FISHEYE FROM PANARAMA

Ok. Time to admit to my maths not being the greatest, how would you approach...turning a panoramic image into a fisheye.

I am guessing it's either very simple or highly complex.

Rectangle to polar (I guess)

what exactly is "fisheye"

could someone explain it please?

Google is your amigo.

Grrrrrr! I spelt the title wrong? Is there a way to correct?

Nate: Fisheye. As Khomy says, google is your friend. Dont make me type it. :)


Anyway, I need some direction; want to turn a rectagular image (2048 * 256) into a sphere, for skydome gerenation.

I would sphere map the image as a texture and apply it to a sphere mesh than render what's on screen.

Yeah, rather let Direct3D do the work for you. Albeit not as well as you would with Shaders.

You'll need to have a special dome-like object. You can use CopyRect to copy the contents of the screen to a texture (that texture being applied to that dome) and have a real-time fish eye.

The most important things are the shape of the dome and it's mapping coordinates.

Ok....time to clarify

I dont want to map anything....I want to...

Create a bunch of sprites, place them on a wide image (pano) in a fashion that simulates clouds.

Take my new image (pano full of clouds) and do a 'rectangle to polar' operation, thus producing a cloud map useful for many applications.

Do you mean you want to "squeeze" the original image to a form so that when you apply it to a sphere or cube skybox then it will look normal?

Like this example?

Skymap Photo

or round like this Photoshop tutorial?

Crystal Ball

Ok...the first link (Skymap Photo) is basically what I want to create as my image to process.

And yes, the Crystal Ball tutorial if the result of 'rect. to polar'

As I stated at the begining of this thread, my Maths isnt great.

There must be an Algorithm to use in B3D that takes a rectangle and curves it so that both ends meet, but probably too complex....not sure

Anyone know?