public static Polygon RandomCircleSweep(double scale, int vertexCount)
{
PolygonPoint point;
PolygonPoint[] points;
double radius = scale / 4;
points = new PolygonPoint[vertexCount];
for (int i = 0; i < vertexCount; i++) {
do {
if (i % 250 == 0) {
radius += scale / 2 * (0.5 - RNG.NextDouble());
} else if (i % 50 == 0) {
radius += scale / 5 * (0.5 - RNG.NextDouble());
} else {
radius += 25 * scale / vertexCount * (0.5 - RNG.NextDouble());
}
radius = radius > scale / 2 ? scale / 2 : radius;
radius = radius < scale / 10 ? scale / 10 : radius;
} while (radius < scale / 10 || radius > scale / 2);
point = new PolygonPoint(radius * Math.Cos((PI_2 * i) / vertexCount),
radius * Math.Sin((PI_2 * i) / vertexCount));
points[i] = point;
}
return new Polygon(points);
}
/// <summary>
/// Removes a point from the polygon.
/// </summary>
/// <param name="p"></param>
public void RemovePoint(PolygonPoint p)
{
PolygonPoint next, prev;
next = p.Next;
prev = p.Previous;
prev.Next = next;
next.Previous = prev;
_points.Remove(p);
}
/// <summary>
/// Inserts newPoint after point.
/// </summary>
/// <param name="point">The point to insert after in the polygon</param>
/// <param name="newPoint">The point to insert into the polygon</param>
public void InsertPointAfter(PolygonPoint point, PolygonPoint newPoint)
{
// Validate that
int index = _points.IndexOf(point);
if (index == -1)
{
throw new ArgumentException("Tried to insert a point into a Polygon after a point not belonging to the Polygon", "point");
}
newPoint.Next = point.Next;
newPoint.Previous = point;
point.Next.Previous = newPoint;
point.Next = newPoint;
_points.Insert(index + 1, newPoint);
}
public void AddPoints(IEnumerable <PolygonPoint> list)
{
foreach (PolygonPoint point2 in list)
{
point2.Previous = this._last;
if (this._last != null)
{
point2.Next = this._last.Next;
this._last.Next = point2;
}
this._last = point2;
this._points.Add(point2);
}
PolygonPoint point = (PolygonPoint)this._points[0];
this._last.Next = point;
point.Previous = this._last;
}
/// <summary>
/// Inserts list (after last point in polygon?)
/// </summary>
/// <param name="list"></param>
public void AddPoints(IEnumerable <PolygonPoint> list)
{
PolygonPoint first;
foreach (PolygonPoint p in list)
{
p.Previous = _last;
if (_last != null)
{
p.Next = _last.Next;
_last.Next = p;
}
_last = p;
_points.Add(p);
}
first = (PolygonPoint)_points[0];
_last.Next = first;
first.Previous = _last;
}
public static Polygon RandomCircleSweep2(double scale, int vertexCount)
{
PolygonPoint point;
PolygonPoint[] points;
double radius = scale / 4;
points = new PolygonPoint[vertexCount];
for (int i = 0; i < vertexCount; i++)
{
do
{
radius += scale / 5 * (0.5 - RNG.NextDouble());
radius = radius > scale / 2 ? scale / 2 : radius;
radius = radius < scale / 10 ? scale / 10 : radius;
} while (radius < scale / 10 || radius > scale / 2);
point = new PolygonPoint(radius * Math.Cos((PI_2 * i) / vertexCount),
radius * Math.Sin((PI_2 * i) / vertexCount));
points[i] = point;
}
return(new Polygon(points));
}
/// <summary>
/// Removes a point from the polygon.
/// </summary>
/// <param name="p"></param>
public void RemovePoint( PolygonPoint p )
{
PolygonPoint next, prev;
next = p.Next;
prev = p.Previous;
prev.Next = next;
next.Previous = prev;
_points.Remove(p);
}
/// <summary>
/// Inserts newPoint after point.
/// </summary>
/// <param name="point">The point to insert after in the polygon</param>
/// <param name="newPoint">The point to insert into the polygon</param>
public void InsertPointAfter( PolygonPoint point, PolygonPoint newPoint )
{
// Validate that
int index = _points.IndexOf(point);
if (index == -1) throw new ArgumentException("Tried to insert a point into a Polygon after a point not belonging to the Polygon", "point");
newPoint.Next = point.Next;
newPoint.Previous = point;
point.Next.Previous = newPoint;
point.Next = newPoint;
_points.Insert(index + 1, newPoint);
}
/// <summary>
/// Inserts list (after last point in polygon?)
/// </summary>
/// <param name="list"></param>
public void AddPoints( IEnumerable<PolygonPoint> list )
{
PolygonPoint first;
foreach (PolygonPoint p in list) {
p.Previous = _last;
if (_last != null) {
p.Next = _last.Next;
_last.Next = p;
}
_last = p;
_points.Add(p);
}
first = (PolygonPoint)_points[0];
_last.Next = first;
first.Previous = _last;
}
/// <summary>
/// Adds a point after the last in the polygon.
/// </summary>
/// <param name="p">The point to add</param>
public void AddPoint( PolygonPoint p )
{
p.Previous = _last;
p.Next = _last.Next;
_last.Next = p;
_points.Add(p);
}
