C++ (Cpp) REllipse::getStartPoint示例

示例#1

QList<RVector> RShape::getIntersectionPointsAE(const RArc& arc1,
        const REllipse& ellipse2, bool limited) {
    QList<RVector> candidates =
            RShape::getIntersectionPointsCE(
                RCircle(arc1.getCenter(), arc1.getRadius()),
                ellipse2);

    if (!limited) {
        return candidates;
    }

    QList<RVector> res;

    for (int i=0; i<candidates.count(); i++) {
        RVector c = candidates[i];
        if (arc1.isOnShape(c)) {
            if (!ellipse2.isFullEllipse()) {
                double a1 = ellipse2.getCenter().getAngleTo(ellipse2.getStartPoint());
                double a2 = ellipse2.getCenter().getAngleTo(ellipse2.getEndPoint());
                double a = ellipse2.getCenter().getAngleTo(c);
                if (!RMath::isAngleBetween(a, a1, a2, ellipse2.isReversed())) {
                    continue;
                }
            }

            res.append(c);
        }
    }

    return res;
}

示例#2

QList<RVector> RShape::getIntersectionPointsEE(const REllipse& ellipse1, const REllipse& ellipse2, bool limited) {
    QList<RVector> candidates = getIntersectionPointsEE(ellipse1, ellipse2);

    if (!limited) {
        return candidates;
    }

    QList<RVector> ret;

    for (int i=0; i<candidates.length(); i++) {
        RVector c = candidates[i];
        bool onShape = true;

        double a1 = ellipse1.getCenter().getAngleTo(ellipse1.getStartPoint());
        double a2 = ellipse1.getCenter().getAngleTo(ellipse1.getEndPoint());
        double a = ellipse1.getCenter().getAngleTo(c);
        if (!RMath::isAngleBetween(a, a1, a2, ellipse1.isReversed())) {
//            qDebug() << "1) angle NOT between: "
//                << " a: " << RMath::rad2deg(a)
//                << " a1: " << RMath::rad2deg(a1)
//                << " a2: " << RMath::rad2deg(a2)
//                << " r: " << ellipse1.isReversed();
            //ret.append(c);
            onShape = false;
        }

        a1 = ellipse2.getCenter().getAngleTo(ellipse2.getStartPoint());
        a2 = ellipse2.getCenter().getAngleTo(ellipse2.getEndPoint());
        a = ellipse2.getCenter().getAngleTo(c);
        if (!RMath::isAngleBetween(a, a1, a2, ellipse2.isReversed())) {
//            qDebug() << "2) angle NOT between: "
//                << " a: " << RMath::rad2deg(a)
//                << " a1: " << RMath::rad2deg(a1)
//                << " a2: " << RMath::rad2deg(a2)
//                << " r: " << ellipse2.isReversed();
            //ret.append(c);
            onShape = false;
        }

        if (onShape) {
            ret.append(c);
        }
    }

    return ret;
}