private void lineTo(BMyPoint target, BMyCanvas canvas)
{
int x, y, t, deltaX, deltaY, incrementX, incrementY, pdx, pdy, ddx, ddy, es, el, err;
BMyPoint origin = canvas.Position;
deltaX = target.X - origin.X;
deltaY = target.Y - origin.Y;
incrementX = Math.Sign(deltaX);
incrementY = Math.Sign(deltaY);
if (deltaX < 0)
{
deltaX = -deltaX;
}
if (deltaY < 0)
{
deltaY = -deltaY;
}
if (deltaX > deltaY)
{
pdx = incrementX; pdy = 0;
ddx = incrementX; ddy = incrementY;
es = deltaY; el = deltaX;
}
else
{
pdx = 0; pdy = incrementY;
ddx = incrementX; ddy = incrementY;
es = deltaX; el = deltaY;
}
x = origin.X;
y = origin.Y;
err = el / 2;
canvas.TrySetPixel(x, y);
for (t = 0; t < el; ++t)
{
err -= es;
if (err < 0)
{
err += el;
x += ddx;
y += ddy;
}
else
{
x += pdx;
y += pdy;
}
canvas.TrySetPixel(x, y);
}
}
private void setSymetric(int x, int y, BMyCanvas canvas)
{
BMyPoint o = canvas.Position;
canvas.TrySetPixel(o.X + x, o.Y + y, false);
canvas.TrySetPixel(o.X + y, o.Y + x, false);
canvas.TrySetPixel(o.X + y, o.Y + -x, false);
canvas.TrySetPixel(o.X + x, o.Y + -y, false);
canvas.TrySetPixel(o.X + -x, o.Y + -y, false);
canvas.TrySetPixel(o.X + -y, o.Y + -x, false);
canvas.TrySetPixel(o.X + -y, o.Y + x, false);
canvas.TrySetPixel(o.X + -x, o.Y + y, false);
}
public bool TrySetPixel(int x, int y, bool moveto = true)
{
if (isInBounds(x, y))
{
_raster[x][y] = color.ToChar();
if (moveto)
{
Position = new BMyPoint(x, y);
}
return(true);
}
else
{
return(false);
}
}
public override bool TryRun(BMyDrawingCommand command, BMyCanvas canvas, BMyEnvironment Env)
{
string[] argv = command.Args.Split(new char[] { ',' });
int x;
int y;
if (
argv.Length == 2 &&
int.TryParse(argv[0], out x) &&
int.TryParse(argv[1], out y)
)
{
BMyPoint target = new BMyPoint(x, y);
lineTo(target, canvas);
return(true);
}
else
{
return(false);
}
}
public override bool TryRun(BMyDrawingCommand command, BMyCanvas canvas, BMyEnvironment Env)
{
string[] argv = command.Args.Split(new char[] { ',' });
int x;
int y;
if (
argv.Length == 2 &&
int.TryParse(argv[0], out x) &&
int.TryParse(argv[1], out y)
)
{
bool success = false;
BMyPoint origin = canvas.Position;
BMyDrawingCommand linetoCommand = new BMyDrawingCommand(string.Format(@"lineto {0},{1}", x, origin.Y));
if (Env.TryRunDraw(linetoCommand, canvas))
{
linetoCommand = new BMyDrawingCommand(string.Format(@"lineto {0},{1}", x, y));
if (Env.TryRunDraw(linetoCommand, canvas))
{
linetoCommand = new BMyDrawingCommand(string.Format(@"lineto {0},{1}", origin.X, y));
if (Env.TryRunDraw(linetoCommand, canvas))
{
linetoCommand = new BMyDrawingCommand(string.Format(@"lineto {0},{1}", origin.X, origin.Y));
if (Env.TryRunDraw(linetoCommand, canvas))
{
success = true;
}
}
}
}
canvas.Position = new BMyPoint(x, y);
return(success);
}
else
{
return(false);
}
}
