Objects jump when first moved

[Philip Taylor]

Create an object in Atlas. Zoom in and move the camera so the object is near a corner of the screen. With the object-move tool, click the unit and try moving by a single pixel. It jumps towards the edge of the screen by dozens of pixels.

It seems the cause is that CCamera::GetScreenCoordinates and CCamera::GetWorldCoordinates are not exact inverses - for points near the edge of the screen, the difference is quite significant. (GetWorldCoordinates requires integer pixel values, but I don't think that'd cause errors of more than one screen-space pixel (which would be acceptable) - it's probably some difference in the algorithms used to convert between spaces.)

[(none)]

Milestone Atlas Stage 2 deleted

[philip]

(In [8870]) Fix perspective calculation in CCamera::GetScreenCoordinates. Fixes #99.