private Point[] CalculateSteps(IPathOld path)
{
var stepDistance = 10;
var pt1 = path.StartPoint;
var pt2 = path.EndPoint;
var origin = path.Origin;
var radius = path.Radius;
//calculate the angle of the start and end point from the origin
var startPointAngle = GeometryHelper.GetAngleFromPoint(pt1, origin);
var endPointAngle = GeometryHelper.GetAngleFromPoint(pt2, origin);
var angleOfPoints = CalculateAngleOfPoints(startPointAngle, endPointAngle);
//determine the length of the curve
var circumference = Math.PI * radius;
var divisor = 360 / angleOfPoints;
//calculate the degrees of each step
var numberOfStepsInCircle = Math.Floor(circumference / stepDistance);
var stepAngle = 360 / numberOfStepsInCircle;
int numberOfStepsInCurve = (int)Math.Floor(numberOfStepsInCircle / divisor);
var currentAngle = startPointAngle;
var result = new Point[numberOfStepsInCurve*2];
for (int i = 0; i < numberOfStepsInCurve; i++)
{
currentAngle += stepAngle;
result[i*2] = GeometryHelper.GetPointAtAngle(origin, radius - (path.Width/4), currentAngle);
result[i * 2 + 1] = GeometryHelper.GetPointAtAngle(origin, radius + (path.Width/4), currentAngle);
}
return result;
}
public PathOutlineVisualOld(IPathOld path, Color color)
{
var brush = new SolidColorBrush(color);
var pen = new Pen(brush, 1);
var geometry = new StreamGeometry();
using (var gc = geometry.Open())
{
gc.BeginFigure(path.StartBottomEdge, false, false);
gc.LineTo(path.StartTopEdge, true, true);
gc.ArcTo(path.EndTopEdge, new Size(path.Radius+(path.Width/2), path.Radius+(path.Width/2)), 1, false, SweepDirection.Clockwise, true, true);
gc.LineTo(path.EndBottomEdge, true, true);
gc.ArcTo(path.StartBottomEdge, new Size(path.Radius-(path.Width/2), path.Radius-(path.Width/2)), 1, false, SweepDirection.Counterclockwise, true, true);
}
using (var context = RenderOpen())
{
context.DrawGeometry(brush, pen, geometry);
var points = CalculateSteps(path);
foreach (var point in points)
{
DrawPoint(point, Brushes.Blue, context);
}
}
}
