Function CalculateSnowLine

src/landscape.cpp:1590–1594

* Calculate the line from which snow begins. */

 * Calculate the line from which snow begins.
 */
static void CalculateSnowLine()
{
	/* We do not have snow sprites on coastal tiles, so never allow "1" as height. */
	_settings_game.game_creation.snow_line_height = std::max(CalculateCoverageLine(_settings_game.game_creation.snow_coverage, 0), 2u);
}

/**
 * Calculate the line (in height) between desert and tropic.