Function DrawRoadAsSnowOrDesert

src/road_cmd.cpp:1353–1358

* Should the road be drawn as a unpaved snow/desert road? * By default, roads are always drawn as unpaved if they are on desert or * above the snow line, but NewGRFs can override this for desert. * * @param snow_or_desert Is snowy or desert tile * @param roadside What sort of road this is * @return True if snow/desert road sprites should be used. */

 * @return True if snow/desert road sprites should be used.
 */
static bool DrawRoadAsSnowOrDesert(bool snow_or_desert, Roadside roadside)
{
	return (snow_or_desert &&
			!(_settings_game.game_creation.landscape == LandscapeType::Tropic && HasGrfMiscBit(GrfMiscBit::DesertPavedRoads) &&
				roadside != Roadside::Barren && roadside != Roadside::Grass && roadside != Roadside::GrassRoadWorks));
}

/**
 * Draws the catenary for the RoadType of the given tile