Surface Aging by Impacts Eric Paquette, Pierre Poulin, and George Drettakis In Graphics Interface 2001 Proceedings

Abstract

We present a novel aging technique that simulates the deformation of an object caused by repetitive impacts over long periods of time. Our semi-automatic system deteriorates the surface of an object by hitting it with another object. An empirical simulation modifies the object surface to represent the small depressions caused by each impact. This is done by updating the vertices of an adaptively refined object mesh. The simulation is efficient, applying hundreds of impacts in a few seconds. The user controls the simulation through intuitive parameters. Because the simulation is rapid, the user can easily adjust the parameters and see the effect of impacts interactively. The models processed by our system exhibit the cumulative aging effects of repetitive impacts, significantly increasing their realism.

Keywords

BibTeX entry

@InProceedings{Paquette:2001:SAI,
  author =       "Eric Paquette and Pierre Poulin and George Drettakis",
  title =        "Surface Aging by Impacts",
  booktitle =    "Graphics Interface 2001 Conference Proceedings",
  year =         "2001",
  pages =        "175--182",
}

Online version

Adobe PDF version, optimized for printing version (31Mb, uncompressed images) and optimized for web version (2.5Mb, compressed images, ).

Additional material

PowerPoint version of the presentation

Two images and some code from our system appear on the GI 2001 Proceedings cover (PDF, 1.3Mb). The synthetic trunk appears on the front cover while the synthetic door frame appears on the back cover. Code extracted from our system appears as light background on both the front and back cover.

Movie shown during the presentation. The movie shows real time use of our system (live capture of the computer screen output). The complete movie is divided in five sequences:

• sequence 1 (70Mb)
  Tool selection and adjustment, impacts, undo, object mesh.
• sequence 2 (33Mb)
  Many impacts on one click, impact incoming direction and location with respect to camera position and mouse cursor location, saving of impacts parameters.
• sequence 3 (8.4Mb)
  Selection of impacts target location and incoming direction with the use of a box and a cone.
• sequence 4 (4.2Mb)
  Playback of impacts parameters on a different model. The impacts were interactively applied on the first column model and their parameters saved in a file. With the new column model loaded, we load the impacts parameters and apply them, getting similar results on a different model.
• sequence 5 (22Mb)
  This sequence shows playback of the impacts applied on the stairs model presented in the paper. This shows the exact model and impacts as in the paper.