Add SameGame based advanced tutorial

Could use some cleanup, as I didn't manage to get code snippets working
correctly. Also might benefit from being re-written by a good tutor.

1 files changed, 185 insertions, 0 deletions

diff --git a/examples/declarative/tutorials/samegame/samegame3/samegame.js b/examples/declarative/tutorials/samegame/samegame3/samegame.js
new file mode 100644
index 0000000..16b349d
--- /dev/null
+++ b/examples/declarative/tutorials/samegame/samegame3/samegame.js
@@ -0,0 +1,185 @@
+/* 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(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(xIdx=0; xIdx<maxX; xIdx++){
+        for(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){
+        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
+function handleClick(x,y)
+{
+    xIdx = Math.floor(x/gameCanvas.tileSize);
+    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();
+}
+
+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(xIdx=0; xIdx<maxX; xIdx++){
+        fallDist = 0;
+        for(yIdx=maxY-1; yIdx>=0; yIdx--){
+            if(board[index(xIdx,yIdx)] == null){
+                fallDist += 1;
+            }else{
+                if(fallDist > 0){
+                    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
+    fallDist = 0;
+    for(xIdx=0; xIdx<maxX; xIdx++){
+        if(board[index(xIdx, maxY - 1)] == null){
+            fallDist += 1;
+        }else{
+            if(fallDist > 0){
+                for(yIdx=0; yIdx<maxY; yIdx++){
+                    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;
+                }
+            }
+        }
+    }
+}
+
+function victoryCheck()
+{
+    //awards bonuses for no tiles left
+    deservesBonus = true;
+    for(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);
+}
+
+//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;
+    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);
+}