Comments for eDesign.nl

Comment on Math behind a world sunlight map by Rob Smart

Rob Smart — Tue, 04 Jun 2013 16:03:08 +0000

Is this line correct?

To do this we must use sine and cosine. On time the direction of the sun will be , which is a vector pointing to the right. On (hour) that should be pointing right .

It seems to be pointing right at both times???

Comment on Math behind a world sunlight map by Joost de Folter

Joost de Folter — Sat, 29 Dec 2012 01:55:25 +0000

Excellent article thank you. This seems to be the only page explaining it, and in a very clear way.

However, please note there are several inconsistencies between mentioned equations and your source code. Only by looking at the JS code was I able to reproduce the correct behavior.

Thanks again!

Comment on Math behind a world sunlight map by João

João — Thu, 28 Jun 2012 11:18:57 +0000

Nice code, very beautiful.
But I have a problem running your code : Undefined variable: rgb on lines 207 and 208 on map.php file. Where does this variable comes from?
Thanks

Comment on Math behind a world sunlight map by Art Cady

Art Cady — Tue, 29 May 2012 03:43:30 +0000

Great information, thanks…but I believe you have a small correction to make: you say longitude are the lines parallel to the equator, I believe you meant to say perpendicular to the equator?

Comment on Math behind a world sunlight map by Admin

Admin — Sun, 27 Feb 2011 14:22:52 +0000

Hi Dan,

These images are made by NASA. I just mailed them to you. If you want the even bigger versions (originals) you should check at the nasa website. They’re free.

Regards,

Jurgen

Comment on Math behind a world sunlight map by Dan

Dan — Fri, 11 Feb 2011 20:40:48 +0000

Would it be possible to download your bigger images, too (i.e. day.png and night.png) instead of just the _live versions? Thanks!!!

Comment on Math behind a world sunlight map by AVEbrahimi

AVEbrahimi — Wed, 22 Dec 2010 01:37:57 +0000

Thank you for vivid and professional documentation.

Comment on Math behind a world sunlight map by Admin

Admin — Tue, 07 Dec 2010 14:20:21 +0000

Thanks Carlo!

Actually, the image you see here is a mercator projection. The sphere I’m talking about is just a modelling trick to calculate illumination for the map. The part about ‘mapping’ is where I discuss the transformation from the sphere model to the 2D mercator map, the result. Contact me if you need more help.

Comment on Math behind a world sunlight map by carlo

carlo — Sat, 04 Dec 2010 16:49:44 +0000

Hi very nice work! Really!
I’m planning to use your script to generate a sunlight map for a project. Unfortunately I’m using a flat mercator projection (not projected on a sphere) and I can’t understand how to change the math to create a proper sunlight map. Could you give me some suggestions? Thanks!

Comment on ColorPicker by Decoration aid « eDesign.nl

Decoration aid « eDesign.nl — Sun, 08 Aug 2010 17:47:28 +0000

[...] ColorPicker [...]