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| <html>
<head>
<title></title>
<script>
const PUZZLE_DIFFICULTY = 4;
const PUZZLE_HOVER_TINT = '#009900';
var _stage;
var _canvas;
var _img;
var _pieces;
var _puzzleWidth;
var _puzzleHeight;
var _pieceWidth;
var _pieceHeight;
var _currentPiece;
var _currentDropPiece;
var _mouse;
function init(){
_img = new Image();
_img.addEventListener('load',onImage,false);
_img.src = "masc.gif";
}
function onImage(e){
_pieceWidth = Math.floor(_img.width / PUZZLE_DIFFICULTY)
_pieceHeight = Math.floor(_img.height / PUZZLE_DIFFICULTY)
_puzzleWidth = _pieceWidth * PUZZLE_DIFFICULTY;
_puzzleHeight = _pieceHeight * PUZZLE_DIFFICULTY;
setCanvas();
initPuzzle();
}
function setCanvas(){
_canvas = document.getElementById('canvas');
_stage = _canvas.getContext('2d');
_canvas.width = _puzzleWidth;
_canvas.height = _puzzleHeight;
}
function initPuzzle(){
_pieces = [];
_mouse = {x:0,y:0};
_currentPiece = null;
_currentDropPiece = null;
_stage.drawImage(_img, 0, 0, _puzzleWidth, _puzzleHeight, 0, 0, _puzzleWidth, _puzzleHeight);
createTitle("Click to Start Puzzle");
buildPieces();
}
function createTitle(msg){
_stage.fillStyle = "red";
_stage.globalAlpha = .4;
_stage.fillRect(280,_puzzleHeight - 40,_puzzleWidth - 200,40);
_stage.globalAlpha = 1;
_stage.textAlign = "center";
_stage.textBaseline = "middle";
_stage.font = "20px Arial";
_stage.fillText(msg,_puzzleWidth / 2,_puzzleHeight - 10);
}
function buildPieces(){
var i;
var piece;
var xPos = 0;
var yPos = 0;
for(i = 0;i < PUZZLE_DIFFICULTY * PUZZLE_DIFFICULTY;i++){
piece = {};
piece.sx = xPos;
piece.sy = yPos;
_pieces.push(piece);
xPos += _pieceWidth;
if(xPos >= _puzzleWidth){
xPos = 0;
yPos += _pieceHeight;
}
}
document.onmousedown = shufflePuzzle;
}
function shufflePuzzle(){
_pieces = shuffleArray(_pieces);
_stage.clearRect(0,0,_puzzleWidth,_puzzleHeight);
var i;
var piece;
var xPos = 0;
var yPos = 0;
for(i = 0;i < _pieces.length;i++){
piece = _pieces[i];
piece.xPos = xPos;
piece.yPos = yPos;
_stage.drawImage(_img, piece.sx, piece.sy, _pieceWidth, _pieceHeight, xPos, yPos, _pieceWidth, _pieceHeight);
_stage.strokeRect(xPos, yPos, _pieceWidth,_pieceHeight);
xPos += _pieceWidth;
if(xPos >= _puzzleWidth){
xPos = 0;
yPos += _pieceHeight;
}
}
document.onmousedown = onPuzzleClick;
}
function onPuzzleClick(e){
if(e.layerX || e.layerX == 0){
_mouse.x = e.layerX - _canvas.offsetLeft;
_mouse.y = e.layerY - _canvas.offsetTop;
}
else if(e.offsetX || e.offsetX == 0){
_mouse.x = e.offsetX - _canvas.offsetLeft;
_mouse.y = e.offsetY - _canvas.offsetTop;
}
_currentPiece = checkPieceClicked();
if(_currentPiece != null){
_stage.clearRect(_currentPiece.xPos,_currentPiece.yPos,_pieceWidth,_pieceHeight);
_stage.save();
_stage.globalAlpha = .9;
_stage.drawImage(_img, _currentPiece.sx, _currentPiece.sy, _pieceWidth, _pieceHeight, _mouse.x - (_pieceWidth / 2), _mouse.y - (_pieceHeight / 2), _pieceWidth, _pieceHeight);
_stage.restore();
document.onmousemove = updatePuzzle;
document.onmouseup = pieceDropped;
}
}
function checkPieceClicked(){
var i;
var piece;
for(i = 0;i < _pieces.length;i++){
piece = _pieces[i];
if(_mouse.x < piece.xPos || _mouse.x > (piece.xPos + _pieceWidth) || _mouse.y < piece.yPos || _mouse.y > (piece.yPos + _pieceHeight)){
//PIECE NOT HIT
}
else{
return piece;
}
}
return null;
}
function updatePuzzle(e){
_currentDropPiece = null;
if(e.layerX || e.layerX == 0){
_mouse.x = e.layerX - _canvas.offsetLeft;
_mouse.y = e.layerY - _canvas.offsetTop;
}
else if(e.offsetX || e.offsetX == 0){
_mouse.x = e.offsetX - _canvas.offsetLeft;
_mouse.y = e.offsetY - _canvas.offsetTop;
}
_stage.clearRect(0,0,_puzzleWidth,_puzzleHeight);
var i;
var piece;
for(i = 0;i < _pieces.length;i++){
piece = _pieces[i];
if(piece == _currentPiece){
continue;
}
_stage.drawImage(_img, piece.sx, piece.sy, _pieceWidth, _pieceHeight, piece.xPos, piece.yPos, _pieceWidth, _pieceHeight);
_stage.strokeRect(piece.xPos, piece.yPos, _pieceWidth,_pieceHeight);
if(_currentDropPiece == null){
if(_mouse.x < piece.xPos || _mouse.x > (piece.xPos + _pieceWidth) || _mouse.y < piece.yPos || _mouse.y > (piece.yPos + _pieceHeight)){
//NOT OVER
}
else{
_currentDropPiece = piece;
_stage.save();
_stage.globalAlpha = .4;
_stage.fillStyle = PUZZLE_HOVER_TINT;
_stage.fillRect(_currentDropPiece.xPos,_currentDropPiece.yPos,_pieceWidth, _pieceHeight);
_stage.restore();
}
}
}
_stage.save();
_stage.globalAlpha = .6;
_stage.drawImage(_img, _currentPiece.sx, _currentPiece.sy, _pieceWidth, _pieceHeight, _mouse.x - (_pieceWidth / 2), _mouse.y - (_pieceHeight / 2), _pieceWidth, _pieceHeight);
_stage.restore();
_stage.strokeRect( _mouse.x - (_pieceWidth / 2), _mouse.y - (_pieceHeight / 2), _pieceWidth,_pieceHeight);
}
function pieceDropped(e){
document.onmousemove = null;
document.onmouseup = null;
if(_currentDropPiece != null){
var tmp = {xPos:_currentPiece.xPos,yPos:_currentPiece.yPos};
_currentPiece.xPos = _currentDropPiece.xPos;
_currentPiece.yPos = _currentDropPiece.yPos;
_currentDropPiece.xPos = tmp.xPos;
_currentDropPiece.yPos = tmp.yPos;
}
resetPuzzleAndCheckWin();
}
function resetPuzzleAndCheckWin(){
_stage.clearRect(0,0,_puzzleWidth,_puzzleHeight);
var gameWin = true;
var i;
var piece;
for(i = 0;i < _pieces.length;i++){
piece = _pieces[i];
_stage.drawImage(_img, piece.sx, piece.sy, _pieceWidth, _pieceHeight, piece.xPos, piece.yPos, _pieceWidth, _pieceHeight);
_stage.strokeRect(piece.xPos, piece.yPos, _pieceWidth,_pieceHeight);
if(piece.xPos != piece.sx || piece.yPos != piece.sy){
gameWin = false;
}
}
if(gameWin){
setTimeout(gameOver,500);
_img.src = "masc.jpg";
alert('Mais dis donc, vous savez tailler!');
}
}
function gameOver(){
document.onmousedown = null;
document.onmousemove = null;
document.onmouseup = null;
initPuzzle();
}
function shuffleArray(o){
for(var j, x, i = o.length; i; j = parseInt(Math.random() * i), x = o[--i], o[i] = o[j], o[j] = x);
return o;
}
</script>
</head>
<body onload="init();" >
<canvas id="canvas"></canvas>
</body>
</html> |
Aide pour plusieurs balises <canvas> dans une page web
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