老鼠找起司(1) 副本 | JavaScript 程式專案

{"id":125644,"student_id":37,"content":"var grid = [\n    '*******',\n    '*    C*',\n    '*******',\n];\ninit(grid);\n\n// 右鍵向右移動\nwhen('keyup', 'right', function () {\n    player.x++;\n});\n// 左鍵向左移動\nwhen('keyup', 'left', function () {\n    player.x--;\n });\n\nplayer.reset(3, 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;\n    if(Q[S1] == undefined){\n        Q[S1] = [0,0];\n    }\n    if(Q[S1][0] \u003e Q[S1][1]){\n        player.x ++;\n        A = 0;\n    }else{\n        player.x --;\n        A = 1;\n    }\n    \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, S2,10 )\n        player.reset(3,1)\n    }\n    S2 = player.x;\n    reward(Q, S1,A, S2,10);\n    if(Q[S2] == undefined){\n        Q[S2] = [0,0];\n    }\n    \n    \n    \n    if(grid[player.y][player.x] == \" \"){\n        reward(Q, S1, A, S2, -1)\n    }\n    \n});\n\n// 懲罰獎勵\nfunction reward (Q, S1, A, S2, score) {\n    Q[S1][A] = alpha * Q[S1][A] + (1-alpha) * (score + beta*Math.max(...Q[S2]));\n    \n}\n\n\n\n\n","created_at":"2020-02-09T09:57:55.547+08:00","updated_at":"2020-02-09T11:58:37.627+08:00","name":"老鼠找起司(1) 副本","language":"javascript","screenshot":{"url":"https://cdn0.koding.school/uploads/project/screenshot/125644/2f58b64ff10ebbf9775d959b4ca0a234.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":47,"hashid":"jzmsjpge","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}