设置玩家速度，用 bukkit 将其从 A 点发射到 B 点

Question

我正在尝试为服务器编写一个插件，我想从 A 点到 B 点启动一个播放器。

我已经尝试过这个，但很多时候它不准确，并且会错过几个街区。

 private  Vector calculateVelocity(Location fromLoc, Location toLoc, int heightGain) {
    Vector from = fromLoc.toVector();
    Vector to = toLoc.toVector();

    //Block locations
    int endGain = to.getBlockY() - from.getBlockY();
    double horizDist = fromLoc.distance(toLoc);

    //Height gain
    int gain = heightGain;
    double maxGain = (gain > (endGain + gain) ? gain : (endGain + gain));

    //Solve quadratic equation for velocity
    double a = -horizDist * horizDist / (4 * maxGain);
    double b = horizDist;
    double c = -endGain;
    double slope = -b / (2 * a) - Math.sqrt(b * b - 4 * a * c) / (2 * a);

    //Vertical velocity
    double veloY = Math.sqrt(maxGain * 0.115);

    //Horizontal velocity
    double vH = veloY / slope;

    //Calculate horizontal direction
    int distX = to.getBlockX() - from.getBlockX();
    int distZ = to.getBlockZ() - from.getBlockZ();
    double mag = Math.sqrt(distX * distX + distZ * distZ);
    double dirX = distX / mag;
    double dirZ = distZ / mag;

    //Horizontal velocity components
    double veloX = vH * dirX;
    double veloZ = vH * dirZ;

    //Actual velocity
    Vector velocity = new Vector(veloX, veloY, veloZ);

    return velocity;
}

关于我应该做什么才能使其 100% 准确，有什么建议吗？

Answer 1

您可以使用以下代码：

if (commandSender instanceof Player) {
    Player player = (Player) commandSender;
    Location from = player.getLocation();
    Location to = new Location(player.getWorld(), player.getLocation().getX() + 4, player.getLocation().getY(), player.getLocation().getZ() + 4);

    player.setVelocity(new Vector(from.getX() - to.getX(), from.getY() - to.getY(), from.getZ() - to.getZ()));
}

只需将

Location to

变量替换为您需要投掷玩家的坐标即可。