// Create intermediate QDPoints by sweeping around a standard elliptical arc shape then manually
// applying the rotation and translation to the QDPoint.
//@Override
public override List <QDShapeDBPoint> getIntermediatePoints(float spacing)
{
List <QDShapeDBPoint> pts = new List <QDShapeDBPoint>();
// Get angle required to achieve desired QDPoint spacing at major axis extreme
float angleStep = 2f * (float)Math.Atan(0.5f * spacing / mSemiX);
// With a +ve CCW step, choose if we should sweep from start or finish to produce our arc
float startSweep, finishSweep;
if (direction == SweepDirection.Counterclockwise)
{
startSweep = QDUtils.QDUtils.degToRad(mStartAngleD); finishSweep = QDUtils.QDUtils.degToRad(mFinishAngleD);
}
else
{
startSweep = QDUtils.QDUtils.degToRad(mFinishAngleD); finishSweep = QDUtils.QDUtils.degToRad(mStartAngleD);
}
// Check whether the arc goes over the -pi barrier and adjust finish angle accordingly
if (finishSweep < 0f && startSweep > finishSweep)
{
finishSweep += 2.0f * (float)Math.PI;
}
// Progress through the sweep
for (float t = startSweep; t < finishSweep; t += angleStep)
{
QDPoint parametric = new QDPoint(mSemiX * (float)Math.Cos(t), mSemiY * (float)Math.Sin(t));
QDPoint rotatedPoint = new QDPoint((float)Math.Cos(mAngleR) * parametric.x - (float)Math.Sin(mAngleR) * parametric.y,
(float)Math.Sin(mAngleR) * parametric.x + (float)Math.Cos(mAngleR) * parametric.y);
QDPoint translatedPoint = new QDPoint(rotatedPoint.x + mCentre.x, rotatedPoint.y + mCentre.y);
QDShapeDBPoint sampled = new QDShapeDBPoint(translatedPoint, QDPointTypes.CIRCLE_CIRCUMFERENCE);
pts.Add(sampled);
}
return(pts);
}
public QDShapeDBPoint(QDShapeDBPoint other) : base(other)
{
type = other.type;
}
