EquatorialCoordinateGrid::EquatorialCoordinateGrid( SkyComposite *parent )
: CoordinateGrid( parent, i18n("Equatorial Coordinate Grid" ) )
{
KStarsData *data = KStarsData::Instance();
intro();
double eps = 0.1;
double minRa = 0.0;
double maxRa = 23.0;
double dRa = 2.0;
double minDec = -80.0;
double maxDec = 90.0;
double dDec = 20.0;
double dDec2 = 4.0;
double dRa2 = 0.2;
double max, dec, dec2, ra, ra2;
LineList* lineList;
for ( ra = minRa; ra < maxRa; ra += dRa ) {
for ( dec = -90.0; dec < maxDec - eps; dec += dDec ) {
lineList = new LineList();
max = dec + dDec;
if ( max > 90.0 ) max = 90.0;
for ( dec2 = dec; dec2 <= max + eps; dec2 += dDec2 ) {
SkyPoint* p = new SkyPoint( ra, dec2 );
p->EquatorialToHorizontal( data->lst(), data->geo()->lat() );
lineList->append( p );
}
appendLine( lineList );
}
}
for ( dec = minDec; dec < maxDec + eps; dec += dDec ) {
// Do not paint the line on the equator
if ( dec < 0.1 && dec > -0.1 )
continue;
// Adjust point density
int nPoints = int(round( fabs(cos(dec* dms::PI / 180.0)) * dRa / dRa2 ));
if ( nPoints < 5 )
nPoints = 5;
double dRa3 = dRa / nPoints;
for ( ra = minRa; ra < maxRa + eps; ra += dRa ) {
lineList = new LineList();
for ( ra2 = ra; ra2 <= ra + dRa + eps; ra2 += dRa3 ) {
SkyPoint* p = new SkyPoint( ra2, dec );
p->EquatorialToHorizontal( data->lst(), data->geo()->lat() );
lineList->append( p );
}
appendLine( lineList );
}
}
summary();
}
Ecliptic::Ecliptic(SkyComposite *parent ) :
LineListIndex( parent, i18n("Ecliptic") ),
m_label( name() )
{
KStarsData *data = KStarsData::Instance();
KSNumbers num( data->ut().djd() );
dms elat(0.0), elng(0.0);
const double eps = 0.1;
const double minRa = 0.0;
const double maxRa = 23.0;
const double dRa = 2.0;
const double dRa2 = 2. / 5.;
for(double ra = minRa; ra < maxRa; ra += dRa ) {
LineList* lineList = new LineList();
for(double ra2 = ra; ra2 <= ra + dRa + eps; ra2 += dRa2 ) {
elng.setH( ra2 );
SkyPoint* o = new SkyPoint();
o->setFromEcliptic( num.obliquity(), elng, elat );
o->setRA0( o->ra().Hours() );
o->setDec0( o->dec().Degrees() );
o->EquatorialToHorizontal( data->lst(), data->geo()->lat() );
lineList->append( o );
}
appendLine( lineList );
}
}
void LinePath::growList(LineList &list, int by) {
QPen pen( getLineColor(), getLineWidth() );
for (int i = 0; i < by; i++) {
QCanvasLine * line = new QCanvasLine( getCanvas() );
line -> setZ( 0 );
line -> setPen( pen );
line -> setVisible( true );
list.append( line );
}
}