擊落星球 | JavaScript 程式專案

{"id":78334,"student_id":10,"content":"var player;\nvar balls = [];\nvar score = 0;\nvar clock = 0;\n\nfunction createTarget (x, y) {\n    var t = createSprite(['target_3.png','target_4.png','target_5.png']);\n    t.moveTo(x, y);\n    t.clock = 0;\n    t.scale = 0.6;\n    t.forever(function () {\n        t.clock++;\n        \n        if (t.clock == 10) {\n            t.costumeId = 1;\n        }\n        if (t.clock == 20) {\n            t.costumeId = 2;\n        }\n        if (t.clock == 30) {\n            t.destroy();\n        }\n    });\n}\n\nfunction fire () {\n    var b = createSprite('bullet.png');\n    b.moveTo(player);\n    b.direction = 0;\n    b.forever(function () {\n        b.stepForward(8);\n        if (b.y \u003c 0) b.destroy();\n    });\n    \n    b.on('touch', balls, function (target) {\n        target.life--;\n        b.destroy();\n    })\n}\n\nfunction createBall () {\n    let b = createSprite(['ball_1.png','ball_2.png','ball_3.png']);\n    \n\n    b.reset = function () {\n        b.scale = 1.3;\n        b.costumeId = Math.floor(Math.random()*3);\n        b.vy = 0;\n        b.vx = 0;\n        b.life = 3;\n        b.freeze = true;\n        b.moveTo(Math.random()*640, -35);\n        setTimeout(function() { b.freeze = false }, 1000 + Math.random()*3000);\n    }\n    b.forever(function() {\n        if (b.freeze) return;\n        b.vy += 0.35;\n        b.y += b.vy;\n        b.x -= b.vx;\n        if (b.y \u003e 400) {\n            b.y -= b.vy;\n            b.vy = -b.vy;\n            if (b.vx == 0) {\n                b.vx = Math.random() \u003e 0.5 ? 5: -5;\n                b.vy *= 0.85;\n            }\n        }\n\n        if (b.x \u003c 0 || b.x \u003e 640) {\n            b.vx *= -1;\n        }\n        if (b.life \u003c= 0) {\n            createTarget(b.x, b.y);\n            b.reset();\n            score += 30;\n        }\n    });\n    b.reset();\n    return b;\n}\n\n\nsetBackdrop(\"bg.png\", 0, 0, 640, 480);\n\nvar startBtn = createSprite(\"start.svg\");\nstartBtn.vd = 2;\nstartBtn.forever(function () {\n    if (startBtn.direction \u003e 120) {\n        startBtn.vd = -2;\n    }\n    if (startBtn.direction \u003c 60) {\n        startBtn.vd = +2;\n    }\n   startBtn.direction += startBtn.vd; \n});\nstartBtn.on('click', function (){\n    startBtn.destroy();\n    \n    player = createSprite(\"player.png\");\n    player.moveTo(332, 375);\n    player.scale = 0.7;\n    player.power = 0;\n    \n    balls = [createBall(), createBall(), createBall()];\n    \n    forever(function() {\n        if ((key.d || key.right) \u0026\u0026 player.x \u003c 640) {\n            player.x += 8;\n            player.power++;\n        }\n        if ((key.a || key.left) \u0026\u0026 player.x \u003e 0) {\n            player.x -= 8;\n            player.power++;\n        }\n        if (player.power \u003e 6) {\n            fire();\n            player.power = 0;\n        }\n        clock++;\n        if (clock%60==0) {\n            score++;\n        }\n        print('分數: ' +score, 10, 10, 'red', 30)\n    });\n    player.on('touch', balls, stop);\n});\n\n\n\n\n\n\n\n\n\n","created_at":"2019-07-11T13:50:28.592+08:00","updated_at":"2019-10-26T13:36:07.448+08:00","name":"擊落星球","language":"javascript","screenshot":{"url":"https://cdn3.koding.school/uploads/project/screenshot/78334/89edcce60b8890776f43b51e69f48ea4.jpg"},"parent_id":2,"plugin":"","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":296,"hashid":"ej9skqy6","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}

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