public static Rectangle GetVideoNodeRect(VideoNode node)
{
Rectangle rect = new Rectangle(
node.ptLocation.X,
node.ptLocation.Y,
node.Image.Width,
node.Image.Height);
return(rect);
}
/// <summary>
/// 查找距离某个点最近的Node
/// </summary>
/// <param name="nodes"></param>
/// <param name="maxDis">查找的最大距离</param>
/// <returns></returns>
public static VideoNode GetNearestNode(List <VideoNode> nodes, Point pt, int maxDis)
{
int dis = int.MaxValue;
VideoNode nearestNode = null;
foreach (VideoNode node in nodes)
{
int X = node.ptLocation.X + node.Image.Width / 2;
int Y = node.ptLocation.Y + node.Image.Height / 2;
int curDis = (X - pt.X) * (X - pt.X) + (Y - pt.Y) * (Y - pt.Y);
if (
curDis < dis &&
curDis < (maxDis + node.Image.Width / 2) * (maxDis + node.Image.Width / 2)
)
{
dis = curDis;
nearestNode = node;
}
}
return(nearestNode);
}
public ConnectLine(VideoNode start, VideoNode end)
{
this.startNode = start;
this.endNode = end;
}
/// <summary>
/// 判断某个点是否在某个Node之内
/// </summary>
/// <param name="pt"></param>
/// <param name="node"></param>
/// <returns></returns>
public static bool IsPointInNode(Point pt, VideoNode node)
{
return(IsPointInRectangle(pt, GetVideoNodeRect(node)));
}