bool TileArea::Intersects(const TileArea &ta) const

{

	if (ta.w == 0 || this->w == 0) return false;

	assert(ta.w != 0 && ta.h != 0 && this->w != 0 && this->h != 0);

	uint left1   = TileX(this->tile);

	uint top1    = TileY(this->tile);

	uint right1  = left1 + this->w - 1;

	uint bottom1 = top1  + this->h - 1;

	uint left2   = TileX(ta.tile);

	uint top2    = TileY(ta.tile);

	uint right2  = left2 + ta.w - 1;

	uint bottom2 = top2  + ta.h - 1;

	return !(

			left2   > right1  ||

			right2  < left1   ||

			top2    > bottom1 ||

			bottom2 < top1

		);

}