多人賽車 | JavaScript 程式專案

{"id":17557,"student_id":2328,"content":"var ID = Date.now();\nvar hostid;\nvar NAME = prompt(\"name?\");\n\nvar target_1 = createSprite(\"target.jpg\");;\ntarget_1.direction = 135;\nvar target_2 = createSprite(\"target.jpg\");\ntarget_2.direction =345; \ntarget_2.x += 550; \ntarget_2.y += -600;\n\nvar road = createSprite(\"border.png\");\nvar car = createSprite(\"red.png\");\n\nvar speed = 0;\nvar round = 0;\nvar users = {};\nvar cars = {};\n\n\nusers[ID] = {\n    id:ID,\n    name:NAME,\n    offsetX:0,\n    offsetY:0,\n    direction:0,\n    status:0,\n    upDatetime:Date.now()\n\n};\ncars[ID] = car;\n\nvar objects = [target_1, target_2, road, car];\ntarget = target_2\n\nforever(function(){\n\n    users[ID].updateTime = Date.now()\n    users[ID].offsetX = car.x - road.x;\n    users[ID].offsetY = car.y - road.y;\n    users[ID].direction = car.direction;\n\n    DB.broadcast(\"update\",users[ID]);\n    var hostid = ID\n    for (var id in users){\n        if(hostid \u003e id){\n        hostid = id\n        }\n    }\n    \n\n\n\n\n\n    var h = 0\n\n   \n    for(var id in users){\n         h++;\n         if(id == hostid){\n          print(users[id].name + '(房主)',0,30*h ,\"red\");\n         }else{\n          print(users[id].name,0,30*h ,\"red\");\n         }\n\n\n       cars[id].x = users[id].offsetX + road.x;\n       cars[id].y = users[id].offsetY + road.y;\n       cars[id].direction = users[id].direction;\n\n\n       if(Date.now() \u003e users[id].updateTime + 5000){\n           cars[id].destroy();\n           delete cars[id];\n           delete users[id];\n       }\n      \n       }\n});\n\nDB.onMessage(\"update\",function(data){\n   if(users[data.id]){\n       users[data.id] = data;\n   }else{\n       users[data.id] = data;\n       var car = createSprite(\"red.png\");\n       car[data.id] = car;\n   }\n});\n\n\nforever(function () {\n  \n  if (car.touched(target_1 \u0026\u0026 target == target_1)) {\n       round = 1;\n   }\n   \n    if (car.touched(target_2 \u0026\u0026 target == target_2)) {\n       target = target_1;\n   }\n\n  if (round == 1) {\n       users[ID].status = 0;\n   }\n  \n   \n   if (speed \u003c 8) {\n       speed = speed + 0.1;\n   }\n   if (key.right) {\n       car.direction += 3;\n   }\n   if (key.left) {\n       car.direction -= 3;\n   }\n   if (car.touched(road)) {\n       speed = 0.3\n   }\n\n   if(users[ID].status ==1){\n       car.stepForward(speed);\n   }\n\n   var offsetX = car.x - 320;\n   var offsetY = car.y - 240;\n\n   for (var i = 0; i \u003c objects.length; i++) {\n       objects[i].move(-offsetX, -offsetY);\n   }\n\n});\n\nforever(function() {\n\n   var fire = createSprite(\"red.png\");\n   fire.moveTo(car);\n    fire.direction = car.direction;\n    fire.forever(function () {\n        this.scale -=0.02;\n        this.opacity -=0.02;\n        if(this.scale \u003c= 0  || this.opacity \u003c= 0){\n            this.destroy();\n        }\n    });\n   objects.push(fire);\n});\n\nwhen('keydown', 'enter', function() {\n    if(ID != hostid){\n       return \n    }else{\n        startGame()\n    }\n    DB.broadcast(\"startGame\")\n});\nfunction startGame(){\n    car.moveTo(road);\n    car.direction = 45;\n    users[ID].status = 1;\n    round = 0;\n    \n};\nDB.onMessage('startGame', startGame)","created_at":"2017-03-01T20:52:04.729+08:00","updated_at":"2019-11-06T21:21:24.856+08:00","name":"多人賽車","language":"javascript","screenshot":{"url":"https://cdn7.koding.school/uploads/project/screenshot/17557/89edcce60b8890776f43b51e69f48ea4.jpg"},"parent_id":17296,"plugin":"","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":150,"hashid":"jzmse25e","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}