//! Make the first screen position correspond to the second (useful for mouse dragging)
void StelMovementMgr::dragView(int x1, int y1, int x2, int y2)
{
if (dragTimeMode)
{
core->setTimeRate(0);
Vec3d v1, v2;
const StelProjectorP prj = core->getProjection(StelCore::FrameEquinoxEqu);
prj->unProject(x2,y2, v2);
prj->unProject(x1,y1, v1);
v1[2]=0; v1.normalize();
v2[2]=0; v2.normalize();
double angle = (v2^v1)[2];
double deltaDay = angle/(2.*M_PI)*core->getLocalSiderealDayLength();
core->setJD(core->getJD()+deltaDay);
addTimeDragPoint(x2, y2);
}
else
{
Vec3d tempvec1, tempvec2;
const StelProjectorP prj = core->getProjection(StelCore::FrameJ2000);
prj->unProject(x2,y2, tempvec2);
prj->unProject(x1,y1, tempvec1);
double az1, alt1, az2, alt2;
StelUtils::rectToSphe(&az1, &alt1, j2000ToMountFrame(tempvec1));
StelUtils::rectToSphe(&az2, &alt2, j2000ToMountFrame(tempvec2));
panView(az2-az1, alt1-alt2);
}
setFlagTracking(false);
setFlagLockEquPos(false);
}
void PointerCoordinates::draw(StelCore *core)
{
if (!isEnabled())
return;
const StelProjectorP prj = core->getProjection(StelCore::FrameJ2000, StelCore::RefractionAuto);
StelPainter sPainter(prj);
sPainter.setColor(textColor[0], textColor[1], textColor[2], 1.f);
font.setPixelSize(getFontSize());
sPainter.setFont(font);
QPoint p = QCursor::pos(); // get screen coordinates of mouse cursor
Vec3d mousePosition;
float wh = prj->getViewportWidth()/2; // get half of width of the screen
float hh = prj->getViewportHeight()/2; // get half of height of the screen
float mx = p.x()-wh; // point 0 in center of the screen, axis X directed to right
float my = p.y()-hh; // point 0 in center of the screen, axis Y directed to bottom
// calculate position of mouse cursor via position of center of the screen (and invert axis Y)
prj->unProject(prj->getViewportPosX()+wh+mx, prj->getViewportPosY()+hh+1-my, mousePosition);
double dec_j2000, ra_j2000;
StelUtils::rectToSphe(&ra_j2000,&dec_j2000,mousePosition); // Calculate RA/DE (J2000.0) and show it...
QString coordsText = QString("%1/%2").arg(StelUtils::radToHmsStr(ra_j2000, true)).arg(StelUtils::radToDmsStr(dec_j2000, true));
sPainter.drawText(getCoordinatesPlace(coordsText).first, getCoordinatesPlace(coordsText).second, coordsText);
}
/*************************************************************************
Find in a "clever" way an object from its equatorial position
*************************************************************************/
StelObjectP StelObjectMgr::cleverFind(const StelCore* core, int x, int y) const
{
Vec3d v;
const StelProjectorP prj = core->getProjection(StelCore::FrameJ2000);
if (prj->unProject(x,y,v))
{
// Nick Fedoseev patch: improve click match for refracted coordinates
Vec3d win;
prj->project(v,win);
float dx = x - win.v[0];
float dy = y - win.v[1];
prj->unProject(x+dx, y+dy, v);
return cleverFind(core, v);
}
return StelObjectP();
}
void AngleMeasure::handleMouseClicks(class QMouseEvent* event)
{
if (!flagShowAngleMeasure)
{
event->setAccepted(false);
return;
}
if (event->type()==QEvent::MouseButtonPress && event->button()==Qt::LeftButton)
{
const StelProjectorP prj = StelApp::getInstance().getCore()->getProjection(StelCore::FrameEquinoxEqu);
prj->unProject(event->x(),event->y(),startPoint);
// first click reset the line... only draw it after we've dragged a little.
if (!dragging)
{
lineVisible = false;
endPoint = startPoint;
}
else
lineVisible = true;
dragging = true;
calculateEnds();
event->setAccepted(true);
return;
}
else if (event->type()==QEvent::MouseButtonRelease && event->button()==Qt::LeftButton)
{
dragging = false;
calculateEnds();
event->setAccepted(true);
return;
}
else if (event->type()==QEvent::MouseButtonPress && event->button()==Qt::RightButton)
{
const StelProjectorP prj = StelApp::getInstance().getCore()->getProjection(StelCore::FrameEquinoxEqu);
prj->unProject(event->x(),event->y(),endPoint);
calculateEnds();
event->setAccepted(true);
return;
}
event->setAccepted(false);
}
bool AngleMeasure::handleMouseMoves(int x, int y, Qt::MouseButtons)
{
if (dragging)
{
const StelProjectorP prj = StelApp::getInstance().getCore()->getProjection(StelCore::FrameEquinoxEqu);
prj->unProject(x,y,endPoint);
{ // Nick Fedoseev patch: improve click match
Vec3d win;
prj->project(endPoint,win);
float dx = x - win.v[0];
float dy = y - win.v[1];
prj->unProject(x+dx, y+dy, endPoint);
}
const StelProjectorP prjHor = StelApp::getInstance().getCore()->getProjection(StelCore::FrameAltAz, StelCore::RefractionOff);
prjHor->unProject(x,y,endPointHor);
calculateEnds();
lineVisible = true;
return true;
}
else
return false;
}
bool AngleMeasure::handleMouseMoves(int x, int y, Qt::MouseButtons)
{
if (dragging)
{
const StelProjectorP prj = StelApp::getInstance().getCore()->getProjection(StelCore::FrameEquinoxEqu);
prj->unProject(x,y,endPoint);
calculateEnds();
lineVisible = true;
return true;
}
else
return false;
}
void SlewDialog::getCenterInfo()
{
StelCore *core = StelApp::getInstance().getCore();
const StelProjectorP projector = core->getProjection(StelCore::FrameEquinoxEqu);
Vec3d centerPosition;
Vec2f center = projector->getViewportCenter();
projector->unProject(center[0], center[1], centerPosition);
double dec_j2000 = 0;
double ra_j2000 = 0;
StelUtils::rectToSphe(&ra_j2000,&dec_j2000,core->equinoxEquToJ2000(centerPosition));
ui->spinBoxRA->setRadians(ra_j2000);
ui->spinBoxDec->setRadians(dec_j2000);
}
void AngleMeasure::handleMouseClicks(class QMouseEvent* event)
{
if (!flagShowAngleMeasure)
{
event->setAccepted(false);
return;
}
if (event->type()==QEvent::MouseButtonPress && event->button()==Qt::LeftButton)
{
const StelProjectorP prj = StelApp::getInstance().getCore()->getProjection(StelCore::FrameEquinoxEqu);
prj->unProject(event->x(),event->y(),startPoint);
{ // Nick Fedoseev patch: improve click match
Vec3d win;
prj->project(startPoint,win);
float dx = event->x() - win.v[0];
float dy = event->y() - win.v[1];
prj->unProject(event->x()+dx, event->y()+dy, startPoint);
}
const StelProjectorP prjHor = StelApp::getInstance().getCore()->getProjection(StelCore::FrameAltAz, StelCore::RefractionOff);
prjHor->unProject(event->x(),event->y(),startPointHor);
// first click reset the line... only draw it after we've dragged a little.
if (!dragging)
{
lineVisible = false;
endPoint = startPoint;
endPointHor=startPointHor;
}
else
lineVisible = true;
dragging = true;
calculateEnds();
event->setAccepted(true);
return;
}
else if (event->type()==QEvent::MouseButtonRelease && event->button()==Qt::LeftButton)
{
dragging = false;
calculateEnds();
event->setAccepted(true);
return;
}
else if (event->type()==QEvent::MouseButtonPress && event->button()==Qt::RightButton)
{
const StelProjectorP prj = StelApp::getInstance().getCore()->getProjection(StelCore::FrameEquinoxEqu);
prj->unProject(event->x(),event->y(),endPoint);
{ // Nick Fedoseev patch: improve click match
Vec3d win;
prj->project(endPoint,win);
float dx = event->x() - win.v[0];
float dy = event->y() - win.v[1];
prj->unProject(event->x()+dx, event->y()+dy, endPoint);
}
const StelProjectorP prjHor = StelApp::getInstance().getCore()->getProjection(StelCore::FrameAltAz, StelCore::RefractionOff);
prjHor->unProject(event->x(),event->y(),endPointHor);
calculateEnds();
event->setAccepted(true);
return;
}
event->setAccepted(false);
}
void PointerCoordinates::draw(StelCore *core)
{
if (!isEnabled())
return;
const StelProjectorP prj = core->getProjection(StelCore::FrameJ2000, StelCore::RefractionAuto);
StelPainter sPainter(prj);
sPainter.setColor(textColor[0], textColor[1], textColor[2], 1.f);
font.setPixelSize(getFontSize());
sPainter.setFont(font);
QPoint p = StelMainView::getInstance().getMousePos(); // get screen coordinates of mouse cursor
Vec3d mousePosition;
float wh = prj->getViewportWidth()/2.; // get half of width of the screen
float hh = prj->getViewportHeight()/2.; // get half of height of the screen
float mx = p.x()-wh; // point 0 in center of the screen, axis X directed to right
float my = p.y()-hh; // point 0 in center of the screen, axis Y directed to bottom
// calculate position of mouse cursor via position of center of the screen (and invert axis Y)
// If coordinates are invalid, don't draw them.
bool coordsValid=false;
coordsValid = prj->unProject(prj->getViewportPosX()+wh+mx, prj->getViewportPosY()+hh+1-my, mousePosition);
{ // Nick Fedoseev patch
Vec3d win;
prj->project(mousePosition,win);
float dx = prj->getViewportPosX()+wh+mx - win.v[0];
float dy = prj->getViewportPosY()+hh+1-my - win.v[1];
coordsValid = prj->unProject(prj->getViewportPosX()+wh+mx+dx, prj->getViewportPosY()+hh+1-my+dy, mousePosition);
}
if (!coordsValid)
return;
bool withDecimalDegree = StelApp::getInstance().getFlagShowDecimalDegrees();
bool useSouthAzimuth = StelApp::getInstance().getFlagSouthAzimuthUsage();
QString coordsSystem, cxt, cyt;
double cx, cy;
switch (getCurrentCoordinateSystem())
{
case RaDecJ2000:
{
StelUtils::rectToSphe(&cx,&cy,mousePosition); // Calculate RA/DE (J2000.0) and show it...
coordsSystem = qc_("RA/Dec (J2000.0)", "abbreviated in the plugin");
if (withDecimalDegree)
{
cxt = StelUtils::radToDecDegStr(cx, 5, false, true);
cyt = StelUtils::radToDecDegStr(cy);
}
else
{
cxt = StelUtils::radToHmsStr(cx, true);
cyt = StelUtils::radToDmsStr(cy, true);
}
break;
}
case RaDec:
{
StelUtils::rectToSphe(&cx,&cy,core->j2000ToEquinoxEqu(mousePosition)); // Calculate RA/DE and show it...
coordsSystem = qc_("RA/Dec", "abbreviated in the plugin");
if (withDecimalDegree)
{
cxt = StelUtils::radToDecDegStr(cx, 5, false, true);
cyt = StelUtils::radToDecDegStr(cy);
}
else
{
cxt = StelUtils::radToHmsStr(cx, true);
cyt = StelUtils::radToDmsStr(cy, true);
}
break;
}
case AltAzi:
{
StelUtils::rectToSphe(&cy,&cx,core->j2000ToAltAz(mousePosition, StelCore::RefractionAuto));
float direction = 3.; // N is zero, E is 90 degrees
if (useSouthAzimuth)
direction = 2.;
cy = direction*M_PI - cy;
if (cy > M_PI*2)
cy -= M_PI*2;
coordsSystem = qc_("Az/Alt", "abbreviated in the plugin");
if (withDecimalDegree)
{
cxt = StelUtils::radToDecDegStr(cy);
cyt = StelUtils::radToDecDegStr(cx);
}
else
{
cxt = StelUtils::radToDmsStr(cy);
cyt = StelUtils::radToDmsStr(cx);
}
break;
}
case Galactic:
{
StelUtils::rectToSphe(&cx,&cy,core->j2000ToGalactic(mousePosition)); // Calculate galactic position and show it...
coordsSystem = qc_("Gal. Long/Lat", "abbreviated in the plugin");
if (withDecimalDegree)
{
cxt = StelUtils::radToDecDegStr(cx);
cyt = StelUtils::radToDecDegStr(cy);
}
else
{
cxt = StelUtils::radToDmsStr(cx, true);
cyt = StelUtils::radToDmsStr(cy, true);
}
break;
}
case Ecliptic:
{
double lambda, beta;
StelUtils::rectToSphe(&cx,&cy,core->j2000ToEquinoxEqu(mousePosition));
StelUtils::equToEcl(cx, cy, core->getCurrentPlanet()->getRotObliquity(core->getJDE()), &lambda, &beta); // Calculate ecliptic position and show it...
if (lambda<0) lambda+=2.0*M_PI;
coordsSystem = qc_("Ecl. Long/Lat", "abbreviated in the plugin");
if (withDecimalDegree)
{
cxt = StelUtils::radToDecDegStr(lambda);
cyt = StelUtils::radToDecDegStr(beta);
}
else
{
cxt = StelUtils::radToDmsStr(lambda, true);
cyt = StelUtils::radToDmsStr(beta, true);
}
break;
}
case EclipticJ2000:
{
double lambda, beta;
StelUtils::rectToSphe(&cx,&cy, mousePosition);
StelUtils::equToEcl(cx, cy, core->getCurrentPlanet()->getRotObliquity(2451545.0), &lambda, &beta); // Calculate ecliptic position and show it...
if (lambda<0) lambda+=2.0*M_PI;
coordsSystem = qc_("Ecl. Long/Lat (J2000.0)", "abbreviated in the plugin");
if (withDecimalDegree)
{
cxt = StelUtils::radToDecDegStr(lambda);
cyt = StelUtils::radToDecDegStr(beta);
}
else
{
cxt = StelUtils::radToDmsStr(lambda, true);
cyt = StelUtils::radToDmsStr(beta, true);
}
break;
}
case HourAngle:
{
Vec3d v = core->j2000ToAltAz(mousePosition, StelCore::RefractionAuto);
StelUtils::rectToSphe(&cx,&cy,Mat4d::zrotation(-core->getLocalSiderealTime())*core->altAzToEquinoxEqu(v, StelCore::RefractionOff));
cx = 2.*M_PI-cx;
coordsSystem = qc_("HA/Dec", "abbreviated in the plugin");
if (withDecimalDegree)
{
double ha_sidereal = cx*12/M_PI;
if (ha_sidereal>24.)
ha_sidereal -= 24.;
cxt = QString("%1h").arg(ha_sidereal, 0, 'f', 5);
cyt = StelUtils::radToDecDegStr(cy);
}
else
{
cxt = StelUtils::radToHmsStr(cx);
cyt = StelUtils::radToDmsStr(cy);
}
break;
}
}
QString coordsText = QString("%1: %2/%3").arg(coordsSystem).arg(cxt).arg(cyt);
sPainter.drawText(getCoordinatesPlace(coordsText).first, getCoordinatesPlace(coordsText).second, coordsText);
}
//! Draw the sky grid in the current frame
void SkyGrid::draw(const StelCore* core) const
{
const StelProjectorP prj = core->getProjection(frameType, frameType!=StelCore::FrameAltAz ? StelCore::RefractionAuto : StelCore::RefractionOff);
if (!fader.getInterstate())
return;
bool withDecimalDegree = dynamic_cast<StelGui*>(StelApp::getInstance().getGui())->getFlagShowDecimalDegrees();
// Look for all meridians and parallels intersecting with the disk bounding the viewport
// Check whether the pole are in the viewport
bool northPoleInViewport = false;
bool southPoleInViewport = false;
Vec3f win;
if (prj->project(Vec3f(0,0,1), win) && prj->checkInViewport(win))
northPoleInViewport = true;
if (prj->project(Vec3f(0,0,-1), win) && prj->checkInViewport(win))
southPoleInViewport = true;
// Get the longitude and latitude resolution at the center of the viewport
Vec3d centerV;
prj->unProject(prj->getViewportPosX()+prj->getViewportWidth()/2, prj->getViewportPosY()+prj->getViewportHeight()/2+1, centerV);
double lon2, lat2;
StelUtils::rectToSphe(&lon2, &lat2, centerV);
const double gridStepParallelRad = M_PI/180.*getClosestResolutionDMS(prj->getPixelPerRadAtCenter());
double gridStepMeridianRad;
if (northPoleInViewport || southPoleInViewport)
gridStepMeridianRad = (frameType==StelCore::FrameAltAz || frameType==StelCore::FrameGalactic) ? M_PI/180.* 10. : M_PI/180.* 15.;
else
{
const double closetResLon = (frameType==StelCore::FrameAltAz || frameType==StelCore::FrameGalactic) ? getClosestResolutionDMS(prj->getPixelPerRadAtCenter()*std::cos(lat2)) : getClosestResolutionHMS(prj->getPixelPerRadAtCenter()*std::cos(lat2));
gridStepMeridianRad = M_PI/180.* ((northPoleInViewport || southPoleInViewport) ? 15. : closetResLon);
}
// Get the bounding halfspace
const SphericalCap& viewPortSphericalCap = prj->getBoundingCap();
// Compute the first grid starting point. This point is close to the center of the screen
// and lays at the intersection of a meridien and a parallel
lon2 = gridStepMeridianRad*((int)(lon2/gridStepMeridianRad+0.5));
lat2 = gridStepParallelRad*((int)(lat2/gridStepParallelRad+0.5));
Vec3d firstPoint;
StelUtils::spheToRect(lon2, lat2, firstPoint);
firstPoint.normalize();
// Q_ASSERT(viewPortSphericalCap.contains(firstPoint));
// Initialize a painter and set openGL state
StelPainter sPainter(prj);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // Normal transparency mode
Vec4f textColor(color[0], color[1], color[2], 0);
sPainter.setColor(color[0],color[1],color[2], fader.getInterstate());
textColor*=2;
textColor[3]=fader.getInterstate();
sPainter.setFont(font);
ViewportEdgeIntersectCallbackData userData(&sPainter);
userData.textColor = textColor;
userData.frameType = frameType;
/////////////////////////////////////////////////
// Draw all the meridians (great circles)
SphericalCap meridianSphericalCap(Vec3d(1,0,0), 0);
Mat4d rotLon = Mat4d::zrotation(gridStepMeridianRad);
Vec3d fpt = firstPoint;
Vec3d p1, p2;
int maxNbIter = (int)(M_PI/gridStepMeridianRad);
int i;
for (i=0; i<maxNbIter; ++i)
{
StelUtils::rectToSphe(&lon2, &lat2, fpt);
userData.raAngle = lon2;
meridianSphericalCap.n = fpt^Vec3d(0,0,1);
meridianSphericalCap.n.normalize();
if (!SphericalCap::intersectionPoints(viewPortSphericalCap, meridianSphericalCap, p1, p2))
{
if (viewPortSphericalCap.d<meridianSphericalCap.d && viewPortSphericalCap.contains(meridianSphericalCap.n))
{
// The meridian is fully included in the viewport, draw it in 3 sub-arcs to avoid length > 180.
const Mat4d& rotLon120 = Mat4d::rotation(meridianSphericalCap.n, 120.*M_PI/180.);
Vec3d rotFpt=fpt;
rotFpt.transfo4d(rotLon120);
Vec3d rotFpt2=rotFpt;
rotFpt2.transfo4d(rotLon120);
sPainter.drawGreatCircleArc(fpt, rotFpt, NULL, viewportEdgeIntersectCallback, &userData);
sPainter.drawGreatCircleArc(rotFpt, rotFpt2, NULL, viewportEdgeIntersectCallback, &userData);
sPainter.drawGreatCircleArc(rotFpt2, fpt, NULL, viewportEdgeIntersectCallback, &userData);
fpt.transfo4d(rotLon);
continue;
}
else
break;
}
Vec3d middlePoint = p1+p2;
middlePoint.normalize();
if (!viewPortSphericalCap.contains(middlePoint))
middlePoint*=-1.;
// Draw the arc in 2 sub-arcs to avoid lengths > 180 deg
sPainter.drawGreatCircleArc(p1, middlePoint, NULL, viewportEdgeIntersectCallback, &userData);
sPainter.drawGreatCircleArc(p2, middlePoint, NULL, viewportEdgeIntersectCallback, &userData);
fpt.transfo4d(rotLon);
}
if (i!=maxNbIter)
{
rotLon = Mat4d::zrotation(-gridStepMeridianRad);
fpt = firstPoint;
fpt.transfo4d(rotLon);
for (int j=0; j<maxNbIter-i; ++j)
{
StelUtils::rectToSphe(&lon2, &lat2, fpt);
userData.raAngle = lon2;
meridianSphericalCap.n = fpt^Vec3d(0,0,1);
meridianSphericalCap.n.normalize();
if (!SphericalCap::intersectionPoints(viewPortSphericalCap, meridianSphericalCap, p1, p2))
break;
Vec3d middlePoint = p1+p2;
middlePoint.normalize();
if (!viewPortSphericalCap.contains(middlePoint))
middlePoint*=-1;
sPainter.drawGreatCircleArc(p1, middlePoint, NULL, viewportEdgeIntersectCallback, &userData);
sPainter.drawGreatCircleArc(p2, middlePoint, NULL, viewportEdgeIntersectCallback, &userData);
fpt.transfo4d(rotLon);
}
}
/////////////////////////////////////////////////
// Draw all the parallels (small circles)
SphericalCap parallelSphericalCap(Vec3d(0,0,1), 0);
rotLon = Mat4d::rotation(firstPoint^Vec3d(0,0,1), gridStepParallelRad);
fpt = firstPoint;
maxNbIter = (int)(M_PI/gridStepParallelRad)-1;
for (i=0; i<maxNbIter; ++i)
{
StelUtils::rectToSphe(&lon2, &lat2, fpt);
if (withDecimalDegree)
userData.text = StelUtils::radToDecDegStr(lat2);
else
userData.text = StelUtils::radToDmsStrAdapt(lat2);
parallelSphericalCap.d = fpt[2];
if (parallelSphericalCap.d>0.9999999)
break;
const Vec3d rotCenter(0,0,parallelSphericalCap.d);
if (!SphericalCap::intersectionPoints(viewPortSphericalCap, parallelSphericalCap, p1, p2))
{
if ((viewPortSphericalCap.d<parallelSphericalCap.d && viewPortSphericalCap.contains(parallelSphericalCap.n))
|| (viewPortSphericalCap.d<-parallelSphericalCap.d && viewPortSphericalCap.contains(-parallelSphericalCap.n)))
{
// The parallel is fully included in the viewport, draw it in 3 sub-arcs to avoid lengths >= 180 deg
static const Mat4d rotLon120 = Mat4d::zrotation(120.*M_PI/180.);
Vec3d rotFpt=fpt;
rotFpt.transfo4d(rotLon120);
Vec3d rotFpt2=rotFpt;
rotFpt2.transfo4d(rotLon120);
sPainter.drawSmallCircleArc(fpt, rotFpt, rotCenter, viewportEdgeIntersectCallback, &userData);
sPainter.drawSmallCircleArc(rotFpt, rotFpt2, rotCenter, viewportEdgeIntersectCallback, &userData);
sPainter.drawSmallCircleArc(rotFpt2, fpt, rotCenter, viewportEdgeIntersectCallback, &userData);
fpt.transfo4d(rotLon);
continue;
}
else
break;
}
// Draw the arc in 2 sub-arcs to avoid lengths > 180 deg
Vec3d middlePoint = p1-rotCenter+p2-rotCenter;
middlePoint.normalize();
middlePoint*=(p1-rotCenter).length();
middlePoint+=rotCenter;
if (!viewPortSphericalCap.contains(middlePoint))
{
middlePoint-=rotCenter;
middlePoint*=-1.;
middlePoint+=rotCenter;
}
sPainter.drawSmallCircleArc(p1, middlePoint, rotCenter, viewportEdgeIntersectCallback, &userData);
sPainter.drawSmallCircleArc(p2, middlePoint, rotCenter, viewportEdgeIntersectCallback, &userData);
fpt.transfo4d(rotLon);
}
if (i!=maxNbIter)
{
rotLon = Mat4d::rotation(firstPoint^Vec3d(0,0,1), -gridStepParallelRad);
fpt = firstPoint;
fpt.transfo4d(rotLon);
for (int j=0; j<maxNbIter-i; ++j)
{
StelUtils::rectToSphe(&lon2, &lat2, fpt);
if (withDecimalDegree)
userData.text = StelUtils::radToDecDegStr(lat2);
else
userData.text = StelUtils::radToDmsStrAdapt(lat2);
parallelSphericalCap.d = fpt[2];
const Vec3d rotCenter(0,0,parallelSphericalCap.d);
if (!SphericalCap::intersectionPoints(viewPortSphericalCap, parallelSphericalCap, p1, p2))
{
if ((viewPortSphericalCap.d<parallelSphericalCap.d && viewPortSphericalCap.contains(parallelSphericalCap.n))
|| (viewPortSphericalCap.d<-parallelSphericalCap.d && viewPortSphericalCap.contains(-parallelSphericalCap.n)))
{
// The parallel is fully included in the viewport, draw it in 3 sub-arcs to avoid lengths >= 180 deg
static const Mat4d rotLon120 = Mat4d::zrotation(120.*M_PI/180.);
Vec3d rotFpt=fpt;
rotFpt.transfo4d(rotLon120);
Vec3d rotFpt2=rotFpt;
rotFpt2.transfo4d(rotLon120);
sPainter.drawSmallCircleArc(fpt, rotFpt, rotCenter, viewportEdgeIntersectCallback, &userData);
sPainter.drawSmallCircleArc(rotFpt, rotFpt2, rotCenter, viewportEdgeIntersectCallback, &userData);
sPainter.drawSmallCircleArc(rotFpt2, fpt, rotCenter, viewportEdgeIntersectCallback, &userData);
fpt.transfo4d(rotLon);
continue;
}
else
break;
}
// Draw the arc in 2 sub-arcs to avoid lengths > 180 deg
Vec3d middlePoint = p1-rotCenter+p2-rotCenter;
middlePoint.normalize();
middlePoint*=(p1-rotCenter).length();
middlePoint+=rotCenter;
if (!viewPortSphericalCap.contains(middlePoint))
{
middlePoint-=rotCenter;
middlePoint*=-1.;
middlePoint+=rotCenter;
}
sPainter.drawSmallCircleArc(p1, middlePoint, rotCenter, viewportEdgeIntersectCallback, &userData);
sPainter.drawSmallCircleArc(p2, middlePoint, rotCenter, viewportEdgeIntersectCallback, &userData);
fpt.transfo4d(rotLon);
}
}
}
void Atmosphere::computeColor
(double JD, Vec3d sunPos, Vec3d moonPos, float moonPhase, StelCore* core, float eclipseFac,
float latitude, float altitude, float temperature, float relativeHumidity)
{
// We lazily initialize vertex buffer at the first draw,
// so we can only call this after that.
// We also need a renderer reference (again lazily from draw()) to
// construct index buffers as they might change at every call to computeColor().
if(NULL == renderer) {return;}
const StelProjectorP prj = core->getProjection(StelCore::FrameAltAz, StelCore::RefractionOff);
if (viewport != prj->getViewport())
{
// The viewport changed: update the number of points in the grid
updateGrid(prj);
}
eclipseFactor = eclipseFac;
if(eclipseFac < 0.0001f)
eclipseFactor = 0.0001f;
// No need to calculate if not visible
if (!fader.getInterstate())
{
averageLuminance = 0.001f + lightPollutionLuminance;
return;
}
// Calculate the atmosphere RGB for each point of the grid
if (myisnan(sunPos.length()))
sunPos.set(0.,0.,-1.*AU);
if (myisnan(moonPos.length()))
moonPos.set(0.,0.,-1.*AU);
sunPos.normalize();
moonPos.normalize();
float sun_pos[3];
sun_pos[0] = sunPos[0];
sun_pos[1] = sunPos[1];
sun_pos[2] = sunPos[2];
float moon_pos[3];
moon_pos[0] = moonPos[0];
moon_pos[1] = moonPos[1];
moon_pos[2] = moonPos[2];
sky.setParamsv(sun_pos, 5.f);
skyb.setLocation(latitude * M_PI/180., altitude, temperature, relativeHumidity);
skyb.setSunMoon(moon_pos[2], sun_pos[2]);
// Calculate the date from the julian day.
int year, month, day;
StelUtils::getDateFromJulianDay(JD, &year, &month, &day);
skyb.setDate(year, month, moonPhase);
// Variables used to compute the average sky luminance
double sum_lum = 0.;
Vec3d point(1., 0., 0.);
skylightStruct2 b2;
float lumi;
vertexGrid->unlock();
// Compute the sky color for every point above the ground
for (int i=0; i<(1+skyResolutionX)*(1+skyResolutionY); ++i)
{
const Vec2f position = vertexGrid->getVertex(i).position;
prj->unProject(position[0], position[1], point);
Q_ASSERT(fabs(point.lengthSquared()-1.0) < 1e-10);
if (point[2]<=0)
{
point[2] = -point[2];
// The sky below the ground is the symmetric of the one above :
// it looks nice and gives proper values for brightness estimation
}
// Use the Skybright.cpp 's models for brightness which gives better results.
lumi = skyb.getLuminance(moon_pos[0]*point[0]+moon_pos[1]*point[1]+moon_pos[2]*point[2],
sun_pos[0]*point[0]+sun_pos[1]*point[1]+sun_pos[2]*point[2],
point[2]);
lumi *= eclipseFactor;
// Add star background luminance
lumi += 0.0001;
// Multiply by the input scale of the ToneConverter (is not done automatically by the xyYtoRGB method called later)
//lumi*=eye->getInputScale();
// Add the light pollution luminance AFTER the scaling to avoid scaling it because it is the cause
// of the scaling itself
lumi += lightPollutionLuminance;
// Store for later statistics
sum_lum+=lumi;
Q_ASSERT_X(NULL != vertexGrid, Q_FUNC_INFO,
"Vertex buffer not initialized when setting colors");
// Now need to compute the xy part of the color component
// This is done in a GLSL shader if possible
if(NULL != shader)
{
// Store the back projected position + luminance in the input color to the shader
const Vec4f color = Vec4f(point[0], point[1], point[2], lumi);
vertexGrid->setVertex(i, Vertex(position, color));
continue;
}
// Shaderless fallback
if (lumi > 0.01)
{
// Use the Skylight model for the color
b2.pos[0] = point[0];
b2.pos[1] = point[1];
b2.pos[2] = point[2];
sky.getxyYValuev(b2);
}
else
{
// Too dark to see atmosphere color, don't bother computing it
b2.color[0] = 0.25;
b2.color[1] = 0.25;
}
const Vec4f color = Vec4f(b2.color[0], b2.color[1], lumi, 1.0f);
vertexGrid->setVertex(i, Vertex(position, color));
}
vertexGrid->lock();
// Update average luminance
averageLuminance = sum_lum/((1+skyResolutionX)*(1+skyResolutionY));
}
