移动 object 和 _camera.TransformDirection(moveDirection)

Question

我正在使用这个简单的功能移动游戏 object，移动 body 取决于相机视图。唯一的问题是相机 X 旋转不是 0 并且 body 试图移动到地面但不能向前清除并且移动缓慢

void VerySimpleMove()
{
    if (_controllerBody.isGrounded)
    {
        _moveDirection.x = _mj.GetAxis("Horizontal");
        _moveDirection.y = 0;
        _moveDirection.z = _mj.GetAxis("Vertical");                  

        _moveDirection = _camera.TransformDirection(_moveDirection); 
        if (Mathf.Abs(_moveDirection.x) > 0 || Mathf.Abs(_moveDirection.y) > 0)
        {
            _body.rotation = Quaternion.LookRotation(_moveDirection);
        }
        if (_jumpButton)
        {
            _jumpButton = false;
            _moveDirection.y = _jumpHeight;
        }
    }
    _moveDirection.y -= _gravity * Time.deltaTime;
    _controllerBody.Move(_moveDirection * Time.deltaTime);
}

如何将 _moveDirection 旋转 _camera.eulerAngle.x 使其真正向前？

Answer 1

如果我没理解错的话，你需要确保_moveDirection总是平行于XZ平面。一种方法是不使用 _camera.TransformDirection 来计算相机前向矢量在 XZ 平面上的投影，然后在该方向使用 LookRotation，如下所示：

var forward = _camera.transform.forward; // Get camera forward vector
forward.y = 0; // Project it on XZ plane
_moveDirection =  Quaternion.LookRotation(forward) * _moveDirection; // Rotate

请注意，简单地按建议的相机 X 角度旋转对象并不总是有用，因为相机 Z 角度会产生相同的效果。

所以最终代码是：

void VerySimpleMove()
{
    if (_controllerBody.isGrounded)
    {
        _moveDirection.x = _mj.GetAxis("Horizontal");
        _moveDirection.y = 0;
        _moveDirection.z = _mj.GetAxis("Vertical");                  

        var forward = _camera.transform.forward; // Get camera forward vector
        forward.y = 0; // Project it on XZ plane
        _moveDirection =  Quaternion.LookRotation(forward) * _moveDirection; // Rotate
        if (Mathf.Abs(_moveDirection.x) > 0 || Mathf.Abs(_moveDirection.y) > 0)
        {
            _body.rotation = Quaternion.LookRotation(_moveDirection);
        }
        if (_jumpButton)
        {
            _jumpButton = false;
            _moveDirection.y = _jumpHeight;
        }
    }
    _moveDirection.y -= _gravity * Time.deltaTime;
    _controllerBody.Move(_moveDirection * Time.deltaTime);
}

移动 object 和 _camera.TransformDirection(moveDirection)

move object and _camera.TransformDirection(moveDirection)

c#

unity3d

game-physics