Question

我有一个汽车游戏，只能沿着x和z轴行驶。如果汽车驶至正z（旋转== 0），则它必须做一些事情；如果汽车驶向正x（旋转== 90），则它必须做其他事情，依此类推。

<script>
        $(document).ready(function() {
            $('#companies-index-table').DataTable({
                serverSide: true,
                processing: true,
                responsive: true,
                    ajax: "{{ route('admincompanies.datatables') }}",
                columns: [
                    { name: 'id' },
                    { name: 'name' },
                    { name: 'created_at' },
                    { name: 'updated_at' },     <-- I was missing this line so my columns didn't match the thead section.
                    { name: 'count', orderable: false },
                ],
            });
        });
    </script>

它适用于北部和东部，但不适用于南部和西部。即使我以旋转== -180 ||的汽车来启动程序180。我究竟做错了什么？谢谢！

Answer 1

You need to use non-negative value, as the documentation states, it must be between 0 and 360.

if (transform.rotation.eulerAngles.y == 180)
{
    richtung = 2;
    Debug.Log("south");
}

if (transform.rotation.eulerAngles.y == 270)
{
    richtung = 3;
    Debug.Log("west");
}

You had the third case almost right, but unfortunately you used transform.rotation.y instead of transform.rotation.eulerAngles.y.

As @Everts pointed out, it would be better to compare the values with a "epsilon" value, because float and double are not perfectly precise (because of the format in which they are stored in memory).

Math.Abs(transform.rotation.eulerAngles.y - 180) < 0.001

Answer 2

由于您仅将车辆设置为四个方向，因此您可以同时设置更多方向。

让我们考虑使用A和D键旋转车辆，并且车辆从richtung = 0开始。

public enum Direction { North, East, South, West }
public Direction VehicleDirection{ get{ return (Direction)richtung; } } 
private int richtung = 0;
void Update()
{
    if(Input.GetKeyDown(KeyCode.A))
    {
        if(++richtung == 4){ richtung == 0; }
    }
    else if(Input.GetKeyDown(KeyCode.D))
    {
       if(--richtung < 0){ richtung == 3; }
    }
}

现在您无需关心轮换，因为您现在可以使用richtung的价值进行轮换。在其他任何地方，您都可以使用VehicleDirection来更明确地指示其前进的方向。

EulerAngles在if语句中无法在某些值下正常运行C＃

2 个答案: