double RArc::getAngleAt(double distance, RS::From from) const {
QList<RVector> points = getPointsWithDistanceToEnd(distance, from);
if (points.length()!=1) {
return RNANDOUBLE;
}
return center.getAngleTo(points[0]) + (reversed ? -M_PI/2 : M_PI/2);
}
double RSpline::getAngleAt(double distance, RS::From from) const {
QList<RVector> points = getPointsWithDistanceToEnd(distance, from);
if (points.length()!=1) {
return RNANDOUBLE;
}
double t = getTAtPoint(points[0]);
ON_3dVector v = curve.DerivativeAt(t);
return RVector(v.x, v.y).getAngle();
}
/**
* \return Point at given percentile.
*/
RVector RShape::getPointAtPercent(double p) const {
double length = getLength();
double distance = p * length;
QList<RVector> candidates = getPointsWithDistanceToEnd(distance, RS::FromStart);
if (candidates.length()!=1) {
return RVector::invalid;
}
return candidates.at(0);
}
