在 3D 空间中旋转和平移相机
我在 3D 空间中平移和旋转相机时遇到了一些小问题。在 Direct3D9 中，相机被定义为位置轴、观察轴和上轴（作为 3d 向量）。因此，我存储了相机的旋转和位置，并且在为新帧定义相机时，我通过旋转旋转了观察向量和上轴并设置了位置。当平移相机时，我进行了平移，通过旋转来旋转它，并通过该平移来平移相机的位置和观察向量。但一段时间后，观察向量和新的平移不再对齐——也就是说，当平移向量是定义向前的原始观察向量的正倍数时，相机不再向前移动。我不明白为什么会发生这种情况 - 有什么建议吗？
I'm having a slight problem translating and rotating my camera in 3D space. In Direct3D9 a camera is defined as position, looking at, and up axis (as 3d vectors). So I stored the camera's rotation and position, and when defining the camera for a new frame, I rotated the looking at vector and up axis by the rotation and set the position. When translating the camera, I took the translation, rotated it by the rotation and translated the camera's position and looking-at vector by that. But after some time the looking-at vector and the new translation don't line up - that is, the camera no longer moves forwards when the translation vector is a straight multiple of the original looking-at vector which defines forwards. I can't understand why this occurs- any suggestions?
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您是否遇到过万向节锁？我以前也遇到过这种情况，所以我转储了向量并移至 四元数。
Could you be experiencing Gimbal Lock? This has occurred to me before and so I dumped vectors and moved to Quaternions.