C# 使用kinect将用户脸上的跟踪点放置到阵列中

我目前正在尝试使用xbox kinect跟踪用户的面部表情。我从“人脸跟踪基础”中提取了一些代码，并存储了它使用的点的位置：

            var faceModelPts = new List<Point>();
            var faceModel = new List<FaceModelTriangle>();

            for (int i = 0; i < this.facePoints.Count; i++)
            {
                faceModelPts.Add(new Point(this.facePoints[i].X + 0.5f, this.facePoints[i].Y + 0.5f));
            }

我所做的只是一个简单的错误，还是不能以这种方式将这些信息放入数组

            var faceModelPts = new List<Point>();
            var faceModel = new List<FaceModelTriangle>();

            for (int i = 0; i < this.facePoints.Count; i++)
            {
                faceModelPts.Add(new Point(this.facePoints[i].X + 0.5f, this.facePoints[i].Y + 0.5f));
            }

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还有，一旦我获得了点的位置，我如何在该位置检索深度信息？

您似乎没有初始化阵列

            var faceModelPts = new List<Point>();
            var faceModel = new List<FaceModelTriangle>();

            for (int i = 0; i < this.facePoints.Count; i++)
            {
                faceModelPts.Add(new Point(this.facePoints[i].X + 0.5f, this.facePoints[i].Y + 0.5f));
            }

xarray = new double[someSize];
yarray = new double[someSize];

这可以解释数组中的空指针，除非您在引用的代码之外声明它

            var faceModelPts = new List<Point>();
            var faceModel = new List<FaceModelTriangle>();

            for (int i = 0; i < this.facePoints.Count; i++)
            {
                faceModelPts.Add(new Point(this.facePoints[i].X + 0.5f, this.facePoints[i].Y + 0.5f));
            }

---

在VisualStudio中的该行上设置断点。当您在调试过程中点击它时，请检查以验证

xarray

是否为空。

在xarray[i]=this.facePoints[i].X上显示“NullReferenceException was unhandled”（NullReferenceException was unhandled）；

            var faceModelPts = new List<Point>();
            var faceModel = new List<FaceModelTriangle>();

            for (int i = 0; i < this.facePoints.Count; i++)
            {
                faceModelPts.Add(new Point(this.facePoints[i].X + 0.5f, this.facePoints[i].Y + 0.5f));
            }