public static PointPair GetLineFromSegment(PointPair segment, PointPair borders)
{
PointPair result = new PointPair();
if (segment.P1 == segment.P2)
{
result = segment;
}
else if (segment.P1.X == segment.P2.X)
{
result.P1.X = segment.P1.X;
result.P2.X = segment.P1.X;
result.P1.Y = borders.P1.Y;
result.P2.Y = borders.P2.Y;
if (segment.P1.Y > segment.P2.Y)
{
result.P1.Y = borders.P2.Y;
result.P2.Y = borders.P1.Y;
}
}
else if (segment.P1.Y == segment.P2.Y)
{
result.P1.X = borders.P1.X;
result.P1.Y = segment.P1.Y;
result.P2.X = borders.P2.X;
result.P2.Y = segment.P1.Y;
if (segment.P1.X > segment.P2.X)
{
result.P1.X = borders.P2.X;
result.P2.X = borders.P1.X;
}
}
else
{
var deltaX = segment.P2.X - segment.P1.X;
var deltaY = segment.P2.Y - segment.P1.Y;
var deltaXYRatio = deltaX / deltaY;
var deltaYXRatio = deltaY / deltaX;
result.P1.Y = deltaY > 0 ? borders.P1.Y : borders.P2.Y;
result.P1.X = segment.P1.X + (result.P1.Y - segment.P1.Y) * deltaXYRatio;
if (result.P1.X < borders.P1.X)
{
result.P1.X = borders.P1.X;
result.P1.Y = segment.P1.Y + (result.P1.X - segment.P1.X) * deltaYXRatio;
}
else if (result.P1.X > borders.P2.X)
{
result.P1.X = borders.P2.X;
result.P1.Y = segment.P1.Y + (result.P1.X - segment.P1.X) * deltaYXRatio;
}
result.P2.X = deltaX > 0 ? borders.P2.X : borders.P1.X;
result.P2.Y = segment.P2.Y + (result.P2.X - segment.P2.X) * deltaYXRatio;
if (result.P2.Y < borders.P1.Y)
{
result.P2.Y = borders.P1.Y;
result.P2.X = segment.P2.X + (result.P2.Y - segment.P2.Y) * deltaXYRatio;
}
else if (result.P2.Y > borders.P2.Y)
{
result.P2.Y = borders.P2.Y;
result.P2.X = segment.P2.X + (result.P2.Y - segment.P2.Y) * deltaXYRatio;
}
}
return(result);
}
public static bool IsPointInSegmentBoundingRect(PointPair segment, Point point)
{
var boundingRect = segment.GetBoundingRect().Inflate(0.00001);
return(boundingRect.Contains(point));
}