aw_Triangulator is powerful After Effects script that creates Delaunay triangulation effect using position from selected layers and has some nice additional features.  

Features

• Animate Masks inside After Effects using built-in tracker
• Break Masks into vertices using “Null” layers
• Create triangulation effect (triangles via Shape Layers).
• Clone custom layer using positions from selected layers.
• Additional panel for batch add / customize expressions throught all selected layers