老鼠找起司(2) 副本 | JavaScript 程式專案

{"id":66963,"student_id":119,"content":"var grid = [\n    '****************',\n    '* *C       *   *',\n    '* ***  ** *  * *',\n    '*    * *    *  *',\n    '*** ** * * *** *',\n    '* *   *     * **',\n    '*  ** * * **  **',\n    '**  *   ** **  *',\n    '*     *   *  * *',\n    '* * ***** ** * *',\n    '* *     *      *',\n    '****************',\n];\ninit(grid);\n\nplayer.reset(1, 1); // 初始化老鼠位置\n\nvar Q = {}; //老鼠的大腦\nvar S1; //上一次的狀態(位置)\nvar S2; //當前的狀態(位置)\nvar A; //上一次的動作(移動方向)\nvar alpha = 0.8; // 學習速率\nvar beta = 0.5; // 衰減值\n\n\nforever(function(){\n    S1=player.x+\":\"+player.y;\n    if (Q[S1]===undefined){\n      Q[S1] = [0,0,0,0];\n    }\n    if(Q[S1].indexOf(Math.max(...Q[S1]))==0){\n        player.y--;\n        A = 0;\n    }else if(Q[S1].indexOf(Math.max(...Q[S1]))==1){\n        player.x++;\n        A = 1;\n    }else if(Q[S1].indexOf(Math.max(...Q[S1]))==2){\n        player.x--;\n        A = 2;\n    }else{\n        player.y++;\n        A = 3;\n    }\n    S2=player.x+\":\"+player.y;\n    if (Q[S2]===undefined){\n      Q[S2] = [0,0,0,0];\n    }\n    \n    if (grid[player.y][player.x] == '*') {\n        reword(Q,S1,A,S2,-100);\n        player.reset(1, 1)}\n    if (grid[player.y][player.x] == 'C') {\n        reword(Q,S1,A,S2,10);\n        player.reset(1, 1)}\n        if (grid[player.y][player.x] == ' ') {\n        reword(Q,S1,A,S2,-1)}\n});\n\n// 懲罰獎勵\nfunction reword (Q, S1, A, S2, score) {\nQ[S1][A]=alpha*Q[S1][A]+(1-alpha)*(score+beta*Math.max(...Q[S2]));\n}","created_at":"2019-05-11T10:57:07.095+08:00","updated_at":"2019-11-10T07:09:36.752+08:00","name":"老鼠找起司(2) 副本","language":"javascript","screenshot":{"url":"https://cdn1.koding.school/uploads/project/screenshot/66963/397f63388c9c2dda0e0744673eb5fa3e.jpg"},"parent_id":65017,"plugin":"var rat = createSprite('mouse.png');;\nvar cheese = createSprite('cheese.png');\nvar W;\nvar H;\nvar width = 40;\n\nfunction init (grid) {\n\n    H = grid.length;\n    W = grid[0].length;\n\n    for (var y = 0; y \u003c H; y++) {\n        for (var x = 0; x \u003c W; x++) {\n            if (grid[y][x] == 'C') {\n                cheese.moveTo(x*width + width/2, y*width + width/2);\n            }\n        }\n    }\n\n    forever(function() {\n        for (var y = 0; y \u003c H; y++) {\n            for (var x = 0; x \u003c W; x++) {\n                pen.fillColor = (grid[y][x] == '*' ? 'black' : 'white')\n                pen.drawRect(x*width, y*width, width, width);\n            }\n        }\n    });\n}\n\nfunction randomGrid (col, row, rate) {\n    var col = col \u003c 16 ? col : 16;\n    var row = row \u003c 12 ? row : 12;\n    var grid = [];\n    for (var y = 0; y \u003c row - 2; y++) {\n        grid[y] = '';\n        for (var x = 0; x \u003c col - 2 ; x++) {\n            if (x == col - 3 \u0026\u0026 y == row - 3) grid[y] += 'C';\n            else grid[y] += Math.random() \u003c rate ? '*' : ' ';\n        }\n        grid[y] = '*' + grid[y] + '*';\n    }\n    var s = Array(col).fill('*').join('');\n    grid.push(s);\n    grid.unshift(s);\n    return grid;\n}\n\nvar player = {\n    x: 1,\n    y: 1,\n    reset: function (x, y) {\n        this.x = x;\n        this.y = y;\n    }\n}\n\nforever(function () {\n    rat.moveTo(player.x*width + width/2, player.y*width + width/2);\n})\n\n","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":128,"hashid":"jzmsnz5v","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}