public Polygon ClipToPolygon(Polygon clipper)
{
Point[] inPolygonVertices = new Point[this.Points.Length + 2 * clipper.Points.Length];
for (int i = 0; i < this.Points.Length; i++)
{
inPolygonVertices[i] = this.Points[i];
}
Point[] outPolygonVertices = new Point[this.Points.Length + 2 * clipper.Points.Length];
Polygon.ClipEdge clipEdge = new Polygon.ClipEdge(clipper.Points.Last(), clipper.Points.First());
int num = this.SutherlandHodgmanPolygonClip(inPolygonVertices, this.Points.Length, outPolygonVertices, clipEdge);
for (int j = 0; j < clipper.points.Length - 1; j++)
{
Point[] tmpVertices = inPolygonVertices;
inPolygonVertices = outPolygonVertices;
outPolygonVertices = tmpVertices;
clipEdge = new Polygon.ClipEdge(clipper.Points[j], clipper.Points[j + 1]);
num = this.SutherlandHodgmanPolygonClip(inPolygonVertices, num, outPolygonVertices, clipEdge);
}
Point[] clippedPolygonVertices = new Point[num];
for (int k = 0; k < num; k++)
{
clippedPolygonVertices[k] = outPolygonVertices[k];
}
return new Polygon(clippedPolygonVertices);
}
public static void FillPolygon(this Graphics g, Polygon polygon, Color color)
{
var polygonFillHelper = new PolygonFillHelper(new List<Point>(polygon.Points));
var segments = polygonFillHelper.FillPolygon(g);
using (Pen pen = new Pen(color))
{
foreach (var segment in segments)
{
g.DrawLine(pen, segment.p1, segment.p2);
}
}
}
public static void FillPolygon(this Graphics g, Polygon polygon, Bitmap texture, Bitmap destination)
{
var polygonFillHelper = new PolygonFillHelper(new List<Point>(polygon.Points));
var segments = polygonFillHelper.FillPolygon(g);
for (int y = 0; y < segments.Count; y++)
{
for (int x = 0; x < segments[y].p2.X - segments[y].p1.X; x++)
{
Color color = texture.GetPixel(x % texture.Width, y % texture.Height);
if (segments[y].p1.X + x < destination.Width && segments[y].p1.X + x > 0 && segments[y].p1.Y > 0 && segments[y].p1.Y < destination.Height)
destination.SetPixel(segments[y].p1.X + x, segments[y].p1.Y, color);
}
}
}
public WindowPolygon(List<Point> vertices)
: base(vertices)
{
basePolygon = new Polygon(vertices);
_clipper = new Rectangle(MinX, MinY, MaxX - MinX, MaxY - MinY);
}
public override void CalculatePositions()
{
//double scaledStripLength = StripLength
double scale1 = DistFromCar / _roadStateManager.RoadLength;
double scale2 = (DistFromCar+StripLength*(DistFromCar/_roadStateManager.RoadLength)) / _roadStateManager.RoadLength;
double rwdiv2 = (_roadStateManager.RoadWidth/2);
double y1screen = _roadStateManager.RoadY + DistFromCar;
double y2screen = _roadStateManager.RoadY + _roadStateManager.RoadLength*scale2;
double x1screen = rwdiv2*(1 + X*scale1) - StripWidth * scale1;
double x2screen = rwdiv2 * (1 + X * scale1) + StripWidth * scale1;
double x3screen = rwdiv2 * (1 + X * scale2) - StripWidth * scale2;
double x4screen = rwdiv2 * (1 + X * scale2) + StripWidth * scale2;
List<Point> vertices = new List<Point>();
//dodaje przeciwnie do wsk zegara
vertices.Add(new Point((int)x2screen, (int)y1screen));
vertices.Add(new Point((int)x1screen, (int)y1screen));
vertices.Add(new Point((int)x3screen, (int)y2screen));
vertices.Add(new Point((int)x4screen, (int)y2screen));
PolygonRepresentation = new Polygon(vertices);
}
private int SutherlandHodgmanPolygonClip(Point[] inArray, int inLength, Point[] outArray, Polygon.ClipEdge clipBoundary)
{
if (inLength < 3)
{
return 0;
}
int num = 0;
Point point = inArray[inLength - 1];
for (int i = 0; i < inLength; i++)
{
Point point1 = inArray[i];
if (this.Inside(point1, clipBoundary))
{
if (!this.Inside(point, clipBoundary))
{
int num1 = num;
num = num1 + 1;
outArray[num1] = this.Intersect(point, point1, clipBoundary);
int num2 = num;
num = num2 + 1;
outArray[num2] = point1;
}
else
{
int num3 = num;
num = num3 + 1;
outArray[num3] = point1;
}
}
else if (this.Inside(point, clipBoundary))
{
int num4 = num;
num = num4 + 1;
outArray[num4] = this.Intersect(point, point1, clipBoundary);
}
point = point1;
}
return num;
}
private Point Intersect(Point s, Point p, Polygon.ClipEdge ClipBoundary)
{
return ClipBoundary.IntersectWith(s, p);
}
private bool Inside(Point p, Polygon.ClipEdge ClipBoundary)
{
return ClipBoundary.IsPointInside(p);
}
