public static CompassPoint DirectionFromAngle(out float angle, Vector delta)
{
angle = (float)-(Math.Atan2(delta.Y, delta.X) / Math.PI * 180.0);
var compassPoint = CompassPoint.East;
if (Numeric.InRange(angle, 0, 45))
{
compassPoint = CompassPoint.NorthWest;
}
else if (Numeric.InRange(angle, 45, 90))
{
compassPoint = CompassPoint.SouthEast;
}
else if (Numeric.InRange(angle, 90, 135))
{
compassPoint = CompassPoint.SouthWest;
}
else if (Numeric.InRange(angle, 135, 180))
{
compassPoint = CompassPoint.NorthEast;
}
else if (Numeric.InRange(angle, 0, -45))
{
compassPoint = CompassPoint.NorthEast;
}
else if (Numeric.InRange(angle, -45, -90))
{
compassPoint = CompassPoint.NorthEast;
}
else if (Numeric.InRange(angle, -90, -135))
{
compassPoint = CompassPoint.NorthWest;
}
else if (Numeric.InRange(angle, -135, -180))
{
compassPoint = CompassPoint.SouthEast;
}
return(compassPoint);
}
private static void Annotate(XGraphics graphics, Palette palette, LineSegment lineSegment, TextBlock text, StringAlignment alignment)
{
Vector point;
var delta = lineSegment.Delta;
switch (alignment)
{
case StringAlignment.Near:
default:
point = lineSegment.Start;
delta.Negate();
break;
case StringAlignment.Center:
point = lineSegment.Mid;
break;
case StringAlignment.Far:
point = lineSegment.End;
break;
}
var bounds = new Rect(point, Vector.Zero);
bounds.Inflate(Settings.TextOffsetFromConnection);
var angle = (float)-(Math.Atan2(delta.Y, delta.X) / Math.PI * 180.0);
var compassPoint = CompassPoint.East;
if (Numeric.InRange(angle, 0, 45))
{
compassPoint = CompassPoint.NorthWest;
}
else if (Numeric.InRange(angle, 45, 90))
{
compassPoint = CompassPoint.SouthEast;
}
else if (Numeric.InRange(angle, 90, 135))
{
compassPoint = CompassPoint.SouthWest;
}
else if (Numeric.InRange(angle, 135, 180))
{
compassPoint = CompassPoint.NorthEast;
}
else if (Numeric.InRange(angle, 0, -45))
{
compassPoint = CompassPoint.NorthEast;
}
else if (Numeric.InRange(angle, -45, -90))
{
compassPoint = CompassPoint.NorthEast;
}
else if (Numeric.InRange(angle, -90, -135))
{
compassPoint = CompassPoint.NorthWest;
}
else if (Numeric.InRange(angle, -135, -180))
{
compassPoint = CompassPoint.SouthEast;
}
var pos = bounds.GetCorner(compassPoint);
var format = new XStringFormat();
Drawing.SetAlignmentFromCardinalOrOrdinalDirection(format, compassPoint);
if (alignment == StringAlignment.Center && Numeric.InRange(angle, -10, 10))
{
// HACK: if the line segment is pretty horizontal and we're drawing mid-line text,
// move text below the line to get it out of the way of any labels at the ends,
// and center the text so it fits onto a line between two proximal rooms.
pos = bounds.GetCorner(CompassPoint.South);
format.Alignment = XStringAlignment.Center;
format.LineAlignment = XLineAlignment.Near;
}
if (!Settings.DebugDisableTextRendering)
{
text.Draw(graphics, Settings.LineFont, palette.LineTextBrush, pos, Vector.Zero, format);
}
}