// 物体の落下距離計算
function freeFall(time, gravity = 9.8) {
    return 0.5 * gravity * time * time;
}

// 各時刻での位置を計算
for (let t = 0; t <= 5; t += 0.5) {
    const distance = freeFall(t);
    console.log(`時刻${t}秒: ${distance.toFixed(2)}m`);
}

function estimatePi(trials = 100000) {
    let insideCircle = 0;
    
    for (let i = 0; i < trials; i++) {
        const x = Math.random() * 2 - 1; // -1から1の乱数
        const y = Math.random() * 2 - 1;
        
        if (x * x + y * y <= 1) {
            insideCircle++;
        }
    }
    
    return 4 * insideCircle / trials;
}

console.log(`π ≈ ${estimatePi()}`); // 約3.14159...

function climateModel(co2_concentration, solar_input = 1361) {
    // シンプルな温室効果モデル
    const albedo = 0.3; // 反射率
    const absorbed_solar = solar_input * (1 - albedo) / 4;
    
    // CO2濃度による温室効果（単純化）
    const greenhouse_factor = 1 + 0.01 * Math.log(co2_concentration / 280);
    
    // 地表温度計算（ステファン・ボルツマン法則）
    const sigma = 5.67e-8; // ステファン・ボルツマン定数
    const temperature = Math.pow(absorbed_solar * greenhouse_factor / sigma, 0.25);
    
    return temperature - 273.15; // ケルビンから摂氏に変換
}

// 様々なCO2濃度での気温予測
[280, 350, 400, 450, 500].forEach(co2 => {
    const temp = climateModel(co2);
    console.log(`CO2: ${co2}ppm → 気温: ${temp.toFixed(1)}°C`);
});

class LifeGame {
    constructor(width, height) {
        this.width = width;
        this.height = height;
        this.grid = this.createGrid();
        this.nextGrid = this.createGrid();
    }
    
    createGrid() {
        return Array(this.height).fill().map(() => Array(this.width).fill(false));
    }
    
    countNeighbors(x, y) {
        let count = 0;
        for (let dx = -1; dx <= 1; dx++) {
            for (let dy = -1; dy <= 1; dy++) {
                if (dx === 0 && dy === 0) continue;
                const nx = x + dx;
                const ny = y + dy;
                if (nx >= 0 && nx < this.width && ny >= 0 && ny < this.height) {
                    if (this.grid[ny][nx]) count++;
                }
            }
        }
        return count;
    }
    
    nextGeneration() {
        for (let y = 0; y < this.height; y++) {
            for (let x = 0; x < this.width; x++) {
                const neighbors = this.countNeighbors(x, y);
                const alive = this.grid[y][x];
                
                if (alive && (neighbors === 2 || neighbors === 3)) {
                    this.nextGrid[y][x] = true;
                } else if (!alive && neighbors === 3) {
                    this.nextGrid[y][x] = true;
                } else {
                    this.nextGrid[y][x] = false;
                }
            }
        }
        [this.grid, this.nextGrid] = [this.nextGrid, this.grid];
    }
}