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在我的项目中，我有一张地图，上面有一个 MapboxGLDraw 图层，可以让用户绘制多边形。在我的 MapboxDrawGl 对象中，我有以下样式：

          // ACTIVE (being drawn)
          // polygon outline
          {
            "id": "gl-draw-polygon-stroke-active",
            "type": "line",
            "filter": ["all", ["==", "$type", "Polygon"], ["!=", "mode", "static"]],
            "layout": {
              "line-cap": "round",
              "line-join": "round"
            },
            "paint": {
              "line-color": "#fff",
              "line-width": 3
            }
          },
      
          // INACTIVE (static, already drawn)
          // polygon outline
          {
            "id": "gl-draw-polygon-stroke-static",
            "type": "line",
            "filter": ["all", ["==", "$type", "Polygon"], ["==", "mode", "simple_select"]],
            "layout": {
              "line-cap": "round",
              "line-join": "round"
            },
            "paint": {
              "line-color": "#fff",
              "line-width": 3
            }
          },
          // polygon fill
          {
            "id": "gl-draw-polygon-fill-static",
            "type": "fill",
            "filter": ["all", ["==", "$type", "Polygon"], ["==", "mode", "simple_select"]],
            "paint": {
              "fill-color": "#225DB3",
              "fill-opacity": 0.4
            }
          },
        ]

这会在绘制时产生一个带有白色轮廓的多边形，在完成绘制时产生一个带有白色轮廓和蓝色填充的多边形。到目前为止，一切都很好。

除了在绘制时，我只希望实际绘制的线（因此两个放置点之间的多边形笔划）是可见的，而不是绘制点和尚未绘制点之间的线。上面的样式是后者。我该如何做到这一点？

所以不是这个，而是只有在实际绘制第三点时才能看到对角线笔划。

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