public static ColorPolygon GeneratePolygon(int x, int y, int width, int height)
{
var randomPoints = new List<Point>();
for (var i = 0; i < 10; i++) randomPoints.Add(new Point(x + Random.Next(width), y + Random.Next(height)));
var hull = ConvexHull(randomPoints.ToArray());
hull.Reverse();
var filling = ScanLine.PolygonFilling(hull.Select(p => new Point(p.X - x, p.Y - y)).ToList(),out var colorTab,true,width,height);
var polygon = new ColorPolygon(hull, Color.Black, colorTab,filling);
polygon.Shift.Y = y;
return polygon;
}
public ClippedPolygon(List <Point> points, ColorPolygon colorPoly)
{
Points = points;
ColorPoly = colorPoly;
}
public void DrawPoints(List <Point> points, Color color, bool inside = false, ColorPolygon colorPolygon = null)
{
for (var i = 0; i < points.Count; i++)
{
var point = points[i];
var x = point.X;
var y = point.Y;
if (x < 0 || x >= _width || y < 0 || y >= _height)
{
continue;
}
if (inside)
{
color = MainTexture.texture[x, y];
double dot = dotProducts[x, y];
var R = ((color.R / 255d) + (_lightColor.R / 255d)) / 2 * dot;
var G = ((color.G / 255d) + (_lightColor.G / 255d)) / 2 * dot;
var B = ((color.B / 255d) + (_lightColor.B / 255d)) / 2 * dot;
R = Math.Min(Math.Max(0, R), 1);
G = Math.Min(Math.Max(0, G), 1);
B = Math.Min(Math.Max(0, B), 1);
color = Color.FromArgb((int)(255 * R), (int)(255 * G), (int)(255 * B));
}
if (colorPolygon != null)
{
if (color != Color.White)
{
color = colorPolygon.ColorTab[x, y];
}
x += colorPolygon.Shift.X;
y += colorPolygon.Shift.Y;
if (x >= _width || y >= _height)
{
continue;
}
}
var pixelOffset = CalculatePixelOffset(x, y);
_sourceBuffer[pixelOffset] = color.B;
_sourceBuffer[pixelOffset + 1] = color.G;
_sourceBuffer[pixelOffset + 2] = color.R;
_sourceBuffer[pixelOffset + 3] = color.A;
}
}
