Implemented partial and approximate symmetry detection for 3D point clouds and integrated it into
XGRT.
Based on Niloy J. Mitra et al., "Partial and Approximate Symmetry Detection for 3D Geometry" (2006).
Implemented example-based texture synthesis, using principal component analysis for nearest-neighbor searches.
Based on Vivek Kwatra et al., "Texture Optimization for Example-based Synthesis" (2005).