Allow setting the camera "field of view"

It doesn't seem possible to set the 3D camera field of view (fov).

(Re: my post to Stackoverflow.)

Looking at the source code, I see that:

In https://github.com/plotly/plotly.js/blob/master/src/plots/gl3d/scene.js, it uses glPlot3d.createScene and sets the options in proto.prepareOptions.

In https://github.com/gl-vis/gl-plot3d/blob/master/scene.js#L179, the allowed options include the field-of-view parameter fovy (field-of-view in the vertical direction), which defaults to Math.PI/4 (45 degrees).

For 3D graphics, a 45-degree vertical field-of-view typically gives an exaggerated perspective. It corresponds to about a 28mm camera lens.

It would be nice for plotly.graph_objects.layout.scene.Camera to include a fovy parameter (in radians).

Commencez par la définition de layout.scene.Camera de plotly.py et suivez le cheminement des options de caméra jusqu’à plotly.js. Lisez src/plots/gl3d/scene.js, en particulier proto.prepareOptions, et comparez ses options avec celles de scene.js de gl-plot3d autour de la ligne 179. Le travail est terminé lorsque l’API de caméra Python accepte fovy en radians et le transmet à la scène 3D.