I am doing this short film where the actor draws line on the wall.. we could not get permission to draw lines on the wall and we are trying to use commotion to do the trick.. only thing is we cannot figure out how to this using the track data... is there anyone who can help me on this please..
you can take a look at a rough at at http://kanzo.voodoohosting.com/~fazail/amaze/cut3.mov
I would just do the write-on flat, render it, then corner-pin this onto your walls. Or do it flat and have boujou 3D track it in.
Instead of trying to free-hand it in Commotion, you should create your text in an app like Photoshop, black text on a white BG (or white on black). The in Commotion figure out how long you want the write-on to be, and make a new clip this duration, same color as the BG from the text file (black or white). Then use the superclone brush with the overlay on and trace your type into this new clip. When you are done, delete this frame, then autopaint over time. When this writeon is finished, save the clip. Then bring this back in and use it as a trackmatte for your cornerpin.
I have found that doing write-ins like this lately on the mac is buggy. It takes a few times for it to write on correctly. I have also found that after recording the stroke, sometimes it is better to then make a new blank clip to write it onto.
If this is confusing, I cover it in my Commotion Complete DVD's, forever on blowout sale at http://www.toolfarm.com.
i guess i should clear it a bit more.. although i have said a writeon its kind of different... my actor is drawing these lines on the wall and the camera dollies with her in some of the shots.. i cannot do a frame by frame drawing because the line has to exist on all frames as it gets drawn (unless i guess i do a onion skin or do a pain on all frames from each little stroke).. i was able to track the pen she was carrying.. the only thing i want to do now is for a line to be drawn from the start of the track data to the end so basically it will look like its been drawn... thanks
Can you post the shot you are talking about... I do not have time to wade through a whole film.
If you have two trackers, you can apply the tracker data using scale and rotation to your paint stroke. Select the tracker icon in the autopaint palette, then choose your pan tracker for position and the other for scale and rotation.
OK... now it makes sense. I don't think that autopaint and tracking will work. I just did a little test, and it ends up looking like she is pulling on string. The stroke does not stick to the wall, and floats and rotates.
I would do it like I initially said with a corner pin comp. Make the stroke initially the full path, then you will need to hand keyframe a wipe right at her pen.