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Fix unproject / navaid drawing.

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James Turner 2015-11-15 15:37:22 +00:00
parent eb06aeba97
commit 5fd350cb3d
1 changed files with 12 additions and 6 deletions
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18
src/GUI/BaseDiagram.cxx
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@ -163,16 +163,19 @@ void BaseDiagram::paintNavaids(QPainter* painter)
QTransform xf = painter->transform();
painter->setTransform(QTransform()); // reset to identity
QTransform invT = xf.inverted();
SGGeod topLeft = unproject(invT.map(QPointF(0,0)), m_projectionCenter);
SGGeod topLeft = unproject(invT.map(rect().topLeft()), m_projectionCenter);
SGGeod viewCenter = unproject(invT.map(rect().center()), m_projectionCenter);
SGGeod bottomRight = unproject(invT.map(rect().bottomRight()), m_projectionCenter);
double minRunwayLengthFt = (16 / m_scale) * SG_METER_TO_FEET;
// add 10nm fudge factor
double drawRangeNm = SGGeodesy::distanceNm(m_projectionCenter, topLeft) + 10.0;
//qDebug() << "draw range computed as:" << drawRangeNm;
double drawRangeNm = std::max(SGGeodesy::distanceNm(viewCenter, topLeft),
SGGeodesy::distanceNm(viewCenter, bottomRight));
MapFilter f;
FGPositionedList items = FGPositioned::findWithinRange(m_projectionCenter, drawRangeNm, &f);
FGPositionedList items = FGPositioned::findWithinRange(viewCenter, drawRangeNm, &f);
m_labelRects.clear();
m_labelRects.reserve(items.size());
@ -470,6 +473,7 @@ QPointF BaseDiagram::project(const SGGeod& geod, const SGGeod& center)
y = k * ( cos(ref_lat) * sin(lat) - sin(ref_lat) * cos(lat) * cos(lonDiff) );
}
// flip for top-left origin
return QPointF(x, -y) * r;
}
@ -487,7 +491,9 @@ SGGeod BaseDiagram::unproject(const QPointF& xy, const SGGeod& center)
return center;
}
double x = xy.x(), y = xy.y();
// invert y to balance the equivalent in project()
double x = xy.x(),
y = -xy.y();
lat = asin( cos(c) * sin(ref_lat) + (y * sin(c) * cos(ref_lat)) / rho);
if (ref_lat == (90 * SG_DEGREES_TO_RADIANS)) // north pole