public void usePortal(int i)
    {
        int j = thePlayer.dimension;
        thePlayer.dimension = i;
        theWorld.setEntityDead(thePlayer);
        thePlayer.isDead = false;
        double d = thePlayer.posX;
        double d1 = thePlayer.posZ;
        double d2 = 1.0D;
        if(j > -1 && thePlayer.dimension == -1)
        {
            d2 = 0.125D;
        } else
        if(j == -1 && thePlayer.dimension > -1)
        {
            d2 = 8D;
        }
        d *= d2;
        d1 *= d2;
        if(thePlayer.dimension == -1)
        {
            thePlayer.setLocationAndAngles(d, thePlayer.posY, d1, thePlayer.rotationYaw, thePlayer.rotationPitch);
            if(thePlayer.isEntityAlive())
            {
                theWorld.updateEntityWithOptionalForce(thePlayer, false);
            }
            World world = null;
            world = new World(theWorld, WorldProvider.getProviderForDimension(thePlayer.dimension));
            changeWorld(world, "Entering the Nether", thePlayer);
        } else
        if(thePlayer.dimension == 0)
        {
            if(thePlayer.isEntityAlive())
            {
                thePlayer.setLocationAndAngles(d, thePlayer.posY, d1, thePlayer.rotationYaw, thePlayer.rotationPitch);
                theWorld.updateEntityWithOptionalForce(thePlayer, false);
            }
            World world1 = null;
            world1 = new World(theWorld, WorldProvider.getProviderForDimension(thePlayer.dimension));
            if(j == -1)
            {
                changeWorld(world1, "Leaving the Nether", thePlayer);
            } else
            {
                changeWorld(world1, "Leaving the End", thePlayer);
            }
        } else
        {
            World world2 = null;
            world2 = new World(theWorld, WorldProvider.getProviderForDimension(thePlayer.dimension));
            ChunkCoordinates chunkcoordinates = world2.func_40472_j();
            d = chunkcoordinates.posX;
            thePlayer.posY = chunkcoordinates.posY;
            d1 = chunkcoordinates.posZ;
            thePlayer.setLocationAndAngles(d, thePlayer.posY, d1, 90F, 0.0F);
            if(thePlayer.isEntityAlive())
            {
                world2.updateEntityWithOptionalForce(thePlayer, false);
            }
            changeWorld(world2, "Entering the End", thePlayer);
        }
        thePlayer.worldObj = theWorld;
        System.out.println((new StringBuilder()).append("Teleported to ").append(theWorld.worldProvider.worldType).toString());
        if(thePlayer.isEntityAlive() && j < 1)
        {
            thePlayer.setLocationAndAngles(d, thePlayer.posY, d1, thePlayer.rotationYaw, thePlayer.rotationPitch);
            theWorld.updateEntityWithOptionalForce(thePlayer, false);
            (new Teleporter()).placeInPortal(theWorld, thePlayer);
        }
    }