On 1/20/2017 10:08 AM, Bald Eagle wrote:
> Mike Horvath <mik### [at] gmailcom> wrote:
>
>> Are you using a perspective camera or orthographic?
>
> I re-read this, and:
> The camera for the native scene - using screen.inc, is perspective.
> I have rear, side, and orthographic views that use an orthographic camera to
> view the native perspective camera's frustum in the "meta-scene"
> The side-rear view of the perspective frustum uses a perspective camera.
>
> I've seen some references that define other frustrums (frusta?) that reshape the
> perspective frustum into a rectangular solid ("clipping frustum") I suppose for
> easier handling of the data.
> That uses a matrix to transform the perspective frustum and object coordinates.
>
> I don't see why a frustum for the native scene couldn't be orthographic - future
> work.   :)
>
>
>


I made a habit of using direction, location, up and right instead of 
look_at, angle and sky. This makes such calculations a lot easier.

Mike

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