Visualizing Segments with Light-Clock Diamonds (robphy)
This is the last of six GeoGebra files
(from my GeoGebra book Relativity on Rotated Graph Paper (robphy) - MAA2016 )
that were part of my MAA MathFest 2016 talk
"Introducing Spacetime Geometry: Relativity on Rotated Graph Paper".
http://www.maa.org/meetings/mathfest/program-details/2016/themed-contributed-paper-sessions
It describes aspects of my paper “Relativity on Rotated Graph Paper”, Am. J. Phys. 84, 344 (2016); http://dx.doi.org/10.1119/1.4943251.
An informal introduction is presented at
https://www.physicsforums.com/insights/relativity-rotated-graph-paper/
You can use my custom tool to decorate a segment from (say) event A to event B.
With the Light-Clock-Diamonds, it is easier to visualize the size of the segment (interpreted as the proper-time along a timelike segment or as the proper-length along a spacelike segment).
Check "graphpaper" to see the graph paper, which could be used to help draw these diamonds manually.
(See the paper for details.)