showing the toolpaths.
 
-> **Pro Tip**: If your file contains a Geometry Nodes group called "Nonplanar Slicing Preview", it will be automatically assigned to the Debug object for a high-quality visualization.
-
 ---
 
 ## 3. Adding Perimeters and Infill

ui/panels.py

@@ -27,5 +27,6 @@ class SlicerObjectPanel(Panel, DrawCollectionMixin):
         layout.prop(pg, "object_type", text="Object type")
         layout.prop(pg, "extruder", text="Extruder")
 
+        layout.label(text="Modifiers:")
         if pg.object_type in ['ParameterModifier', 'ModelPart']:
             self.draw_collection(pg.modifiers, layout)