libigl file formats

• .dmat uncompressed ASCII/binary files for dense matrices
• .bf ASCII files for representing skeletal bone "forests"
• .tgf ASCII files for representing control handle graphs
• .off Geomview's polyhedral file format
• .obj Wavefront object file format. Usually unsafe to assume anything more than vertex positions and triangle indices are supported
• .mesh Medit's triangle surface mesh + tetrahedral volume mesh file format, see page 33, section 7.2.1
• .poly Piecewise-linear complex. This format comes in many similar but importantly different flavors: triangle's, tetgen's, pyramid/SVR's
• .node List of points (vertices). Described indentically (upto accepted dimensions, use of attributes and boundary markers) by Triangle, TetGen, and Stellar.
• .ele Element (triangle or tet) list. This format comes in similar flavors: tetgen's, stellar's, and triangle's. The formats of TetGen and stellar are identical upto conventions on index ordering and number of allowed attributes (unverified).
• .face TetGen's file format for simplicial facets.
• .tga Truevision TGA or TARGA image file format. IGLLIB supports only very basic reading and writing RGB/RGBA files without colormaps and (unverified) run-length compression.
• .png Portable Network Graphics image file. IGLLIB (in the libiglpng extra) supports png image files via the yimg library. Alpha channels and compression are suppported.