allow widgets off platform to be dragged back on while still preventing new moves off platform

src/kiri/conf.js

@@ -504,8 +504,8 @@
         },
         // --------------- settings template
         template: {
-            // CAM only
             bounds: {},
+            // CAM only
             origin: {},
             stock: {},
             tools:[

src/kiri/init.js

@@ -1896,18 +1896,26 @@
             if (delta && UI.freeLayout.checked) {
                 let set = settings();
                 let dev = set.device;
-                let bound = set.bounds;
+                let bound = set.bounds_sel;
                 let width = dev.bedWidth/2;
                 let depth = dev.bedDepth/2;
+                let isout = (
+                    bound.min.x <= -width ||
+                    bound.min.y <= -depth ||
+                    bound.max.x >= width ||
+                    bound.max.y >= depth
+                );
+                if (!isout) {
                     if (bound.min.x + delta.x <= -width) return;
                     if (bound.min.y + delta.y <= -depth) return;
                     if (bound.max.x + delta.x >= width) return;
                     if (bound.max.y + delta.y >= depth) return;
+                }
                 API.selection.for_widgets(function(widget) {
                     widget.move(delta.x, delta.y, 0);
                     API.event.emit('widget.move', {widget, delta});
                 });
-                // platform.update_stock();
+                API.selection.update_bounds();
                 API.event.emit('selection.drag', delta);
             } else {
                 return API.selection.meshes().length > 0;

src/kiri/main.js

@@ -82,7 +82,8 @@
         widgets: function() { return selectedMeshes.slice().map(m => m.widget) },
         for_groups: forSelectedGroups,
         for_meshes: forSelectedMeshes,
-        for_widgets: forSelectedWidgets
+        for_widgets: forSelectedWidgets,
+        update_bounds: updateSelectedBounds
     };
 
     const platform = {
@@ -925,6 +926,22 @@
         UI.scaleX.value = UI.scaleX.was = track.scale.x;
         UI.scaleY.value = UI.scaleY.was = track.scale.y;
         UI.scaleZ.value = UI.scaleZ.was = track.scale.z;
+        updateSelectedBounds();
+    }
+
+    function updateSelectedBounds() {
+        // update bounds on selection for drag limiting
+        let bounds_sel = new THREE.Box3();
+        forSelectedWidgets(function(widget) {
+            let wp = widget.track.pos;
+            let wb = widget.mesh.getBoundingBox().clone();
+            wb.min.x += wp.x;
+            wb.max.x += wp.x;
+            wb.min.y += wp.y;
+            wb.max.y += wp.y;
+            bounds_sel.union(wb);
+        });
+        settings.bounds_sel = bounds_sel;
     }
 
     function setOpacity(value) {