correct dup z filter for traces

release.md

@@ -22,6 +22,7 @@ Full docs @ https://docs.grid.space/projects/kiri-moto
 * CAM fix multi-part object import / grouping
 * CAM fix tracing nested polyline offset ordering
 * CAM refactor of contouring yields 2x - 20x speedup
+* CAM update traces to async slicing, fix use with flip
 
 - refactor object/group storage model in Mesh:Tool
 - add omit pocket to rough and outline

src/kiri-mode/cam/slice.js

@@ -371,7 +371,7 @@ CAM.traces = async function(settings, widget, single) {
                     continue;
                 }
                 // do not add duplicates
-                if (traces[i].isEquivalent(poly) && dz < 1) {
+                if (traces[i].isEquivalent(poly) && dz < 0.1) {
                     return;
                 }
             }