Integrate RGL viewer (instead of pop-up)

[annakrystalli]

Done but slow. See https://github.com/dmurdoch/rgl/issues/4

Options:

• Asynchronous processing with promises package is the first thing I considered (https://rstudio.github.io/promises/articles/shiny.html) but that still means the loading of the scene is slow, it just doesn't make the rest of the page hang.
• Adding to scene in the browser: The coordinate data is a 4MB 3D array that, upon species selection, is subset and the species beak added to to the scene. It feels like I'd want to do the sunsetting on the server, send the beak data to the browser and let the browser add it to the scene? R can communicate with JavaScript through shiny https://shiny.rstudio.com/articles/communicating-with-js.html, I'm just not confident about the JavaScript element. Another useful resource: https://blog.r-hub.io/2020/08/25/js-r/

[annakrystalli]

So! In the end there was a much simpler fix to the problem! Due to some data reshaping required before plotting each beak, the original code was extracting and rendering each segment of each beak (75 for each) individually in a for loop, effectively running the most expensive function 75 times per beak.

Can't believe I missed that! 🙈 . In any case I know all the beak coordinates first and then render the whole beak in a single segments3d, and it's as fast as! No fancy methods required! 🎉