on the disk drive memory associated with the computer executing the present software for instance the default file name is hard coded to be u201c viper_path u201d and is located in the same directory where the main mc file is located that is the environment variable pointing to the directory of the current shot in film terminology in a normal session the animator will keep open on screen a second curve editing window which will contain a world file of the current shot as integral part of curve editing session the animator can import the world file from the temporary directory where it was initially created if this file was added to the shot the temporary directory will contain the world file and it can now be loaded into the u201c viper_path u201d file u201c read_path u201d is no longer responsible for making a decision whether or not to read a new path from disk or rebuild a path from scratch it used to turn the current path persistence to u201c on u201d using curve persistent setting routine thereby u201c read_path u201d is no longer affecting the curvature of the existing animated path 2 the u201c edit_path u201d will load the curve editor from the switches editor control screen shown in fig1 the animator can then edit the loaded mc file after he is done editing the newly modified curve file must be saved from within the curve editor before trying to read the file back into the path using u201c read_path u201d button in one embodiment the only information that is read from the file is world space coordinates.