working on measuring the distance of two points along the surface of an object. gotten to the part where i can calculate the distance between two points. however if the surface is not flat, that does not really work. This is where i am right now. the line seems to be hovering over the surface… any …

you need to use some path finding lib. maybe like donmccurdy’s lib - there instead of navigation mesh you would need to find the path on your actual mesh and sum the path segment lengths up. I have also simpler and faster path finder here but unlike donmccurdy’s this one only calculates the path alo…

looking at the pdf linked from your link, I dont think “geodesics” would be a good idea for finding a distance: [Screenshot 2023-07-01 at 04-58-05 You Can Find Geodesic Paths in Triangle Meshes by Just Flipping Edges - flip_geodesics.pdf]

That image specifically is showing retaining the line wrapping around the cylinder 5 times and optimizing the path. I believe you need to start with a reasonable initial path but if you want a path pulled “taut” along the surface this is the kind of thing you need.

If this is just more of a nice-to-have helper and only for surfaces where the user picks a reasonable connected area without holes,gaps or too heavy concave surfaces you could so do this by plotting sample points with a raycaster from start to end. Positioning the raycaster at the bounding sphere r…

Surface measurement - help

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gkjohnson July 1, 2023, 2:13am 3

Afaik there’s nothing out of the box to support this with any kind of exactness but there are effective algorithms out there for measuring this that you can implement. See here:

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Surface measurement - help

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