自動駕駛副本 | JavaScript 程式專案

{"id":71440,"student_id":4667,"content":"var SIZE = 50; // 每個世代的個數\nvar DNA_LENGTH = 24; // DNA 的長度\nvar generation = 0; // 紀錄目前是第幾代\nvar alive = 0\n\n//===========示範程式開始實作後可移除===========//\nvar car = new Car();\ncar.speed = 3; // 設定車速\ncar.reset(50, 50, 90);\n\nforever(function () {\n    if (key.right) car.turn(3);\n    if (key.left) car.turn(-3);\n    if (key.up) car.speedUp(0.1);\n    if (key.down) car.speedUp(-0.1);\n});\n//============================================//\n\nfor (var i = 0; i \u003c SIZE; i++) {\n    var newcar = new Car()\n    newcar.addSensor(60)\n    newcar.addSensor(30)\n    newcar.addSensor(0)\n    newcar.addSensor(-30)\n    newcar.addSensor(-60)\n    newcar.speed = 3\n    newcar.score = 0\n    newcar.gens = randomDNA(DNA_LENGTH)\n    newcar.reset(50, 250, 0)\n}\n\n// 手動進入下一個世代來加速學習\nwhen('keydown', 'space', nextGeneration);\n\n\n\n// 不斷檢查所有車子的狀態是否都毀損\n// 如果是則進入下一個世代\nforever(function() {\n    for (var i = 1; i \u003c cars.length; i++) {\n        var gens = cars[i].gens\n        var sensors = cars[i].sensorsData\n        var output = NN(sensors, gens)\n        cars[i].turn(output)\n\n        if (cars[i].status == 'running') {\n            cars[i].score += 1\n            alive += 1\n        }\n    }\n\n    if (alive == 0) {\n        nextGeneration()\n    }\n\n    alive = 0\n});\n\n// 當所有車子都壞掉時，會觸發這個函式\nfunction nextGeneration () {\n\n    cars.sort(function(a, b) {\n        return b.score - a.score\n    })\n\n    var mom = cars[1].gens\n    var dad = cars[2].gens\n\n    for (var i = 1; i \u003c SIZE; i++) {\n        cars[i].gens  = crossover(mom, dad)\n        cars[i].score = 0\n        cars[i].reset(50, 250, 0)\n    }\n}\n\n    \n// 產生 dna1 dna2 的下一代基因\nfunction crossover (a, b) {\n    var gens = []\n    for (var i = 0; i \u003c DNA_LENGTH; i++) {\n        var p = Math.random()\n\n        if (p \u003e 0.5) {\n            gens[i] = a[i]\n            // 媽媽的基因\n        } else {\n            if (p \u003c 0.02) {\n                gens[i] = Math.random() * 2 - 1\n            } else {\n                gens[i] = b[i]\n            }\n\n        }\n    }\n\n    return gens\n}\n\n\n// length 要產生的 dna 長度\nfunction randomDNA (length) {\n    var dna = []\n    for (var i = 0; i \u003c length; i++) {\n        dna.push(Math.random() * 2 - 1)\n    }\n    return dna\n}\n\n// S型函數\nfunction activation(x) {\n    var r = (Math.exp(x) - Math.exp(-x)) / (Math.exp(x) + Math.exp(-x))\n    return r\n}\n\nfunction NN (inputs, weights) {\n    var output\n    var i = inputs\n    var w = weights\n\n    var a = w[0] * i[0] + w[1] * i[1] + w[2] * i[2] + w[3] * i[3] + w[4] * i[4]\n    var b = w[5] * i[0] + w[6] * i[1] + w[7] * i[2] + w[8] * i[3] + w[9] * i[4]\n    var c = w[10] * i[0] + w[11] * i[1] + w[12] * i[2] + w[13] * i[3] + w[14] * i[4]\n    var d = w[15] * i[0] + w[16] * i[1] + w[17] * i[2] + w[18] * i[3] + w[19] * i[4]\n\n    a = activation(a)\n    b = activation(b)\n    c = activation(c)\n    d = activation(d)\n\n    output = w[20] * a + w[21] * b + w[22] * c + w[23] * d\n\n    return output\n}","created_at":"2019-06-02T10:10:21.484+08:00","updated_at":"2019-11-10T15:38:33.255+08:00","name":"自動駕駛 副本","language":"javascript","screenshot":{"url":"https://cdn1.koding.school/uploads/project/screenshot/71440/05948fb11c3d3305a1078aaf4619f8cc.jpg"},"parent_id":70443,"plugin":"function Point (x, y) {\n    this.x = x || 0;\n    this.y = y || 0;\n}\n\nfunction Line (p1, p2, size, color) {\n\n    this.p1 = p1;\n    this.p2 = p2;\n    this.size = size || 1;\n    this.color = color || 'black';\n    this.a = 0;\n    this.b = 0;\n    \n    // 使用在繪圖用對應的 forever\n    this.instance = createSprite('dot.jpg');\n    this.instance.hidden = true;\n    \n    // y = ax + b\n    // a:斜率 b:常數\n    this.update = function () {\n        // 計算斜率\n        this.a = (this.p1.y - this.p2.y) / (this.p1.x - this.p2.x);\n        \n        // 這招真的很無恥，斜率 1000 畫面上分辨不出是否垂直線\n        // 在計算交會點的時候就很方便，不用再判斷是否為垂直線\n        if (Math.abs(this.a) \u003e 1000) this.a = 1000;\n        \n        // 計算常數項\n        this.b = this.p1.y - this.p1.x*this.a;\n    }\n    this.update(); // 初始化更新\n    \n    \n    // 取得兩線斷相交的座標，如果沒有相交就回傳 undefined\n    this.touched = function (line) {\n\n        if (!this.isCrossWith(line)) return; // undefined\n        \n        let x = (line.b - this.b)/(this.a - line.a);\n        let y = this.a*x + this.b;\n        return {x: x, y: y};\n    }\n    \n    // 兩線斷是否相交\n    this.isCrossWith = function (line) {\n        return line._calc(this.p1.x, this.p1.y) * line._calc(this.p2.x, this.p2.y) \u003c 0 \u0026\u0026\n               this._calc(line.p1.x, line.p1.y) * this._calc(line.p2.x, line.p2.y) \u003c 0\n    }\n\n    this._calc = function (x, y) {\n        if (Math.abs(this.a) == Infinity) return x - this.b;\n        return this.a*x + this.b - y;\n    }\n    \n    // 渲染線條\n    this.render = function () {\n        pen.size = this.size;\n        pen.color = this.color;\n        pen.drawLine(this.p1.x, this.p1.y, this.p2.x, this.p2.y);\n    }\n    \n    // 刪除線條\n    this.destroy = this.instance.destroy.bind(this.instance);\n    \n    var self = this;\n    this.instance.forever(function(){\n        self.update();\n        self.render();\n    });\n}\n\n\nvar walls = []; // 存放賽道線條\nvar cars = []; // 存放所有製造出來的車子\n\n\nfunction Car (x, y) {\n    \n    let width = 17; // 車體中心到四個角的距離\n    let sensorLength = 1000; // 感測器的長度距離\n\n    let center = createSprite('dot.jpg');\n    center.x = x || 320;\n    center.y = y || 240;\n    center.speed = 1; // 預設車速\n    center.status = 'running'; // running, broken\n    \n    // 車體的四個點\n    let p1 = new Point();\n    let p2 = new Point();\n    let p3 = new Point();\n    let p4 = new Point();\n    center.corner = [p1, p2, p3, p4];\n    \n    // 車體邊框\n    center.border = [\n        new Line(p1, p2, 2),\n        new Line(p2, p3, 2),\n        new Line(p3, p4, 2),\n        new Line(p4, p1, 2),\n    ];\n    \n    // 感測器的線段終點\n    center.censorPoints = [];\n    // 感測器的線段\n    center.sensors = []\n    // sensors 角度\n    center.offset = [];\n    // 感測器讀取的資料\n    center.sensorsData = [];\n    \n\n    center.updateLines = function () {\n        for (var i=0; i\u003c4; i++) {\n            this.border[i].update();\n        }\n        for (var i=0; i\u003cthis.offset.length; i++) {\n            this.sensors[i].update();\n        }\n    }\n    \n    center.update = function () {\n        var self = this;\n        this.border.forEach((line) =\u003e {\n           if (self.status == 'broken') line.color = 'gray';\n           else line.color = 'black';\n        });\n        \n        // 更新車體的四個點座標\n        var offset = [30, 150, -150, -30];\n        for (var i=0; i\u003c4; i++) {\n            this.direction += offset[i];\n            this.stepForward(width);\n            this.corner[i].x = this.x;\n            this.corner[i].y = this.y;\n            this.stepForward(-width);\n            this.direction -= offset[i];\n        }\n        \n        // 更新感測器的線\n        var offset = [-45, -22.5, 0, 22.5, 45];\n        var offset = [-60, 0, 60];\n        for (var i=0; i\u003cthis.offset.length; i++) {\n            center.direction += this.offset[i];\n            center.stepForward(sensorLength);\n            center.censorPoints[i].x = center.x;\n            center.censorPoints[i].y = center.y;\n            center.stepForward(-sensorLength);\n            center.direction -= this.offset[i];\n        }\n        \n        this.updateLines();\n    };\n    \n    center.turn = function (direction) {\n        if (isNaN(direction) || this.status == 'broken') return;\n        if (direction \u003e this.speed) direction = this.speed;\n        if (direction \u003c -this.speed) direction = -this.speed;\n        this.direction += direction;\n    }\n    \n    center.speedUp = function (speed) {\n        if (isNaN(speed) || this.status == 'broken') return;\n        this.speed += speed;\n        if (this.speed \u003c 0) this.speed = 0;\n    }\n    \n    center.reset = function (x, y, direction) {\n        this.x = x;\n        this.y = y;\n        this.direction = direction;\n        this.update();\n        this.status = 'running';\n    }\n    \n    center.addSensor = function (direction) {\n        let point = new Point();\n        let line = new Line(this, point, 0, '#00000000');\n        this.censorPoints.push(point);\n        this.sensors.push(line);\n        this.offset.push(direction);\n    }\n    \n    forever(function () {\n        if (center.status == 'running') {\n            center.stepForward(center.speed);\n        }\n        center.update();\n    });\n    \n    center.update(); // 初始化更新\n    \n    cars.push(center);\n    return center;\n}\n\n\nforever(function(){\n    \n    // 檢查車子是否碰到賽道邊界，碰到則將車子狀態改成 broken\n    cars.forEach(function (car) {\n        for (var x=0; x\u003ccar.border.length; x++) {\n            for (var y=0; y\u003cwalls.length; y++) {\n                if (car.border[x].touched(walls[y])) {\n                    car.status = 'broken';\n                    return;\n                }\n            }\n        }\n    });\n    \n    // 更新車子感測器的數值\n    cars.forEach(function (car) {\n        if (car.status == 'broken') return;\n        for (var x=0; x\u003ccar.sensors.length; x++) {\n            \n            var shortest = Infinity;\n            var target = {};\n            \n            for (var y=0; y\u003cwalls.length; y++) {\n                let pos = car.sensors[x].touched(walls[y]);\n                if (pos) {\n                    let length = Math.sqrt((pos.x - car.x)**2 + (pos.y - car.y)**2);\n                    if (length \u003c shortest) {\n                        shortest = Math.round(length);\n                        target = pos;\n                    }\n                }\n            }\n            \n            car.sensorsData[x] = shortest;\n            pen.color = '#aaa';\n            pen.size = 1;\n            pen.drawLine(car.x, car.y, target.x, target.y);\n            pen.fillColor = 'red';\n            pen.drawCircle(target.x, target.y, 3);\n        }\n    });\n});\n\n// 初始化賽道牆壁\nfunction initalMaps (map) {\n    walls.forEach(function (line) { line.destroy() });\n    walls = [];\n    map.forEach(function (points) {\n        for (var i=1; i\u003cpoints.length; i++) {\n            let p1 = new Point(points[i - 1].x, points[i - 1].y);\n            let p2 = new Point(points[i].x, points[i].y);\n            let l =new Line(p1, p2, 3);\n            walls.push(l)\n        }\n    });\n}\n\nlet maps = [[{\"x\":7,\"y\":91},{\"x\":10,\"y\":65},{\"x\":24,\"y\":40},{\"x\":45,\"y\":22},{\"x\":70,\"y\":10},{\"x\":93,\"y\":6},{\"x\":532,\"y\":4},{\"x\":563,\"y\":7},{\"x\":593,\"y\":15},{\"x\":614,\"y\":33},{\"x\":628,\"y\":58},{\"x\":632,\"y\":84},{\"x\":632,\"y\":112},{\"x\":629,\"y\":389},{\"x\":626,\"y\":416},{\"x\":613,\"y\":441},{\"x\":594,\"y\":459},{\"x\":563,\"y\":469},{\"x\":523,\"y\":471},{\"x\":432,\"y\":471},{\"x\":327,\"y\":470},{\"x\":308,\"y\":462},{\"x\":293,\"y\":440},{\"x\":292,\"y\":409},{\"x\":292,\"y\":381},{\"x\":369,\"y\":189},{\"x\":369,\"y\":174},{\"x\":360,\"y\":160},{\"x\":324,\"y\":160},{\"x\":284,\"y\":160},{\"x\":248,\"y\":162},{\"x\":238,\"y\":180},{\"x\":234,\"y\":205},{\"x\":235,\"y\":378},{\"x\":235,\"y\":412},{\"x\":229,\"y\":440},{\"x\":204,\"y\":461},{\"x\":164,\"y\":470},{\"x\":121,\"y\":474},{\"x\":76,\"y\":472},{\"x\":45,\"y\":464},{\"x\":26,\"y\":446},{\"x\":12,\"y\":422},{\"x\":7,\"y\":389},{\"x\":8,\"y\":92}],[{\"x\":100,\"y\":106},{\"x\":102,\"y\":89},{\"x\":114,\"y\":82},{\"x\":492,\"y\":81},{\"x\":510,\"y\":86},{\"x\":519,\"y\":100},{\"x\":521,\"y\":367},{\"x\":514,\"y\":382},{\"x\":495,\"y\":388},{\"x\":421,\"y\":388},{\"x\":406,\"y\":374},{\"x\":478,\"y\":188},{\"x\":486,\"y\":163},{\"x\":489,\"y\":136},{\"x\":477,\"y\":112},{\"x\":456,\"y\":97},{\"x\":425,\"y\":90},{\"x\":171,\"y\":91},{\"x\":147,\"y\":98},{\"x\":135,\"y\":118},{\"x\":131,\"y\":141},{\"x\":131,\"y\":362},{\"x\":131,\"y\":379},{\"x\":118,\"y\":390},{\"x\":105,\"y\":379},{\"x\":102,\"y\":361},{\"x\":100,\"y\":105}]]\ninitalMaps(maps);\n","description":null,"note":null,"status":"public","like_student_ids":[],"is_featured":false,"views":887,"hashid":"d5msgpm5","is_content_changed":false,"review_status":"unsubmitted","submitted_at":null,"reviewed_at":null,"advise":null,"is_deleted":false}