火箭降落副本 | JavaScript 程式專案

{"id":38718,"student_id":1404,"content":"setBackdrop('bg.jpg');\nvar platform = createSprite(\"platform.png\");\nvar rocket = createSprite([\"rocket.png\", \"bomb.png\"]);\nvar fuel = 500;\nvar vy = 0; //垂直移動速度（火箭垂直移動一格的距離）\nvar vx = 0; //水平移動速度（火箭水平移動一格的距離）\n\nplatform.x = 500;\nplatform.y = 450;\nrocket.x = 50;\nrocket.y = 50;\nrocket.direction = 0;\n\nforever(function() {\n    rocket.y = rocket.y + vy;\n    rocket.x += vx;\n    rocket.direction = vx * 10;\n\n    if (rocket.touched(platform)) {\n        // 垂直速度往下太快會爆炸\n        if (vy \u003e 1) {\n            rocket.costumeId = 1;\n        }\n        // 太傾斜也會爆炸\n        if (rocket.direction \u003e 6 || rocket.direction \u003c -6) {\n            rocket.costumeId = 1;\n        }\n        stop();\n    }\n    // 超過邊界也會爆炸\n    if (rocket.y \u003c 0 || rocket.y \u003e 480 || rocket.x \u003c 0 || rocket.x \u003e 640) {\n        rocket.costumeId = 1;\n        stop()\n    }\n    \n    if (fuel \u003e 0){\n        if (key.up) {\n            // 按下上鍵，垂直速度往上增加 0.1\n            vy -= 0.1;\n            fuel -= 1;\n        }\n        if (key.right) {\n            // 按下右鍵，水平速度往右增加 0.1\n            vx += 0.1;\n            fuel -= 1;\n        }\n        if (key.left) {\n            // 按下左鍵，水平速度往左增加 0.1\n            vx -= 0.1;\n            fuel -= 1;\n        }\n    }\n\n\n    // 受重力加速度影響，垂直速度往下增加 0.06\n    vy += 0.06;\n\n    print(\"Fuel: \"+ fuel, 10, 10, \"red\", 20);\n    print(\"傾斜角度: \"+ rocket.direction, 10, 30, \"white\", 20);\n    print(\"垂直移動速度: \"+ vy, 10, 50, \"white\", 20);\n});\n\n\n\n","created_at":"2018-08-17T13:55:38.063+08:00","updated_at":"2019-10-25T13:06:18.982+08:00","name":"火箭降落 副本","language":"javascript","screenshot":{"url":"https://cdn9.koding.school/uploads/project/screenshot/38718/47fb5d99a6ff20eb753970a888e81f68.jpg"},"parent_id":10697,"plugin":"var fire = createSprite(\"fire.png\");\nfire.scale = 0.7;\nforever(function() {\n    if(window.rocket \u0026\u0026 window.platform) {\n        fire.x = rocket.x;\n        fire.y = rocket.y;\n        fire.direction = rocket.direction - 180;\n        fire.stepForward(65);\n        fire.direction = rocket.direction;\n        if(window.rocket \u0026\u0026 (key.up || key.left || key.right) \u0026\u0026 window.fuel\u003e0) {\n            fire.hidden = false;\n        } else {\n            fire.hidden = true;\n        }\n        if(rocket.touched(platform)) {\n            // fire.hidden = true;\n        }\n    }\n});","description":"上、左、右推進火箭\n在料用盡前成功火箭降落在平台上。","note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":78,"hashid":"5j3s8j2m","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}