re-design and refactor slice line reconnection

src/kiri/app/api.js

@@ -144,7 +144,9 @@ export const api = {
             layers = Array.isArray(layers) ? layers : [layers];
             proc.xray = layers.map(l => raw ? l : base + l * size - size / 2);
             proc.xrayi = layers.slice();
-            api.function.slice();
+            api.function.slice(
+                // () => SPACE.platform.showGrid(false)
+            );
         }
     },
     device,

src/kiri/mode/fdm/slice.js

@@ -125,7 +125,7 @@ export function fdm_slice(settings, widget, onupdate, ondone) {
         isSynth = widget.track.synth,
         isSupport = widget.track.support,
         useAssembly = assembly,
-        isConcurrent = threaded && minions.concurrent,
+        isConcurrent = threaded && minions.concurrent && !process.xray,
         topLayers = process.sliceTopLayers || 0,
         bottomLayers = process.sliceBottomLayers || 0,
         vaseMode = process.sliceFillType === 'vase' && !isSynth,
@@ -353,7 +353,7 @@ export function fdm_slice(settings, widget, onupdate, ondone) {
                 slice.index = process.xray.shift();
                 slice.lines = lines;
                 slice.groups = groups;
-                slice.xray = process.xray;
+                slice.xray = slice.index;
             }
             return slice;
         }).filter(s => s);