It has some excellent novel features. Many other features are built in eg superimposing graphs, changing axes, various grid backgrounds etc. Full documentation is in a seperate file in the GrafEq folder. This interactive world clock has a beautiful satellite-based graphic interface displaying the world and the current extent of darkness. Simultaneous times can be displayed in four different locations of your choice.
Particulary nice is the sundial display illustrating the length of shadow at particular times.
An animation takes you round the world during the course of a day. Follow the Earth's shadow as the sun revolves while watching the sundial's shadow. The model can be rotated in various directions. About Prime Download Site Generate a list of Primes from, for example1 to 1000000, at an unbelievably fast speed and then use your list to factorise very large numbers. This is a fairly basic pattern drawing program that allows experimentation with the various wallpaper symmetries, frieze symmetries and interestingly some rosette symmetries.