Hi i am rather new to computergraphics but i am trying to map an equirectangular image (360 video) to the inside of a sphere now i found the following formula to do this.
phi = 2*Pi*u cos(theta) = 2*v -1
But how do i get
v ? In the article he talks about this:
So we can just project the sphere points in the xy plane onto the unit radius cylinder and unwrap it! If we have such an image with texture coordinates (u,v) in [0,1]^2
But how do i get those texture coordinates from and image with lets say the following dimensions 4096x2048 pixels?
Sorry if this is a bit vague, i am trying to understand it myself. If clarification is needed i am happy to edit my question!