private static void Line(Texture2D texture, int x0, int y0, int x1, int y1, Color color)
{
int width = texture.width;
int height = texture.height;
bool isSteep = Math.Abs(y1 - y0) > Math.Abs(x1 - x0);
if (isSteep)
{
Swap(ref x0, ref y0);
Swap(ref x1, ref y1);
}
if (x0 > x1)
{
Swap(ref x0, ref x1);
Swap(ref y0, ref y1);
}
int deltax = x1 - x0;
int deltay = Math.Abs(y1 - y0);
int error = deltax / 2;
int ystep;
int y = y0;
if (y0 < y1)
ystep = 1;
else
ystep = -1;
for (int x = x0; x < x1; x++)
{
if (isSteep)
texture.DrawPixel(y, x, width, height, color);
else
texture.DrawPixel(x, y, width, height, color);
error = error - deltay;
if (error < 0)
{
y = y + ystep;
error = error + deltax;
}
}
}
private static void PlotCircle(Texture2D texture, int cx, int x, int cy, int y, Color color)
{
texture.DrawPixel(cx + x, cy + y, color); // Point in octant 1...
texture.DrawPixel(cy + x, cx + y, color);
texture.DrawPixel(-cx + x, cy + y, color);
texture.DrawPixel(-cy + x, cx + y, color);
texture.DrawPixel(-cx + x, -cy + y, color);
texture.DrawPixel(-cy + x, -cx + y, color);
texture.DrawPixel(cx + x, -cy + y, color);
texture.DrawPixel(cy + x, -cx + y, color); // ... point in octant 8
}