// Called by AIPlayer script to play its move.
public void AIPlayMoveAt(int cell, pieces piece)
{
GridCellScript gcs = gridCells [cell];
gcs.state = (piece == pieces.X) ? GridCellScript.CellStates.X : GridCellScript.CellStates.O;
gHandler.NextTurn(); // trigger next turn.
}
// LateUpdate is called once per frame, after everything has been rendered.
void LateUpdate()
{
// This test suspends all GUI activity if a game-over animation is running.
if (!suspendInteractions)
{
if (!(gInfo.state == GameInfo.GameStates.inGUI))
{
button_RESIGN.gameObject.SetActive(true);
button_PLAY.gameObject.SetActive(false);
// Only a minimal GUI is shown in play:
// We show only the current player's label and piece ("O" or "X") to show whose turn it is.
// Everything else is hidden...
if (gInfo.state == GameInfo.GameStates.playing_plr1)
{
player1_Label.gameObject.SetActive(true);
player1_O.gameObject.SetActive((gInfo.GetPlayerPiece(GameInfo._PLAYER1) == pieces.O) ? true : false);
player1_X.gameObject.SetActive((gInfo.GetPlayerPiece(GameInfo._PLAYER1) == pieces.X) ? true : false);
player2_Label.gameObject.SetActive(false);
player2_O.gameObject.SetActive(false);
player2_X.gameObject.SetActive(false);
}
else // must be Player 2's turn...
{
player2_Label.gameObject.SetActive(true);
player2_O.gameObject.SetActive((gInfo.GetPlayerPiece(GameInfo._PLAYER2) == pieces.O) ? true : false);
player2_X.gameObject.SetActive((gInfo.GetPlayerPiece(GameInfo._PLAYER2) == pieces.X) ? true : false);
player1_Label.gameObject.SetActive(false);
player1_O.gameObject.SetActive(false);
player1_X.gameObject.SetActive(false);
}
}
if (gInfo.state == GameInfo.GameStates.inGUI)
{
// As we're not playing a game, make sure both player labels are shown:
player1_Label.gameObject.SetActive(true);
player2_Label.gameObject.SetActive(true);
// Now update the GUI according to the content of gInfo...
Player p = gInfo.GetPlayer(GameInfo._PLAYER1);
// This next test doesn't trigger an error. Its purpose is to prevent a crash.
if (p != null)
{
player1_Computer.gameObject.SetActive(p.PlayerIs == beings.AI);
player1_Human.gameObject.SetActive(p.PlayerIs == beings.Human);
player1_O.gameObject.SetActive(p.PlayingAs == pieces.O);
player1_X.gameObject.SetActive(p.PlayingAs == pieces.X);
}
// ditto for Player 2...
p = gInfo.GetPlayer(GameInfo._PLAYER2);
if (p != null)
{
player2_Computer.gameObject.SetActive(p.PlayerIs == beings.AI);
player2_Human.gameObject.SetActive(p.PlayerIs == beings.Human);
player2_O.gameObject.SetActive(p.PlayingAs == pieces.O);
player2_X.gameObject.SetActive(p.PlayingAs == pieces.X);
}
// set buttons at top...
button_RESIGN.gameObject.SetActive(false);
button_PLAY.gameObject.SetActive(true);
}
// What follows is very, very messy.
// Once the new Unity GUI system is released, all you see here will likely be replaced.
// Basically, when the user clicks on anything in our fake Sprite-based GUI,
// we simply grab the Collider's tag to find out what they clicked on and act accordingly.
// Note that we use "GetButtonUp" here.
/*
* The "ButtonUp" state is only sent when a key or button has been released.
*
* GetButtonDown could be used too, but waiting for the button to be released makes it less likely that the player will accidentally toggle an element twice in quick succession.
* GetButtonDown will always return true if a button is pressed and would result in our toggling the GUI elements very rapidly until the button is released.
* I'd need to include a latching mechanism to prevent this – a process known as 'debouncing' – which is a process a proper GUI system would take care of for me.
*
*/
if (Input.GetButtonUp("Fire1"))
{
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit2D hit = Physics2D.GetRayIntersection(ray);
if (hit)
{
string t = hit.collider.tag;
Player p1 = gInfo.GetPlayer(GameInfo._PLAYER1); // we'll need this info shortly.
Player p2 = gInfo.GetPlayer(GameInfo._PLAYER2);
if (!(gInfo.state == GameInfo.GameStates.inGUI))
{
if (t == "btn_RESIGN") // this is the only working button in the GUI when playing.
{
gInfo.state = GameInfo.GameStates.inGUI;
}
else if (t == "gridCell") // clicked on a board cell.
// the board cells should only be clickable if the current player is a human.
{
if (gInfo.GetCurrentPlayer().PlayerIs == beings.Human)
{
GridCellScript gcScript = hit.collider.gameObject.GetComponent <GridCellScript> ();
if (gcScript.state == GridCellScript.CellStates.empty)
{
// we know we're playing a game, the target cell is empty, and the current player is a human, so work out whose turn it is and put their symbol on the cell.
if (gInfo.GetCurrentPlayer().PlayingAs == pieces.O)
{
gcScript.state = GridCellScript.CellStates.O;
}
else
{
gcScript.state = GridCellScript.CellStates.X;
}
NextTurn(); // Swap player.
}
}
}
}
else // (i.e. not playing a game)
// these are all simple toggles, so clicking on "Computer" will set the player to "Human",
// clicking on "X" sets the piece to "O", etc.
{
if (t == "player1_Computer")
{
// set to "Human" player.
gInfo.SetPlayer(GameInfo._PLAYER1, beings.Human, p1.PlayerName, p1.PlayingAs);
}
// second verse, same as the first...
if (t == "player1_Human")
{
// set to "Computer" player.
gInfo.SetPlayer(GameInfo._PLAYER1, beings.AI, p1.PlayerName, p1.PlayingAs);
}
// The rest is much the same...
if (t == "player1_O")
{
// set to "X" piece. This means toggling Player 2's piece too.
gInfo.SetPlayer(GameInfo._PLAYER1, p1.PlayerIs, p1.PlayerName, pieces.X);
gInfo.SetPlayer(GameInfo._PLAYER2, p2.PlayerIs, p2.PlayerName, pieces.O);
}
if (t == "player1_X")
{
// set to "O" piece...
gInfo.SetPlayer(GameInfo._PLAYER1, p1.PlayerIs, p1.PlayerName, pieces.O);
gInfo.SetPlayer(GameInfo._PLAYER2, p2.PlayerIs, p2.PlayerName, pieces.X);
}
// And now, the same trick again, but for Player 2...0
if (t == "player2_Computer")
{
// set to "Human" player.
gInfo.SetPlayer(GameInfo._PLAYER2, beings.Human, p2.PlayerName, p2.PlayingAs);
}
// Praise be to whoever invented copy and paste...
if (t == "player2_Human")
{
// set to "Computer" player.
gInfo.SetPlayer(GameInfo._PLAYER2, beings.AI, p2.PlayerName, p2.PlayingAs);
}
if (t == "player2_O")
{
// set to "X" piece. This means toggling Player 1's piece too.
gInfo.SetPlayer(GameInfo._PLAYER2, p2.PlayerIs, p2.PlayerName, pieces.X);
gInfo.SetPlayer(GameInfo._PLAYER1, p1.PlayerIs, p1.PlayerName, pieces.O);
}
if (t == "player2_X")
{
// set to "O" piece...
gInfo.SetPlayer(GameInfo._PLAYER2, p2.PlayerIs, p2.PlayerName, pieces.O);
gInfo.SetPlayer(GameInfo._PLAYER1, p1.PlayerIs, p1.PlayerName, pieces.X);
}
// We're not yet playing a game, so we'll check for the "Play" button here...
if (t == "btn_PLAY")
{
// Now we need to hide most of the GUI.
// We only want the "Player [n]: [piece]" part, alternating each turn.
// So first, we'll hide the rest...
Player p = gInfo.GetPlayer(GameInfo._PLAYER1);
player1_Computer.gameObject.SetActive(false);
player1_Human.gameObject.SetActive(false);
player1_O.gameObject.SetActive(p.PlayingAs == pieces.O);
player1_X.gameObject.SetActive(p.PlayingAs == pieces.X);
// Player 1 always plays first, so hide Player 2's info...
player2_Computer.gameObject.SetActive(false);
player2_Human.gameObject.SetActive(false);
player2_O.gameObject.SetActive(false);
player2_X.gameObject.SetActive(false);
// PLAY button clicked, so set Game In Progress status:
board.ClearBoard();
gInfo.StartPlaying();
CheckAndPlayAI(); // check if current player is an AI, and play his move if so.
}
}
}
}
}
}