.:Prototypical realisation of a 3d sculpturing system
• degree examination work • fhtw-berlin.de •

abstract:

3d sculpturing is still a research topic. The presented system uses an octree data structure which is represented by polygonal cubes located in the graphics device to shape a volumemodel. The user can interactive scuplt the octree by just eliminating different sized cubes from the octree. The gained volumemodel could be transformed to a real surface reprensantation by the marching cubes algorithm. There a 2 kinds of views supported (Octree rendering/ polygonal mesh). The user could define how precise the octree gets sampled(e.g. 10 means 10*10*10 voxel). Other features are a persitent volumemodel and .obj file export.

Sculpturing is provided in both views (mesh and voxel represantation). The system updates the mesh view instantly for sample values < 30 (voxel array with a side length of < 30 Voxel). With rising sample rate the poly mesh converges to the octree. Refering to the use of a voxel represantation the system allows you to shoot holes straight through the model.

The following images show: the gui with an example model, a cross as test model in different triangulation resolutions, inverting a model and of course a kind of teapot.

future prospects:
-rebuild from ground up (instead of hundreds of hours of optimizing work)
-fracture of existing polygonmeshes
-deforming engine

I like to say thank you to Prof. Dr. Thomas Jung FB4 FHTW-Berlin for his support during my degree examinations.