火箭降落 | JavaScript 程式專案

{"id":14360,"student_id":97,"content":"setBackdrop('bg.jpg');\nvar platform = createSprite(\"platform.png\");\nvar rocket = createSprite( [\"rocket.png\",\"bomb.png\"] );\n\nrocket.x = 50;\nrocket.y = 50;\nrocket.direction = 0;\nplatform.x = 550;\nplatform.y = 450;\n\nvar vx = 0;\nvar vy = 0;\n\nvar fuel = 500;\nforever(function() {\n    print(fuel,30,30,'red',30)\n    rocket.x += vx ;\n    rocket.y += vy ;\n    vy = vy + 0.06;\n    if(key.up \u0026\u0026 fuel\u003e0 ){\n        vy -= 0.1;\n        fuel -= 1;\n    }\n    if(key.up \u0026\u0026 fuel\u003e0 ){\n        vy -= 0.1;\n        fuel -= 1;\n    }\n    if(key.left \u0026\u0026 fuel\u003e0 ){\n        vx -= 0.1;\n        fuel -= 1;\n        rocket.direction -= 1;\n    }\n    if(key.right \u0026\u0026 fuel\u003e0 ){\n        vx += 0.1;\n        fuel -= 1;\n        rocket.direction += 10;\n    }\n\n    if(rocket.touched(platform)){\n        stop();\n    }\n});\n","created_at":"2017-03-01T20:52:04.729+08:00","updated_at":"2019-09-15T17:12:16.150+08:00","name":"火箭降落","language":"javascript","screenshot":{"url":"https://cdn8.koding.school/uploads/project/screenshot/14360/ef81beb3e3a3d860521705168dd78e83.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":124,"hashid":"vngsy88z","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}