Lat,Lng to viewport Pixel

Hey Guys,

I am trying to figure out how to convert a latitude, longitude point to a view port pixel. I figured out the other direction from pixel to lat, lng easily enough but I am having a challenge figuring this out. Any help would be greatly appreciated. Also if anyone knows off hand how to convert a traditional 2D web zoom (such as that used on google) to a height in meters, that would also be appreciated.

Thanks so much ahead of time.

I found it for anyone searching, Cesium.SceneTransforms.wgs84ToWindowCoordinates(scene, cartesian3)