WIN API sunset time information

[omniausente]

Hello,

I was searching in windows api reference and I haven't found any win api function that retrieves the sunset or sunrise time information, but a friend of mine sweared me that it exists...

Anyone knows if it exists? If not is it possible to calculate it without location information?

Thanks,
Tiago Brunhoso Nunes

[hoxsiew]

http://lmgtfy.com/?q=sunrise+sunset+algorithm

[0xC0000005]

http://lmgtfy.com/?q=sunrise+sunset+algorithm

I usually find those "Let me Google that for you" posts to be more funny than helpful, but this is a good one. The very first entry in the Google results contains a very interesting algorithm. Of course it's not C++ but any good programmer should have no trouble at all creating code from it.

Sunrise/Sunset Algorithm

[0xC0000005]

is it possible to calculate it without location information?

Longitude can be approximated by time-zone information but Latitude, which I would say is more important, can't. You could always use a typical value such as 40 degrees north for U.S. and Europe, etc. but any generalization of longitude and latitude will add to the error of your calculation.

[hoxsiew]

I usually find those "Let me Google that for you" posts to be more funny than helpful, but this is a good one. The very first entry in the Google results contains a very interesting algorithm. Of course it's not C++ but any good programmer should have no trouble at all creating code from it.

Sunrise/Sunset Algorithm

Yes, I read through that one and found it very interesting.

[omniausente]

Thanks for the answers!

From your posts I conclude that the windows api itself doesn't have this kind of information...

And thanks also for the longitude aproximation tip... it can be useful!

PS: This was not intended to be a "Google it for me" question, as I already made that search by my self. I was only thinking that windows api could have this info for me... I just need to know if it is day or night