多人賽車 | JavaScript 程式專案

{"id":21782,"student_id":282,"content":"var target_1 = createSprite(\"target.jpg\");\r\nvar ID = 0;\r\nvar NAME = prompt(\"name?\");\r\nvar target_2 = createSprite(\"target.jpg\");\r\nvar border = createSprite(\"border.png\");\r\nvar car = createSprite(\"blue.png\");\r\nvar speed = 0;\r\nvar round = 0;\r\nvar yet = false;\r\nvar target= 1;\r\nvar objects = [border, car, target_1, target_2];\r\nforever(function(){\r\n    print(round,10,50,'red');\r\n    print(target,10,70,'red');\r\n    print(yet,10,90,'red');\r\n    if (car.touched(border)) {\r\n        speed = 0.3;\r\n    }\r\n    if (speed \u003c 8) {\r\n        speed += 0.1;\r\n    }\r\n    if (key.left) {\r\n        car.direction -= 3;\r\n    }\r\n    if (key.right) {\r\n        car.direction += 3;\r\n    }\r\n    car.stepForward(speed);\r\nif ((car.touched(target_2) \u0026\u0026 target == 2 )) {\r\n    target = 1; \r\n    if(yet = true) {\r\n        round += 1;\r\n        yet = false; \r\n}\r\n}\r\nif ((car.touched(target_1) \u0026\u0026 target == 1 )) {\r\n    target = 1;\r\n    yet = true;\r\n}\r\nif (round == 1) {\r\n    stop();\r\n}\r\n    var offsetX = car.x - 320;\r\n    var offsetY = car.y - 240;\r\n\r\n    for (var i=0; i\u003cobjects.length; i++) {\r\n        objects[i].move(-offsetX, -offsetY);\r\n    }\r\n});\r\n\r\nforever(function(){\r\n    var fire = createSprite(\"blue.png\");\r\n    fire.moveTo(car);\r\n    fire.direction = car.direction;\r\n\r\n    fire.forever(function () {\r\n        this.scale -= 0.02;\r\n        this.opacity -= 0.02;\r\n        if (this.scale \u003c= 0 || this.opacity \u003c= 0) {\r\n            this.destroy();\r\n        }\r\n    });\r\n\r\n    objects.push(fire);\r\n});\r\n\r\n","created_at":"2018-02-03T20:32:04.024+08:00","updated_at":"2019-10-28T23:43:30.263+08:00","name":"多人賽車","language":"javascript","screenshot":{"url":"https://cdn1.koding.school/uploads/project/screenshot/21782/e076a303f6d322618fe0427c26095ab7.jpg"},"parent_id":17296,"plugin":"","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":93,"hashid":"gk4spmw5","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}