Materials in exported OBJ

[kvark]

For levels, OBJ export will now create an associated MTL automatically. It looks like this:

newmtl t0
	Kd 0.5176471 0.5647059 0.65882355
newmtl t1
	Kd 0.5803922 0.6431373 0.47058824
newmtl t2
	Kd 0.5176471 0.4392157 0.34509805
newmtl t3
	Kd 0.3764706 0.4392157 0.3764706
newmtl t4
	Kd 0.53333336 0.4392157 0.17254902
newmtl t5
	Kd 0.8 0 0.047058824
newmtl t6
	Kd 0.7529412 0.78431374 0
newmtl t7
	Kd 0.26666668 0.3764706 0.26666668

For objects, all objects are expected to have the same MTL file. It can be generated like this:

cargo run --bin convert -- c:\data\Games\Vangers\data\resource\pal\objects.pal c:\data\Assets\Vangers\game\object.mtl

Then generating an object OBJ and just placing the "object.mtl" near it will make the materials show up:

I believe this is quite cool, because in any use of these assets having the colors/materials is immediately helpful.