Javascript 更新形状并将新值保存在json中

到目前为止，我用一个提示框更改了值。。。现在，我需要的是，这些变化是明确的。这意味着它们在json文件中也会发生变化。作为补充。更改提示框中的值后，应更新形状。我的代码如下所示：

var leength = INTERSECTED.parent.children[0].geometry.vertices.length / 2;
                    for (var pu = 0; pu < leength; pu++) {
                        var mesx = INTERSECTED.parent.children[0].geometry.vertices[pu].x;
                        var mesy = INTERSECTED.parent.children[0].geometry.vertices[pu].y;

                        //  INTERSECTED.parent.children[0].name = namefloe[0];

                        var showx = prompt("Usage: Business  Punkt x" + (pu + 1), mesx);
                        var showy = prompt("Usage: Business  Punkt y" + (pu + 1), mesy);

                        if (prompt != null) {
                            alert(" Punkt x" + (pu + 1) + " : " + showx + " Punkt y" + (pu + 1) + " : " + showy);
                        }
                        INTERSECTED.parent.children[0].geometry.vertices[pu].x = showx;
                        INTERSECTED.parent.children[0].geometry.vertices[pu].y = showy;

var leength=INTERSECTED.parent.children[0].geometry.vertices.length/2；
对于（var pu=0；pu

要自动更新值，应添加顶点已更改

INTERSECTED.parent.children[0].geometry.verticesNeedUpdate = true;

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包含'INTERSECTED.parent.children[0].geometry.dynamic=true；'