Celestia/Celx Scripting/CELX Lua Methods/CEL command follow
follow
[edit | edit source]follow { }
This command tells Celestia to set the Coordinate System to ecliptical, and to follow the currently selected object.
The command has no arguments.
CELX equivalent-1:
Based on the observer:setframe() method.
- Find the target object with name <string> to be followed and store in “objectname”.
objectname = celestia:find( <string> )
- Create new frame of reference to ecliptic with "objectname" as reference object and store in "frame".
frame = celestia:newframe("ecliptic", objectname)
- Get observer instance of the active view and set the coordinate system of the frame of reference to "frame".
obs = celestia:getobserver() obs:setframe(frame)
Summarized:
objectname = celestia:find( <string> )
frame = celestia:newframe("ecliptic", objectname)
obs = celestia:getobserver()
obs:setframe(frame)
CELX equivalent-2:
Based on the observer:follow() method.
- Find the target object with name <string> to be followed and store in "objectname".
objectname = celestia:find( <string> )
- Get observer instance of the active view and activate follow-mode on "objectname".
Follow-mode is the same as setting the frame of reference to ecliptic with "objectname" as reference object.
obs = celestia:getobserver() obs:follow(objectname)
Summarized:
objectname = celestia:find( <string> ) obs = celestia:getobserver() obs:follow(objectname)
Example:
This example selects Mars, sets the Coordinate System to ecliptical (follow), and then travels to Mars.
CEL:
select { object "Sol/Mars" }
follow { }
goto { time 2 }
wait { duration 2 }
CELX-1 with observer:setframe() method:
mars = celestia:find("Sol/Mars")
celestia:select(mars)
frame = celestia:newframe("ecliptic", mars)
obs = celestia:getobserver()
obs:setframe(frame)
obs:goto(mars, 2.0)
wait(2.0)
CELX-2 with observer:follow() method:
mars = celestia:find("Sol/Mars")
celestia:select(mars)
obs = celestia:getobserver()
obs:follow(mars)
obs:goto(mars, 2.0)
wait(2.0)