Geometric modeling based on triangle meshes
ACM SIGGRAPH 2006 Courses
Robust inside-outside segmentation using generalized winding numbers
ACM Transactions on Graphics (TOG) - SIGGRAPH 2013 Conference Proceedings
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In this paper, we propose a new method that can consistentlyorient all normals of any mesh (if at all possible),while ensuring that most polygons are seen with theirfront-faces from most viewpoints. Our algorithm combinesthe proximity-based with a new visibility-based approach.Thus, it virtually eliminates the problems of proximity-basedapproaches, while avoiding the limitations of previoussolid-based approaches.Our new method builds a connectivity graph of thepatches of the model, which encodes the "proximity" ofneighboring patches. In addition, it augments this graphwith two visibility coefficients for each patch. Based onthis graph, a global consistent orientation of all patches isquickly found by a greedy optimization.We have tested our new method with a large suite of models,many of which from the automotive industry. The resultsshow that almost all models can be oriented consistentlyand sensibly using our new algorithm.