Teeworlds - development

I would not expect undo to affect a viewport

10:09

I could do a zoom out of something small to see a big picture then press a undo/undo couple of times to see how it affects a big picture

10:10

that way I use gimp/photoshop

10:10

if undo would get me back to zoomed in state or just onto another part of a map that would annoy me

10:11

*undo/redo couple of times

yeah

Offset ticks by first tick of demo to fix animation smoothness problems because of floating point precision (closes #2743).
Move division by TickSpeed outside the mix-call to only divide once.
Call RenderEvalEnvelope statically because it is static.