At Propeller we’ve found that the battle tested Cesium math classes can be useful for various applications outside of a Cesium viewer. e.g. NodeJS server side computation and rendering, in-house libraries that require some vector math etc. Pulling in Cesium as a dependency can be reasonably heavy (currently 90MB) which inevitably provides a lot of functionality that remains unused. It also ties in to the monthly Cesium versioning, where the core math classes in practice change infrequently.
To address this, and to help in space constrained environments (like AWS Lambda) we have developed an in-house compact library that is a drop in replacement for a subset of Cesium functionality and uses semantic versioning. At the moment it is already useful in providing functionality like…
BoundingRectangle
Cartesian2/3
Cartographic
CesiumMath
Color
Ellipsoid
GeographicProjection
HeadingPitchRoll
Intersect
Matrix3/4
Quaternion
Rectangle
WebMercatorProjection
WebMercatorTilingScheme
Is this problem unique to us? Is anyone else doing similar? What is the level of interest in some sort of solution either managed by the Cesium team as part of the CesiumJS project, or open sourced by a 3rd party (e.g. Propeller)?