Draw Calligraphy in the Air

Project “SHAN SHUI” which is combined processing and physical computing together . My Idea is create Calligraphy effects in processing , then project on the wall or some flat canvas and use brush drawing on the surface of the wall . then calligraphy effects will show up by tracing on the brush.

the processing part:
last night , I spent 4 hrs to figure out how to connect dots in order to make brush stork smooth. here is the result.