示例自动移动代码

function autoMoveSnake() {
    const head = snake[0];

    // 1. 朝食物移动
    if (food.x > head.x && velocity.x === 0) {
        velocity = { x: 1, y: 0 }; // 向右
    } else if (food.x < head.x && velocity.x === 0) {
        velocity = { x: -1, y: 0 }; // 向左
    } else if (food.y > head.y && velocity.y === 0) {
        velocity = { x: 0, y: 1 }; // 向下
    } else if (food.y < head.y && velocity.y === 0) {
        velocity = { x: 0, y: -1 }; // 向上
    }

    // 2. 规避碰撞
    const nextX = head.x + velocity.x;
    const nextY = head.y + velocity.y;

    if (
        nextX < 0 || nextX >= tileCount || nextY < 0 || nextY >= tileCount ||
        snake.slice(1).some(segment => segment.x === nextX && segment.y === nextY)
    ) {
        if (velocity.x !== 0) {
            if (head.y > 0 && !snake.some(segment => segment.x === head.x && segment.y === head.y - 1)) {
                velocity = { x: 0, y: -1 };
            } else {
                velocity = { x: 0, y: 1 };
            }
        } else if (velocity.y !== 0) {
            if (head.x > 0 && !snake.some(segment => segment.x === head.x - 1 && segment.y === head.y)) {
                velocity = { x: -1, y: 0 };
            } else {
                velocity = { x: 1, y: 0 };
            }
        }
    }
}

setInterval(autoMoveSnake, 100);
            

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