Sorry, forget to attach it.
On Tue, May 27, 2014 at 11:24 AM, Marco Diego Aurélio Mesquita
<[email protected]> wrote:
> Hi devs,
>
> I'm an amateur astronomer and aspiring Stellarium developer. As such,
> I really miss the possibility to know the surface brightness of an
> object from Stellarium.
>
> Surface brightness is a very good metric to know how easily visible an
> object is. As of now, Stellarium does not display such info.
>
> The attached patch implements the display of surface brightness for
> extended objects. Its math pretty straightforward and comes from [1].
> It was created from Stellarium 0.12.4 source code.
>
> Please review it.
>
> [1] http://en.wikipedia.org/wiki/Surface_brightness
Somente em stellarium-0.12.4/: builds
diff -ur stellarium-clean/stellarium-0.12.4/data/default_config.ini
stellarium-0.12.4/data/default_config.ini
--- stellarium-clean/stellarium-0.12.4/data/default_config.ini 2013-09-07
12:50:48.000000000 -0300
+++ stellarium-0.12.4/data/default_config.ini 2014-05-27 09:17:02.695589862
-0300
@@ -100,6 +100,7 @@
flag_show_radecj2000 = false
flag_show_radecofdate = false
flag_show_size = false
+flag_show_surfacebrightness = true
[gui]
flag_show_flip_buttons = false
Somente em stellarium-0.12.4/data: default_config.ini~
diff -ur stellarium-clean/stellarium-0.12.4/src/core/modules/Nebula.cpp
stellarium-0.12.4/src/core/modules/Nebula.cpp
--- stellarium-clean/stellarium-0.12.4/src/core/modules/Nebula.cpp
2013-08-04 03:20:27.000000000 -0300
+++ stellarium-0.12.4/src/core/modules/Nebula.cpp 2014-05-27
09:25:41.719602933 -0300
@@ -123,6 +123,9 @@
if (flags&Extra1)
oss << q_("Type: <b>%1</b>").arg(getTypeString()) << "<br>";
+ bool isExtended = angularSize > 0;
+ double angularSizeInDegrees = angularSize*M_PI/180.;
+
if (mag < 50 && flags&Magnitude)
{
if (core->getSkyDrawer()->getFlagHasAtmosphere())
@@ -130,11 +133,24 @@
QString::number(getVMagnitude(core, true), 'f', 2)) << "<br>";
else
oss << q_("Magnitude: <b>%1</b>").arg(getVMagnitude(core,
false), 0, 'f', 2) << "<br>";
+
+ if (isExtended && flags&SurfaceBrightness) {
+ double angularSizeInArcsec = 3600.0 * angularSizeInDegrees;
+ double surfaceArea = M_PI*angularSizeInArcsec*angularSizeInArcsec;
+ double surfaceBrightness = getVMagnitude(core, false) +
2.5*log(surfaceArea);
+ double extinctSurfaceBrightness = getVMagnitude(core, true) +
2.5*log(surfaceArea);
+ if (core->getSkyDrawer()->getFlagHasAtmosphere())
+ oss << q_("Surface Brightness: <b>%1</b> (extincted to:
<b>%2</b>)").arg(QString::number(surfaceBrightness, 'f', 2),
+
QString::number(extinctSurfaceBrightness, 'f', 2)) << "<br>";
+ else
+ oss << q_("Surface Brightness:
<b>%1</b>").arg(surfaceBrightness, 0, 'f', 2) << "<br>";
+ }
+
}
oss << getPositionInfoString(core, flags);
- if (angularSize>0 && flags&Size)
- oss << q_("Size:
%1").arg(StelUtils::radToDmsStr(angularSize*M_PI/180.)) << "<br>";
+ if (isExtended && flags&Size)
+ oss << q_("Size:
%1").arg(StelUtils::radToDmsStr(angularSizeInDegrees)) << "<br>";
postProcessInfoString(str, flags);
Somente em stellarium-0.12.4/src/core/modules: Nebula.cpp~
diff -ur stellarium-clean/stellarium-0.12.4/src/core/StelObject.hpp
stellarium-0.12.4/src/core/StelObject.hpp
--- stellarium-clean/stellarium-0.12.4/src/core/StelObject.hpp 2013-04-21
04:23:20.000000000 -0300
+++ stellarium-0.12.4/src/core/StelObject.hpp 2014-05-27 08:46:50.023544213
-0300
@@ -56,7 +56,8 @@
PlainText = 0x00000800, //!< Strip HTML tags from output
HourAngle = 0x00001000, //!< The hour angle + DE (of date)
AbsoluteMagnitude = 0x00002000, //!< The absolute magnitude
- GalCoordJ2000 = 0x00004000 //!< The galactic position
(J2000 ref) GZ: HEY STOP! GalCoords are DEFINED in B1950 coordinates! What we
have here is a transformation matrix preconfigured to do precession
J2000->B1950 and Equ.B1950->Gal. But "GalCoord for J2000" does not make sense.
+ GalCoordJ2000 = 0x00004000, //!< The galactic position
(J2000 ref) GZ: HEY STOP! GalCoords are DEFINED in B1950 coordinates! What we
have here is a transformation matrix preconfigured to do precession
J2000->B1950 and Equ.B1950->Gal. But "GalCoord for J2000" does not make sense.
+ SurfaceBrightness = 0x00008000 //!< Surface brightness of the object
};
typedef QFlags<InfoStringGroupFlags> InfoStringGroup;
Q_FLAGS(InfoStringGroup)
Somente em stellarium-0.12.4/src/core: StelObject.hpp~
diff -ur stellarium-clean/stellarium-0.12.4/src/gui/ConfigurationDialog.cpp
stellarium-0.12.4/src/gui/ConfigurationDialog.cpp
--- stellarium-clean/stellarium-0.12.4/src/gui/ConfigurationDialog.cpp
2013-09-13 07:51:45.000000000 -0300
+++ stellarium-0.12.4/src/gui/ConfigurationDialog.cpp 2014-05-27
09:54:47.115646888 -0300
@@ -396,6 +396,8 @@
flags |= StelObject::CatalogNumber;
if (ui->checkBoxVisualMag->isChecked())
flags |= StelObject::Magnitude;
+ if (ui->checkBoxSurfaceBrightness->isChecked())
+ flags |= StelObject::SurfaceBrightness;
if (ui->checkBoxAbsoluteMag->isChecked())
flags |= StelObject::AbsoluteMagnitude;
if (ui->checkBoxRaDecJ2000->isChecked())
@@ -583,6 +585,8 @@
(bool) (flags & StelObject::CatalogNumber));
conf->setValue("flag_show_magnitude",
(bool) (flags & StelObject::Magnitude));
+ conf->setValue("flag_show_surfacebrightness",
+ (bool) (flags & StelObject::SurfaceBrightness));
conf->setValue("flag_show_absolutemagnitude",
(bool) (flags & StelObject::AbsoluteMagnitude));
conf->setValue("flag_show_radecj2000",
@@ -1075,6 +1079,7 @@
ui->checkBoxName->setChecked(flags & StelObject::Name);
ui->checkBoxCatalogNumbers->setChecked(flags &
StelObject::CatalogNumber);
ui->checkBoxVisualMag->setChecked(flags & StelObject::Magnitude);
+ ui->checkBoxSurfaceBrightness->setChecked(flags &
StelObject::SurfaceBrightness);
ui->checkBoxAbsoluteMag->setChecked(flags &
StelObject::AbsoluteMagnitude);
ui->checkBoxRaDecJ2000->setChecked(flags & StelObject::RaDecJ2000);
ui->checkBoxRaDecOfDate->setChecked(flags & StelObject::RaDecOfDate);
Somente em stellarium-0.12.4/src/gui: ConfigurationDialog.cpp~
diff -ur stellarium-clean/stellarium-0.12.4/src/gui/configurationDialog.ui
stellarium-0.12.4/src/gui/configurationDialog.ui
--- stellarium-clean/stellarium-0.12.4/src/gui/configurationDialog.ui
2013-08-04 03:20:27.000000000 -0300
+++ stellarium-0.12.4/src/gui/configurationDialog.ui 2014-05-27
09:47:35.195636011 -0300
@@ -405,6 +405,16 @@
</attribute>
</widget>
</item>
+ <item row="0" column="2">
+ <widget class="QCheckBox" name="checkBoxSurfaceBrightness">
+ <property name="text">
+ <string>Surface brightness</string>
+ </property>
+ <attribute name="buttonGroup">
+ <string notr="true">buttonGroupDisplayedFields</string>
+ </attribute>
+ </widget>
+ </item>
<item row="1" column="1">
<widget class="QCheckBox" name="checkBoxAbsoluteMag">
<property name="text">
Somente em stellarium-0.12.4/src/gui: configurationDialog.ui~
diff -ur stellarium-clean/stellarium-0.12.4/src/gui/SkyGui.cpp
stellarium-0.12.4/src/gui/SkyGui.cpp
--- stellarium-clean/stellarium-0.12.4/src/gui/SkyGui.cpp 2013-08-04
03:20:27.000000000 -0300
+++ stellarium-0.12.4/src/gui/SkyGui.cpp 2014-05-27 09:16:15.523588674
-0300
@@ -82,6 +82,8 @@
infoTextFilters |= StelObject::Extra2;
if (conf->value("flag_show_extra3", false).toBool())
infoTextFilters |= StelObject::Extra3;
+ if (conf->value("flag_show_surfacebrightness", false).toBool())
+ infoTextFilters |= StelObject::SurfaceBrightness;
conf->endGroup();
}
else
Somente em stellarium-0.12.4/src/gui: SkyGui.cpp~
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