飛向宇宙，浩瀚無垠-3 | JavaScript 程式專案

{"id":12378,"student_id":70,"content":"setBackdrop(\"black\");\n\nvar stars = [];\npen.fillColor = \"white\";\n\nforever(function () {\n    var star = {\n        x: Math.random()*640, // 4. 最後調整\n        y: Math.random()*480, // 4. 最後調整\n        z: 120,\n        r: 0.5\n    }\n    stars.push(star);\n\n    for (var i = 0; i \u003c stars.length; i++) {\n        var star = stars[i];\n        star.x += (star.x-320) / star.z; // 1. 往右平移\n        star.y += (star.y-240) / star.z; // 2. 往右下移動\n        star.z-=1; // 3. 移動越來越快，分母變小，x y移動距離增加，\n        // 4. 最後調整\n        if (star.r \u003c 2) {\n            star.r *= 1.02;\n        }\n        pen.drawCircle(star.x, star.y, star.r); // 4. 最後調整\n    }\n});","created_at":"2017-03-01T20:52:04.729+08:00","updated_at":"2019-11-07T22:02:10.198+08:00","name":"飛向宇宙，浩瀚無垠-3","language":"javascript","screenshot":{"url":"https://cdn9.koding.school/uploads/project/screenshot/12378/d812aef098a15363ad213394645723ce.jpg"},"parent_id":11110,"plugin":"","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":284,"hashid":"5j3s9596","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}