多人賽車 | JavaScript 程式專案

{"id":17258,"student_id":888,"content":"","created_at":"2017-03-01T20:52:04.729+08:00","updated_at":"2019-11-11T22:04:13.495+08:00","name":"多人賽車","language":"javascript","screenshot":{"url":"https://cdn1.koding.school/uploads/project/screenshot/17258/fd1ac05835b665cf0d7e3c5532c7c2d7.jpg"},"parent_id":2,"plugin":"var ID = Date.now().toString() + Math.floor(Math.random()*10000).toString();\nvar hostid;\nvar NAME = prompt('name?');\n\nvar target_1 = createSprite(\"target.jpg\");\nvar target_2 = createSprite(\"target.jpg\");\nvar road = createSprite(\"border.png\");\nvar car = createSprite(\"blue.png\");\ntarget_2.y = -500;\n\nvar speed = 0;\nvar round = 0;\nvar objects = [road, car, target_1, target_2];\n\ntarget = target_2;\n\nvar cars = {};\nvar users = {};\nusers[ID] = {\n    id: ID,\n    name: NAME,\n    updateTime: 0,\n    offsetX: 0,\n    offsetY: 0,\n    direction: 0,\n    status: 0\n};\ncars[ID] = car;\n\nwindow.cars = cars;\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\n    hostid = ID;\n    for (var id in users) {\n        if (id \u003c hostid) {\n            hostid = id;\n        }\n    }\n\n    var h = 0;\n    for (var id in users) {\n        h++;\n        if (id == hostid) {\n            print(users[id].name + '(房主)', 10, 30*h, 'red');\n        } else {\n            print(users[id].name, 10, 30*h, 'red');\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        if (Date.now() \u003e users[id].updateTime + 5000) {\n            cars[id].destroy();\n            delete cars[id];\n            delete users[id];\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        cars[data.id] = car;\n    }\n});\n\nforever(function(){\n    if (car.touched(target_1) \u0026\u0026 target == target_1) {\n        target = target_2;\n        round += 1;\n    }\n    if (car.touched(target_2) \u0026\u0026 target == target_2) {\n        target = target_1;\n        round += 1;\n    }\n    if (round == 2) {\n        users[ID].status = 0;\n    }\n    if (car.touched(road)) {\n        speed = 0.3;\n    }\n    if (speed \u003c 8) {\n        speed += 0.1;\n    }\n    if (key.left) {\n        car.direction -= 3;\n    }\n    if (key.right) {\n        car.direction += 3;\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\u003cobjects.length; i++) {\n        objects[i].move(-offsetX, -offsetY);\n    }\n});\n\nforever(function(){\n\n    for (var i in cars) {\n        var car = cars[i];\n        var fire = createSprite(\"red.png\");\n        fire.moveTo(car);\n        fire.direction = car.direction;\n\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\n        objects.push(fire);\n    }\n});\n\nwhen('keydown', 'enter', function() {\n    if (hostid != ID) {\n        return;\n    }\n    startGame();\n    DB.broadcast('startGame');\n});\n\nfunction startGame () {\n    car.moveTo(road);\n    users[ID].status = 1;\n    target = target_2;\n    round = 0;\n}\n\nDB.onMessage('startGame', startGame);\n","description":null,"note":null,"status":"public","like_student_ids":[2328,2327,173],"is_featured":false,"views":699,"hashid":"gk4skepd","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}