General Question Projection of the Cameraview

[huddi]

Hi!

I'm trying to figure out how the simulation environment displays the 3d-world
on the (planar) screen.
Is it just the way a pinhole camera works?

Thanks!
Huddi

 

[janczar]

Every 3D point (x,y,z) is multiplied by projection matrix. Projection matrix is 4x4 so 3D vector (x,y,z) must be extended to (x,y,z,0). First two elements of result are coordinates on 2D screen. There are well-known formulas for finding projection matrix for "observer" looking at certein point, like camera, but projection matrix may give other projections than "camera view".

 

[huddi]

okay, but which projection matrix (or projection method) is used in orbiter?