|  | @@ -1151,41 +1151,43 @@ safetypathremove(){
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				|  |  |      this.clearArrow();
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				|  |  |      this.arrowActors = [];
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				|  |  |      velocitys.forEach(velocity => {
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				|  |  | -      velocity.points.forEach(point => {
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				|  |  | -        // const initialValues = { 
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				|  |  | -        //   base:0,
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				|  |  | -        //   shape: 'arrow4points',
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				|  |  | -        //   center: [point.x,point.y,point.z],
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				|  |  | -        //   direction:[
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				|  |  | -        //     velocity.vector[2],
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				|  |  | -        //     velocity.vector[0],
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				|  |  | -        //     velocity.vector[1]
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				|  |  | -        //   ],
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				|  |  | -        //   height: 10.0,
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				|  |  | -        //   thickness: 1.5,
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				|  |  | -        //   width: 3,
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				|  |  | -        //  };
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				|  |  | -        // const vtk2d = vtk2DShape.newInstance(initialValues);
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				|  |  | -
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				|  |  | +      // velocity.points.forEach(point => {
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				|  |  | +      //   const initialValues = {
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				|  |  | +      //     center: [point.x, point.y, point.z],
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				|  |  | +      //     height: 10.0,
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				|  |  | +      //     radius:2,
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				|  |  | +      //     resolution: 6,
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				|  |  | +      //     direction: [
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				|  |  | +      //       velocity.vector[0],
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				|  |  | +      //       velocity.vector[1],
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				|  |  | +      //       velocity.vector[2]
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				|  |  | +      //     ],
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				|  |  | +      //     capping: true,
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				|  |  | +
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				|  |  | +      //   };
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				|  |  | +      //   const vtk2d = vtkConeSource.newInstance(initialValues);
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				|  |  | +
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				|  |  | +      //   const mapper = vtkMapper.newInstance();
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				|  |  | +      //   mapper.setInputConnection(vtk2d.getOutputPort());
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				|  |  | +      //   const actor = vtkActor.newInstance();
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				|  |  | +      //   actor.setMapper(mapper);
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				|  |  | +      //   actor.getProperty().setColor(REA);
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				|  |  | +      //   this.arrowActors.push(actor);
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				|  |  | +      //   // this.renderer.addActor(actor);
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				|  |  | +      // })
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				|  |  | +      if(velocity.points&&velocity.points.length>0){
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				|  |  | +        let point = velocity.points[0];
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				|  |  |          const initialValues = {
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				|  |  | -          // base: 0,
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				|  |  |            center: [point.x, point.y, point.z],
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				|  |  | -          // height: 10,
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				|  |  | -          // radius: 3,
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				|  |  | -          // resolution: 6,
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				|  |  |            height: 10.0,
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				|  |  |            radius:2,
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				|  |  |            resolution: 6,
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				|  |  |            direction: [
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				|  |  | -            // velocity.vector[2],
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				|  |  | -            // velocity.vector[0],
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				|  |  | -            // velocity.vector[1]
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				|  |  |              velocity.vector[0],
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				|  |  |              velocity.vector[1],
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				|  |  |              velocity.vector[2]
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				|  |  |            ],
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				|  |  |            capping: true,
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				|  |  | -
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				|  |  |          };
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				|  |  |          const vtk2d = vtkConeSource.newInstance(initialValues);
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				|  |  |  
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				|  | @@ -1195,8 +1197,8 @@ safetypathremove(){
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				|  |  |          actor.setMapper(mapper);
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				|  |  |          actor.getProperty().setColor(REA);
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				|  |  |          this.arrowActors.push(actor);
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				|  |  | -        // this.renderer.addActor(actor);
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				|  |  | -      })
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				|  |  | +        this.renderer.addActor(actor)
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				|  |  | +      }
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				|  |  |      });
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				|  |  |      for (let index = 0; index < this.arrowActors.length; index=index+30) {
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				|  |  |        let actor =this.arrowActors[index];
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