Hello, I am currently working on a Cesium project where I want to connect cities on the planet with polylines. This is quite easy when using the centerpoint of the city, however I need to have the lines end not at the center but rather on a virtual circle which defined the cities limits. So I’d ne…

Perhaps there’s another way to go about it. Determine total distance city to city, subtract from that distance the desired radius, then travel along that line only as far as that result distance to determine the point to draw to? https://cesium.com/docs/cesiumjs-ref-doc/EllipsoidGeodesic.html new …

Great! Thank you. That also helped my other question :slight_smile:

I’m glad that it helped! I suppose the other question was Geodesic related as well. EDIT: oh, this question! How to split a polyline in half

Here is a sandcastle in case anyone has the same question: <a href="https://sandcastle.cesium.com/#c=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" rel="nofollow noopener">:european_castle:

Neat example! I noticed you’re using explicit degree / radian conversions. You might like to know about Cartographic.fromDegrees() . (Also: Cartesian3.fromDegrees / .fromDegreesArray, Cesium.Math.toDegrees, etc.)

Thanks, using this sandcastle I just discovered that the interpolate function can extrapolate as well, I must have messed up when trying it before.

Find the intersection point of a polyline with a circle / sphere

CesiumJS

CarlCartesian July 10, 2020, 3:58pm 5

Here is a sandcastle in case anyone has the same question:

Ellipsoid Geodesic methods

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Find the intersection point of a polyline with a circle / sphere

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