{"id":66489,"student_id":1981,"content":"var grid = [\n '*******',\n '* C*',\n '*******',\n];\ninit(grid);\n\n// when('keyup', 'right', function () {\n// //當按下向右鍵\n// player.x++; //老鼠往右邊一格\n// console.log(grid[player.y][player.x]);\n// })\n// when('keyup', 'left', function () {\n// player.x--;\n// console.log(grid[player.y][player.x]);\n// })\n\nplayer.reset(3, 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 = 0.8;\nvar beta = 0.5;\n\nforever(function() {\n S1=player.x;\n \n if (Q[S1] == undefined) {\n //如果\n Q[S1] = [0, 0];\n }\n \n \n if (Q[S1][0] \u003e Q[S1][1]) {\n player.x++; //往右\n A = 0; //移動方向\n } else {\n player.x--; //往左\n A = 1;\n }\n S2=player.x;\n if (Q[S2] == undefined) {\n Q[S2] = [0, 0];\n }\n if (grid[player.y][player.x] == '*') {\n //如果碰到牆壁\n reword(Q, S1, A, S2, -100); //逞罰負一百分\n player.reset(3, 1); //回到初始位置\n }\n if (grid[player.y][player.x] == 'C') {\n //如果碰到起司\n reword(Q, S1, A, S2, 10); //獎勵加十分\n player.reset(3, 1); //回到初始位置\n }\n if (grid[player.y][player.x] == ' ') {\n //如果是空格\n reword(Q, S1, A, S2, -1); //逞罰負一分\n player.reset(3, 1); //回到初始位置\n }\n \n});\n\n \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}","created_at":"2019-05-07T13:54:00.335+08:00","updated_at":"2020-05-16T15:14:40.982+08:00","name":"老鼠找起司(1) 副本","language":"javascript","screenshot":{"url":"https://cdn5.koding.school/uploads/project/screenshot/66489/2f58b64ff10ebbf9775d959b4ca0a234.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":54,"hashid":"9ygsg5y5","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}
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