//ToDo: fix drawline algorythm
public static void DrawLine(this GraphicContext gc, Point p1, Point p2, Color color)
{
uint dx, dy, p, x = 0, y = 0, x0, y0, x1, y1;
x0 = p1.X;
y0 = p1.Y;
x1 = p2.X;
y1 = p2.Y;
dx = x1 - x0;
dy = y1 - y0;
p = 2 * dy - dx;
while (x < x1)
{
if (p >= 0)
{
gc.SetPixel(color, new Point(x, y));
y = y + 1;
p = p + 2 * dy - 2 * dx;
}
else
{
gc.SetPixel(color, new Point(x, y));
p = p + 2 * dy;
}
x = x + 1;
}
}
public static void DrawCircle(this GraphicContext gc, Point loc, uint radius, Color color)
{
uint x = radius;
uint y = 0;
uint err = 0;
while (x >= y)
{
gc.SetPixel(color, new Point(loc.X + x, loc.Y + y));
gc.SetPixel(color, new Point(loc.X + y, loc.Y + x));
gc.SetPixel(color, new Point(loc.X - y, loc.Y + x));
gc.SetPixel(color, new Point(loc.X - x, loc.Y + y));
gc.SetPixel(color, new Point(loc.X - x, loc.Y - y));
gc.SetPixel(color, new Point(loc.X - y, loc.Y - x));
gc.SetPixel(color, new Point(loc.X + y, loc.Y - x));
gc.SetPixel(color, new Point(loc.X + x, loc.Y - y));
if (err <= 0)
{
y = y + 1;
err = err + 2 * x + 1;
}
if (err > 0)
{
x = x - 1;
err = err - 2 * x + 1;
}
}
}
/// <summary>
/// Draws an filled Rectangle on the Display
/// </summary>
/// <param name="rec">The Location and Bounds of the Rectangle</param>
/// <param name="color">The color of the Rectangle</param>
public static void FillRectangle(this GraphicContext gc, Rectangle rec, Color color)
{
for (int x = 0; x < rec.Size.Width; x++)
{
for (int y = 0; y < rec.Size.Height; y++)
{
gc.SetPixel(color, rec.Location + new Point(x, y));
}
}
}
/// <summary>
/// Draw An Image on the Screen
/// </summary>
/// <param name="gc">The GraphicContext to draw</param>
/// <param name="location">The Location to start Drawing</param>
/// <param name="img">The Image to draw</param>
public static void DrawImage(this GraphicContext gc, Point location, Image img)
{
for (uint x1 = 0; x1 < img.Width; x1++)
{
for (uint y1 = 0; y1 < img.Height; y1++)
{
gc.SetPixel(img.GetPixel(x1, y1), new Point(location.X + x1, location.Y + y1));
}
}
}
public static void FillTriangle(this GraphicContext gc, Point loc, Point v0, Point v1, Point v2, Color c)
{
var scanBuffer = new List <MinMaxPair>();
for (int i = 0; i < gc.Size.Height; i++)
{
scanBuffer.Add(new MinMaxPair(0, 0));
}
Point minYVert = v0;
Point midYVert = v1;
Point maxYVert = v2;
if (maxYVert.Y < midYVert.Y)
{
Point temp = maxYVert;
maxYVert = midYVert;
midYVert = temp;
}
if (midYVert.Y < minYVert.Y)
{
Point temp = midYVert;
midYVert = minYVert;
minYVert = temp;
}
if (maxYVert.Y < midYVert.Y)
{
Point temp = maxYVert;
maxYVert = midYVert;
midYVert = temp;
}
float area = minYVert.TriangleArea(maxYVert, midYVert);
int handedness = area >= 0 ? 1 : 0;
ScanConvertTriangle(gc, scanBuffer, minYVert, midYVert, maxYVert, handedness);
for (var j = 0; j < scanBuffer.Count; j++)
{
var minMaxPair = scanBuffer[j];
for (int i = minMaxPair.Min; i < minMaxPair.Max; i++)
{
gc.SetPixel(c, new Point((uint)(loc.X + i), (uint)(loc.Y + j)));
}
}
}