public void Scan(Scanner scanner, Rectangle clip)
{
Point2D center = (Point2D)Position.Round();
scanner.yMin = center.Y - (int)Radii.Y;
scanner.yMax = center.Y + (int)Radii.Y;
//clip to clip, but with leeway
if(scanner.yMin < clip.Min.Y - 1) scanner.yMin = clip.Min.Y - 1;
if(scanner.yMax > clip.Max.Y + 1) scanner.yMax = clip.Max.Y + 1;
for(int y = scanner.yMin; y <= scanner.yMax; y++)
{
double dy = center.Y - y;
double dx = Math.Sqrt(1 - (dy * dy) / (Radii.Y * Radii.Y)) * Radii.X;
scanner[y] = new Scanner.Scan{min = center.X - (float)dx, max = center.X + (float)dx};
}
//true clip
if(scanner.yMin < clip.Min.Y)
{
scanner.yMin = clip.Min.Y;
scanner.isYMinClipped = true;
}
if(scanner.yMax > clip.Max.Y)
{
scanner.yMax = clip.Max.Y;
scanner.isYMaxClipped = true;
}
}
public void Scan(Scanner scanner, Rectangle clip)
{
scanner.yMin = Rect.Min.Y;
scanner.yMax = Rect.Max.Y;
//clip to clip, but with leeway
if(scanner.yMin < clip.Min.Y - 1) scanner.yMin = clip.Min.Y - 1;
if(scanner.yMax > clip.Max.Y + 1) scanner.yMax = clip.Max.Y + 1;
for(int y = scanner.yMin; y <= scanner.yMax; y++)
{
if(y < Rect.Min.Y + Radii.Y)
{
double dy = (Rect.Min.Y + Radii.Y) - y;
double dx = Math.Sqrt(1 - (dy * dy) / (Radii.Y * Radii.Y)) * Radii.X;
dx -= Radii.X;
scanner[y] = new Scanner.Scan{min = Rect.Min.X - (float)dx, max = Rect.Max.X + (float)dx};
}else
if(y > Rect.Max.Y - Radii.Y)
{
double dy = y - (Rect.Max.Y - Radii.Y);
double dx = Math.Sqrt(1 - (dy * dy) / (Radii.Y * Radii.Y)) * Radii.X;
dx -= Radii.X;
scanner[y] = new Scanner.Scan{min = Rect.Min.X - (float)dx, max = Rect.Max.X + (float)dx};
}else
{
scanner[y] = new Scanner.Scan{min = Rect.Min.X, max = Rect.Max.X};
}
}
//true clip
if(scanner.yMin < clip.Min.Y)
{
scanner.yMin = clip.Min.Y;
scanner.isYMinClipped = true;
}
if(scanner.yMax > clip.Max.Y)
{
scanner.yMax = clip.Max.Y;
scanner.isYMaxClipped = true;
}
}
public void Scan(Scanner scanner, Rectangle clip)
{
scanner.yMin = int.MaxValue;
scanner.yMax = int.MinValue;
for(int i = 0; i < Vertices.Length; i++)
{
scanner.yMin = Math.Min(scanner.yMin, (int)Vertices[i].Y);
scanner.yMax = Math.Max(scanner.yMax, (int)Vertices[i].Y);
}
//clip to clip, but with leeway
if(scanner.yMin < clip.Min.Y - 1) scanner.yMin = clip.Min.Y - 1;
if(scanner.yMax > clip.Max.Y + 1) scanner.yMax = clip.Max.Y + 1;
for(int y = scanner.yMin; y <= scanner.yMax; y++)
{
scanner[y] = new Scanner.Scan{min = float.PositiveInfinity, max = float.NegativeInfinity};
}
for(int i = 0; i < Vertices.Length; i++)
{
ScanLine(scanner, Vertices[i], Vertices[(i + 1) % Vertices.Length]);
}
//true clip
if(scanner.yMin < clip.Min.Y)
{
scanner.yMin = clip.Min.Y;
scanner.isYMinClipped = true;
}
if(scanner.yMax > clip.Max.Y)
{
scanner.yMax = clip.Max.Y;
scanner.isYMaxClipped = true;
}
}