Deformation Transfer in ANSI C

What’s This?

This is an implementation of Deformation Transfer algorithm in ANSI C, which could transfer the deformation of one triangle mesh to another. Check this paper (http://people.csail.mit.edu/sumner/research/deftransfer/Sumner2004DTF.pdf) for detailed explaination of this algorithm and here (http://people.csail.mit.edu/sumner/research/deftransfer/) for demonstrations and mesh data.

Compile

You need CHOLMOD (http://www.cise.ufl.edu/research/sparse/cholmod/) and UMFPACK (http://www.cise.ufl.edu/research/sparse/umfpack/) to compile it, drop the header files and libs to the ./external folder if you’ve compiled them on your own, or just try the precompiled version in this repository.

After these libs has been set properly, type make to build them all.

Try A Shakedown Run

Run sample_run.sh in bin directory, the resulting deformed target model would be shown by our corrstool. The calculation takes about one minute or so (resolving corresponence and deforming 10 models).

You can read the comments in sample_run.sh to see how to apply these tools to your own .OBJ models.

Usage of Corrstool

Correspondence phase: You need to pick up a small set of marker points to specify the semantic correspondence between the source model and the target model, we provided a tool here (corrstool), you can launch it using

./corrstool source_model target_model

for example, running this command in bin directory

./corrstool horse_ref.obj camel_ref.obj

would open a window showing the source model at the left panel and target model at the right panel, drag your mouse with left mouse button pressed to view the model in a different angle (it would change the view angle of the two panels simutanously), and drag with right mouse button pressed to zoom the view.

You can move the cursor to somewhere in the model you want to mark and press P to mark this point, after having specifed marker points on both models, press A to “commit” this point pair to correspondence list, if you hit A by mistake, just hit U (undo) to recover from that.

The points you picked up may not right on where your cursor pointed to, this is because of marker points can only appear on vertices of the mesh model, you can view models in wired mode by pressing M, and strike it again to get back to solid mode. If you want to switch to another point on the same piece of triangle, just hit C many times until you get what you want.

After all marker points has been specified, press W to write the correspondence to a .cons file (default.cons by default).