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Plot orbits of planets.

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This commit is contained in:
Jon Beniston
2026-04-07 18:21:28 +01:00
parent 3c3371cf2c
commit 80b5daa929
8 changed files with 207 additions and 100 deletions
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plugins/feature/startracker/startrackergui.cpp
+41 -15
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@@ -172,7 +172,7 @@ bool StarTrackerGUI::handleMessage(const Message& message)
else if (StarTrackerReport::MsgReportSolarSystemPositions::match(message))
{
StarTrackerReport::MsgReportSolarSystemPositions& report = (StarTrackerReport::MsgReportSolarSystemPositions&) message;
updateSolarSystemPositions(report.getNames(), report.getPositions());
updateSolarSystemPositions(report.getNames(), report.getPositions(), report.getOrbit());
return true;
}
else if (StarTrackerReport::MsgReportJupiter::match(message))
@@ -1702,23 +1702,13 @@ static void logScale(QVector3D &p)
p.setZ(r * std::cos(el));
}
QRectF getVisibleRect( QGraphicsView * view )
{
QPointF A = view->mapToScene( QPoint(0, 0) );
QPointF B = view->mapToScene( QPoint(
view->viewport()->width(),
view->viewport()->height() ));
return QRectF( A, B );
}
void StarTrackerGUI::updateSolarSystemPositions(const QStringList &names, const QList<QVector3D> &positions)
void StarTrackerGUI::updateSolarSystemPositions(const QStringList &names, const QList<QVector3D> &positions, const QList<QList<QPointF>> &orbits)
{
const double kmToAU = 6.68459e-9; // Convert position from kM to AU
const double pixelScale = 20.0; // Mercury is 0.4AU. Neptune is 30 AU
bool scale = false;
QPen orbitPen(Qt::gray);
orbitPen.setWidth(0);
for (int i = 0; i < names.size(); i++)
{
@@ -1738,9 +1728,18 @@ void StarTrackerGUI::updateSolarSystemPositions(const QStringList &names, const
QBrush brush(QColor(200, 200, 200));
item = new SolarSystemItem();
item->m_textItem = m_solarSystemScene->addText(name, m_solarSystemLabelFont);
item->m_textItem->setZValue(2);
item->m_scale = getScale(name.toLower());
item->m_pixmapItem = m_solarSystemScene->addPixmap(*pixmap);
item->m_pixmapItem->setOffset(-pixmap->width() / 2, -pixmap->height() / 2);
item->m_pixmapItem->setZValue(1);
if (orbits[i].size() > 0) {
item->m_orbitItem = m_solarSystemScene->addPolygon(QPolygonF(), orbitPen);
} else {
item->m_orbitItem = nullptr;
}
m_solarSystemItems.insert(names[i], item);
scale = true;
}
@@ -1753,6 +1752,33 @@ void StarTrackerGUI::updateSolarSystemPositions(const QStringList &names, const
scaledPos = pixelScale * kmToAU * scaledPos;
}
// Draw an ellipse for planet's orbit
if (item->m_orbitItem)
{
QPolygonF polygon;
for (int j = 0; j < orbits[i].size(); j++)
{
QPointF point = orbits[i][j];
if (m_settings.m_logScale)
{
QVector3D v = {(float) point.x(), (float) point.y(), 0.0f};
logScale(v);
point.setX(v.x());
point.setY(v.y());
}
else
{
point = pixelScale * kmToAU * point;
}
polygon << point;
}
item->m_orbitItem->setPolygon(polygon);
}
// Position label to right
const int textYOffset = m_solarSystemLabelFontMetrics.height();
item->m_pixmapItem->setPos(scaledPos.x(), scaledPos.y());
@@ -1774,6 +1800,7 @@ void StarTrackerGUI::updateSolarSystemPositions(const QStringList &names, const
SolarSystemItem* item = itr.value();
m_solarSystemScene->removeItem(item->m_pixmapItem);
m_solarSystemScene->removeItem(item->m_textItem);
m_solarSystemScene->removeItem(item->m_orbitItem);
delete item;
itr.remove();
}
@@ -1868,7 +1895,6 @@ void StarTrackerGUI::centerOnSolarSystemBody()
if (m_solarSystemItems.contains(selectedBody))
{
SolarSystemItem *item = m_solarSystemItems.value(selectedBody);
//qDebug() << "scene rect" << m_solarSystemScene->sceneRect() << "view scene rect" << ui->image->sceneRect() << "visible rect" << getVisibleRect(ui->image) << "centre on" << selectedBody << item->m_pixmapItem->pos();
ui->image->centerOn(item->m_pixmapItem);
ui->image->setDragMode(QGraphicsView::NoDrag);
}