老鼠找起司_Day2_預設版副本 | JavaScript 程式專案

{"id":350199,"student_id":3302,"content":"// 二維迷宮\nvar grid = [\n    '******',\n    '*    *',\n    '* ** *',\n    '* *C *',\n    '*    *',\n    '******',\n];\n\ngrid = randomGrid(20, 15, 0.2)\n\ninit(grid); // 初始化畫面\n\nwhen('keyup', 'up', function () {\n    player.y--;\n});\nwhen('keyup', 'down', function () {\n    player.y++;\n});\nwhen('keyup', 'left', function () {\n    player.x--;\n});\nwhen('keyup', 'right', function () {\n    player.x++;\n});\n\n// 按住空白按鍵更新老鼠\nwhen('keydown', 'space', update);\n\nplayer.x = 1;\nplayer.y = 1;\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 = 0.2; // 學習速率\nvar beta = 0.5; // 衰減值\n\nforever(function () {\n    S1 = player.x + ':' + player.y;\n    drawText(Q[S1], 10, 10, 'white')\n});\n\n// 更新老鼠\nfunction update () {\n    S1 = player.x + ':' + player.y;\n    if (Q[S1] === undefined) {\n        Q[S1] = [0,0,0,0]\n    }\n    \n    var max = Math.max(Q[S1][0],Q[S1][1],Q[S1][2],Q[S1][3])\n    var A = Q[S1].indexOf(max)\n    if (A == 0) player.x++; \n    if (A == 1) player.x--; \n    if (A == 2) player.y++; \n    if (A == 3) player.y--; \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] == 'C'){\n        reword (Q, S1, A, S2, 10000)\n        player.x = 1;\n        player.y = 1;\n    }\n    if (grid[player.y][player.x] == '*'){\n        reword (Q, S1, A, S2, -100)\n        player.x = 1;\n        player.y = 1;\n    }\n    if (grid[player.y][player.x] == ' '){\n        reword (Q, S1, A, S2, -1)\n    \n    }\n};\n\n// Q-learning 公式\nfunction reword (Q, S1, A, S2, R) {\n    var mr = Math.max(Q[S2][0],Q[S2][1],Q[S2][2],Q[S2][3]);\n    Q[S1][A] = (R + mr * beta) * alpha + Q[S1][A] * (1 - alpha);\n\n}","created_at":"2022-02-26T19:02:35.389+08:00","updated_at":"2022-02-26T20:55:34.186+08:00","name":"老鼠找起司_Day2_預設版 副本","language":"javascript","screenshot":{"url":"https://cdn7.koding.school/uploads/project/screenshot/350199/b230fa3bcc0fafe3f75ee57f07ce202f.jpg"},"parent_id":303224,"plugin":"setBackdrop(\"#fff\");\nvar 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.size = 4;\n                pen.color = '#999'\n                pen.fillColor = (grid[y][x] == '*' ? '#111' : '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] = '';s\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":154,"hashid":"qmds8yq3w","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}