private void GetStartEndPoints(double angle1, double angle2, out Point start, out Point end, out double angle)
{
start = null;
end = null;
angle = -1;
if (angle2 - angle1 > 0 && angle2 - angle1 < Angle.toRadians(180))
{
start = endpoint1;
end = endpoint2;
angle = angle1;
}
else if (angle1 - angle2 > 0 && angle1 - angle2 < Angle.toRadians(180))
{
start = endpoint2;
end = endpoint1;
angle = angle2;
}
else if (angle2 - angle1 > 0 && angle2 - angle1 >= Angle.toRadians(180))
{
start = endpoint2;
end = endpoint1;
angle = angle2;
}
else if (angle1 - angle2 > 0 && angle1 - angle2 >= Angle.toRadians(180))
{
start = endpoint1;
end = endpoint2;
angle = angle1;
}
}
public override double GetArea(Area_Based_Analyses.KnownMeasurementsAggregator known)
{
if (theArc is Semicircle)
{
return((theArc as Semicircle).GetArea(known));
}
// Central Angle; this is minor arc measure by default
double angleMeasure = Angle.toRadians(known.GetAngleMeasure(this.theArc.GetCentralAngle()));
if (angleMeasure <= 0)
{
return(-1);
}
// Make a major arc measure, if needed.
if (theArc is MajorArc)
{
angleMeasure = 2 * Math.PI - angleMeasure;
}
// Radius / Circle
double circArea = theArc.theCircle.GetArea(known);
if (circArea <= 0)
{
return(-1);
}
// The area is a proportion of the circle defined by the angle.
return((angleMeasure / (2 * Math.PI)) * circArea);
}
//
// Add the 16-point unit circle to the set of snapping points
//
private void Construct16PointSnapPoints()
{
// Add all points to the unit circle
foreach (int angle in ANGLE_MEASURES)
{
double x = this.radius * Math.Cos(Angle.toRadians(angle));
double y = this.radius * Math.Sin(Angle.toRadians(angle));
allComposingPoints.Add(new Point(angle.ToString() + "^o", x, y));
}
}
public override List <Segment> Segmentize()
{
if (approxSegments.Any())
{
return(approxSegments);
}
// How much we will change the angle measure as we create segments.
double angleIncrement = Angle.toRadians(this.minorMeasure / Figure.NUM_SEGS_TO_APPROX_ARC);
// Find the first point so we sweep in a counter-clockwise manner.
double angle1 = Point.GetRadianStandardAngleWithCenter(theCircle.center, endpoint1);
double angle2 = Point.GetRadianStandardAngleWithCenter(theCircle.center, endpoint2);
Point firstPoint = null;
Point secondPoint = null;
double angle = -1;
GetStartEndPoints(angle1, angle2, out firstPoint, out secondPoint, out angle);
for (int i = 1; i <= Figure.NUM_SEGS_TO_APPROX_ARC; i++)
{
// Save this as an approximating point.
approxPoints.Add(firstPoint);
// Get the next point.
angle += angleIncrement;
secondPoint = Point.GetPointFromAngle(theCircle.center, theCircle.radius, angle);
// Make the segment.
approxSegments.Add(new Segment(firstPoint, secondPoint));
// Rotate points.
firstPoint = secondPoint;
}
// Save this as an approximating point.
approxPoints.Add(secondPoint);
return(approxSegments);
}
public double GetMajorArcMeasureRadians()
{
return(Angle.toRadians(GetMajorArcMeasureDegrees()));
}
private double CalculateArcMinorMeasureRadians()
{
return(Angle.toRadians(new Angle(new Segment(theCircle.center, endpoint1), new Segment(theCircle.center, endpoint2)).measure));
}
public static Point GetPointByLengthAndAngleInThirdQuadrant(int length, int measure)
{
return(new Point("", length * Math.Cos(Angle.toRadians(180 - measure)), length * Math.Sin(Angle.toRadians(180 - measure))));
}
//
//
// Random number Generation (end)
//
//
public static Point GetPointByLengthAndAngleInStandardPosition(int length, double measure)
{
return(new Point("", length * Math.Cos(Angle.toRadians(measure)), length * Math.Sin(Angle.toRadians(measure))));
}
