Camera Options and Isometric View

[elexis]

Since it can be really useful for players and people who create promotional videos to change the maxzoom or camera movement speed, we should provide a way to change these things in the options page.

The fov setting can be changed to implement an isometric view, see this setting from this demo: ​https://www.youtube.com/watch?v=NF9KTnkdlO0

view.fov = 2.0 ; This is what gives the nearly isometric view

If those other camera settings are a requirement of isometric view, then those could be enforced by locking the settings if a new isometric option entry is enabled:

view.zoom.min = 1000.0 ; Zoom needs to be this far because of low fov
view.zoom.max = 4600.0 ; Zoom needs to be this far because of low fov
view.zoom.default = 2500.0 ; Zoom needs to be this far because of low fov
view.zoom.speed = 4000.0 ; Zoom speed needs to be this high because of reasons
view.zoom.speed.wheel = 256.0 ; Zoom speed needs to be this high because of reasons
view.zoom.smoothness = 0.2 ; Lowered because of the extreme zoom
view.rotate.y.speed = 0.0 ; This prevents camera rotation
view.rotate.x.speed = 0.0 ; This prevents camera tilting
view.fov = 2.0 ; This is what gives the nearly isometric view
view.near = 40.0 ; Near plane distance increased to prevent z-fighting
view.far = 5000.0 ; To make the max zoom work