| public static FromPoints ( Point point1, Point point2 ) : Line | ||
| point1 | Point | One point on the line. |
| point2 | Point | Another point on the line. |
| return | Line | |
private static ConvexityDefect extractDefect(List <IntPoint> contour, int startIndex, int endIndex)
{
// Navigate the contour until the next point of the convex hull,
// taking note of the distance between the current contour point
// and the line connecting the two consecutive convex hull points
IntPoint start = contour[startIndex];
IntPoint end = contour[endIndex];
Line line = Line.FromPoints(start, end);
double maxDepth = 0;
int maxIndex = 0;
for (int i = startIndex; i < endIndex; i++)
{
double d = line.DistanceToPoint(contour[i]);
if (d > maxDepth)
{
maxDepth = d;
maxIndex = i;
}
}
return(new ConvexityDefect(maxIndex, startIndex, endIndex, maxDepth));
}
/// <summary>
/// Calculate minimum angle between two lines measured in [0, 90] degrees range.
/// </summary>
///
/// <param name="a1">A point on the first line.</param>
/// <param name="a2">Another point on the first line.</param>
/// <param name="b1">A point on the second line.</param>
/// <param name="b2">Another point on the second line.</param>
///
/// <returns>Returns minimum angle between two lines.</returns>
///
/// <remarks><para><note>It is preferred to use <see cref="Line.GetAngleBetweenLines"/> if it is required to calculate angle
/// multiple times for one of the lines.</note></para></remarks>
///
/// <exception cref="ArgumentException"><paramref name="a1"/> and <paramref name="a2"/> are the same,
/// -OR- <paramref name="b1"/> and <paramref name="b2"/> are the same.</exception>
///
public static float GetAngleBetweenLines(Point a1, Point a2, Point b1, Point b2)
{
Line line1 = Line.FromPoints(a1, a2);
return(line1.GetAngleBetweenLines(Line.FromPoints(b1, b2)));
}
/// <summary>
/// Initializes a new instance of the <see cref="LineSegment"/> class.
/// </summary>
///
/// <param name="start">Segment's start point.</param>
/// <param name="end">Segment's end point.</param>
///
/// <exception cref="ArgumentException">Thrown if the two points are the same.</exception>
///
public LineSegment(Point start, Point end)
{
line = Line.FromPoints(start, end);
this.start = start;
this.end = end;
}
