The Solar System Animation App

One of the apps shows an animation of the sunangles on a globe and a flatearth, based on a set of parameters and functions.
Another one shows an explanation of how all this was calculated, what is Right Ascension, or an Hour Angle, or Greenwich Sidereal Time

The additional Toolbar

Some options will display an additional toolbar. This will fade when you move the mouse into the paint area.

The Icons Explained

Seacrh on city name for latitude and longitude coordinates. When you hover of the symbol a few cities are already defined. New searched cities wull be added to this list (for the duration of the session)

Set the time to the local noon: The sun is at the highest point in the sky

Set the time to the current moment (in UTC)

Show a list of some nice demo scenes

Switch between different applications, like sunangles on a flat and globe earth, or an explanation of how to calculate Right Ascension

In the Right Ascension and Hour Angle App show the angles from the point of view, as you would see them on that location

In the Right Ascension and Hour Angle App show the compass rose from the point of view, instead of the meredian

This Help page

Some features when viewing the animated scenes

Sequence and scenes

The animation is done in two parts: A sequence of events, build of scenes per event: A sequence is build of one, or two, function that do something, like adding 10 degrees of latitude. A sequence is shown one after the other, replacing one scene with the other.
A scene is also build by the same functions, but events are shown simultaneously.
For example:
A sequence of adding a day and a scene of adding latitude degrees will show.

The functions are:

Step = The added amount per step
Max = Maximum amount to be added.
E.g. Function = add Hour, step=4, max = 24, start date = 2019-03-01, start time = 13:00, then the following times are calculated:
Negative numbers can be used, but might lead to unexpected results, as not all are tested.

Sequence Speed

This parameter assign how fast each sequence is being replaces by a new one. 5 is the default value.

Fixed Sun Position

This is a special feature. This will rotate and tilt the globe earth to have the sun at a fixed position.

Scene Speed

This parameter assign the framespeed. When animating the scenes a low value will let you follow each step. 100 = 60 frames/second.

The mouse controls when viewing the solar system

When the application contains the solar system (i.e. when the earth is shown with the sun), the mouse controls the tilt and turn of the view. <ESC> will reset the scene, as will double clicking.

The keyboard shortcuts for the solar system view are:
Key Default Shift
<ESC>Reset Position
COpen SUNcalc for current position
XOpen MOONcalc for current position
[Slowdown scenespeed
]Speedup scenespeed
<SPACEBAR>pause animationToggle animate frames
<Previous ScenePrevious Frame
>Next SceneNext Frame
NShow (solarsystem) from Northpole
SShow (solarsystem) from Southpole
EShow (solarsystem) from East (90 latitude)
WShow (solarsystem) from West (-90 latitude)
FShow (solarsystem) from Front (0 latitude)
BShow (solarsystem) from Back (180 latitude)
?Help page

Keyboard Shortcuts when displaying the Flatearth/Globeearth

Key Default Shift Key Control key
Up ArrowTilt north away from you
Down arrowTilt North towards you
Left arrowRotate Clockwise around PolesTilt Clockwise
Right arrowRotate Anti-Clockwise aeound PolesTilt Anti-Clockwise
<ESC>Reset Position
MToggles between both globes, a flat earth and a globe earth.
YToggle Globe Earth spinning fixed on SunToggle globe auto rotation
COpen Suncalc for current position
[Slowdown ScenespeedSlowdown autorotation
]Speedup scenespeedSpeedup autorotation
<SPACEBAR>pause animationToggle animate frames
<Previous ScenePrevious Frame
>Next SceneNext Frame
NShow (globe) from Northpole
SShow (globe) from Southpole
EShow (globe) from East (90 latitude)
WShow (globe) from West (-90 latitude)
FShow (globe) from Front (0 latitude)
BShow (globe) from Back (180 latitude)
?Help page