asteroidsitem.cpp

/*
    SPDX-FileCopyrightText: 2016 Artem Fedoskin <afedoskin3@gmail.com>
    SPDX-License-Identifier: GPL-2.0-or-later
*/
 
#include "asteroidsitem.h"
 
#include "Options.h"
#include "projections/projector.h"
#include "ksasteroid.h"
 
#include "skynodes/planetnode.h"
#include "skynodes/pointsourcenode.h"
#include "kstarslite/skyitems/rootnode.h"
 
#include "labelsitem.h"
 
AsteroidsItem::AsteroidsItem(const QList<SkyObject *> &asteroidsList, RootNode *rootNode)
    : SkyItem(LabelsItem::label_t::ASTEROID_LABEL, rootNode), m_asteroidsList(asteroidsList)
{
    recreateList();
}
 
void AsteroidsItem::recreateList()
{
    //Delete all child nodes
    while (QSGNode *n = firstChild())
    {
        removeChildNode(n);
        delete n;
    }
 
    foreach (SkyObject *asteroid, m_asteroidsList)
    {
        KSAsteroid *ast = static_cast<KSAsteroid *>(asteroid);
        if (ast->image().isNull() == false)
        {
            appendChildNode(new PlanetNode(ast, rootNode(), labelType()));
        }
        else
        {
            appendChildNode(new PointSourceNode(ast, rootNode(), labelType()));
        }
    }
}
 
void AsteroidsItem::update()
{
    QSGNode *n = firstChild();
    while (n != 0)
    {
        SkyNode *pNode = static_cast<SkyNode *>(n);
        n              = n->nextSibling();
 
        bool hideLabels =
            !Options::showAsteroidNames() || (SkyMapLite::Instance()->isSlewing() && Options::hideLabels());
 
        double lgmin         = log10(MINZOOM);
        double lgmax         = log10(MAXZOOM);
        double lgz           = log10(Options::zoomFactor());
        double labelMagLimit = 2.5 + Options::asteroidLabelDensity() / 5.0;
        labelMagLimit += (15.0 - labelMagLimit) * (lgz - lgmin) / (lgmax - lgmin);
        if (labelMagLimit > 10.0)
            labelMagLimit = 10.0;
        //printf("labelMagLim = %.1f\n", labelMagLimit );
 
        KSAsteroid *ast = static_cast<KSAsteroid *>(pNode->skyObject());
 
        bool drawLabel = false;
 
        if (ast->mag() > Options::magLimitAsteroid() || std::isnan(ast->mag()) != 0)
        {
            pNode->hide();
            continue;
        }
        if (!(hideLabels || ast->mag() >= labelMagLimit))
        {
            drawLabel = true;
        }
        pNode->update(drawLabel);
    }
}