Comments (1)
@marcelotten thanks for reaching out.
This is not as easy as it may seem at first. You need to do some spherical geo calculations to get to the result you're looking for.
Simplifying the question, if all that was needed was to get the percentual coordinates of a location along the great circle arc between just two points, I would suggest to use d3-geo's geoInterpolate.
For your case you could build on top of that for the two layers. For arcs the above method should work, you just need to then also interpolate the altitude, along a curved line. In the component's case we use a cubic bezier curve that start and end on the ground. You can find the inner code here, if it helps:
https://github.com/vasturiano/three-globe/blob/7242049d9ee19de7e446a6cb44aa180e7e37d8ab/src/layers/arcs.js#L279-L281
For paths, it's not as easy. But the good news is that you have all the coordinates of the points already on your side. So depending on the complexity of your paths, you can perhaps already calculate a good approximation by using the geoInterpolate
function above.
from globe.gl.
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from globe.gl.