Initial commit

pcb_to_stl.py

@@ -0,0 +1,84 @@
+import bpy
+import sys
+import os
+
+# --- Parse Arguments ---
+# structure: [..., 'input.svg', 'output.stl', 'thickness', 'width']
+try:
+    argv = sys.argv
+    argv = argv[argv.index("--") + 1:]
+    
+    input_svg = argv[0]
+    output_stl = argv[1]
+    thickness_mm = float(argv[2])
+    target_width_mm = float(argv[3])
+except (ValueError, IndexError) as e:
+    print(f"Error parsing arguments: {e}")
+    sys.exit(1)
+
+# --- Step 1: Clean & Setup Units ---
+bpy.ops.wm.read_factory_settings(use_empty=True)
+
+scene = bpy.context.scene
+scene.unit_settings.system = 'METRIC'
+scene.unit_settings.length_unit = 'MILLIMETERS'
+# This scale allows us to work in mm directly (1.0 = 1mm)
+scene.unit_settings.scale_length = 0.001 
+
+# --- Step 2: Import SVG ---
+if not os.path.exists(input_svg):
+    print(f"FATAL: File not found: {input_svg}")
+    sys.exit(1)
+
+bpy.ops.import_curve.svg(filepath=input_svg)
+
+# --- Step 3: Geometry Processing ---
+bpy.ops.object.select_all(action='SELECT')
+
+if bpy.context.selected_objects:
+    # Set active object
+    bpy.context.view_layer.objects.active = bpy.context.selected_objects[0]
+    
+    # 1. Join all parts into one
+    bpy.ops.object.join()
+    obj = bpy.context.active_object
+
+    # 2. Convert to Mesh (Flat 2D)
+    bpy.ops.object.convert(target='MESH')
+
+    # --- Step 3.5: RESIZE TO TARGET WIDTH (MM) ---
+    if target_width_mm > 0:
+        # Get current width (X dimension)
+        current_width = obj.dimensions.x
+        
+        if current_width > 0.000001:
+            scale_factor = target_width_mm / current_width
+            print(f"Resizing: {current_width:.2f}mm -> {target_width_mm:.2f}mm (Factor: {scale_factor:.4f})")
+            
+            # Apply Scale to X and Y (Maintain Aspect Ratio)
+            # We do NOT scale Z because Z is 0 (flat mesh)
+            obj.scale[0] = scale_factor
+            obj.scale[1] = scale_factor
+            
+            # Freeze the scale transformation so dimensions are real
+            bpy.ops.object.transform_apply(location=False, rotation=False, scale=True)
+        else:
+            print("Warning: Object has 0 width, skipping resize.")
+
+    # 3. Extrude (Z-Height)
+    # Now that X/Y are sized correctly, we extrude Z
+    bpy.ops.object.mode_set(mode='EDIT')
+    bpy.ops.mesh.select_all(action='SELECT')
+    
+    # Extrude exactly the thickness value
+    bpy.ops.mesh.extrude_region_move(TRANSFORM_OT_translate={"value":(0, 0, thickness_mm)}) 
+
+    bpy.ops.object.mode_set(mode='OBJECT')
+
+    # --- Step 4: Export STL ---
+    print(f"Exporting to: {output_stl}")
+    bpy.ops.wm.stl_export(filepath=output_stl, global_scale=1.0)
+    
+else:
+    print("Error: No objects found in SVG.")
+    sys.exit(1)