CheckConnectionResult CheckConnection(int x, int z)
{
CheckConnectionResult res = new CheckConnectionResult();
List <BlockModel> blocks = res.blocks;
BlockModel block = grid.Get(x, z);
if (block == null)
{
return(res); // no block in the current position
}
blocks.Add(block);
BlockWithDir next = new BlockWithDir(block, block.dir2);
while ((next = GetNext(next)) != null)
{
if (block == next.Block)
{
break;
}
blocks.Add(next.Block);
}
if (next != null)
{
res.isLoop = true;
return(res); // a loop is available
}
next = new BlockWithDir(block, block.dir1);
while ((next = GetNext(next)) != null)
{
blocks.Add(next.Block);
}
return(res); // no loop available
}
List <BlockModel> CheckConnection(Pos pos)
{
List <BlockModel> blocks = new List <BlockModel>();;
BlockModel block = grid.Get(pos.x, pos.z);
if (block == null)
{
return(blocks);
}
blocks.Add(block);
BlockWithDir next = new BlockWithDir(block, block.dir2);
while ((next = GetNext(next)) != null)
{
if (block == next.Block)
{
break;
}
blocks.Add(next.Block);
}
if (next != null)
{
return(blocks);
}
next = new BlockWithDir(block, block.dir1);
while ((next = GetNext(next)) != null)
{
blocks.Add(next.Block);
}
return(blocks);
}
BlockWithDir GetNext(BlockWithDir prev)
{
HexDirection dir = prev.Dir;
BlockModel block = prev.Block;
int x = block.x;
int z = block.z;
if (dir == HexDirection.E)
{
x += 1;
}
if (dir == HexDirection.W)
{
x -= 1;
}
if (dir == HexDirection.NE)
{
x += (z % 2);
z += 1;
}
if (dir == HexDirection.NW)
{
x += (z % 2) - 1;
z += 1;
}
if (dir == HexDirection.SE)
{
x += (z % 2);
z -= 1;
}
if (dir == HexDirection.SW)
{
x += (z % 2) - 1;
z -= 1;
}
BlockModel next = grid.Get(x, z);
if (next == null)
{
return(null);
}
HexDirection opp = dir.Opposite();
if (next.dir1 == opp)
{
return(new BlockWithDir(next, next.dir2));
}
if (next.dir2 == opp)
{
return(new BlockWithDir(next, next.dir1));
}
return(null);
}
BlockWithDir GetNext(BlockWithDir prev)
{
HexDirection dir = prev.Dir;
Pos pos = GetNextPos(new Pos(prev.Block.x, prev.Block.z), dir);
BlockModel next = grid.Get(pos.x, pos.z);
if (next == null)
{
return(null);
}
HexDirection opp = dir.Opposite();
if (next.dir1 == opp)
{
return(new BlockWithDir(next, next.dir2));
}
if (next.dir2 == opp)
{
return(new BlockWithDir(next, next.dir1));
}
return(null);
}