void world_routes_place_curve( world_instance *world, ent_route *route,
v4f h[3], v3f n0, v3f n2, scene_context *scene,
pointcloud_buffer *pcbuf )
void world_routes_place_curve( world_instance *world, ent_route *route,
v4f h[3], v3f n0, v3f n2, scene_context *scene,
pointcloud_buffer *pcbuf )