Info - Keep latlong with triangle data
Closed this issue · 2 comments
I see the latlong is generated, converted to cartesian and then to stereographic.
How should I link and retain the triangle vertex latlong data?
I want to pair this with topojson for interaction.
Sorry, my code is messy :-(
The link is the indices in the array. The data is kept in the same order in all the different representations (a_latlong, r_xyz, r_XY).
When you read the data from Delaunator, it tells you the point id i, so you can use that to look up lat, long in a_latlong.
The generateFibonacciSphere function constructs a_latlong as an array. Point i is at {lat: a_latlong[2*i], long: a_latlong[2*i+1]}. It is stored as a flat array for efficiency and also for Delaunator. In stereographicProjection, point i is at {x: r_XY[2*i], y: r_XY[2*i+1]}.
Thank you for your help!