fix(PointPicker): Fixed pointId would be overwritten with multiple actors

Author: yarous224

Sources/Rendering/Core/PointPicker/index.js

@@ -145,7 +145,10 @@ function vtkPointPicker(publicAPI, model) {
       }
     }
 
-    model.pointId = minPtId;
+    if (minPtId > -1 && tMin < model.globalTMin) {
+      model.globalTMin = tMin;
+      model.pointId = minPtId;
+    }
     return tMin;
   };
 }