謝爾賓斯基三角形副本 | JavaScript 程式專案

{"id":70573,"student_id":1885,"content":"stopRendering();\n\ndrawBackdrop(\"white\");\npen.fillColor = \"yellow\";\n\nvar firstTriangle = {\n    x1: 320,\n    y1: 0,\n    x2: 0,\n    y2: 480,\n    x3: 640,\n    y3: 480\n};\nvar triangles = [\n    [firstTriangle],\n];\n\nvar depth = 8;\n\nfor (var i = 0; i \u003c depth; i++) {\n    var newTriangles = [];\n    for (var j = 0; j \u003c triangles[i].length; j++) {\n        var t = triangles[i][j];\n        var topTriangle = {\n            x1: t.x1,\n            y1: t.y1,\n            x2: (t.x1+t.x2)/2,\n            y2: (t.y1+t.y2)/2,\n            x3: (t.x1+t.x3)/2,\n            y3: (t.y1+t.y3)/2\n        };\n        var newTriangle = {\n            x1: t.x1,\n            y1: t.y1,\n            x2: (t.x1+t.x2)/2,\n            y2: (t.y1+t.y2)/2,\n            x3: (t.x1+t.x3)/2,\n            y3: (t.y1+t.y3)/2\n        };\n\n        \n\n        //pen.fillColor = \"black\";\n\n        var leftTriangle = {\n            x1: (t.x1+t.x2)/2,\n            y1: (t.y1+t.y2)/2,\n            x2: t.x2,\n            y2: t.y2,\n            x3: (t.x2+t.x3)/2,\n            y3: (t.y2+t.y3)/2\n        };\n\n\n        var rightTriangle = {\n            x1: (t.x1+t.x3)/2,\n            y1: (t.y1+t.y3)/2,\n            x2: (t.x2+t.x3)/2,\n            y2: (t.y2+t.y3)/2,\n            x3: t.x3,\n            y3: t.y3\n        };\n        newTriangles.push(topTriangle);\n        newTriangles.push(leftTriangle);\n        newTriangles.push(rightTriangle);\n\n    }\n    triangles.push(newTriangles);\n}\nvar trianglesToDrew = triangles[depth-1];\nfor (var i = 0; i \u003ctrianglesToDrew.length; i++) {\n    var t = trianglesToDrew[i];\n    pen.drawTriangle(t.x1, t.y1, t.x2, t.y2, t.x3, t.y3);\n}","created_at":"2019-06-01T10:07:32.923+08:00","updated_at":"2019-10-26T04:21:40.199+08:00","name":"謝爾賓斯基三角形 副本","language":"javascript","screenshot":{"url":"https://cdn1.koding.school/uploads/project/screenshot/70573/d06191781083c529d6b058d94fb1359a.jpg"},"parent_id":11123,"plugin":"","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":92,"hashid":"d5msg4w4","is_content_changed":false,"review_status":"pending","submitted_at":"2019-06-29T11:28:03.022+08:00","reviewed_at":null,"advise":null,"is_deleted":false}