It wasn't too hard.... I did take a peak at the code behind the fish eye that Jason Waltman describes. I did this purely because the code I implemented seemed to match the pseduo code that was written but my results were not quite correct. I looked at the code, converted it to c# implemented it as a filter in the Tiger Image Processing Library (Tiger Imaging) for C# here and it worked pretty much the first time it was tan.I understand a bit more about polar co-ordinates now as well :)Basically we have are our normal Cartesian Co-ordinates (x,y) which are used on our screens as pixel locations ((0,0) is the top left, (10,10) is 10 pixels in from the top left etc). Polar co-ordinates are co-ordinates that are specified in Angles and units from the center of a Circle .... I think!So a Polar Co-ordinate (angle = 45, radius = 20) would mean that the point we want is 45 degrees from North and 20 units out from the centre.This is useful in the Fish Eye Effect which needs to work out what pixels will be in the fish eye region.The Fish eye effect has two basic stages
- Work out which pixel should be fish eyed
- If a pixel needs to be fish eyed, work out where the pixel should be placed based on where it is in the fish eye's view.
About Me: Paul Kinlan
I lead the Chrome Developer Relations team at Google.
We want people to have the best experience possible on the web without having to install a native app or produce content in a walled garden.
Our team tries to make it easier for developers to build on the web by supporting every Chrome release, creating great content to support developers on web.dev, contributing to MDN, helping to improve browser compatibility, and some of the best developer tools like Lighthouse, Workbox, Squoosh to name just a few.