Question

我正在使用称为Dreamteck样条线的资产来创建路径，我想做的是制作路径，因此当我旋转样条线时，在这种情况下，游戏对象粉红色立方体也会旋转，因此它的方向正确无论是上下颠倒还是像过山车一样侧滑。由于某种原因，我只能在立方体停止旋转以使其自身与路径对齐之前将路径旋转大约90度。 GIFF

if (Input.GetKey(KeyCode.W))
    {
        vehicle.transform.Translate(0, 0, speed * Time.deltaTime);

    }
    if (Physics.Raycast(vehicle.transform.position, Vector3.down, out hit, 100))
    {
        Vector3 surfaceNormal = hit.normal; // Assign the normal of the surface to surfaceNormal
        Vector3 forwardRelativeToSurfaceNormal = Vector3.Cross(vehicle.transform.InverseTransformDirection(vehicle.transform.right), surfaceNormal);
        Quaternion targetRotation = Quaternion.LookRotation(forwardRelativeToSurfaceNormal, surfaceNormal); //check For target Rotation.
        vehicle.transform.rotation = Quaternion.Lerp(vehicle.transform.rotation, targetRotation, Time.deltaTime * 20); //Rotate Character accordingly.

    }

Answer 1

我发现这可以实现我想要实现的目标：

 void Update()
{
    /*Here we get user input to calculate the speed the ship will get*/
    if (Input.GetKey(KeyCode.W))
    {
        /*Increase our current speed only if it is not greater than fwd_max_speed*/
        current_speed += (current_speed >= fwd_max_speed) ? 0f : fwd_accel * Time.deltaTime;
    }
    else
    {
        if (current_speed > 0)
        {
            /*The ship will slow down by itself if we dont accelerate*/
            current_speed -= brake_speed * Time.deltaTime;
        }
        else
        {
            current_speed = 0f;
        }
    }

    /*We get the user input and modifiy the direction the ship will face towards*/
    yaw += turn_speed * Time.deltaTime * Input.GetAxis("Horizontal");
    /*We want to save our current transform.up vector so we can smoothly change it later*/
    prev_up = transform.up;
    /*Now we set all angles to zero except for the Y which corresponds to the Yaw*/
    transform.rotation = Quaternion.Euler(0, yaw, 0);

    RaycastHit hit;
    if (Physics.Raycast(transform.position, -prev_up, out hit))
    {
        Debug.DrawLine(transform.position, hit.point);

        /*Here are the meat and potatoes: first we calculate the new up vector for the ship using lerp so that it is smoothed*/
        Vector3 desired_up = Vector3.Lerp(prev_up, hit.normal, Time.deltaTime * pitch_smooth);
        /*Then we get the angle that we have to rotate in quaternion format*/
        Quaternion tilt = Quaternion.FromToRotation(transform.up, desired_up);
        /*Now we apply it to the ship with the quaternion product property*/
        transform.rotation = tilt * transform.rotation;

        /*Smoothly adjust our height*/
        smooth_y = Mathf.Lerp(smooth_y, hover_height - hit.distance, Time.deltaTime * height_smooth);
        transform.localPosition += prev_up * smooth_y;
    }

    /*Finally we move the ship forward according to the speed we calculated before*/
    transform.position += transform.forward * (current_speed * Time.deltaTime);
}

Unity 3D如何旋转对象，使其基于地平面正确定向？

1 个答案: