Celestia/Celx Scripting/CELX Lua Methods/CEL command chase
chase
[edit | edit source]chase { }
Tells Celestia to set the active Coordinate System to chase, which chases the currently selected object through space.
The command has no arguments.
CELX equivalent-1:
Based on the observer:setframe() method.
- Find the target object with name <string> to be chased and store in "objectname".
objectname = celestia:find( <string> )
- Create new frame of reference to chase with "objectname" as reference object and store in "frame".
frame = celestia:newframe("chase", 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("chase", objectname)
obs = celestia:getobserver()
obs:setframe(frame)
CELX equivalent-2:
Based on the observer:chase() method.
- Find the target object with name <string> to be chased and store in "objectname".
objectname = celestia:find( <string> )
- Get observer instance of the active view and activate chase-mode on "objectname".
Chase-mode is the same as setting the frame of reference to chase with objectname as reference object.
obs = celestia:getobserver() obs:chase(objectname)
Summarized:
objectname = celestia:find( <string> ) obs = celestia:getobserver() obs:chase(objectname)
Example:
The following example selects the Moon, sets the Coordinate System to chase, and then goes to the Moon:
CEL:
select { object "Sol/Earth/Moon" }
chase { }
goto { time 2 }
wait { duration 2 }
CELX-1 with observer:setframe() method:
moon = celestia:find("Sol/Earth/Moon")
celestia:select(moon)
frame = celestia:newframe("chase", moon)
obs = celestia:getobserver()
obs:setframe(frame)
obs:goto(moon, 2.0)
wait(2.0)
CELX-2 with observer:chase() method:
moon = celestia:find("Sol/Earth/Moon")
celestia:select(moon)
obs = celestia:getobserver()
obs:chase(moon)
obs:goto(moon, 2.0)
wait(2.0)