{"id":66935,"student_id":243,"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;//上一次的狀態\n \n // if(grid[[player.y]][player.x]=='C' ||grid[player.y][player.x]=='*'){\n // player.reset(3,1);\n \n // }\n if(Q[S1]==undefined){\n Q[S1]=[0,0];\n \n }\n if(Q[S1][0]\u003eQ[S1][1]){\n player.x++;\n A=0;\n \n }else{\n A=1;\n player.x--;\n \n }\n S2=player.x;//儲存當次狀態\n if (Q[S2]==undefined){\n Q[S2]=[0,0];\n }\n if(grid[player.y][player.x]=='*'){//撞到牆壁懲罰-100\n reword(Q,S1,A,S2,-100);\n player.reset(2,1);\n }\n \n if(grid[[player.y]][player.x]=='C'){//找到起司加10\n reword(Q,S1,A,S2,+10);\n player.reset(2,1);\n }\n if(grid[player.y][player.x] == ' '){//浪費步數懲罰-1\n reword(Q, S1, A, S2, -1);\n }\n \n\n\n \n});\n// 懲罰獎勵\nfunction reword (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}","created_at":"2019-05-11T10:37:47.057+08:00","updated_at":"2019-10-07T18:28:02.947+08:00","name":"老鼠找起司(1) 副本","language":"javascript","screenshot":{"url":"https://cdn2.koding.school/uploads/project/screenshot/66935/89edcce60b8890776f43b51e69f48ea4.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":59,"hashid":"9ygsgryv","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}
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