Support trimetric maps

Hi Bjorn,

I am wondering if it would be possible to support Trimetic maps in addition to isometric ones.
( http://en.wikipedia.org/wiki/Axonometric_projection#/media/File:Graphical_projection_comparison.png )

I know trimetric isn't the most used kind of map, but it provides really great results for some kind of games so this might be a great feature.

I am only familiar with TMX parsing and rendering, but I took the freedom to look at the source code, and found few references:
-> map.h
-> newmapdialog.h
-> trimeticrenderer.h (That do not exist yet..).

I guess this is more a matter of rendering the map rather than changing the map models. Or I missed something ?

Thanks for your help on this matter. I am trying to assess the complexity of getting a complete tool chain for trimetic games up and running.. (including Tiled)..

thanks.

Start by reading map.h and newmapdialog.h and checking how the existing isometric rendering is wired; trimeticrenderer.h is proposed in the issue but does not exist. The issue needs a defined editor workflow and acceptance criteria for trimetric maps before completion can be assessed.

Written by the indexing model from the issue text.