private void DrawDistortedLine(Graphics canvas, Pen pen, PointF a, PointF b, ProjectiveMapping projectiveMapping, DistortionHelper distorter, IImageToViewportTransformer transformer)
{
a = projectiveMapping.Forward(a);
b = projectiveMapping.Forward(b);
if (distorter != null && distorter.Initialized)
{
a = distorter.Distort(a);
b = distorter.Distort(b);
List <PointF> curve = distorter.DistortLine(a, b);
List <Point> transformed = transformer.Transform(curve);
canvas.DrawCurve(penEdges, transformed.ToArray());
}
else
{
canvas.DrawLine(pen, transformer.Transform(a), transformer.Transform(b));
}
}
private void DrawTickMark(Graphics canvas, DistortionHelper distorter, IImageToViewportTransformer transformer, TickMark tick, SolidBrush brushFill, SolidBrush fontBrush, Font font)
{
string label = String.Format("{0}", Math.Round(tick.Value, 3));
PointF location;
if (distorter != null && distorter.Initialized)
{
location = distorter.Distort(tick.ImageLocation);
}
else
{
location = tick.ImageLocation;
}
PointF transformed = transformer.Transform(location);
SizeF labelSize = canvas.MeasureString(label, font);
PointF textPosition = GetTextPosition(transformed, tick.TextAlignment, labelSize);
RectangleF backRectangle = new RectangleF(textPosition, labelSize);
RoundedRectangle.Draw(canvas, backRectangle, brushFill, font.Height / 4, false, false, null);
canvas.DrawString(label, font, fontBrush, backRectangle.Location);
}
/// <summary>
/// Returns the origin of the coordinate system in image coordinates.
/// </summary>
public PointF GetOrigin()
{
return(distortionHelper.Distort(calibrator.Untransform(PointF.Empty)));
}
