太空防衛戰（預設版） | JavaScript Programming Project

{"id":320185,"student_id":10,"content":"let bg = createSprite('bg.png'); //背景圖\nlet master = createSprite('master_0.png', 'master_1.png', 'master_2.png'); //魔王\nlet myLaser = createSprite('laser_b.png'); //玩家雷射\nlet player = createSprite('player.png'); //玩家飛船\nlet info = createSprite('info.png', 'success.png', 'fail.png'); //遊戲說明\n\nlet enemies = []; //存放小兵角色\nlet lasers = []; //存放敵人雷射\nlet clock = 0; //紀錄遊戲迴圈執行次數\nlet level = 2; //關卡等級\nlet playerLife = 10; //玩家血量\nlet masterLife = 10; //魔王血量\nlet count = 0; //消滅小兵數量\nlet vx = 3; //魔王水平移動速度\n\nmaster.y = 100; //\nplayer.y = 800;\nmyLaser.direction = 0;\nmyLaser.hidden = true;\ninfo.layer = 1;\nplayer.layer = 2;\n\ncreateSound('bgm.mp3', true);\n\n//初始化關卡\nfunction startLevel () {\n    clock = -500; //重置計時器\n    level += 1; //切換下個關卡等級\n    count = 0; //重置小兵消滅數\n    masterLife = 10; //恢復魔王血量\n    playerLife = 10; //恢復玩家血量\n    enemies = []; // 清空陣列\n\n    // 創造小兵\n    for (let y = 0; y \u003c level; y++) {\n        for (let x = 0; x \u003c 9; x++) {\n            let e = createSprite('enemy_0.png', 'enemy_1.png', 'enemy_2.png');\n            e.x = 50 + x * 100;\n            e.y = 250 + y * 100 - 500;\n            e.costumeId = level - 1;\n            enemies.push(e); //存入陣列\n        }\n    }\n    master.costumeId = level - 1;\n    master.y = -400;\n}\n\n//遊戲主迴圈\nfunction gameloop () {\n    if (info.opacity \u003c 1) {\n        clock++;\n        myLaser.y -= 30;\n        updatePlayer(); //更新玩家\n        updateMaster(); //更新魔王\n        updatelasers(); //更新敵人雷射\n        enemies.forEach(updateEnemy); //更新小兵\n        checkIsGameover(); //檢查遊戲是否結束\n        updateBg(); //更新背景圖\n        drawTexts(); //顯示變數資訊\n    }\n    if (key.space) {\n        info.opacity = 0; //隱藏遊戲說明\n    }\n    if (info.costumeId != 0 \u0026\u0026 info.opacity \u003c 1) {\n        info.opacity += 0.01;\n    }\n}\n\n//更新玩家角色\nfunction updatePlayer () {\n    // 玩家向右移動\n    if (key.right \u0026\u0026 player.x \u003c 1100) {\n        player.x += 5;\n    }\n    // 玩家向左移動\n    if (key.left \u0026\u0026 player.x \u003e 100) {\n        player.x -= 5;\n    }\n    // 玩家發射雷射\n    if (key.up \u0026\u0026 (myLaser.y \u003c 0 || myLaser.hidden)) {\n        myLaser.x = player.x;\n        myLaser.y = player.y;\n        myLaser.hidden = false;\n        createSound('laser.mp3');\n    }\n}\n\n//更新魔王角色\nfunction updateMaster () {\n    master.x += vx;\n    // 移動到邊界轉向以及有 1/100 的機率會隨機轉向\n    if (master.x \u003e 1100 || master.x \u003c 100 || Math.random() \u003c 0.01) {\n        vx = -vx;\n    }\n\n    // 如果雷射碰到魔王\n    master.hidden = false;\n    if (master.touched(myLaser)) {\n        masterLife -= 1; //魔王血量減少\n        myLaser.hidden = true; //隱藏玩家雷射\n        master.hidden = true;\n        createSound('boom.mp3');\n    }\n    \n    if (clock % 60 == 0) {\n        if (level == 1 || level == 3) {\n            createLaser(master.x, master.y, 180);    \n        }\n        if (level == 2 || level == 3) {\n            createLaser(master.x - 40, master.y, 180); \n            createLaser(master.x + 40, master.y, 180);\n        }\n    }\n    \n    if (clock % 300 == 0) {\n        for (let i = 0; i \u003c 12; i++) {\n            createLaser(master.x, master.y, i * 30);\n        }\n    }\n    \n    if (clock \u003c 0) {\n        master.y += 1;\n    }\n}\n\n//更新小兵\nfunction updateEnemy(e) {\n    // 如果小兵碰到雷射\n    if (e.touched(myLaser)) {\n        e.destroy(); //移除小兵角色\n        myLaser.hidden = true; //隱藏玩家雷射\n        count++; //紀錄擊殺小兵數加一\n        for (let i = 0; i \u003c 8; i++) {\n            createLaser(e.x, e.y, i * 45);\n        }\n        createSound('boom.mp3');\n    }\n\n    // 沒有被消滅的小兵移動到玩家範圍就結束遊戲\n    if (e.y \u003e 800 \u0026\u0026 e.hidden == false) playerLife = 0;\n\n    if (clock \u003c 0) {\n        e.y += 1;\n    } else {\n        let re = clock % 700;\n        if (re \u003c 300) e.x += 1;\n        else if (re \u003c 350) e.y += 1;\n        else if (re \u003c 650) e.x -= 1;\n        else e.y += 1;    \n    }\n\n}\n\n//創造敵人雷射\nfunction createLaser (x, y, d) {\n    let laser = createSprite('laser_r.png');\n    laser.moveTo(x, y);\n    laser.direction = d;\n    lasers.push(laser);\n}\n\n//更新敵人雷射\nfunction updatelasers () {\n    player.hidden = false;\n    // 使用迴圈將雷射逐一取出更新\n    for (let i = 0; i \u003c lasers.length; i++) {\n        lasers[i].stepForward(5); //雷射向下移動\n        if (lasers[i].touched(player)) {\n            lasers[i].destroy(); //移除敵人雷射\n            playerLife -= 1; //玩家血量減少 1\n            player.hidden = true;\n            createSound('boom.mp3');\n        }\n    }\n}\n\n//檢查遊戲是否結束\nfunction checkIsGameover () {\n    if (masterLife \u003c= 0) {\n        if (level == 3) {\n            info.costumeId = 1; //切換獲勝圖    \n        } else {\n            startLevel();\n        }\n    }\n    if (playerLife \u003c= 0) {\n        info.costumeId = 2; //切換失敗圖\n    }\n}\n\n//更新背景圖\nfunction updateBg () {\n    bg.y += 2;\n    if (bg.y \u003e= 900) {\n        bg.y -= 900;\n    }\n}\n\n//顯示遊戲資訊\nfunction drawTexts () {\n    drawText('masterLife: ' + masterLife, 10, 10, 'white', 30);\n    drawText('playerLife: ' + playerLife, 10, 40, 'white', 30);\n    drawText('level: ' + level, 10, 70, 'white', 30);\n    drawText('count: ' + count, 10, 100, 'white', 30);\n}\n\nforever(gameloop); //不斷重複執行遊戲迴圈\nstartLevel(); //開始新的關卡","created_at":"2021-11-28T18:26:38.817+08:00","updated_at":"2022-06-15T13:25:00.021+08:00","name":"太空防衛戰（預設版）","language":"javascript","screenshot":{"url":"/uploads/project/screenshot/320185/b230fa3bcc0fafe3f75ee57f07ce202f.jpg"},"parent_id":2,"plugin":"Game.set({width: 1200, height: 900})","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":352,"hashid":"36ysm92ev","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}

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