// todo drag lines up/down
private static SlopedLine GetLine(Coord from, Coord to)
{
SlopedLine l1 = new SlopedLine();
l1.Segments.Add(new LineSegment(l1, from, to, SegmentType.Line));
return(l1);
}
public void PaintLine_horizontal()
{
var line = new SlopedLine();
line.Segments.Add(new LineSegment(line, new Coord(0, 0), new Coord(0, 1), SegmentType.Line));
var res = PaintOneLine(line);
Assert.AreEqual(
@"|
|", res);
}
private static void PaintSlopedLine(Canvass canvass, SlopedLine slopedLine)
{
foreach (var segment in slopedLine.Segments)
{
char c = GetLineChar(segment.Direction, segment.Type);
var delta = Math.Abs(segment.From.X - segment.To.X);
int direction;
direction = segment.From.X < segment.To.X ? 1 : -1;
for (int i = 0; i <= delta; i++)
{
var newPos = new Coord(segment.From.X + (i * direction), segment.From.Y);
PaintLineOrCross(canvass, newPos, c, segment.Id);
}
direction = segment.From.Y < segment.To.Y ? 1 : -1;
delta = Math.Abs(segment.From.Y - segment.To.Y);
for (int i = 0; i <= delta; i++)
{
var newPos = new Coord(segment.From.X, segment.From.Y + (i * direction));
PaintLineOrCross(canvass, newPos, c, segment.Id);
}
}
}
