Add materials to OBJ files

[Agustin Alba Chicar]

Add simple materials to OBJ files. Mainly for the roads.

[Agustin Alba Chicar]

Got to create MCity with a solid color. The following pictures shows MCity with a green color for all the roads (in Blender).

In Drake Visualizer we have the following:

As we can see, Drake is not loading the material information of the mesh. There are some other options for this. we need further investigation with it. Also, Meshlab cannot render the material. From the samples we have, I can confirm that the only material could not be loaded was defined as just a color and didn't link to an image.

[Agustin Alba Chicar]

In #98 there is an explanation of how to load the obj files with a mtl file. The file was generated ok but there is a problem with the visualizer and it's support to mtl files from the IO of the program.

[Agustin Alba Chicar]

Added code to smooth lane junctions. refs #96

→ <<cset 573cc9f7e101>>

[Agustin Alba Chicar]

Added support for materials. refs #96

→ <<cset 1bdf80f1f1e7>>

[Agustin Alba Chicar]

Merged in agalbachicar/terminus-simulation/Issue/#96_Add_materials_to_OBJ_files (pull request #55)

close #96

Issue/#96 Add materials to OBJ files

Approved-by: Andrés Fortier

→ <<cset 740a5e7f2909>>