Index
Boolean visible(source)
Return true if a given source is currently above the horizon.
- Arguments:
-
Source source
- The source of interest.
- Example 1:
- The following example shows one way to wait for a source to
rise, and stop waiting if the source has recently set.
until $visible(jupiter) | $setting(jupiter)
if($visible(jupiter)) {
...
}
- Context:
- A source is considered to be visible if its elevation is greater
than the horizon that was specified when the
horizon command was last invoked.
Martin Shepherd (4-Sep-2007)