public override void Render(FontRenderer renderer, Point origin)
{
var currentEndPoint = 0;
var currentState = RenderState.Initial;
var sequenceStartPoint = default(Point);
Point initial = default(Point);
Point control = default(Point);
for (var i = 0; i < points.Length; i++)
{
var point = points[i];
var renderPoint = new Point(point.X, point.Y);
switch (currentState)
{
case RenderState.Initial:
if (!point.OnCurve)
{
throw new FormatException("Initial point should be on curve");
}
initial = renderPoint;
sequenceStartPoint = initial;
currentState = RenderState.HaveStartPoint;
break;
case RenderState.HaveStartPoint:
if (point.OnCurve)
{
renderer.DrawLine(initial, renderPoint);
initial = renderPoint;
currentState = RenderState.HaveStartPoint;
}
else
{
control = renderPoint;
currentState = RenderState.HaveControlPoint;
}
break;
case RenderState.HaveControlPoint:
if (point.OnCurve)
{
var curve = new BezierCurve();
curve.AddPoint(initial);
curve.AddPoint(control);
curve.AddPoint(renderPoint);
renderer.DrawCurve(curve);
initial = renderPoint;
currentState = RenderState.HaveStartPoint;
}
else
{
var midPoint = (control + renderPoint) / 2;
var curve = new BezierCurve();
curve.AddPoint(initial);
curve.AddPoint(control);
curve.AddPoint(midPoint);
renderer.DrawCurve(curve);
initial = midPoint;
control = renderPoint;
currentState = RenderState.HaveControlPoint;
}
break;
default:
throw new ArgumentOutOfRangeException();
}
if (endPoints[currentEndPoint] == i)
{
if (currentState == RenderState.HaveControlPoint)
{
var curve = new BezierCurve();
curve.AddPoint(initial);
curve.AddPoint(control);
curve.AddPoint(sequenceStartPoint);
renderer.DrawCurve(curve);
}
if (currentState == RenderState.Initial)
{
throw new FormatException("Ending an empty curve");
}
sequenceStartPoint = default(Point);
initial = default(Point);
control = default(Point);
currentState = RenderState.Initial;
currentEndPoint++;
}
}
if (currentState != RenderState.Initial)
{
throw new FormatException("Trailing points found");
}
}