Creating radial menu for tablet

Hi
For a current Android only project I need to create a radial menu similar to the one used in this virtual Mustang AR application (10+ sec mark, LL corner)

https://vimeo.com/117261346

Can anyone point me to either relevant assets or tutorials to get me started?

Try parenting the 3 outer icons to the central gear icon and rotate them in increments of 45 deg. around the z axis, and then disable them. When the menu is supposed to be expanded, enable them and translate them along the y axis either by scripting or animations. Repeat this process for additional nested sub menus.