更多三角形 | JavaScript 程式專案

{"id":8230,"student_id":1470,"content":"setBackdrop(\"white\");\nvar cHeight = 480,\n    cWidth = 640;\n\nvar sideLength = cHeight * 2 / Math.sqrt(3);\nvar pen = Game.pen;\n\nvar maxIterations = 0;\n//pen.fillColor = \"blue\";\n//draw initial triangle\n//initial triangle\n//1: up; 2: left, 3: right\nvar triangles = [];\n\nvar triangle = {\n    color: \"black\",\n    x1: cWidth/2,\n    y1: 0,\n    x2: (cWidth - sideLength)/2,\n    y2: cHeight,\n    x3: (cWidth + sideLength)/2,\n    y3: cHeight,\n}\n\ntriangles.push(triangle);\n\nfunction f(triangle, i){\n\n    var whiteTriangle = {\n        color: \"white\",\n        x1: (triangle.x1 + triangle.x2) / 2,\n        y1: (triangle.y1 + triangle.y2) / 2,\n        x2: (triangle.x1 + triangle.x3) / 2,\n        y2: (triangle.y1 + triangle.y3) / 2,\n        x3: (triangle.x2 + triangle.x3) / 2,\n        y3: (triangle.y2 + triangle.y3) / 2,\n    };\n    var upTriangle = {\n        color: \"black\",\n        x1: triangle.x1,\n        y1: triangle.y1,\n        x2: (triangle.x1 + triangle.x2) / 2,\n        y2: (triangle.y1 + triangle.y2) / 2,\n        x3: (triangle.x1 + triangle.x3) / 2,\n        y3: (triangle.y1 + triangle.y3) / 2\n    };\n    var leftTriangle = {\n        color: \"black\",\n        x1: (triangle.x1 + triangle.x2) / 2,\n        y1: (triangle.y1 + triangle.y2) / 2,\n        x2: triangle.x2,\n        y2: triangle.y2,\n        x3: (triangle.x2 + triangle.x3) / 2,\n        y3: (triangle.y2 + triangle.y3) / 2\n    };\n    var rightTriangle = {\n        color: \"black\",\n        x1: (triangle.x2 + triangle.x3) / 2,\n        y1: (triangle.y2 + triangle.y3) / 2,\n        x2: (triangle.x1 + triangle.x3) / 2,\n        y2: (triangle.y1 + triangle.y3) / 2,\n        x3: triangle.x3,\n        y3: triangle.y3\n    }\n\n    triangles.push(whiteTriangle);\n    triangles.push(upTriangle);\n    triangles.push(leftTriangle);\n    triangles.push(rightTriangle);\n    //triangles.splice(i, 1);\n\n}\n\n\n\nforever(function(){\n    for(var i = 0 ; i \u003c triangles.length ; i++){\n        if(triangles[i].color == \"black\"){\n            if(triangles.length \u003c= (Math.pow(3, maxIterations))){\n                f(triangles[i]);\n            } else {\n                return stop();\n            }\n            pen.fillColor = \"black\";\n            pen.drawTriangle(triangles[i].x1, triangles[i].y1, triangles[i].x2, triangles[i].y2, triangles[i].x3, triangles[i].y3);\n        } else if (triangles[i].color == \"white\") {\n            pen.fillColor = \"white\";\n            pen.drawTriangle(triangles[i].x1, triangles[i].y1, triangles[i].x2, triangles[i].y2, triangles[i].x3, triangles[i].y3);\n        }\n    }\n})","created_at":"2017-03-01T20:52:04.729+08:00","updated_at":"2019-11-10T15:35:50.292+08:00","name":"更多三角形","language":"javascript","screenshot":{"url":"https://cdn0.koding.school/uploads/project/screenshot/8230/d79511ba4f3a9aeba6fd89eebf413276.jpg"},"parent_id":2,"plugin":"","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":472,"hashid":"4y3snq4","is_content_changed":null,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}