internal bool CalculateIsLargeArc(ITurnCircleArcSegment segment)
{
Geometry.Shapes.Point startPoint = segment.CentrePoint;
Geometry.Shapes.Point endPoint = segment.CircleOrigin == Constants.CircleOrigin.Start
? segment.EndPoint
: segment.StartPoint;
Geometry.Shapes.Point checkPoint = segment.CircleOrigin == Constants.CircleOrigin.Start
? segment.StartPoint
: segment.EndPoint;
var line = new Line(-1,
startPoint,
endPoint);
Constants.TurnDirection turnDirection = line.TurnDirectionToPoint(checkPoint);
bool isLargeArc;
if ( segment.CircleOrigin == Constants.CircleOrigin.Start )
{
isLargeArc = turnDirection == segment.TurnDirection;
}
else
{
isLargeArc = turnDirection != segment.TurnDirection;
}
return isLargeArc;
}
internal PathFigureCollection CreateFigures(ITurnCircleArcSegment startSegment,
ITurnCircleArcSegment middleSegment,
ITurnCircleArcSegment endSegment)
{
ArcSegment arcStartSegment = m_Helper.SegmentToArcSegment(startSegment);
ArcSegment arcMiddleSegment = m_Helper.SegmentToArcSegment(middleSegment);
ArcSegment arcFinishSegment = m_Helper.SegmentToArcSegment(endSegment);
var pathSegments = new List <PathSegment>
{
arcStartSegment,
arcMiddleSegment,
arcFinishSegment
};
Point start = m_Helper.PointRelativeToOrigin(startSegment.StartPoint);
var pathFigure = new PathFigure(start,
pathSegments,
false);
var figures = new PathFigureCollection
{
pathFigure
};
return figures;
}
public void Unknown_SetsIsUnknownToTrue_WhenCreated()
{
// Arrange
// Act
ITurnCircleArcSegment actual = TurnCircleArcSegment.Unknown;
// Assert
Assert.True(actual.IsUnknown,
"IsUnknown");
}
public void Unknown_SetsAngleToXAxisAtStartPointToUnknown_WhenCreated()
{
// Arrange
// Act
ITurnCircleArcSegment actual = TurnCircleArcSegment.Unknown;
// Assert
Assert.AreEqual(Angle.Unknown,
actual.AngleToXAxisAtStartPoint,
"AngleToXAxisAtStartPoint");
}
public ArcSegment SegmentToArcSegment(ITurnCircleArcSegment segment)
{
Geometry.Shapes.Point endPoint = segment.EndPoint;
Point finishEndPoint = PointRelativeToOrigin(endPoint);
var finishSize = new Size(segment.Radius,
segment.Radius);
SweepDirection finishSweepDirection =
segment.TurnDirection == Constants.TurnDirection.Clockwise
? SweepDirection.Clockwise
: SweepDirection.Counterclockwise;
bool isLargeArc = CalculateIsLargeArc(segment);
ArcSegment arcSegment = CreateArcSegment(finishEndPoint,
finishSize,
finishSweepDirection,
isLargeArc);
return arcSegment;
}
private static void AssertTurnCircleArcSegment(ITurnCircleArcSegment actual,
ICircle expectedCircle,
Point expectedStartPoint,
Point expectedEndPoint,
Constants.CircleOrigin origin)
{
Assert.AreEqual(origin,
actual.CircleOrigin,
"CircleOrigin");
Assert.AreEqual(expectedCircle.CentrePoint,
actual.CentrePoint,
"CentrePoint");
Assert.AreEqual(expectedCircle.Radius,
actual.Radius,
"Radius");
Assert.AreEqual(expectedStartPoint,
actual.StartPoint,
"StartPoint");
Assert.AreEqual(expectedEndPoint,
actual.EndPoint,
"EndPoint");
}
