fix(drawing/drawing): Don't infringe upon wraparound limbs and its fillets' limbs

Sadly, this degrades performance considerably. But we will improve it later.

src/drawing/drawing.rs

@@ -771,7 +771,20 @@ impl<CW: Clone, Cel: Copy, R: AccessRules> Drawing<CW, Cel, R> {
         let to = self.add_dot_infringably(recorder, dot_weight);
 
         let seg = self
-            .add_seg(recorder, from, seg_to.into(), seg_weight, filter)
+            .add_seg(
+                recorder,
+                from,
+                seg_to.into(),
+                seg_weight,
+                &|drawing, infringer, infringee| {
+                    filter(drawing, infringer, infringee)
+                        // Don't infringe upon limbs of the current wraparound.
+                        && !PrimitiveIndex::from(around)
+                            .primitive(drawing)
+                            .limbs()
+                            .contains(&infringee)
+                },
+            )
             .inspect_err(|_| {
                 self.recording_geometry_with_rtree
                     .remove_dot(recorder, to.into());

src/layout/layout.rs

@@ -18,7 +18,7 @@ use crate::{
         },
         gear::GearIndex,
         graph::{GetMaybeNet, IsInLayer, MakePrimitive, PrimitiveIndex, PrimitiveWeight},
-        primitive::MakePrimitiveShape,
+        primitive::{GetLimbs, MakePrimitiveShape},
         rules::AccessRules,
         seg::{
             FixedSegIndex, FixedSegWeight, LoneLooseSegIndex, LoneLooseSegWeight, SegIndex,
@@ -92,7 +92,18 @@ impl<R: AccessRules> Layout<R> {
             seg_weight,
             bend_weight,
             sense,
-            &|_drawing, _infringer, _infringee| true,
+            &|drawing, _infringer, infringee| {
+                // Don't infringe upon limbs of wraparound's filleteds.
+                !drawing
+                    .overlapees(around.into())
+                    .find(|overlapee| {
+                        PrimitiveIndex::from(overlapee.1)
+                            .primitive(drawing)
+                            .limbs()
+                            .contains(&infringee)
+                    })
+                    .is_some()
+            },
         )
     }