空氣球 | JavaScript Programming Project | OrangeApple Learning Platform

{"id":7884,"student_id":10,"content":"setBackdrop('bg.jpg');\n\nvar speed = 0;\nvar score_left = 0;\nvar score_right = 0;\n\nvar ball = createSprite(\"ball.png\");\n\nrestart();\n\nvar player_left = createSprite({\n    costumes: \"blue.jpg\",\n    x: 10,\n    y: 250\n});\n\nvar player_right = createSprite({\n    costumes: \"orange.jpg\",\n    x: 631,\n    y: 250\n});\n\n\nwhen('holding','up', function() {\n\tplayer_right.y -= 10;\n});\nwhen('holding','down', function() {\n\tplayer_right.y += 10;\n});\nwhen('holding','w', function() {\n\tplayer_left.y -= 10;\n});\nwhen('holding','s', function() {\n\tplayer_left.y += 10;\n});\n\nforever(function() {\n\n    ball.stepForward(speed);\n    \n    if(ball.y \u003c 10 || ball.y \u003e 470) {\n    \tball.direction = 180 - ball.direction;\n    }\n    \n    if(ball.touched(player_left) || ball.touched(player_right)) {\n        ball.direction = - ball.direction + Math.random()*15;\n        ball.stepForward(1);\n        if(speed \u003c 15) {\n        \tspeed += 2;\n        }\n    }\n    \n    if(ball.x \u003c 0) {\n    \tscore_right += 1;\n    \trestart();\n    }\n    \n    if(ball.x \u003e 640) {\n    \tscore_left += 1;\n    \trestart();\n    }\n    \n    print(score_left, 30, 20, '#157df9', 40);\n    print(score_right, 580, 20, '#fd7e24', 40);\n\n});\n\nfunction restart () {\n\tball.x = 320;\n    ball.y = 240;\n    speed = 2;\n    ball.direction  = Math.random() \u003e 0.5 ? 90 : 270;\n}","created_at":"2017-03-01T20:52:04.729+08:00","updated_at":"2019-11-08T07:58:28.388+08:00","name":"空氣球","language":"javascript","screenshot":{"url":null},"parent_id":2,"plugin":"","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":529,"hashid":"p93s9gq","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}