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/* This script file handles the game logic */
var maxColumn = 10;
var maxRow = 15;
var maxIndex = maxColumn*maxRow;
var board = new Array(maxIndex);
var component;
//Index function used instead of a 2D array
function index(column,row) {
return column + (row * maxColumn);
}
function startNewGame()
{
//Calculate board size
maxColumn = Math.floor(gameCanvas.width/gameCanvas.blockSize);
maxRow = Math.floor(gameCanvas.height/gameCanvas.blockSize);
maxIndex = maxRow*maxColumn;
//Close dialogs
dialog.forceClose();
//Initialize Board
board = new Array(maxIndex);
gameCanvas.score = 0;
for(var column=0; column<maxColumn; column++){
for(var row=0; row<maxRow; row++){
board[index(column,row)] = null;
createBlock(column,row);
}
}
}
function createBlock(column,row){
if(component==null)
component = createComponent("Block.qml");
// Note that if Block.qml was not a local file, component.isReady would be
// false and we should wait for the component's statusChanged() signal to
// know when the file is downloaded and fully loaded before calling createObject().
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 = column*gameCanvas.blockSize;
dynamicObject.y = row*gameCanvas.blockSize;
dynamicObject.width = gameCanvas.blockSize;
dynamicObject.height = gameCanvas.blockSize;
board[index(column,row)] = dynamicObject;
}else{
print("error loading block component");
print(component.errorsString());
return false;
}
return true;
}
var fillFound;//Set after a floodFill call to the number of blocks found
var floodBoard;//Set to 1 if the floodFill reaches off that node
//![1]
function handleClick(xPos,yPos)
{
var column = Math.floor(xPos/gameCanvas.blockSize);
var row = Math.floor(yPos/gameCanvas.blockSize);
if(column >= maxColumn || column < 0 || row >= maxRow || row < 0)
return;
if(board[index(column, row)] == null)
return;
//If it's a valid block, remove it and all connected (does nothing if it's not connected)
floodFill(column,row, -1);
if(fillFound <= 0)
return;
gameCanvas.score += (fillFound - 1) * (fillFound - 1);
shuffleDown();
victoryCheck();
}
//![1]
function floodFill(column,row,type)
{
if(board[index(column, row)] == null)
return;
var first = false;
if(type == -1){
first = true;
type = board[index(column,row)].type;
//Flood fill initialization
fillFound = 0;
floodBoard = new Array(maxIndex);
}
if(column >= maxColumn || column < 0 || row >= maxRow || row < 0)
return;
if(floodBoard[index(column, row)] == 1 || (!first && type != board[index(column,row)].type))
return;
floodBoard[index(column, row)] = 1;
floodFill(column+1,row,type);
floodFill(column-1,row,type);
floodFill(column,row+1,type);
floodFill(column,row-1,type);
if(first==true && fillFound == 0)
return;//Can't remove single blocks
board[index(column,row)].opacity = 0;
board[index(column,row)] = null;
fillFound += 1;
}
function shuffleDown()
{
//Fall down
for(var column=0; column<maxColumn; column++){
var fallDist = 0;
for(var row=maxRow-1; row>=0; row--){
if(board[index(column,row)] == null){
fallDist += 1;
}else{
if(fallDist > 0){
var obj = board[index(column,row)];
obj.y += fallDist * gameCanvas.blockSize;
board[index(column,row+fallDist)] = obj;
board[index(column,row)] = null;
}
}
}
}
//Fall to the left
var fallDist = 0;
for(var column=0; column<maxColumn; column++){
if(board[index(column, maxRow - 1)] == null){
fallDist += 1;
}else{
if(fallDist > 0){
for(var row=0; row<maxRow; row++){
var obj = board[index(column,row)];
if(obj == null)
continue;
obj.x -= fallDist * gameCanvas.blockSize;
board[index(column-fallDist,row)] = obj;
board[index(column,row)] = null;
}
}
}
}
}
//![2]
function victoryCheck()
{
//Award bonus points if no blocks left
var deservesBonus = true;
for(var column=maxColumn-1; column>=0; column--)
if(board[index(column, maxRow - 1)] != null)
deservesBonus = false;
if(deservesBonus)
gameCanvas.score += 500;
//Check whether game has finished
if(deservesBonus || !(floodMoveCheck(0,maxRow-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 blocks
function floodMoveCheck(column, row, type)
{
if(column >= maxColumn || column < 0 || row >= maxRow || row < 0)
return false;
if(board[index(column, row)] == null)
return false;
var myType = board[index(column, row)].type;
if(type == myType)
return true;
return floodMoveCheck(column + 1, row, myType) ||
floodMoveCheck(column, row - 1, board[index(column,row)].type);
}
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