修正点选 fix #IHYFW

src/Editor/PointPick.ts

@@ -34,7 +34,8 @@ export function PointPick(ptVcs: Vector3, view: Viewer | PreViewer, selectObject
     }, view.Camera);
     raycaster.ray.origin.sub(raycaster.ray.direction.clone().multiplyScalar(1e3));
 
-    let selectList = [];
+    let pickObj: Object3D;
+    let minDis: number;
     for (let obj of selectObject.children)
     {
         if (IsNotRayCaster(obj))
@@ -46,10 +47,16 @@ export function PointPick(ptVcs: Vector3, view: Viewer | PreViewer, selectObject
                 o.raycast(raycaster, intersects)
         })
         if (intersects.length > 0)
-            selectList.push(obj);
+            if (!minDis || minDis > intersects[0].distance)
+            {
+                pickObj = obj;
+                minDis = intersects[0].distance
+            }
     }
-    if (selectList.length > 0)
-        return selectList;
+    if (pickObj)
+        return [pickObj];
+
+    let selectList = [];
 
     let pCenter = new THREE.Vector2(ptVcs.x, ptVcs.y);
     let selectSize = new THREE.Vector2(10, 10);