Function AddTreeCount

src/tree_map.h:180–184

* Add a amount to the tree-count value of a tile with trees. * * This function add a value to the tree-count value of a tile. This * value may be negative to reduce the tree-counter. If the resulting * value reach 0 it doesn't get converted to a "normal" tile. * * @param t The tile to change the tree amount * @param c The value to add (or reduce) on the tree-count value * @pre Tile must be

 * @pre Tile must be of type MP_TREES
 */
inline void AddTreeCount(Tile t, int c)
{
	assert(IsTileType(t, MP_TREES)); // XXX incomplete
	t.m5() += c << 6;
}

/**
 * Returns the tree growth stage.