Scale for OrthographicProjection

[ahfuckme]

Right now, the OrthographicProjection seems to have the units in pixels, which makes any 3d renders very small compared to the same render using PerspectiveProjection. Perhaps there should be a Scale field added to the OrthographicProjection and used here to allow one to shrink the very wide field of view.

[jpetkau]

Just ran into this too. It will use a scale attached to the entity, and Camera2dComponents adds a uniform scale, but since it's a uniform scale it scales in XYZ, which messes up the depth (in a 2D game, if scale <1.0, then sprites don't draw at all because they're outside of zmin..zmax).

At minimum it needs a nonuniform scale, which means you can't use Camera2dComponents (or you need to manually remove the uniform scale that it creates.)

Ideally I think OrthographicProjection should replace window_origin with a more explicit enum that covers more options, something like:

• pixels with (0,0) in lower-left, Y up
• pixels with (0,0) in top-left, Y down
• pixels with (0,0) at center, Y up
• H units tall and/or W units wide, with different aspect ratios handled as:
  (1) H exact, adjust W to preserve aspect ratio
  (2) W exact, adjust H to preserve aspect ratio
  (3) minimum of (1) or (2)
  (4) maximum of (1) or (2)
  (5) exactly H*W, so don't preserve 1:1 aspect ratio

[alice-i-cecile]

I believe this was solved by #400 getting merged :)