Use linear interpolation for flights with only two control points (only the height varies).
Use linear interpolation for flights with only two control points (only the height varies).

denverpierce/cesium,jason-crow/cesium,hodbauer/cesium,likangning93/cesium,denverpierce/cesium,oterral/cesium,jason-crow/cesium,likangning93/cesium,ggetz/cesium,YonatanKra/cesium,jason-crow/cesium,AnimatedRNG/cesium,wallw-bits/cesium,kaktus40/cesium,AnalyticalGraphicsInc/cesium,omh1280/cesium,kiselev-dv/cesium,aelatgt/cesium,emackey/cesium,wallw-bits/cesium,CesiumGS/cesium,aelatgt/cesium,AnimatedRNG/cesium,YonatanKra/cesium,kiselev-dv/cesium,soceur/cesium,esraerik/cesium,hodbauer/cesium,denverpierce/cesium,omh1280/cesium,likangning93/cesium,AnalyticalGraphicsInc/cesium,NaderCHASER/cesium,soceur/cesium,YonatanKra/cesium,NaderCHASER/cesium,YonatanKra/cesium,oterral/cesium,hodbauer/cesium,CesiumGS/cesium,wallw-bits/cesium,jasonbeverage/cesium,progsung/cesium,wallw-bits/cesium,AnimatedRNG/cesium,jason-crow/cesium,CesiumGS/cesium,ggetz/cesium,emackey/cesium,likangning93/cesium,progsung/cesium,aelatgt/cesium,kaktus40/cesium,esraerik/cesium,emackey/cesium,ggetz/cesium,denverpierce/cesium,likangning93/cesium,oterral/cesium,CesiumGS/cesium,josh-bernstein/cesium,NaderCHASER/cesium,jasonbeverage/cesium,CesiumGS/cesium,AnimatedRNG/cesium,emackey/cesium,esraerik/cesium,omh1280/cesium,esraerik/cesium,aelatgt/cesium,ggetz/cesium,geoscan/cesium,josh-bernstein/cesium,soceur/cesium,kiselev-dv/cesium,kiselev-dv/cesium,geoscan/cesium,omh1280/cesium