set To Look At
fun setToLookAt(cameraLat: Angle, cameraLon: Angle, cameraAltMeters: Double, targetLat: Angle, targetLon: Angle, targetAltMeters: Double, vFov: Angle, aspect: Double, near: Double = 1.0, far: Double): Matrix4
Build the world-to-image matrix for a camera at (camera*) looking at (target*), with vertical vFov and image aspect = width/height.