/// <summary>
/// Gets the path representing this element.
/// </summary>
public override VectorPath GetPath(SVGElement context, RenderContext renderer)
{
Css.RenderableData rd = context.RenderData;
// Don't build the path if there's no radius:
float radius = Radius.GetDecimal(rd, ViewportAxis.None);
if (radius <= 0)
{
return(null);
}
if (_Path == null)
{
// Don't need to consider stroke width.
_Path = new VectorPath();
float centerX = CenterX.GetDecimal(rd, ViewportAxis.X);
float centerY = CenterX.GetDecimal(rd, ViewportAxis.Y);
// Get the C values:
float cX = BezierC * radius;
float cY = cX;
// Offset to match the center:
cX += centerX;
cY += centerY;
float radiusX = centerX + radius;
float radiusY = centerY + radius;
float nRadiusX = centerX - radius;
float nRadiusY = centerY - radius;
_Path.MoveTo(centerX, radiusY);
// First quadrant (top right, going clockwise):
_Path.CurveTo(cX, radiusY, radiusX, cY, radiusX, centerY);
// Bottom right:
_Path.CurveTo(radiusX, -cY, cX, nRadiusY, centerX, nRadiusY);
// Bottom left:
_Path.CurveTo(-cX, nRadiusY, nRadiusX, -cY, nRadiusX, centerY);
// Top left:
_Path.CurveTo(nRadiusX, cY, -cX, radiusY, centerX, radiusY);
// Mark as closed:
_Path.LatestPathNode.IsClose = true;
}
return(_Path);
}