block a-boxes in a semicircle
data-driven positions using the index value of the datum in the blocks data
all the blocks with thumbnail images created during the 2016 #d3unconf
here we use aframe’s a-boxes, which are kind of like SVG rects
a fork of aframe + d3 + bl.ocks from @donrmccurdy
falling blocks brought to you by the aframe-physics-system, also from @donrmccurdy
inspired by the conversations at the 3d and VR 11am session in the Alcatraz Room at the 2016 d3 unconference