3d camera center in data coordinates

Hi.

Same issue that the #5524 : https://github.com/plotly/plotly.js/issues/5524

It is impossible to fix the rotation point to a specific point to analyse data around this point.

Example : https://codepen.io/someuser12/pen/rNXLPRJ

The center is located at 0,0,0 in the layout (center of one of the sphere) but the rotation point is located at the middle of the graph at 500,0,0 (why ?)

If i change the center with the different button (for exemple fix it at x = 1000), the plot disappear to infinity and beyond.

Would be nice to have this feature to be able to navigate around a 3d system and analyse what happened.

In my case, we study (and plot) birds trajectories around wind turbine. We need to rotate around a specific point of the bird trajectory.

Regards

首先检查 issue #5524 和链接的 CodePen 示例，以复现 3D 相机的行为。根据复现结果追踪现有的 3D 相机实现；完成的标准是能够将旋转中心定位到指定的数据坐标点，同时绘图不会消失。