public Point GetPoint(double length, double segmentLength)
{
if (length < 0 || length > Length)
{
throw new ArgumentOutOfRangeException();
}
if (_isReverse)
{
length = Length - length;
}
var parameter = GraphicHelper.GetParameter(_degree, _controlPoints, _knots, _weights, _startParameter, length, _length, segmentLength);
return(GraphicHelper.ComputePoint(_degree, _knots, _controlPoints, _weights, parameter));
}
public Point GetPoint(double length, double segmentLength)
{
if (length < 0 || length > Length)
{
throw new ArgumentOutOfRangeException();
}
if (_isReverse)
{
length = Length - length;
}
var parameter = GraphicHelper.GetParameter(_lr, _sr, 0, length, segmentLength);
return(_center + new Vector(_lr * Math.Cos(parameter), _sr * Math.Sin(parameter)) * GraphicHelper.CreateRotateMatrix(_center, _rotateAngle));
}
public IEnumerable <IGraphic> Spilt(IEnumerable <Segment> segments, double segmentLength)
{
foreach (var segment in segments)
{
var startOffset = segment.StartOffset;
var endOffset = segment.EndOffset;
if (_isReverse)
{
startOffset = _length - segment.EndOffset;
endOffset = _length - segment.StartOffset;
}
var startAngle = Utilities.RadianToAngle(GraphicHelper.GetParameter(_lr, _sr, 0, startOffset, segmentLength));
var endAngle = Utilities.RadianToAngle(GraphicHelper.GetParameter(_lr, _sr, 0, endOffset, segmentLength));
yield return(new GraphicEllipticalArc(_center, _lr, _sr, startAngle, endAngle, _rotateAngle, _isReverse));
}
}
public Vector GetTangent(double length, double segmentLength)
{
if (length < 0 || length > Length)
{
throw new ArgumentOutOfRangeException();
}
if (_isReverse)
{
length = Length - length;
}
var parameter = GraphicHelper.GetParameter(_degree, _controlPoints, _knots, _weights, _startParameter, length, _length, segmentLength);
var dir = GraphicHelper.ComputeVector(_degree, 1, _knots, _controlPoints, parameter);
if (_isReverse)
{
dir = -dir;
}
return(dir);
}
public Vector GetTangent(double length, double segmentLength)
{
if (length < 0 || length > Length)
{
throw new ArgumentOutOfRangeException();
}
if (_isReverse)
{
length = Length - length;
}
var parameter = GraphicHelper.GetParameter(_lr, _sr, 0, length, segmentLength);
var dir = new Vector(-_lr * Math.Sin(parameter), _sr * Math.Cos(parameter));
if (_isReverse)
{
dir = -dir;
}
return(dir);
}