Html5 小游戏 俄罗斯方块

//create canvas
function createCanvas(){
    myCanvas=document.createElement("canvas");
    myCanvas.width=TETRIS_COLS*CELL_SIZE;
    myCanvas.height=TETRIS_ROWS*CELL_SIZE;
    //绘制背景
    canvasCtx=myCanvas.getContext("2d");
    canvasCtx.beginPath();
    //TETRIS_COS
    for(let i=1; i<TETRIS_COLS; i++){
        canvasCtx.moveTo(i*CELL_SIZE, 0);
        canvasCtx.lineTo(i*CELL_SIZE, myCanvas.height);
    }
    for(let i=1; i<TETRIS_ROWS; i++){
        canvasCtx.moveTo(0, i*CELL_SIZE);
        canvasCtx.lineTo(myCanvas.width, i*CELL_SIZE);
    }
    canvasCtx.closePath();
    canvasCtx.strokeStyle="#b4a79d";
    canvasCtx.lineWidth=0.6;
    canvasCtx.stroke();
    //第一行,最后一行,第一列，最后一列粗一点。
    canvasCtx.beginPath();
    canvasCtx.moveTo(0, 0);
    canvasCtx.lineTo(myCanvas.width, 0);
    canvasCtx.moveTo(0, myCanvas.height);
    canvasCtx.lineTo(myCanvas.width, myCanvas.height);
    canvasCtx.moveTo(0, 0);
    canvasCtx.lineTo(0, myCanvas.height);
    canvasCtx.moveTo(myCanvas.width, 0);
    canvasCtx.lineTo(myCanvas.width, myCanvas.height);
    canvasCtx.closePath();
    canvasCtx.strokeStyle="#b4a79d";
    canvasCtx.lineWidth=4;
    canvasCtx.stroke();
    //设置绘制block时的style
    canvasCtx.fillStyle="#201a14";
}

 1 function changeWidthAndHeight(w, h){
 2     //通过jquery设置css
 3     h+=$("ui_bg").css("height")+$("ui_bg").css("margin-rop")+$("ui_bg").css("margin-bottom")+$("ui_bg").css("padding-top")+$("ui_bg").css("padding-bottom");
 4     $(".bg").css({
 5         "width":w,
 6         "height":h,
 7         "top":0, "bottom":0, "right":0, "left":0,
 8         "margin":"auto"
 9     });
10 }

 1 //draw blocks
 2 function drawBlocks(){
 3     //清空地图
 4     for(let i=0; i<TETRIS_ROWS;i++){
 5         for(let j=0;j<TETRIS_COLS;j++)
 6             canvasCtx.clearRect(j*CELL_SIZE+1, i*CELL_SIZE+1, CELL_SIZE-2, CELL_SIZE-2);
 7     }
 8     //绘制地图
 9     for(let i=0; i<TETRIS_ROWS;i++){
10         for(let j=0;j<TETRIS_COLS;j++){
11             if(tetris_status[i][j]!=NO_BLOCK)
12                 canvasCtx.fillRect(j*CELL_SIZE+1, i*CELL_SIZE+1, CELL_SIZE-2, CELL_SIZE-2);//中间留点缝隙
13         }
14     }
15     //绘制currentFall
16     for(let i=0;i<currentFall.length;i++)
17         canvasCtx.fillRect(currentFall[i].x*CELL_SIZE+1, currentFall[i].y*CELL_SIZE+1, CELL_SIZE-2,CELL_SIZE-2);
18 }

 1 function rotate(){
 2     // 定义记录能否旋转的旗标
 3     var canRotate = true;
 4     for (var i = 0 ; i < currentFall.length ; i++)
 5     {
 6         var preX = currentFall[i].x;
 7         var preY = currentFall[i].y;
 8         // 始终以第三个方块作为旋转的中心,
 9         // i == 2时，说明是旋转的中心
10         if(i != 2)
11         {
12             // 计算方块旋转后的x、y坐标
13             var afterRotateX = currentFall[2].x + preY - currentFall[2].y;
14             var afterRotateY = currentFall[2].y + currentFall[2].x - preX;
15             // 如果旋转后所在位置已有方块，表明不能旋转
16             if(tetris_status[afterRotateY][afterRotateX + 1] != NO_BLOCK)
17             {
18                 canRotate = false;
19                 break;
20             }
21             // 如果旋转后的坐标已经超出了最左边边界
22             if(afterRotateX < 0 || tetris_status[afterRotateY - 1][afterRotateX] != NO_BLOCK)
23             {
24                 moveRight();
25                 afterRotateX = currentFall[2].x + preY - currentFall[2].y;
26                 afterRotateY = currentFall[2].y + currentFall[2].x - preX;
27                 break;
28             }
29             if(afterRotateX < 0 || tetris_status[afterRotateY-1][afterRotateX] != NO_BLOCK)
30             {
31                 moveRight();
32                 break;
33             }
34             // 如果旋转后的坐标已经超出了最右边边界
35             if(afterRotateX >= TETRIS_COLS - 1 || 
36                 tetris_status[afterRotateY][afterRotateX+1] != NO_BLOCK)
37             {
38                 moveLeft();
39                 afterRotateX = currentFall[2].x + preY - currentFall[2].y;
40                 afterRotateY = currentFall[2].y + currentFall[2].x - preX;
41                 break;
42             }
43             if(afterRotateX >= TETRIS_COLS - 1 || 
44                 tetris_status[afterRotateY][afterRotateX+1] != NO_BLOCK)
45             {
46                 moveLeft();
47                 break;
48             }
49         }
50     }
51     if(canRotate){
52         for (var i = 0 ; i < currentFall.length ; i++){
53             var preX = currentFall[i].x;
54             var preY = currentFall[i].y;
55             if(i != 2){
56                 currentFall[i].x = currentFall[2].x + 
57                     preY - currentFall[2].y;
58                 currentFall[i].y = currentFall[2].y + 
59                     currentFall[2].x - preX;
60             }
61         }
62         localStorage.setItem("currentFall", JSON.stringify(currentFall));
63     }
64 }

 1 //按下 下 或 interval到了
 2 function next(){
 3     if(moveDown()){
 4         //记录block
 5         for(let i=0;i<currentFall.length;i++)
 6             tetris_status[currentFall[i].y][currentFall[i].x]=HAVE_BLOCK;
 7         //判断有没有满行的
 8         for(let j=0;j<currentFall.length;j++){
 9             for(let i=0;i<TETRIS_COLS; i++){
10                 if(tetris_status[currentFall[j].y][i]==NO_BLOCK)
11                     break;
12                 //最后一行满了
13                 if(i==TETRIS_COLS-1){
14                     //消除最后一行
15                     for(let i=currentFall[j].y; i>0;i--){
16                         for(let j=0;j<TETRIS_COLS;j++)
17                             tetris_status[i][j]=tetris_status[i-1][j];
18                     }
19                     //分数增加
20                     curScore+=5;
21                     localStorage.setItem("curScore", curScore);
22                     if(curScore>maxScore){
23                         //超越最高分
24                         maxScore=curScore;
25                         localStorage.setItem("maxScore", maxScore);
26                     }
27                     //加速
28                     curSpeed+=0.1;
29                     localStorage.setItem("curSpeed", curSpeed);
30                     //ui输出
31                     curScoreEle.innerHTML=""+curScore;
32                     maxScoreEle.innerHTML=""+maxScore;
33                     curSpeedEle.innerHTML=curSpeed.toFixed(1);//保留两位小数
34                     clearInterval(timer);
35                     timer=setInterval(function(){
36                         next();
37                     }, 500/curSpeed);
38                 }
39             }
40         }
41         //判断是否触顶
42         for(let i=0;i<currentFall.length;i++){
43             if(currentFall[i].y==0){
44                 gameEnd();
45                 return;
46             }
47         }
48         localStorage.setItem("tetris_status", JSON.stringify(tetris_status));
49         //新的block
50         createBlock();
51         localStorage.setItem("currentFall", JSON.stringify(currentFall));
52     }
53     drawBlocks();
54 }
55 
56 //右移
57 function moveRight(){
58     for(let i=0;i<currentFall.length;i++){
59         if(currentFall[i].x+1>=TETRIS_ROWS || tetris_status[currentFall[i].y][currentFall[i].x+1]!=NO_BLOCK)
60             return;
61     }
62     for(let i=0;i<currentFall.length;i++)
63         currentFall[i].x++;
64     localStorage.setItem("currentFall", JSON.stringify(currentFall));
65     return;
66 }
67 //左移
68 function moveLeft(){
69     for(let i=0;i<currentFall.length;i++){
70         if(currentFall[i].x-1<0 || tetris_status[currentFall[i].y][currentFall[i].x-1]!=NO_BLOCK)
71             return;
72     }
73     for(let i=0;i<currentFall.length;i++)
74         currentFall[i].x--;
75     localStorage.setItem("currentFall", JSON.stringify(currentFall));
76     return;
77 }
78 //judge can move down and if arrive at end return 1, if touch other blocks return 2, else, return 0
79 function moveDown(){
80     for(let i=0;i<currentFall.length;i++){
81         if(currentFall[i].y>=TETRIS_ROWS-1 || tetris_status[currentFall[i].y+1][currentFall[i].x]!=NO_BLOCK)
82             return true;
83     }
84 
85     for(let i=0;i<currentFall.length;i++)
86         currentFall[i].y+=1;
87     return false;
88 }

 1 function gameKeyEvent(evt){
 2     switch(evt.keyCode){
 3         //向下
 4         case 40://↓
 5         case 83://S
 6             next();
 7             drawBlocks();
 8             break;
 9         //向左
10         case 37://←
11         case 65://A
12             moveLeft();
13             drawBlocks();
14             break;
15         //向右
16         case 39://→
17         case 68://D
18             moveRight();
19             drawBlocks();
20             break;
21         //旋转
22         case 38://↑
23         case 87://W
24             rotate();
25             drawBlocks();
26             break;
27     }
28 }

function initAnim() {
    initStages();
    initText();
    initCircles();
    //在stage下方添加文字——按任意键重新开始游戏.
    tmp = new createjs.Text("t", "12px 'Source Sans Pro'", "#54555C");
    tmp.textAlign = 'center';
    tmp.x = 180;
    tmp.y=350;
    tmp.text = "按任意键重新开始游戏";
    stage.addChild(tmp);
    animate();
}

 1 function initCircles() {
 2     circles = [];
 3     var p=[];
 4     var count=0;
 5     for(let i=0; i<TETRIS_ROWS;i++)
 6         for(let j=0;j<TETRIS_COLS;j++)
 7             if(tetris_status[i][j]!=NO_BLOCK)
 8                 p.push({'x':j*CELL_SIZE+2, 'y':i*CELL_SIZE+2, 'w':CELL_SIZE-3, 'h':CELL_SIZE-4});
 9     for(var i=0; i<250; i++) {
10         var circle = new createjs.Shape();
11         var r = 7;
12         //x和y范围限定在黑色block内
13         var x = p[count]['x']+p[count]['w']*Math.random();
14         var y = p[count]['y']+p[count]['h']*Math.random();
15         count++;
16         if(count>=p.length)
17             count=0;
18         var color = colors[Math.floor(i%colors.length)];
19         var alpha = 0.2 + Math.random()*0.5;
20         circle.alpha = alpha;
21         circle.radius = r;
22         circle.graphics.beginFill(color).drawCircle(0, 0, r);
23         circle.x = x;
24         circle.y = y;
25         circles.push(circle);
26         stage.addChild(circle);
27         circle.movement = 'float';
28         tweenCircle(circle);
29     }
30 }

 1 function createText(t) {
 2     curText=t;
 3     var fontSize = 500/(t.length);
 4     if (fontSize > 80) fontSize = 80;
 5     text.text = t;
 6     text.font = "900 "+fontSize+"px 'Source Sans Pro'";
 7     text.textAlign = 'center';
 8     text.x = TETRIS_COLS*CELL_SIZE/2;
 9     text.y = 0;
10     textStage.addChild(text);
11     textStage.update();
12 
13     var ctx = document.getElementById('text').getContext('2d');
14     var pix = ctx.getImageData(0,0,600,200).data;
15     textPixels = [];
16     for (var i = pix.length; i >= 0; i -= 4) {
17         if (pix[i] != 0) {
18             var x = (i / 4) % 600;
19             var y = Math.floor(Math.floor(i/600)/4);
20             if((x && x%8 == 0) && (y && y%8 == 0)) textPixels.push({x: x, y: y});
21         }
22     }
23 
24     formText();
25     textStage.clear();//清楚text的显示
26 }

 1 function formText() {
 2     for(var i= 0, l=textPixels.length; i<l; i++) {
 3         circles[i].originX = offsetX + textPixels[i].x;
 4         circles[i].originY = offsetY + textPixels[i].y;
 5         tweenCircle(circles[i], 'in');
 6     }
 7     textFormed = true;
 8     if(textPixels.length < circles.length) {
 9         for(var j = textPixels.length; j<circles.length; j++) {
10             circles[j].tween = TweenLite.to(circles[j], 0.4, {alpha: 0.1});
11         }
12     }
13 }