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    $\begingroup$ How do you want to define which way round the edge vectors are? (Which ones point at the points, which ones point away) $\endgroup$ Commented Aug 10, 2023 at 14:06
  • $\begingroup$ @RobinBetts Are you asking this so that each vertex has its own edge with a direction? It's fine if they follow the Y-axis for example, even if that creates a weird seam down the middle it would still be a big step forward. I hope I understood and answered your question right. $\endgroup$ Commented Aug 10, 2023 at 17:36
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    $\begingroup$ In this illustration the blue arrow points in the direction of vector, and the green arrow points in the direction abs(vector), This doesn't look like the relation you probably want. I think you have to come up with a definition of which end of an edge is at the start of your 'direction', and which end is at the end of it. Of course, I might be misunderstanding your intent. $\endgroup$ Commented Aug 10, 2023 at 17:39
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    $\begingroup$ @RobinBetts This set of edge data isn't all that useful, you're right. However my intended focus for this question was on converting edge data to point data. The actual edge data I want to convert to point data is different from the edge data on this page but the problem I'm experiencing is the same: I get the same checkered pattern or bad sampling. $\endgroup$ Commented Aug 10, 2023 at 20:41