L5_彈力球_除錯範例_2 | JavaScript 程式專案

{"id":183015,"student_id":10,"content":"/**\n * 情境：老師我沒辦法用上下按鍵控制擋板移動\n * 提示：學生就是會亂排版，先要求他們整理一下\n */\n\nvar score_left = 0;\nvar score_right = 0;\nvar speed = 5;\n\nforever(function() {\n\nball.stepForward(speed); //球向前移動\n    \n    //當球超出上下邊界就反彈\n    if(ball.y \u003c 0 || ball.y \u003e 480) {\n    ball.direction = -ball.direction - 180;\n}\n\n//當球撞到左右兩邊擋板就反彈\nif(ball.touched(p2) || ball.touched(p1)) {\n    ball.direction = -ball.direction + Math.random()*15;\n    speed = speed + 0.5;\n}\n});\n\n//玩家按下「上」鍵\nif(key.up) {\n    p1.y = p1.y - 10; //右邊擋板向上移動\n}\n\n//玩家按下「下」鍵\nif(key.down) {\n    p1.y = p1.y + 10; //右邊擋板向下移動\n}\n\n//玩家按下「w」鍵\nif(key.w) {\n    p2.y = p2.y - 10; //左邊擋板向上移動\n}\n\n//玩家按下「s」鍵\nif(key.s) {\n    p2.y = p2.y + 10; //左邊擋板向下移動\n}\n","created_at":"2020-08-19T16:34:39.763+08:00","updated_at":"2022-11-02T15:13:51.601+08:00","name":"L5_彈力球_除錯範例_2","language":"javascript","screenshot":{"url":"https://cdn4.koding.school/uploads/project/screenshot/183015/7b578f02be353f69e12a09d9de983570.jpg"},"parent_id":73437,"plugin":"setBackdrop('bg.jpg');\nvar ball = createSprite(\"ball.png\");\nvar p2 = createSprite({\n    costumes: \"blue.jpg\",\n    x: 10,\n    y: 250\n});\nvar p1 = createSprite({\n    costumes: \"orange.jpg\",\n    x: 631,\n    y: 250\n});\n// =================================//\n","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":222,"hashid":"2pdsg822","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}