private static Point PointOnCircle([NotNull] IArcSegment segment,
double angleInDegreesRelativeToYAxisCounterclockwise)
{
return(PointOnCircle(segment.CentrePoint,
segment.Radius,
angleInDegreesRelativeToYAxisCounterclockwise));
}
private bool IsDistanceToPointGreaterThanRadius(IArcSegment segment,
Point point)
{
var centreToPoint = new Line(segment.CentrePoint,
point);
return(Math.Abs(centreToPoint.Length - segment.Radius) > SelkieConstants.EpsilonDistance);
}
internal TurnCircleArcSegment(IArcSegment arcSegment,
Constants.TurnDirection direction,
Constants.CircleOrigin circleOrigin)
{
ArcSegment = arcSegment;
m_Direction = direction;
m_CircleOrigin = circleOrigin;
AngleToXAxisAtEndPoint = arcSegment.AngleToXAxisAtEndPoint;
AngleToXAxisAtStartPoint = arcSegment.AngleToXAxisAtStartPoint;
}
/// <summary>
/// ArcTo - append an ArcTo to the current figure.
/// </summary>
public override void ArcTo(Point point, Size size, double rotationAngle, bool isLargeArc,
SweepDirection sweepDirection)
{
Debug.Assert(_currentFigure != null);
FinishSegment();
IArcSegment segment = _geometryFactory.CreateArcSegment(point, size, rotationAngle, isLargeArc, sweepDirection);
_currentFigure !.Segments.Add(segment);
_currentSegment = new PathSegmentInfo(MIL_SEGMENT_TYPE.MilSegmentArc, 0);
}
public void UnknonTest()
{
IArcSegment segment = ArcSegment.Unknown;
Assert.True(segment.IsUnknown,
"IsUnknown");
Assert.AreEqual(Point.Unknown,
segment.CentrePoint,
"CentrePoint");
Assert.AreEqual(Point.Unknown,
segment.StartPoint,
"StartPoint");
Assert.AreEqual(Point.Unknown,
segment.EndPoint,
"EndPoint");
Assert.AreEqual(Constants.TurnDirection.Unknown,
segment.TurnDirection,
"TurnDirection");
}
public void Constructor_CreatesArcSegment_WhenCalled()
{
// Arrange
Angle expectedAngle = Angle.For270Degrees;
// Act
IArcSegment actual = m_Sut.ArcSegment;
// Assert
Assert.AreEqual(m_Circle.CentrePoint,
actual.CentrePoint,
"CentrePoint");
Assert.AreEqual(m_StartPoint,
actual.StartPoint,
"StartPoint");
Assert.AreEqual(m_EndPoint,
actual.EndPoint,
"EndPoint");
Assert.AreEqual(expectedAngle,
actual.AngleClockwise,
"AngleClockwise");
}
private bool CalculateIfPointIsOnArcSegment([NotNull] IArcSegment segment,
[NotNull] Point point)
{
if (segment.StartPoint.Equals(point) ||
segment.EndPoint.Equals(point))
{
return(true);
}
if (IsDistanceToPointGreaterThanRadius(segment,
point))
{
return(false);
}
ICircleCentreToPointCalculator calculatorStart = new CircleCentreToPointCalculator(segment.CentrePoint,
segment.StartPoint);
ICircleCentreToPointCalculator calculatorEnd = new CircleCentreToPointCalculator(segment.CentrePoint,
segment.EndPoint);
ICircleCentreToPointCalculator calculatorPoint = new CircleCentreToPointCalculator(segment.CentrePoint,
point);
Angle angleStart = calculatorStart.AngleRelativeToYAxisCounterclockwise;
Angle angleEnd = calculatorEnd.AngleRelativeToYAxisCounterclockwise;
Angle anglePoint = calculatorPoint.AngleRelativeToYAxisCounterclockwise;
if (!(angleStart.Degrees >= 0.0))
{
return(false);
}
if (!(angleEnd.Degrees >= 0.0))
{
return(false);
}
return((anglePoint >= angleStart) &&
(anglePoint <= angleEnd));
}
