Fluid pressure equalization

gistfile1.java

    /**
     * Equalize water pressure (think of how water acts in a U-tube)
     * @param world
     * @param cx Current X Coordinate
     * @param cy
     * @param cz
     * @param ox Original X Coordinate
     * @param oy
     * @param oz
     * @param data Metadata
     * @param iter Current iteration (try to avoid stack overflows...)
     * @param visited Blocks visited
     * @return
     */
	private boolean tryToEqualize(World world, int cx, int cy, int cz, int ox,
			int oy, int oz, int data, int iter, List<Location> visited) {
		// If water, and there's a block nearby with air above it...
		int water = mod_NWater.nwater.blockID;
		int stillWater = mod_NWater.nwater_still.blockID;
		if (blockID != water)
			return false;
		int thisblock =world.getBlockId(cx, cy, cz);
		if ( thisblock != stillWater && thisblock != water) {
			return false;
		}
		if(world.getBlockId(cx, cy + 1, cz) == 0) {
			// And the air block is at least one block below us...
			if (cy + 1 < oy) {
				placeWater(world, cx, cy + 1, cz, 1, 1);
				if (data - 1 < 0) {
					world.setBlockAndMetadata(ox, oy, oz, 0, 0);
				} else {
					world.setBlockMetadata(ox, oy, oz, data - 1);
				}
				return true;
			}
		}
		iter++;
		if (iter == 100)
			return true;
		
		visited.add(new Location(cx, cy, cz));
		
		// Recursive flood fill.
		if (!visited.contains(new Location(cx - 1, cy, cz))
				&& tryToEqualize(world, cx - 1, cy, cz, ox, oy, oz, data, iter,
						visited))
			return true; // West
		if (!visited.contains(new Location(cx + 1, cy, cz))
				&& tryToEqualize(world, cx + 1, cy, cz, ox, oy, oz, data, iter,
						visited))
			return true; // East
		if (!visited.contains(new Location(cx, cy, cz - 1))
				&& tryToEqualize(world, cx, cy, cz - 1, ox, oy, oz, data, iter,
						visited))
			return true; // North
		if (!visited.contains(new Location(cx, cy, cz + 1))
				&& tryToEqualize(world, cx, cy, cz + 1, ox, oy, oz, data, iter,
						visited))
			return true; // South
		if (!visited.contains(new Location(cx, cy - 1, cz))
				&& tryToEqualize(world, cx, cy - 1, cz, ox, oy, oz, data, iter,
						visited))
			return true; // Down
		return false;
	}