WIP: MSTS consist / vehicle parser

[leezer3]

Heavy work in progress here, highly likely to explode unexpectedly.....
n.b. Contains the changes from #167 although not hooked up to anything yet, should work when this is done.

This will load (some) MSTS consists to a working visual train.
Not even thought about physics and stuff yet.
The new renderer is absolutely required for these to get a sensible framerate, and even this is still a little slow. We need to detect somehow if the proportion of texture in use for any given face uses alpha.

Unfortunately, the inbuilt consist / vehicle parser seems to have been very forgiving of errors in the textual block, which means that I'm still very much rehacking the base parser as I go along.....
Proabably want to cherry-pick the parser changes into the mainline branch.

30-odd van train from the 3DTS Cambrian route.

Class 47 & TEA tankers from Making Tracks' Network South East route.

[leezer3]

Have picked out the fixes to the format parser, through piped brake type and the renderer tweaks and rebased this back onto the head of master.
Probably going to end up doing this a lot, as there are too many half-features we need to get the whole thing working.....

[leezer3]

Took a little more bashing, but we can now load a MSTS consist into the main game.
Nothing really works (yet), so no physics, controls etc. but if nothing else we could just load a default set of acceleration curves.

Large detailed consists are rather slower than I'd like though, although this is poly-count related as opposed to anything else. We still need to find some speedups in the GL3 renderer.

Further Thoughts:

• Everything not in the Train.MsTs plugin probably wants picking into master (again), as otherwise this will end up getting out of sync. Probably needs doing repeatedly every time something is fixed.....
• No acceleration curves in MSTS as such. All it's got is stuff like max power numbers. Divide these by notches as a first step?
• Need a percentage based power / brake controller. Been on the list for a while :/
• Need to deal with the keyframe animations in MSTS stuff. Should be easier with the new renderer.

[leezer3]

A little more work done.

Cabviews now load, but need a lot of components integrating. Camera restriction also appears to be broken.

If wheelspin is disabled, we can actually move our trains. No sound, brakes or power notch simulation at the minute mind, so not exactly useful.
Need to also consider refactoring the acceleration curves a bit.
Also highlights the fact that wheels don't rotate :/ Need to investigate that properly- I believe that an animation frame for wheels pulls out the wheel radii from the engine properties, and presumably twiddles via speed and this. Would wheel radii be useful for animated files?!

[leezer3]

Animation changes really want pulling to master when completed & working- This is a common method of doing things.

Haven't tested performance yet, perhaps this would be better in shader when completed?!

Unsure how complete the rest of this is at the minute....

[leezer3]

API changes pulled out and merged into master, just to try and keep things in better sync.

[leezer3]

This branch will now load the new hierarchy objects.
All complex parts appear to be where they should in a static object, which is encouraging.....

However, it doesn't get them into train exteriors, as the CarSection is tied to the current animated object. Still fiddling, heavy WIP.