
using System.Drawing;
public static bool JudgeInRectArea(double x, double y, double left, double top, double right, double bottom)
{
return JudgeInRectArea(new PointF((float)x, (float)y), new PointF((float)left, (float)top), new PointF((float)right, (float)top), new PointF((float)right, (float)bottom), new PointF((float)left, (float)bottom));
}
public static bool JudgeInRectArea(PointF point, Rectangle rectangle)
{
return JudgeInRectArea(point, new PointF(rectangle.Left, rectangle.Top), new PointF(rectangle.Right, rectangle.Top),
new PointF(rectangle.Right, rectangle.Bottom), new PointF(rectangle.Left, rectangle.Bottom));
}
public static bool JudgeInRectArea(PointF point, double left, double top, double right, double bottom)
{
return JudgeInRectArea(point, new PointF((float)left, (float)top), new PointF((float)right, (float)top), new PointF((float)right, (float)bottom), new PointF((float)left, (float)bottom));
}
public static bool JudgeInRectArea(PointF point, PointF p1, PointF p2, PointF p3, PointF p4)
{
var rslt = GetCross(p1, p2, point) * GetCross(p3, p4, point) >= 0 && GetCross(p2, p3, point) * GetCross(p4, p1, point) >= 0;
return rslt;
}
private static double GetCross(PointF p1, PointF p2, PointF point)
{
return (p2.X - p1.X) * (point.Y - p1.Y) - (p2.Y - p1.Y) * (point.X - p1.X);
}
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