Image Cover Effect: Is it possible to force image to always "point" to the street? about mapillary-js

[oscarlorentzon]

@ivensgoncalves Thanks for the question.

There is currently no way to achieve achieve what you are asking for in a smooth way. With the Street camera controls the Viewer always centers the Viewpoint when moving to a new image.

It is possible to change the viewpoint non-smoothly programatically using the Viewer.setCenter method method (see the Viewer - Core Functionality - Viewpoint example), e.g. every time after a new image has been selected and the viewer has stopped moving (see the image and moveend events). For your use case I do not think that would result in a particularly nice behavior though. Also, with the Street camera controls active there is always the "risk" that it will bounce back towards the center depending on the undistortion model for the current image as well as the aspect ratio of the current image and the viewer container.

The proper solution (which is significantly more time consuming) is to add a new type of freer camera control that does not bounce towards the center of the image and maintains a lookat vector relative to the center of the image when transitioning between images. That camera control would be implemented as a new state next to the TraversingState which is the backing implementation for the Street camera controls.

[ivensgoncalves]

@oscarlorentzon Thank you for your detailed explanation.

I will try to follow your suggestion.