在 Unity 5 中更改相机（Oculus Rift）位置答案

【问题标题】：Changing Camera (Oculus Rift) Position in Unity 5在 Unity 5 中更改相机（Oculus Rift）位置
【发布时间】：2015-08-18 12:41:06
【问题描述】：

使用Unity 5.1 和Oculus SDK 0.6 以及新的内置Virtual Reality Supported 复选框，我似乎无法更改相机在VR 中的位置。

当然，我可以更改相机的Tranform Position 组件编号（即x 和y 和z），但是当我在播放模式下运行时，很明显Oculus 的视觉相机 没有移动。

如何移动/更改 Oculus 的视角，以调整通过 2 个镜头看到 Unity 世界的方式？

【问题讨论】：

标签： unity3d oculus virtual-reality

【解决方案1】：

将父 GameObject 添加到相机并移动那个，不要修改 VR 相机。

【讨论】：

感谢 ChanibaL。当您选中Virtual Reality Supported 选项时，每个新项目附带的Main Camera 是否与Oculus 使用的相机相同？ VR相机是什么意思？由于消除了OVR 预制件等...当您勾选 Unity VR 框时，我很困惑实际发生了什么（例如相机方面）。你能解释一下吗？谢谢
与OVRCamera 预制件发生的事情几乎相同，只是您无法在编辑器中控制它。惭愧，真的。不确定在类似的层次结构中是否有运行时添加的游戏对象（每只眼睛的相机等）。如果您还没有，请查看the official docs。

【解决方案2】：

扩展 Krzysztof 的回答，我通常使用这样的东西（我将此组件附加到 VR 相机，给它一个空的游戏对象作为父对象，然后将该游戏对象设置为 vrCameraHolder）：

[RequireComponent(typeof(Camera))]
public class VRPlayer : MonoBehaviour
{
    // set to be the parent of this object
    public Transform vrCameraHolder;

    // simple utility functions
    public static Quaternion LocalToWorldRotation(Transform t, Quaternion localRot)
    {
        return t.rotation * localRot;
    }
    public static Quaternion WorldToLocalRotation(Transform t, Quaternion rot)
    {
        return Quaternion.Inverse(t.rotation) * rot;
    }

    // Gets the body part position in world space
    public Vector3 GetBodyPartPosition(UnityEngine.XR.XRNode bodyPart)
    {
        return vrCameraHolder.localToWorldMatrix.MultiplyPoint(UnityEngine.XR.InputTracking.GetLocalPosition(bodyPart));
    }

    // Gets the body part rotation in world space
    public Quaternion GetBodyPartRotation(UnityEngine.XR.XRNode bodyPart)
    {
        return LocalToWorldRotation(vrCameraHolder, UnityEngine.XR.InputTracking.GetLocalRotation(bodyPart));
    }

    // moves entire player body so that this becomes true
    public void SetBodyPartPosition(UnityEngine.XR.XRNode bodyPart, Vector3 pos)
    {
        Vector3 bodyPartPos = vrCameraHolder.localToWorldMatrix.MultiplyPoint(UnityEngine.XR.InputTracking.GetLocalPosition(bodyPart));
        vrCameraHolder.position += pos - bodyPartPos;
    }


    // if you want to change rotation you should probably only use this to keep the headset tilted the same way (y axis is up, so 0 is forward along x axis, 180 is backwards along x axis, 90 and 270 are along z axis, etc.)
    public void SetBodyPartYRotation(UnityEngine.XR.XRNode bodyPart, float yRot)
    {
        Vector3 curRot = GetBodyPartRotation(bodyPart).eulerAngles;
        SetBodyPartRotation(bodyPart, new Vector3(curRot.x, yRot, curRot.z));
    }

    // rotates entire player body so that this becomes true (but doesn't change position)
    public void SetBodyPartRotation(UnityEngine.XR.XRNode bodyPart, Quaternion rot)
    {
        Quaternion curWorldRot = GetBodyPartRotation(bodyPart);
        Quaternion cancelOutWorldRot = Quaternion.Inverse(curWorldRot);
        float angle1;
        Vector3 axis1;
        cancelOutWorldRot.ToAngleAxis(out angle1, out axis1);
        Vector3 bodyPartPosition = GetBodyPartPosition(bodyPart);
        vrCameraHolder.RotateAround(bodyPartPosition, axis1, angle1);
        // now player rotation = not rotated
        float angle2;
        Vector3 axis2;
        rot.ToAngleAxis(out angle2, out axis2);
        vrCameraHolder.RotateAround(bodyPartPosition, axis2, angle2);
    }

    // rotates entire player body so that this becomes true (but doesn't change position)
    public void SetBodyPartRotation(UnityEngine.XR.XRNode bodyPart, Vector3 eulerAngles)
    {
        SetBodyPartRotation(bodyPart, Quaternion.Euler(eulerAngles));
    }
}

【讨论】：