我可以计算水平和垂直点，但无法弄清楚如何使用对角线点计算距离.有人可以帮我吗?
I can compute horizontal and vertical points, but I cant figure out how to compute distance using diagonal points. Can someone help me with this.
这是我的水平和垂直测量的代码:
here's the code for my horizontal and vertical measuring:
private float ComputeDistance(float point1, float point2) { float sol1 = point1 - point2; float sol2 = (float)Math.Abs(Math.Sqrt(sol1 * sol1)); return sol2; } protected override void OnMouseMove(MouseEventArgs e) { _endPoint.X = e.X; _endPoint.Y = e.Y; if (ComputeDistance(_startPoint.X, _endPoint.X) <= 10) { str = ComputeDistance(_startPoint.Y, _endPoint.Y).ToString(); } else { if (ComputeDistance(_startPoint.Y, _endPoint.Y) <= 10) { str = ComputeDistance(_startPoint.X, _endPoint.X).ToString(); } } }假定已设置_startPoint.
Assuming that the _startPoint has been already set.
在此图像中，对角点显然是错误的.
In this image the diagonal point is obviously wrong.
推荐答案您需要使用毕达哥拉斯定理.
You need to use Pythagoras' theorem.
d = Math.Sqrt(Math.Pow(end.x - start.x, 2) + Math.Pow(end.y - start.y, 2))