Data from models accessed in rendering stage

[hansfilipelo]

On each model, in each render loop, we access these properties:

model->draw_me
model->mesh->diffuse_map->id
model->mesh->specular_map->id
model->mesh->normal_map->id
mesh->get_VAO()

We could probably increase our cache-hit-rate a lot by putting these properties in a struct and then the struct for each model i a vector. I'll work with this starting today - or is there anything else we should look at that's more critical?

[hansfilipelo]

Also using these when culling:

model->bounding_sphere_radius
model->scale
Center point for model