func CameraFOV(points []ln.Vector, eye, center ln.Vector) float64 {
var result float64
c := center.Sub(eye).Normalize()
for _, point := range points {
d := point.Sub(eye).Normalize()
a := math.Acos(d.Dot(c))
result = math.Max(result, a)
}
return ln.Degrees(result * 2 * 1.2)
}
