Celestia/Celx Scripting/CELX Lua Methods/CEL command lookback

lookback lookback { } Change the current camera view by 180 degrees (like a rear-view mirror). The command has no arguments. CELX equivalent: Based on the observer:rotate() method. Define the axis up_vector for rotation and store in "up_vec". up_v = celestia:newvector(0,1,0) Create new rotation around "up_vec" axis by 180 degrees = math.pi = 3.14159265 radians and store in "lookback". lookback = celestia:newrotation(up_v, math.pi) Get observer instance of the active view and rotate observer according the new created rotation "lookback". obs = celestia:getobserver() obs:rotate(lookback) Summarized: up_v = celestia:newvector(0,1,0) lookback = celestia:newrotation(up_v, math.pi) obs = celestia:getobserver() obs:rotate(lookback) Example:See the above CELX equivalent also as the CELX example for CEL: lookback { }. CEL: lookback { } CELX with the observer:rotate() method: up_v = celestia:newvector(0,1,0) lookback = celestia:newrotation(up_v, math.pi) obs = celestia:getobserver() obs:rotate(lookback) Back to CEL command index