修正盒子被切割没有使用交集空间的问题

src/Geometry/Box.ts

@@ -37,12 +37,15 @@ export class Box3Ext extends Box3
         if (interBox.isEmpty() || !interBox.isSolid())
             return [this];
 
-        let b1Max = this.max.clone().setComponent(spaceType, interBox.min.getComponent(spaceType));
-        let b2Min = this.min.clone().setComponent(spaceType, interBox.max.getComponent(spaceType));
+        let p1 = interBox.min.clone().setComponent(spaceType, this.min.getComponent(spaceType));
+        let p2 = interBox.max.clone().setComponent(spaceType, interBox.min.getComponent(spaceType));
+
+        let p3 = interBox.min.clone().setComponent(spaceType, interBox.max.getComponent(spaceType));
+        let p4 = interBox.max.clone().setComponent(spaceType, this.max.getComponent(spaceType));
 
         return [
-            new Box3Ext(this.min, b1Max),
-            new Box3Ext(b2Min, this.max)
+            new Box3Ext(p1, p2),
+            new Box3Ext(p3, p4)
         ].filter(b => b.isSolid());
     }
     clampSpace(b2: Box3Ext, splitType: SplitType)