老鼠找起司(1) 副本 | JavaScript 程式專案

{"id":66534,"student_id":1440,"content":"var grid = [\n    '****************',\n    '*              *',\n    '*              *',\n    '*              *',\n    '*              *',\n    '*           C  *',\n    '*              *',\n    '*              *',\n    '*              *',\n    '*              *',\n    '*              *',\n    '****************',\n];\n\ninit(grid);\n\nplayer.reset(3, 1); // 初始化老鼠位置\n\nvar Q = {}; //老鼠的大腦\nvar S1 = player.x; //上一次的狀態(位置)\nvar S2 = player.x; //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])Q[S1] = [0, 0, 0, 0]\n    \n    A=Q[S1].indexOf(Math.max(Q[S1][0], Q[S1][1], Q[S1][2], Q[S1][3]))\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])Q[S2] = [0, 0, 0, 0]\n\n    reward (Q, S1, A, S2, -1)\n\n    if (grid[player.y][player.x] == \"*\") {\n        reward (Q, S1, A, S2, -100)\n        player.reset(3, 1)\n    }\n    if (grid[player.y][player.x] == \"C\") {\n        reward (Q, S1, A, S2, 100)\n        player.reset(3, 1)\n    }\n    if (grid[player.y][player.x] == \" \") {\n        reward (Q, S1, A, S2, -1)\n    }\n})\n\n// 懲罰獎勵\nfunction reward (Q, S1, A, S2, score) {\n    Q[S1][A] += (1-alpha)*Q[S1][A]+alpha*(score+beta*Math.max(Q[S2][0], Q[S2][1], Q[S2][2], Q[S2][3]))\n}","created_at":"2019-05-08T23:08:56.599+08:00","updated_at":"2020-11-24T06:13:06.484+08:00","name":"老鼠找起司(1) 副本","language":"javascript","screenshot":{"url":"https://cdn3.koding.school/uploads/project/screenshot/66534/941b38da1ce88c46271b30dd718d25a3.jpg"},"parent_id":65016,"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":125,"hashid":"npms54pr","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}