/// <summary>
/// Draws star name
/// </summary>
private void DrawStarName(IMapContext map, PointF point, Star s, float diam)
{
var fontStarNames = settings.Get <Font>("StarsLabelsFont");
// Star has proper name
if (map.ViewAngle < limitProperNames && settings.Get <bool>("StarsProperNames") && s.ProperName != null)
{
map.DrawObjectCaption(fontStarNames, brushStarNames, s.ProperName, point, diam);
return;
}
// Star has Bayer name (greek letter)
if (map.ViewAngle < limitBayerNames)
{
string bayerName = s.BayerName;
if (bayerName != null)
{
map.DrawObjectCaption(fontStarNames, brushStarNames, bayerName, point, diam);
return;
}
}
// Star has Flamsteed number
if (map.ViewAngle < limitFlamsteedNames)
{
string flamsteedNumber = s.FlamsteedNumber;
if (flamsteedNumber != null)
{
map.DrawObjectCaption(fontStarNames, brushStarNames, flamsteedNumber, point, diam);
return;
}
}
// Star has variable id
if (map.ViewAngle < limitVarNames && s.VariableName != null)
{
string varName = s.VariableName.Split(' ')[0];
if (!varName.All(char.IsDigit))
{
map.DrawObjectCaption(fontStarNames, brushStarNames, varName, point, diam);
return;
}
}
// Star doesn't have any names
if (map.ViewAngle < 2)
{
map.DrawObjectCaption(fontStarNames, brushStarNames, $"HR {s.Number}", point, diam);
}
}
private void DrawLabels(IMapContext map, Track track)
{
var brushLabel = new SolidBrush(track.Color);
double trackStep = track.Step;
double stepLabels = track.LabelsStep.TotalDays;
double coeff = map.DiagonalCoefficient();
int each = (int)(stepLabels / trackStep);
double jd = track.From;
for (int i = 0; i < track.Points.Count; i++)
{
if (i % each == 0 || i == track.Points.Count - 1)
{
var tp = track.Points[i];
double ad = Angle.Separation(tp.Horizontal, map.Center);
if (ad < map.ViewAngle * coeff)
{
PointF p = map.Project(tp.Horizontal);
if (!map.IsOutOfScreen(p))
{
map.Graphics.FillEllipse(brushLabel, p.X - 2, p.Y - 2, 4, 4);
map.DrawObjectCaption(fontLabel, brushLabel, Formatters.DateTime.Format(new Date(jd, map.GeoLocation.UtcOffset)), p, 4);
}
}
}
jd += trackStep;
}
}
/// <summary>
/// Draws nova name
/// </summary>
private void DrawStarName(IMapContext map, PointF point, Nova nova, float diam)
{
var fontStarNames = settings.Get <Font>("StarsLabelsFont");
// Star has proper name
if (map.ViewAngle < limitAllNames && settings.Get <bool>("StarsProperNames") && nova.ProperName != null)
{
map.DrawObjectCaption(fontStarNames, brushStarNames, nova.ProperName, point, diam);
return;
}
}
public override void Render(IMapContext map)
{
Graphics g = map.Graphics;
bool isGround = settings.Get <bool>("Ground");
bool isLabels = settings.Get <bool>("StarsLabels");
Brush brushNames = new SolidBrush(map.GetColor("ColorStarsLabels"));
if (map.MagLimit > 8 && settings.Get <bool>("Stars") && settings.Get <bool>("Tycho2"))
{
Brush brushStar = GetColor(map);
PrecessionalElements pe = Precession.ElementsFK5(map.JulianDay, Date.EPOCH_J2000);
var eq0 = map.Center.ToEquatorial(map.GeoLocation, map.SiderealTime);
CrdsEquatorial eq = Precession.GetEquatorialCoordinates(eq0, pe);
SkyContext context = new SkyContext(map.JulianDay, map.GeoLocation);
tycho2.LockedStar = map.LockedObject as Tycho2Star;
tycho2.SelectedStar = map.SelectedObject as Tycho2Star;
var stars = tycho2.GetStars(context, eq, map.ViewAngle, m => MagFilter(map, m));
foreach (var star in stars)
{
if (!isGround || star.Horizontal.Altitude > 0)
{
PointF p = map.Project(star.Horizontal);
if (!map.IsOutOfScreen(p))
{
float size = map.GetPointSize(star.Magnitude);
if (map.Schema == ColorSchema.White)
{
g.FillEllipse(Brushes.White, p.X - size / 2 - 1, p.Y - size / 2 - 1, size + 2, size + 2);
}
g.FillEllipse(brushStar, p.X - size / 2, p.Y - size / 2, size, size);
if (isLabels && map.ViewAngle < 1 && size > 3)
{
map.DrawObjectCaption(fontNames, brushNames, star.ToString(), p, size);
}
map.AddDrawnObject(star);
}
}
}
}
}
public override void Render(IMapContext map)
{
Graphics g = map.Graphics;
bool isGround = settings.Get <bool>("Ground");
bool showMeteors = settings.Get("Meteors");
bool onlyActive = settings.Get("MeteorsOnlyActive");
bool showLabels = settings.Get("MeteorsLabels");
int activityClassLimit = 4;
if (!showMeteors)
{
return;
}
var meteors = calc.GetCelestialObjects().Where(m => Angle.Separation(map.Center, m.Horizontal) < map.ViewAngle);
if (isGround)
{
meteors = meteors.Where(m => m.Horizontal.Altitude >= 0);
}
if (onlyActive)
{
meteors = meteors.Where(m => m.IsActive);
}
meteors = meteors.Where(m => m.ActivityClass <= activityClassLimit);
var color = map.GetColor("ColorMeteors");
var pen = new Pen(color);
var brush = new SolidBrush(color);
var font = settings.Get <Font>("MeteorsLabelsFont");
foreach (var meteor in meteors)
{
PointF p = map.Project(meteor.Horizontal);
if (!map.IsOutOfScreen(p))
{
g.DrawXCross(pen, p, 5);
map.AddDrawnObject(meteor);
if (showLabels)
{
map.DrawObjectCaption(font, brush, meteor.Name, p, 10);
}
}
}
}
private void RenderJupiterShadow(IMapContext map, JupiterMoon moon)
{
Planet jupiter = planetsCalc.Planets.ElementAt(Planet.JUPITER - 1);
float rotation = map.GetRotationTowardsNorth(jupiter.Equatorial) + 360 - (float)jupiter.Appearance.P;
float diam = map.GetDiskSize(jupiter.Semidiameter);
float diamEquat = diam;
float diamPolar = (1 - jupiter.Flattening) * diam;
// Jupiter radius, in pixels
float sd = diam / 2;
// Center of eclipsed moon
PointF pMoon = map.Project(moon.Horizontal);
// elipsed moon size, in pixels
float szB = map.GetDiskSize(moon.Semidiameter);
// Center of shadow
PointF p = new PointF(-(float)moon.RectangularS.X * sd, (float)moon.RectangularS.Y * sd);
map.Graphics.TranslateTransform(pMoon.X, pMoon.Y);
map.Graphics.RotateTransform(rotation);
var gpM = new GraphicsPath();
var gpU = new GraphicsPath();
gpU.AddEllipse(p.X - diamEquat / 2 - 1, p.Y - diamPolar / 2 - 1, diamEquat + 2, diamPolar + 2);
gpM.AddEllipse(-szB / 2 - 0.5f, -szB / 2 - 0.5f, szB + 1, szB + 1);
var regionU = new Region(gpU);
regionU.Intersect(gpM);
if (!regionU.IsEmpty(map.Graphics))
{
map.Graphics.FillRegion(new SolidBrush(clrJupiterShadow), regionU);
}
map.Graphics.ResetTransform();
if (!regionU.IsEmpty(map.Graphics))
{
map.DrawObjectCaption(fontShadowLabel, brushShadowLabel, Text.Get("EclipsedByJupiter"), pMoon, szB);
}
}
public override void Render(IMapContext map)
{
Graphics g = map.Graphics;
var allComets = cometsCalc.Comets;
bool isGround = settings.Get("Ground");
bool useTextures = settings.Get("PlanetsTextures");
bool drawComets = settings.Get("Comets");
bool drawLabels = settings.Get("CometsLabels");
bool drawAll = settings.Get <bool>("CometsDrawAll");
decimal drawAllMagLimit = settings.Get <decimal>("CometsDrawAllMagLimit");
bool drawLabelMag = settings.Get <bool>("CometsLabelsMag");
Brush brushNames = new SolidBrush(map.GetColor("ColorCometsLabels"));
var font = settings.Get <Font>("CometsLabelsFont");
if (drawComets)
{
var comets = allComets.Where(a => Angle.Separation(map.Center, a.Horizontal) < map.ViewAngle);
foreach (var c in comets)
{
float diam = map.GetDiskSize(c.Semidiameter);
float size = map.GetPointSize(c.Magnitude);
// if "draw all" setting is enabled, draw comets brighter than limit
if (drawAll && size < 1 && c.Magnitude <= (float)drawAllMagLimit)
{
size = 1;
}
string label = drawLabelMag ? $"{c.Name} {Formatters.Magnitude.Format(c.Magnitude)}" : c.Name;
if (diam > 5)
{
double ad = Angle.Separation(c.Horizontal, map.Center);
if ((!isGround || c.Horizontal.Altitude + c.Semidiameter / 3600 > 0) &&
ad < map.ViewAngle + c.Semidiameter / 3600)
{
PointF p = map.Project(c.Horizontal);
PointF t = map.Project(c.TailHorizontal);
double tail = map.DistanceBetweenPoints(p, t);
if (diam > 5 || tail > 10)
{
using (var gpComet = new GraphicsPath())
{
double rotation = Math.Atan2(t.Y - p.Y, t.X - p.X) + Math.PI / 2;
gpComet.StartFigure();
// tail is long enough
if (tail > diam)
{
gpComet.AddArc(p.X - diam / 2, p.Y - diam / 2, diam, diam, (float)Angle.ToDegrees(rotation), 180);
gpComet.AddLines(new PointF[] { gpComet.PathPoints[gpComet.PathPoints.Length - 1], t, gpComet.PathPoints[0] });
}
// draw coma only
else
{
gpComet.AddEllipse(p.X - diam / 2, p.Y - diam / 2, diam, diam);
}
gpComet.CloseAllFigures();
using (var brushComet = new PathGradientBrush(gpComet))
{
brushComet.CenterPoint = p;
int alpha = 100;
if (c.Magnitude >= map.MagLimit)
{
alpha -= (int)(100 * (c.Magnitude - map.MagLimit) / c.Magnitude);
}
brushComet.CenterColor = map.GetColor(Color.FromArgb(alpha, colorComet));
brushComet.SurroundColors = gpComet.PathPoints.Select(pp => Color.Transparent).ToArray();
g.FillPath(brushComet, gpComet);
}
}
if (drawLabels)
{
map.DrawObjectCaption(font, brushNames, label, p, diam);
}
map.AddDrawnObject(c);
}
}
}
else if ((int)size > 0)
{
PointF p = map.Project(c.Horizontal);
if (!map.IsOutOfScreen(p))
{
g.FillEllipse(new SolidBrush(map.GetColor(Color.White)), p.X - size / 2, p.Y - size / 2, size, size);
if (drawLabels)
{
map.DrawObjectCaption(font, brushNames, label, p, size);
}
map.AddDrawnObject(c);
continue;
}
}
}
}
}
private void RenderJupiterMoonShadow(IMapContext map, SizeableCelestialObject eclipsedBody, CrdsRectangular rect = null)
{
if (rect == null)
{
rect = new CrdsRectangular();
}
// collect moons than can produce a shadow
var ecliptingMoons = planetsCalc.JupiterMoons.Where(m => m.RectangularS.Z < rect.Z);
if (ecliptingMoons.Any())
{
Planet jupiter = planetsCalc.Planets.ElementAt(Planet.JUPITER - 1);
float rotation = map.GetRotationTowardsNorth(jupiter.Equatorial) + 360 - (float)jupiter.Appearance.P;
// Jupiter radius, in pixels
float sd = map.GetDiskSize(jupiter.Semidiameter) / 2;
// Center of eclipsed body
PointF pBody = map.Project(eclipsedBody.Horizontal);
// elipsed body size, in pixels
float szB = map.GetDiskSize(eclipsedBody.Semidiameter);
foreach (var moon in ecliptingMoons)
{
// umbra and penumbra radii, in acrseconds
var shadow = GalileanMoons.Shadow(jupiter.Ecliptical.Distance, jupiter.DistanceFromSun, moon.Number - 1, moon.RectangularS, rect);
// umbra and penumbra size, in pixels
float szU = map.GetDiskSize(shadow.Umbra);
float szP = map.GetDiskSize(shadow.Penumbra);
// coordinates of shadow relative to eclipsed body
CrdsRectangular shadowRelative = moon.RectangularS - rect;
// Center of shadow
PointF p = new PointF((float)shadowRelative.X * sd, -(float)shadowRelative.Y * sd);
map.Graphics.TranslateTransform(pBody.X, pBody.Y);
map.Graphics.RotateTransform(rotation);
// shadow has enough size to be rendered
if ((int)szP > 0)
{
var gpB = new GraphicsPath();
var gpP = new GraphicsPath();
var gpU = new GraphicsPath();
gpU.AddEllipse(p.X - szU / 2, p.Y - szU / 2, szU, szU);
gpP.AddEllipse(p.X - szP / 2, p.Y - szP / 2, szP, szP);
gpB.AddEllipse(-szB / 2 - 0.5f, -szB / 2 - 0.5f, szB + 1, szB + 1);
var regionP = new Region(gpP);
regionP.Intersect(gpB);
if (!regionP.IsEmpty(map.Graphics))
{
float f1 = 1 - (szU + szP) / 2 / szP;
float f2 = 1 - szU / szP;
var brushP = new PathGradientBrush(gpP);
brushP.CenterPoint = p;
brushP.CenterColor = clrJupiterMoonShadowLight;
brushP.InterpolationColors = new ColorBlend()
{
Colors = new[]
{
Color.Transparent,
clrJupiterMoonShadowDark,
clrJupiterMoonShadowLight,
clrJupiterMoonShadowLight
},
Positions = new float[] { 0, f1, f2, 1 }
};
var regionU = new Region(gpU);
regionU.Intersect(gpB);
var brushU = new SolidBrush(clrJupiterMoonShadowLight);
map.Graphics.FillRegion(brushP, regionP);
map.Graphics.FillRegion(brushU, regionU);
// outline circles
if (settings.Get <bool>("JupiterMoonsShadowOutline") && szP > 20)
{
map.Graphics.DrawEllipse(penShadowOutline, p.X - (szP + szU) / 4, p.Y - (szP + szU) / 4, (szP + szU) / 2, (szP + szU) / 2);
map.Graphics.DrawEllipse(penShadowOutline, p.X - szU / 2, p.Y - szU / 2, szU, szU);
PointF[] points = new PointF[] { new PointF(p.X, p.Y) };
map.Graphics.TransformPoints(CoordinateSpace.Page, CoordinateSpace.World, points);
map.Graphics.ResetTransform();
map.DrawObjectCaption(fontShadowLabel, brushShadowLabel, moon.ShadowName, points[0], szP);
}
}
}
map.Graphics.ResetTransform();
}
}
}
private void RenderJupiterMoons(IMapContext map, Planet jupiter, IEnumerable <JupiterMoon> moons)
{
bool isGround = settings.Get <bool>("Ground");
bool useTextures = settings.Get <bool>("UseTextures");
double coeff = map.DiagonalCoefficient();
foreach (var moon in moons)
{
double ad = Angle.Separation(moon.Horizontal, map.Center);
if ((!isGround || moon.Horizontal.Altitude + moon.Semidiameter / 3600 > 0) &&
ad < coeff * map.ViewAngle + moon.Semidiameter / 3600)
{
PointF p = map.Project(moon.Horizontal);
PointF pJupiter = map.Project(jupiter.Horizontal);
float size = map.GetPointSize(moon.Magnitude, 2);
float diam = map.GetDiskSize(moon.Semidiameter);
// diameter is to small to render moon disk,
// but point size caclulated from magnitude is enough to be drawn
if (size > diam && (int)size > 0)
{
// do not draw moon point if eclipsed
if (!moon.IsEclipsedByJupiter)
{
// satellite is distant enough from the Jupiter
// but too small to be drawn as disk
if (map.DistanceBetweenPoints(p, pJupiter) >= 5)
{
map.Graphics.TranslateTransform(p.X, p.Y);
map.Graphics.FillEllipse(new SolidBrush(map.GetColor(Color.Wheat)), -size / 2, -size / 2, size, size);
map.Graphics.ResetTransform();
map.DrawObjectCaption(fontLabel, brushLabel, moon.Name, p, 2);
map.AddDrawnObject(moon);
}
}
}
// moon should be rendered as disk
else if (diam >= size && (int)diam > 0)
{
float rotation = map.GetRotationTowardsNorth(jupiter.Equatorial) + 360 - (float)jupiter.Appearance.P;
map.Graphics.TranslateTransform(p.X, p.Y);
map.Graphics.RotateTransform(rotation);
if (useTextures)
{
Image texture = imagesCache.RequestImage($"5-{moon.Number}", new PlanetTextureToken($"5-{moon.Number}", moon.CM, jupiter.Appearance.D), PlanetTextureProvider, map.Redraw);
if (texture != null)
{
map.DrawImage(texture, -diam / 2 * 1.01f, -diam / 2 * 1.01f, diam * 1.01f, diam * 1.01f);
DrawVolume(map, diam, 0);
}
else
{
map.Graphics.FillEllipse(new SolidBrush(map.GetColor(Color.Wheat)), -diam / 2, -diam / 2, diam, diam);
}
}
else
{
map.Graphics.FillEllipse(new SolidBrush(map.GetColor(Color.Wheat)), -diam / 2, -diam / 2, diam, diam);
if (diam > 2)
{
map.Graphics.DrawEllipse(new Pen(map.GetSkyColor()), -diam / 2, -diam / 2, diam, diam);
}
}
map.Graphics.ResetTransform();
// render another moon shadows on the moon
RenderJupiterMoonShadow(map, moon, moon.RectangularS);
// render Jupiter shadow on the moon
if (moon.IsEclipsedByJupiter)
{
RenderJupiterShadow(map, moon);
}
map.DrawObjectCaption(fontLabel, brushLabel, moon.Name, p, diam);
map.AddDrawnObject(moon);
}
}
}
}
private void RenderPlanet(IMapContext map, Planet planet)
{
if (!settings.Get <bool>("Planets"))
{
return;
}
if (planet.Number == Planet.JUPITER)
{
// render moons behind Jupiter
var moons = planetsCalc.JupiterMoons.Where(m => m.Rectangular.Z >= 0).OrderByDescending(m => m.Rectangular.Z);
RenderJupiterMoons(map, planet, moons);
}
Graphics g = map.Graphics;
double ad = Angle.Separation(planet.Horizontal, map.Center);
bool isGround = settings.Get <bool>("Ground");
bool useTextures = settings.Get <bool>("UseTextures");
double coeff = map.DiagonalCoefficient();
if ((!isGround || planet.Horizontal.Altitude + planet.Semidiameter / 3600 > 0) &&
ad < coeff * map.ViewAngle + planet.Semidiameter / 3600)
{
float size = map.GetPointSize(planet.Magnitude, maxDrawingSize: 7);
float diam = map.GetDiskSize(planet.Semidiameter);
// diameter is to small to render as planet disk,
// but point size caclulated from magnitude is enough to be drawn
if (size > diam && (int)size > 0)
{
PointF p = map.Project(planet.Horizontal);
g.FillEllipse(GetPlanetColor(map, planet.Number), p.X - size / 2, p.Y - size / 2, size, size);
map.DrawObjectCaption(fontLabel, brushLabel, planet.Name, p, size);
map.AddDrawnObject(planet);
}
// planet should be rendered as disk
else if (diam >= size && (int)diam > 0)
{
PointF p = map.Project(planet.Horizontal);
float rotation = map.GetRotationTowardsNorth(planet.Equatorial) + 360 - (float)planet.Appearance.P;
g.TranslateTransform(p.X, p.Y);
g.RotateTransform(rotation);
DrawRotationAxis(g, diam);
if (planet.Number == Planet.SATURN)
{
var rings = planetsCalc.SaturnRings;
double maxSize = Math.Max(map.Width, map.Height);
// scale value to convert visible size of ring to screen pixels
double scale = 1.0 / 3600 / map.ViewAngle * maxSize / 4;
// draw rings by halfs arcs, first half is farther one
for (int half = 0; half < 2; half++)
{
// draw planets textures
if (useTextures)
{
float a = (float)(rings.GetRingSize(0, RingEdge.Outer, RingAxis.Major) * scale);
float b = (float)(rings.GetRingSize(0, RingEdge.Outer, RingAxis.Minor) * scale);
// half of source image: 0 = top, 1 = bottom
int h = (half + (rings.B > 0 ? 0 : 1)) % 2;
Image textureRings = imagesCache.RequestImage("Rings", true, t => Image.FromFile("Data\\Rings.png", true), map.Redraw);
if (textureRings != null)
{
map.DrawImage(textureRings,
// destination rectangle
new RectangleF(-a, -b + h * b, a * 2, b),
// source rectangle
new RectangleF(0, h * textureRings.Height / 2f, textureRings.Width, textureRings.Height / 2f));
}
else
{
DrawRingsUntextured(g, rings, half, scale);
}
}
// do not use textures
else
{
DrawRingsUntextured(g, rings, half, scale);
}
// draw planet disk after first half of rings
if (half == 0)
{
DrawPlanetGlobe(map, planet, diam);
}
}
}
else
{
DrawPlanetGlobe(map, planet, diam);
}
g.ResetTransform();
if (planet.Number <= Planet.MARS)
{
float phase = (float)planet.Phase * Math.Sign(planet.Elongation);
GraphicsPath shadow = GetPhaseShadow(phase, diam + 1, planet.Flattening);
// rotation of phase image
rotation = map.GetRotationTowardsEclipticPole(planet.Ecliptical);
g.TranslateTransform(p.X, p.Y);
g.RotateTransform(rotation);
g.FillPath(GetShadowBrush(map), shadow);
g.ResetTransform();
}
map.DrawObjectCaption(fontLabel, brushLabel, planet.Name, p, diam);
map.AddDrawnObject(planet);
if (planet.Number == Planet.JUPITER)
{
// render shadows on Jupiter
RenderJupiterMoonShadow(map, planet);
}
}
}
// render moons over Jupiter
if (planet.Number == Planet.JUPITER)
{
var moons = planetsCalc.JupiterMoons.Where(m => m.Rectangular.Z < 0).OrderByDescending(m => m.Rectangular.Z);
RenderJupiterMoons(map, planet, moons);
}
}
private void RenderMoon(IMapContext map)
{
if (!settings.Get <bool>("Moon"))
{
return;
}
bool isGround = settings.Get <bool>("Ground");
bool useTextures = settings.Get <bool>("MoonTexture");
double ad = Angle.Separation(moon.Horizontal, map.Center);
double coeff = map.DiagonalCoefficient();
if ((!isGround || moon.Horizontal.Altitude + moon.Semidiameter / 3600 > 0) &&
ad < coeff * map.ViewAngle + moon.Semidiameter / 3600.0)
{
PointF p = map.Project(moon.Horizontal);
double inc = map.GetRotationTowardsNorth(moon.Equatorial);
// final rotation of drawn image
// axis rotation is negated because measured counter-clockwise
float axisRotation = (float)(inc - moon.PAaxis);
map.Graphics.TranslateTransform(p.X, p.Y);
map.Graphics.RotateTransform(axisRotation);
// drawing size
float size = map.GetDiskSize(moon.Semidiameter, 10);
SolidBrush brushMoon = new SolidBrush(map.GetColor(Color.Gray));
if (useTextures && size > 10)
{
Image textureMoon = imagesCache.RequestImage("Moon", new PlanetTextureToken("Moon", moon.Libration.l, moon.Libration.b), MoonTextureProvider, map.Redraw);
if (textureMoon != null)
{
map.Graphics.FillEllipse(brushMoon, -size / 2, -size / 2, size, size);
map.DrawImage(textureMoon, -size / 2, -size / 2, size, size);
}
else
{
map.Graphics.FillEllipse(brushMoon, -size / 2, -size / 2, size, size);
}
}
else
{
// Moon disk
map.Graphics.FillEllipse(brushMoon, -size / 2, -size / 2, size, size);
}
map.Graphics.ResetTransform();
float phase = (float)moon.Phase * Math.Sign(moon.Elongation);
float rotation = map.GetRotationTowardsEclipticPole(moon.Ecliptical0);
GraphicsPath shadow = GetPhaseShadow(phase, size + 1);
// shadowed part of disk
map.Graphics.TranslateTransform(p.X, p.Y);
map.Graphics.RotateTransform(rotation);
map.Graphics.FillPath(GetShadowBrush(map), shadow);
map.Graphics.ResetTransform();
if (settings.Get <bool>("MoonLabel"))
{
map.DrawObjectCaption(fontLabel, brushLabel, moon.Name, p, size);
}
map.AddDrawnObject(moon);
}
}
private void RenderSun(IMapContext map)
{
if (!settings.Get <bool>("Sun"))
{
return;
}
bool isGround = settings.Get <bool>("Ground");
bool useTextures = settings.Get <bool>("SunTexture");
double ad = Angle.Separation(sun.Horizontal, map.Center);
double coeff = map.DiagonalCoefficient();
Color colorSun = map.GetColor(clrSunNight, clrSunDaylight);
if ((!isGround || sun.Horizontal.Altitude + sun.Semidiameter / 3600 > 0) &&
ad < coeff * map.ViewAngle + sun.Semidiameter / 3600)
{
PointF p = map.Project(sun.Horizontal);
float inc = map.GetRotationTowardsNorth(sun.Equatorial);
map.Graphics.TranslateTransform(p.X, p.Y);
map.Graphics.RotateTransform(inc);
float size = map.GetDiskSize(sun.Semidiameter, 10);
if (map.Schema == ColorSchema.Night && useTextures && size > 10)
{
Date date = new Date(map.JulianDay);
DateTime dt = new DateTime(date.Year, date.Month, (int)date.Day, 0, 0, 0, DateTimeKind.Utc);
Brush brushSun = new SolidBrush(clrSunNight);
Image imageSun = imagesCache.RequestImage("Sun", dt, SunImageProvider, map.Redraw);
map.Graphics.FillEllipse(brushSun, -size / 2, -size / 2, size, size);
if (imageSun != null)
{
map.Graphics.DrawImage(imageSun, -size / 2, -size / 2, size, size);
}
}
else
{
if (map.Schema == ColorSchema.White)
{
map.Graphics.FillEllipse(Brushes.White, -size / 2, -size / 2, size, size);
map.Graphics.DrawEllipse(Pens.Black, -size / 2, -size / 2, size, size);
}
else
{
Brush brushSun = new SolidBrush(colorSun);
map.Graphics.FillEllipse(brushSun, -size / 2, -size / 2, size, size);
}
}
map.Graphics.ResetTransform();
if (settings.Get <bool>("SunLabel"))
{
map.DrawObjectCaption(fontLabel, brushLabel, sun.Name, p, size);
}
map.AddDrawnObject(sun);
}
}
public override void Render(IMapContext map)
{
Graphics g = map.Graphics;
var allAsteroids = asteroidsCalc.Asteroids;
bool isGround = settings.Get <bool>("Ground");
double coeff = map.DiagonalCoefficient();
bool drawAsteroids = settings.Get <bool>("Asteroids");
bool drawLabels = settings.Get <bool>("AsteroidsLabels");
Brush brushNames = new SolidBrush(map.GetColor("ColorAsteroidsLabels"));
if (drawAsteroids)
{
var asteroids = allAsteroids.Where(a => Angle.Separation(map.Center, a.Horizontal) < map.ViewAngle * coeff);
foreach (var a in asteroids)
{
double ad = Angle.Separation(a.Horizontal, map.Center);
if ((!isGround || a.Horizontal.Altitude + a.Semidiameter / 3600 > 0) &&
ad < coeff * map.ViewAngle + a.Semidiameter / 3600)
{
float diam = map.GetDiskSize(a.Semidiameter);
// asteroid should be rendered as disk
if ((int)diam > 0)
{
PointF p = map.Project(a.Horizontal);
map.Graphics.FillEllipse(new SolidBrush(map.GetColor(colorAsteroid)), p.X - diam / 2, p.Y - diam / 2, diam, diam);
DrawVolume(map, diam, 0);
if (drawLabels)
{
map.DrawObjectCaption(fontNames, brushNames, a.Name, p, diam);
}
map.AddDrawnObject(a);
continue;
}
// asteroid should be rendered as point
float size = map.GetPointSize(a.Magnitude, maxDrawingSize: 3);
if ((int)size > 0)
{
PointF p = map.Project(a.Horizontal);
if (!map.IsOutOfScreen(p))
{
g.FillEllipse(new SolidBrush(map.GetColor(Color.White)), p.X - size / 2, p.Y - size / 2, size, size);
if (drawLabels)
{
map.DrawObjectCaption(fontNames, brushNames, a.Name, p, size);
}
map.AddDrawnObject(a);
continue;
}
}
}
}
}
}
public override void Render(IMapContext map)
{
Graphics g = map.Graphics;
var allAsteroids = asteroidsCalc.Asteroids;
bool isGround = settings.Get <bool>("Ground");
bool drawAsteroids = settings.Get <bool>("Asteroids");
bool drawLabels = settings.Get <bool>("AsteroidsLabels");
bool drawAll = settings.Get <bool>("AsteroidsDrawAll");
decimal drawAllMagLimit = settings.Get <decimal>("AsteroidsDrawAllMagLimit");
bool drawLabelMag = settings.Get <bool>("AsteroidsLabelsMag");
Brush brushNames = new SolidBrush(map.GetColor("ColorAsteroidsLabels"));
var font = settings.Get <Font>("AsteroidsLabelsFont");
if (drawAsteroids)
{
var asteroids = allAsteroids.Where(a => Angle.Separation(map.Center, a.Horizontal) < map.ViewAngle);
foreach (var a in asteroids)
{
double ad = Angle.Separation(a.Horizontal, map.Center);
if ((!isGround || a.Horizontal.Altitude + a.Semidiameter / 3600 > 0) &&
ad < map.ViewAngle + a.Semidiameter / 3600)
{
float diam = map.GetDiskSize(a.Semidiameter);
float size = map.GetPointSize(a.Magnitude);
// if "draw all" setting is enabled, draw asteroids brighter than limit
if (drawAll && size < 1 && a.Magnitude <= (float)drawAllMagLimit)
{
size = 1;
}
string label = drawLabelMag ? $"{a.Name} {Formatters.Magnitude.Format(a.Magnitude)}" : a.Name;
// asteroid should be rendered as disk
if ((int)diam > 0 && diam > size)
{
PointF p = map.Project(a.Horizontal);
map.Graphics.FillEllipse(new SolidBrush(map.GetColor(colorAsteroid)), p.X - diam / 2, p.Y - diam / 2, diam, diam);
DrawVolume(map, diam, 0);
if (drawLabels)
{
map.DrawObjectCaption(font, brushNames, label, p, diam);
}
map.AddDrawnObject(a);
continue;
}
// asteroid should be rendered as point
else if ((int)size > 0)
{
PointF p = map.Project(a.Horizontal);
if (!map.IsOutOfScreen(p))
{
g.FillEllipse(new SolidBrush(map.GetColor(Color.White)), p.X - size / 2, p.Y - size / 2, size, size);
if (drawLabels)
{
map.DrawObjectCaption(font, brushNames, label, p, size);
}
map.AddDrawnObject(a);
continue;
}
}
}
}
}
}
public virtual void Draw(IMapContext map, ISettings settings, DeepSky ds)
{
PointF p = map.Project(ds.Horizontal);
float sizeA = GetDiameter(map, ds.SizeA);
float sizeB = GetDiameter(map, ds.SizeB);
// elliptic object with known size
if (sizeB > 0 && sizeB != sizeA)
{
float diamA = GetDiameter(map, ds.SizeA);
if (diamA > 10)
{
float diamB = GetDiameter(map, ds.SizeB);
if (ds.Outline != null && settings.Get <bool>("DeepSkyOutlines"))
{
DrawOutline(map, ds.Outline);
}
else
{
float rotation = map.GetRotationTowardsNorth(ds.Equatorial) + 90 - ds.PA;
map.Graphics.TranslateTransform(p.X, p.Y);
map.Graphics.RotateTransform(rotation);
DrawEllipticObject(map.Graphics, diamA, diamB);
map.Graphics.ResetTransform();
}
map.AddDrawnObject(ds);
if (map.ViewAngle <= Renderer.limitLabels && settings.Get <bool>("DeepSkyLabels"))
{
var font = settings.Get <Font>("DeepSkyLabelsFont");
map.DrawObjectCaption(font, Renderer.brushCaption, ds.DisplayName, p, Math.Min(diamA, diamB));
}
}
}
// round object
else if (sizeA > 0)
{
float diamA = GetDiameter(map, ds.SizeA);
if (diamA > 10)
{
if (ds.Outline != null && settings.Get <bool>("DeepSkyOutlines"))
{
DrawOutline(map, ds.Outline);
}
else
{
float rotation = map.GetRotationTowardsNorth(ds.Equatorial) + 90 - ds.PA;
map.Graphics.TranslateTransform(p.X, p.Y);
map.Graphics.RotateTransform(rotation);
DrawRoundObject(map.Graphics, diamA);
map.Graphics.ResetTransform();
}
map.AddDrawnObject(ds);
if (map.ViewAngle <= Renderer.limitLabels && settings.Get <bool>("DeepSkyLabels"))
{
var font = settings.Get <Font>("DeepSkyLabelsFont");
map.DrawObjectCaption(font, Renderer.brushCaption, ds.DisplayName, p, diamA);
}
}
}
// point object
else
{
float size = map.GetPointSize(ds.Mag == null ? 15 : ds.Mag.Value);
if ((int)size > 0)
{
if (ds.Outline != null && settings.Get <bool>("DeepSkyOutlines"))
{
DrawOutline(map, ds.Outline);
}
else
{
map.Graphics.TranslateTransform(p.X, p.Y);
DrawPointObject(map.Graphics, size);
map.Graphics.ResetTransform();
}
map.AddDrawnObject(ds);
if (map.ViewAngle <= Renderer.limitLabels && settings.Get <bool>("DeepSkyLabels"))
{
var font = settings.Get <Font>("DeepSkyLabelsFont");
map.DrawObjectCaption(font, Renderer.brushCaption, ds.DisplayName, p, 0);
}
}
}
}
public override void Render(IMapContext map)
{
Graphics g = map.Graphics;
var allComets = cometsCalc.Comets;
bool isGround = settings.Get("Ground");
bool useTextures = settings.Get("PlanetsTextures");
bool drawComets = settings.Get("Comets");
bool drawLabels = settings.Get("AsteroidsLabels");
Brush brushNames = new SolidBrush(map.GetColor("ColorCometsLabels"));
if (drawComets)
{
var comets = allComets.Where(a => Angle.Separation(map.Center, a.Horizontal) < map.ViewAngle);
foreach (var c in comets)
{
float diam = map.GetDiskSize(c.Semidiameter);
if (diam > 5)
{
double ad = Angle.Separation(c.Horizontal, map.Center);
if ((!isGround || c.Horizontal.Altitude + c.Semidiameter / 3600 > 0) &&
ad < map.ViewAngle + c.Semidiameter / 3600)
{
PointF p = map.Project(c.Horizontal);
PointF t = map.Project(c.TailHorizontal);
double tail = map.DistanceBetweenPoints(p, t);
if (diam > 5 || tail > 10)
{
using (var gpComet = new GraphicsPath())
{
double rotation = Math.Atan2(t.Y - p.Y, t.X - p.X) + Math.PI / 2;
gpComet.StartFigure();
// tail is long enough
if (tail > diam)
{
gpComet.AddArc(p.X - diam / 2, p.Y - diam / 2, diam, diam, (float)Angle.ToDegrees(rotation), 180);
gpComet.AddLines(new PointF[] { gpComet.PathPoints[gpComet.PathPoints.Length - 1], t, gpComet.PathPoints[0] });
}
// draw coma only
else
{
gpComet.AddEllipse(p.X - diam / 2, p.Y - diam / 2, diam, diam);
}
gpComet.CloseAllFigures();
using (var brushComet = new PathGradientBrush(gpComet))
{
brushComet.CenterPoint = p;
int alpha = 100;
if (c.Magnitude >= map.MagLimit)
{
alpha -= (int)(100 * (c.Magnitude - map.MagLimit) / c.Magnitude);
}
brushComet.CenterColor = map.GetColor(Color.FromArgb(alpha, colorComet));
brushComet.SurroundColors = gpComet.PathPoints.Select(pp => Color.Transparent).ToArray();
g.FillPath(brushComet, gpComet);
}
}
if (drawLabels)
{
var font = settings.Get <Font>("CometsLabelsFont");
map.DrawObjectCaption(font, brushNames, c.Name, p, diam);
}
map.AddDrawnObject(c);
}
}
}
}
}
}
private void RenderEarthShadow(IMapContext map)
{
// here and below suffixes meanings are: "M" = Moon, "P" = penumbra, "U" = umbra
// angular distance from center of map to earth shadow center
double ad = Angle.Separation(moon.EarthShadowCoordinates, map.Center);
// semidiameter of penumbra in seconds of arc
double sdP = moon.EarthShadow.PenumbraRadius * 6378.0 / 1738.0 * moon.Semidiameter;
bool isGround = settings.Get <bool>("Ground");
double coeff = map.DiagonalCoefficient();
if ((!isGround || moon.EarthShadowCoordinates.Altitude + sdP / 3600 > 0) &&
ad < coeff * map.ViewAngle + sdP / 3600)
{
PointF p = map.Project(moon.EarthShadowCoordinates);
PointF pMoon = map.Project(moon.Horizontal);
// size of penumbra, in pixels
float szP = map.GetDiskSize(sdP);
// size of umbra, in pixels
float szU = szP / (float)moon.EarthShadow.Ratio;
// size of Moon, in pixels
float szM = map.GetDiskSize(moon.Semidiameter);
// fraction of the penumbra ring (without umbra part)
float fr = 1 - szU / szP;
// do not render on large view angle
if (szM >= 10)
{
// if eclipse takes place
if (Angle.Separation(moon.Horizontal, moon.EarthShadowCoordinates) <= sdP / 3600)
{
var gpM = new GraphicsPath();
var gpP = new GraphicsPath();
var gpU = new GraphicsPath();
gpP.AddEllipse(p.X - szP / 2, p.Y - szP / 2, szP, szP);
gpU.AddEllipse(p.X - szU / 2, p.Y - szU / 2, szU, szU);
gpM.AddEllipse(pMoon.X - szM / 2 - 0.5f, pMoon.Y - szM / 2 - 0.5f, szM + 1, szM + 1);
var brushP = new PathGradientBrush(gpP);
brushP.CenterPoint = p;
brushP.CenterColor = clrPenumbraGrayDark;
brushP.SurroundColors = new Color[] { clrPenumbraTransp };
var blendP = new ColorBlend();
blendP.Colors = new Color[] { clrPenumbraTransp, clrPenumbraTransp, clrPenumbraGrayLight, clrPenumbraGrayDark, clrPenumbraGrayDark };
blendP.Positions = new float[] { 0, fr / 2, fr * 0.95f, fr, 1 };
brushP.InterpolationColors = blendP;
var brushU = new PathGradientBrush(gpU);
brushU.CenterColor = clrUmbraRed;
brushU.SurroundColors = new Color[] { clrUmbraGray };
brushU.Blend.Factors = new float[] { 0, 0.8f, 1 };
brushU.Blend.Positions = new float[] { 0, 0.8f, 1 };
var regionP = new Region(gpP);
var regionU = new Region(gpU);
regionP.Exclude(regionU);
regionP.Intersect(gpM);
regionU.Intersect(gpM);
map.Graphics.FillRegion(brushP, regionP);
map.Graphics.FillRegion(brushU, regionU);
}
// outline circles
if (settings.Get <bool>("EarthShadowOutline") && map.ViewAngle > 0.5)
{
var brush = new SolidBrush(map.GetColor(clrShadowOutline));
var pen = new Pen(brush)
{
DashStyle = DashStyle.Dot
};
map.Graphics.TranslateTransform(p.X, p.Y);
map.Graphics.DrawEllipse(pen, -szP / 2, -szP / 2, szP, szP);
map.Graphics.DrawEllipse(pen, -szU / 2, -szU / 2, szU, szU);
map.Graphics.ResetTransform();
if (map.ViewAngle <= 10)
{
map.DrawObjectCaption(fontShadowLabel, brush, Text.Get("EarthShadow.Label"), p, szP);
}
}
}
}
}
