File indexing completed on 2025-01-19 09:45:59

 /*
     SPDX-FileCopyrightText: 2005 Thomas Kabelmann <thomas.kabelmann@gmx.de>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "horizoncomponent.h"
 
 #include "dms.h"
 #include "kstarsdata.h"
 #include "Options.h"
 #include "skylabeler.h"
 #ifdef KSTARS_LITE
 #include "skymaplite.h"
 #else
 #include "skymap.h"
 #endif
 #include "skypainter.h"
 #include "projections/projector.h"
 
 #include <QPointF>
 
 #define NCIRCLE 360 //number of points used to define equator, ecliptic and horizon
 
 HorizonComponent::HorizonComponent(SkyComposite *parent) : PointListComponent(parent)
 {
     KStarsData *data = KStarsData::Instance();
     emitProgressText(i18n("Creating horizon"));
 
     //Define Horizon
     for (unsigned int i = 0; i < NCIRCLE; ++i)
     {
         std::shared_ptr<SkyPoint> o(new SkyPoint());
 
         o->setAz(i * 360. / NCIRCLE);
         o->setAlt(0.0);
 
         o->HorizontalToEquatorial(data->lst(), data->geo()->lat());
         pointList().append(o);
     }
 }
 
 bool HorizonComponent::selected()
 {
     return Options::showHorizon() || Options::showGround();
 }
 
 void HorizonComponent::update(KSNumbers *)
 {
     if (!selected())
         return;
 
     KStarsData *data = KStarsData::Instance();
 
     for (auto &p : pointList())
     {
         p->HorizontalToEquatorial(data->lst(), data->geo()->lat());
     }
 }
 
 //Only half of the Horizon circle is ever valid, the invalid half is "behind" the observer.
 //To select the valid half, we start with the azimuth of the central focus point.
 //The valid horizon points have azimuth between this az +- 90
 //This is true for Equatorial or Horizontal coordinates
 void HorizonComponent::draw(SkyPainter *skyp)
 {
     if (!selected())
         return;
 
     KStarsData *data = KStarsData::Instance();
 
     skyp->setPen(QPen(QColor(data->colorScheme()->colorNamed("HorzColor")), 2, Qt::SolidLine));
 
     if (Options::showGround())
         skyp->setBrush(QColor(data->colorScheme()->colorNamed("HorzColor")));
     else
         skyp->setBrush(Qt::NoBrush);
 
     SkyPoint labelPoint;
     bool drawLabel;
     skyp->drawHorizon(Options::showGround(), &labelPoint, &drawLabel);
 
     if (drawLabel)
     {
         SkyPoint labelPoint2;
         labelPoint2.setAlt(0.0);
         labelPoint2.setAz(labelPoint.az().Degrees() + 1.0);
         labelPoint2.HorizontalToEquatorial(data->lst(), data->geo()->lat());
     }
 
     drawCompassLabels();
 }
 
 void HorizonComponent::drawCompassLabels()
 {
 #ifndef KSTARS_LITE
     SkyPoint c;
     QPointF cpoint;
     bool visible;
 
     const Projector *proj = SkyMap::Instance()->projector();
     KStarsData *data      = KStarsData::Instance();
 
     SkyLabeler *skyLabeler = SkyLabeler::Instance();
     // Set proper color for labels
     QColor color(data->colorScheme()->colorNamed("CompassColor"));
     skyLabeler->setPen(QPen(QBrush(color), 1, Qt::SolidLine));
 
     double az = -0.01;
     static QString name[8];
     name[0] = i18nc("Northeast", "NE");
     name[1] = i18nc("East", "E");
     name[2] = i18nc("Southeast", "SE");
     name[3] = i18nc("South", "S");
     name[4] = i18nc("Southwest", "SW");
     name[5] = i18nc("West", "W");
     name[6] = i18nc("Northwest", "NW");
     name[7] = i18nc("North", "N");
 
     for (const auto &item : name)
     {
         az += 45.0;
         c.setAz(az);
         c.setAlt(0.0);
         if (!Options::useAltAz())
         {
             c.HorizontalToEquatorial(data->lst(), data->geo()->lat());
         }
 
         cpoint = proj->toScreen(&c, false, &visible);
         if (visible && proj->onScreen(cpoint))
         {
             skyLabeler->drawGuideLabel(cpoint, item, 0.0);
         }
     }
 #endif
 }