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/* This script file handles the game logic */
//Note that X/Y referred to here are in game coordinates
var maxX = 10;//Nums are for tileSize 40
var maxY = 15;
var maxIndex = maxX*maxY;
var board = new Array(maxIndex);
var tileSrc = "Block.qml";
var component;
//Index function used instead of a 2D array
function index(xIdx,yIdx) {
return xIdx + (yIdx * maxX);
}
function initBoard()
{
for(var i = 0; i<maxIndex; i++){
//Delete old blocks
if(board[i] != null)
board[i].destroy();
}
//Calculate board size
maxX = Math.floor(gameCanvas.width/gameCanvas.tileSize);
maxY = Math.floor(gameCanvas.height/gameCanvas.tileSize);
maxIndex = maxY*maxX;
//Close dialogs
dialog.forceClose();
//Initialize Board
board = new Array(maxIndex);
gameCanvas.score = 0;
for(var xIdx=0; xIdx<maxX; xIdx++){
for(var yIdx=0; yIdx<maxY; yIdx++){
board[index(xIdx,yIdx)] = null;
createBlock(xIdx,yIdx);
}
}
}
function createBlock(xIdx,yIdx){
if(component==null)
component = createComponent(tileSrc);
// Note that we don't wait for the component to become ready. This will
// only work if the block QML is a local file. Otherwise the component will
// not be ready immediately. There is a statusChanged signal on the
// component you could use if you want to wait to load remote files.
if(component.isReady){
var dynamicObject = component.createObject();
if(dynamicObject == null){
print("error creating block");
print(component.errorsString());
return false;
}
dynamicObject.type = Math.floor(Math.random() * 3);
dynamicObject.parent = gameCanvas;
dynamicObject.x = xIdx*gameCanvas.tileSize;
dynamicObject.y = yIdx*gameCanvas.tileSize;
dynamicObject.width = gameCanvas.tileSize;
dynamicObject.height = gameCanvas.tileSize;
board[index(xIdx,yIdx)] = dynamicObject;
}else{//isError or isLoading
print("error loading block component");
print(component.errorsString());
return false;
}
return true;
}
var fillFound;//Set after a floodFill call to the number of tiles found
var floodBoard;//Set to 1 if the floodFill reaches off that node
//NOTE: Be careful with vars named x,y, as the calling object's x,y are still in scope
//![1]
function handleClick(x,y)
{
var xIdx = Math.floor(x/gameCanvas.tileSize);
var yIdx = Math.floor(y/gameCanvas.tileSize);
if(xIdx >= maxX || xIdx < 0 || yIdx >= maxY || yIdx < 0)
return;
if(board[index(xIdx, yIdx)] == null)
return;
//If it's a valid tile, remove it and all connected (does nothing if it's not connected)
floodFill(xIdx,yIdx, -1);
if(fillFound <= 0)
return;
gameCanvas.score += (fillFound - 1) * (fillFound - 1);
shuffleDown();
victoryCheck();
}
//![1]
function floodFill(xIdx,yIdx,type)
{
if(board[index(xIdx, yIdx)] == null)
return;
var first = false;
if(type == -1){
first = true;
type = board[index(xIdx,yIdx)].type;
//Flood fill initialization
fillFound = 0;
floodBoard = new Array(maxIndex);
}
if(xIdx >= maxX || xIdx < 0 || yIdx >= maxY || yIdx < 0)
return;
if(floodBoard[index(xIdx, yIdx)] == 1 || (!first && type != board[index(xIdx,yIdx)].type))
return;
floodBoard[index(xIdx, yIdx)] = 1;
floodFill(xIdx+1,yIdx,type);
floodFill(xIdx-1,yIdx,type);
floodFill(xIdx,yIdx+1,type);
floodFill(xIdx,yIdx-1,type);
if(first==true && fillFound == 0)
return;//Can't remove single tiles
board[index(xIdx,yIdx)].opacity = 0;
board[index(xIdx,yIdx)] = null;
fillFound += 1;
}
function shuffleDown()
{
//Fall down
for(var xIdx=0; xIdx<maxX; xIdx++){
var fallDist = 0;
for(var yIdx=maxY-1; yIdx>=0; yIdx--){
if(board[index(xIdx,yIdx)] == null){
fallDist += 1;
}else{
if(fallDist > 0){
var obj = board[index(xIdx,yIdx)];
obj.y += fallDist * gameCanvas.tileSize;
board[index(xIdx,yIdx+fallDist)] = obj;
board[index(xIdx,yIdx)] = null;
}
}
}
}
//Fall to the left
var fallDist = 0;
for(var xIdx=0; xIdx<maxX; xIdx++){
if(board[index(xIdx, maxY - 1)] == null){
fallDist += 1;
}else{
if(fallDist > 0){
for(var yIdx=0; yIdx<maxY; yIdx++){
var obj = board[index(xIdx,yIdx)];
if(obj == null)
continue;
obj.x -= fallDist * gameCanvas.tileSize;
board[index(xIdx-fallDist,yIdx)] = obj;
board[index(xIdx,yIdx)] = null;
}
}
}
}
}
//![2]
function victoryCheck()
{
//awards bonuses for no tiles left
var deservesBonus = true;
for(var xIdx=maxX-1; xIdx>=0; xIdx--)
if(board[index(xIdx, maxY - 1)] != null)
deservesBonus = false;
if(deservesBonus)
gameCanvas.score += 500;
//Checks for game over
if(deservesBonus || !(floodMoveCheck(0,maxY-1, -1)))
dialog.show("Game Over. Your score is " + gameCanvas.score);
}
//![2]
//only floods up and right, to see if it can find adjacent same-typed tiles
function floodMoveCheck(xIdx, yIdx, type)
{
if(xIdx >= maxX || xIdx < 0 || yIdx >= maxY || yIdx < 0)
return false;
if(board[index(xIdx, yIdx)] == null)
return false;
var myType = board[index(xIdx, yIdx)].type;
if(type == myType)
return true;
return floodMoveCheck(xIdx + 1, yIdx, myType) ||
floodMoveCheck(xIdx, yIdx - 1, board[index(xIdx,yIdx)].type);
}
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