迷宮產生器 | JavaScript Programming Project

{"id":14005,"student_id":10,"content":"var SIZE = 16; // 公因數：10, 16, 20, 32, 40, 64, 80, 128...\nvar W = 640/SIZE;\nvar H = 480/SIZE;\nvar grid = [];\nvar groups = [];\n\nfor (var x=0; x\u003cW; x++) {\n    grid[x] = [];\n    for (var y=0; y\u003cH; y++) {\n        grid[x][y] = '1234';\n        groups.push([y*W + x]);\n    }\n}\n\nfunction merge () {\n\n    if (groups.length \u003c= 1) return;\n\n    var rand = Math.floor(Math.random()*groups.length);\n    var group1 = groups.splice(rand, 1)[0];\n    var group2 = [];\n    var a, b, direction;\n\n    while (true) {\n        a = group1[Math.floor(Math.random()*group1.length)];\n        b = direction = undefined;\n\n        direction = Math.ceil(Math.random()*4);\n\n        if (direction == 1) b = a - W;\n        if (direction == 2) b = a + 1;\n        if (direction == 3) b = a + W;\n        if (direction == 4) b = a - 1;\n\n        if (group1.includes(b)) continue;\n        if (b \u003c 0 || b \u003e W*H-1) continue;\n        if (a%W == 0 \u0026\u0026 direction == 4) continue;\n        if (a%W == W-1 \u0026\u0026 direction == 2) continue;\n\n        var cell1 = grid[a%W][Math.floor(a/W)];\n        var cell2 = grid[b%W][Math.floor(b/W)];\n        grid[a%W][Math.floor(a/W)] = cell1.replace(direction, '');\n        grid[b%W][Math.floor(b/W)] = cell2.replace(direction \u003e 2 ? direction - 2 : direction + 2, '');\n\n        break;\n    }\n\n    for (var i=0; i\u003cgroups.length; i++) {\n        if (groups[i].includes(b)) {\n            var index = groups.indexOf(groups[i]);\n            group2 = groups.splice(index, 1)[0];\n        }\n    }\n    groups.push(group1.concat(group2));\n}\n\nforever(function(){\n    for (var x=0; x\u003cgrid.length; x++) {\n        for (var y=0; y\u003cgrid[x].length; y++) {\n            var cell = grid[x][y];\n            if (cell.includes(1)) pen.drawRect(x*SIZE, y*SIZE, SIZE, 2);\n            if (cell.includes(2)) pen.drawRect(x*SIZE + SIZE - 2, y*SIZE, 2, SIZE);\n            if (cell.includes(3)) pen.drawRect(x*SIZE, y*SIZE + SIZE - 2, SIZE, 2);\n            if (cell.includes(4)) pen.drawRect(x*SIZE, y*SIZE, 2, SIZE);\n        }\n    }\n});\n\nforever(merge);","created_at":"2017-03-01T20:52:04.729+08:00","updated_at":"2019-11-10T21:47:08.494+08:00","name":"迷宮產生器","language":"javascript","screenshot":{"url":"/uploads/project/screenshot/14005/05085366c0e388d48c6c31d0f0117217.jpg"},"parent_id":2,"plugin":"","description":null,"note":null,"status":"public","like_student_ids":[1407,1934],"is_featured":true,"views":1360,"hashid":"gk4skyvz","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}