public void BrushLine(Canvas.Pixel _p1, Canvas.Pixel _p2, Canvas.Brush _brush)
{
var bh = new Bresenham(_p1, _p2);
do
{
Paint(bh.Current, _brush);
} while (bh.MoveNext());
}
public static HashSet <Pixel> StageLine(Pixel _p1, Pixel _p2)
{
var pixels = new HashSet <Pixel>();
var bh = new Bresenham(_p1, _p2);
do
{
pixels.Add(bh.Current);
} while (bh.MoveNext());
return(pixels);
}
public static HashSet <Pixel> StageTriangle(Pixel _p1, Pixel _p2, Pixel _p3)
{
var vertices = new[]
{
_p1, _p2, _p3
};
// Sort by y
Array.Sort(vertices, (_a, _b) => _a.y.CompareTo(_b.y));
var bhLong = new Bresenham(vertices[0], vertices[2]);
var bhShortA = new Bresenham(vertices[0], vertices[1]);
var bhShortB = new Bresenham(vertices[1], vertices[2]);
var curY = bhLong.Current.y;
var stagedPixels = new HashSet <Pixel> {
bhLong.Current
};
do
{
if (!bhShortA.End)
{
do
{
bhLong.MoveNext();
} while (bhLong.Current.y == curY && !bhLong.End);
do
{
bhShortA.MoveNext();
} while (bhShortA.Current.y == curY && !bhShortA.End);
//Debug
if (bhLong.Previous.y != bhShortA.Previous.y)
{
throw new Exception("Y Mismatch");
}
stagedPixels.UnionWith(StageLineHorizontal(curY, bhLong.Previous.x, bhShortA.Previous.x));
curY = bhLong.Current.y;
}
else
{
do
{
bhShortB.MoveNext();
} while (bhShortB.Current.y != bhLong.Current.y && !bhShortB.End);
//Debug
if (bhLong.Previous.y != bhShortB.Previous.y)
{
throw new Exception("Y Mismatch");
}
stagedPixels.UnionWith(StageLineHorizontal(curY, bhLong.Previous.x, bhShortB.Previous.x));
do
{
bhLong.MoveNext();
} while (bhLong.Current.y == curY && !bhLong.End);
curY = bhLong.Current.y;
}
} while (!bhLong.End);
return(stagedPixels);
}