a light at the position specified by azimuth and elevation. az is
the azimuthal (horizontal) rotation and el is the
vertical elevation (both in degrees). The interpretation of azimuth
and elevation is the same as that of the view command.
light_handle = lightangle(az,el) creates
a light and returns the handle of the light in light_handle.
the position of the light specified by light_handle.
[az,el] = lightangle(light_handle) returns
the azimuth and elevation of the light specified by light_handle.
h = light;
for az = -50:10:50
By default, when a light is created, its style is infinite.
If the light handle passed in to lightangle refers
to a local light, the distance between the light and the camera target
is preserved as the position is changed.