無窮的三角形 | JavaScript 程式專案

{"id":9074,"student_id":70,"content":"stopRendering();\n\ndrawBackdrop(\"white\");\npen.fillColor = \"black\";\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];\nvar depth = 8;\n\nfor(var i=0; i\u003cdepth; i++){\n    var newTriangles = [];\n    for(var j=0; j\u003ctriangles[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 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        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    triangles.push(newTriangles);\n}\n\nvar trianglesToDraw = triangles[depth-1];\nfor(var i=0; i\u003ctrianglesToDraw.length; i++){\n    var t = trianglesToDraw[i];\n    pen.drawTriangle(t.x1,t.y1,t.x2,t.y2,t.x3,t.y3);\n}","created_at":"2017-03-01T20:52:04.729+08:00","updated_at":"2019-11-07T13:28:11.617+08:00","name":"無窮的三角形","language":"javascript","screenshot":{"url":"https://cdn7.koding.school/uploads/project/screenshot/9074/fd1ac05835b665cf0d7e3c5532c7c2d7.jpg"},"parent_id":2,"plugin":"","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":336,"hashid":"rdvser4","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}