add skin to ui for project curve to surface

add limit curve the ui for waterline as it works there aswell
also fix waterline skin thickness in the z direction by moving the slice
line down by the skin thickness.

scripts/addons/cam/gcode_path.py

@@ -901,7 +901,8 @@ async def get_path_3_axis(context, operation):
         for h in range(0, nslices):
             layerstepinc += 1
             slicechunks = []
-            z = o.min_z + h * o.slice_detail
+            # lower the layer by the skin value so the slice gets done at the tip of the tool
+            z = o.min_z + h * o.slice_detail - o.skin
             if h == 0:
                 z += 0.0000001
                 # if people do mill flat areas, this helps to reach those...
@@ -915,7 +916,7 @@ async def get_path_3_axis(context, operation):
 
             for p in slicepolys.geoms:
                 poly = poly.union(p)  # polygversion TODO: why is this added?
-                nchunks = shapely_to_chunks(p, z)
+                nchunks = shapely_to_chunks(p, z + o.skin)
                 nchunks = limit_chunks(nchunks, o, force=True)
                 lastchunks.extend(nchunks)
                 slicechunks.extend(nchunks)
@@ -951,7 +952,7 @@ async def get_path_3_axis(context, operation):
                     fillz = z
                     i = 0
                     while not restpoly.is_empty:
-                        nchunks = shapely_to_chunks(restpoly, fillz)
+                        nchunks = shapely_to_chunks(restpoly, fillz + o.skin)
                         # project paths TODO: path projection during waterline is not working
                         if o.waterline_project:
                             nchunks = chunks_refine(nchunks, o)
@@ -993,7 +994,7 @@ async def get_path_3_axis(context, operation):
                     # 'GeometryCollection':#len(restpoly.boundary.coords)>0:
                     while not restpoly.is_empty:
                         # print(i)
-                        nchunks = shapely_to_chunks(restpoly, fillz)
+                        nchunks = shapely_to_chunks(restpoly, fillz + o.skin)
                         #########################
                         nchunks = limit_chunks(nchunks, o, force=True)
                         slicechunks.extend(nchunks)

scripts/addons/cam/ui/panels/area_panel.py

@@ -100,7 +100,7 @@ class CAM_AREA_Panel(CAMParentPanel, Panel):
 
         # Draw Limit Curve
         if self.level >= 1:
-            if self.op.strategy in ["BLOCK", "SPIRAL", "CIRCLES", "PARALLEL", "CROSS"]:
+            if self.op.strategy in ["BLOCK", "SPIRAL", "CIRCLES", "PARALLEL", "CROSS", "WATERLINE"]:
                 main.use_property_split = False
                 col = main.column(align=False)
                 header, panel = col.panel("limit", default_closed=True)

scripts/addons/cam/ui/panels/op_properties_panel.py

@@ -125,6 +125,7 @@ class CAM_OPERATION_PROPERTIES_Panel(CAMParentPanel, Panel):
         if self.op.strategy in ["CARVE"]:
             col = box.column(align=True)
             col.prop(self.op, "carve_depth", text="Depth")
+            col.prop(self.op, "skin")
             box = col.box()
             sub = box.column(align=True)
             sub.label(text="Toolpath Distance")
@@ -192,6 +193,7 @@ class CAM_OPERATION_PROPERTIES_Panel(CAMParentPanel, Panel):
             row.use_property_split = False
             row.prop(self.op, "inverse")
             if self.op.strategy in ["PARALLEL", "CROSS"]:
+                col.prop(self.op, "skin")
                 col.prop(self.op, "parallel_angle")
             box = col.box()
             col = box.column(align=True)

scripts/addons/cam/ui/panels/operations_panel.py

@@ -120,6 +120,6 @@ class CAM_OPERATIONS_Panel(CAMParentPanel, Panel):
                 col.prop_search(self.op, "source_image_name", bpy.data, "images")
 
         if self.op.strategy in ["CARVE", "PROJECTED_CURVE"]:
-            col.prop_search(self.op, "curve_object", bpy.data, "objects")
+            col.prop_search(self.op, "curve_source", bpy.data, "objects")
             if self.op.strategy == "PROJECTED_CURVE":
-                col.prop_search(self.op, "curve_object1", bpy.data, "objects")
+                col.prop_search(self.op, "curve_target", bpy.data, "objects")