bool RS_Ellipse::switchMajorMinor(void)
//switch naming of major/minor, return true if success
{
if (fabs(data.ratio) < RS_TOLERANCE) return false;
RS_Vector vp_start=getStartpoint();
RS_Vector vp_end=getStartpoint();
RS_Vector vp=getMajorP();
setMajorP(RS_Vector(- data.ratio*vp.y, data.ratio*vp.x)); //direction pi/2 relative to old MajorP;
setRatio(1./data.ratio);
if( std::isnormal(getAngle1()) || std::isnormal(getAngle2() ) ) {
//only reset start/end points for ellipse arcs, i.e., angle1 angle2 are not both zero
setAngle1(getEllipseAngle(vp_start));
setAngle2(getEllipseAngle(vp_end));
}
return true;
}
/**
* mirror by the axis defined by axisPoint1 and axisPoint2
*/
void RS_Ellipse::mirror(RS_Vector axisPoint1, RS_Vector axisPoint2) {
RS_Vector center=getCenter();
RS_Vector mp = center + getMajorP();
RS_Vector startpoint = getStartpoint();
RS_Vector endpoint = getEndpoint();
center.mirror(axisPoint1, axisPoint2);
mp.mirror(axisPoint1, axisPoint2);
startpoint.mirror(axisPoint1, axisPoint2);
endpoint.mirror(axisPoint1, axisPoint2);
setCenter(center);
setReversed(!isReversed());
setMajorP(mp - center);
if( std::isnormal(getAngle1()) || std::isnormal(getAngle2() ) ) {
//only reset start/end points for ellipse arcs, i.e., angle1 angle2 are not both zero
setAngle1( getEllipseAngle(startpoint));
setAngle2( getEllipseAngle(endpoint));
}
/* old version
data.majorP = mp - data.center;
double a = axisPoint1.angleTo(axisPoint2);
RS_Vector vec;
vec.setPolar(1.0, data.angle1);
vec.mirror(RS_Vector(0.0,0.0), axisPoint2-axisPoint1);
data.angle1 = vec.angle() - 2*a;
vec.setPolar(1.0, data.angle2);
vec.mirror(RS_Vector(0.0,0.0), axisPoint2-axisPoint1);
data.angle2 = vec.angle() - 2*a;
data.reversed = (!data.reversed);
*/
//calculateEndpoints();
correctAngles();//avoid extra 2.*M_PI in angles
calculateBorders();
}
RS_VectorSolutions LC_Hyperbola::getFoci() const {
RS_Vector vp(getMajorP()*sqrt(1.-getRatio()*getRatio()));
return RS_VectorSolutions({getCenter()+vp, getCenter()-vp});
}
