Open3DGC aims at providing a cross platform C++ implementation (under MIT License) of patent free MPEG tools for 3D graphics compression.
The current Open3DGC version provides an implementation of
the MPEG-SC3DMC codec (Scalable Complexity 3D Mesh Compression). SC3DMC offers an efficient low complexity solution to compress arbitrary
triangular 3D meshes with attributes (e.g., normals, texture coordinate, skinning
animation weights, bone IDs..).
A detailed description of the compression algorithm is available here
A detailed description of the compression algorithm is available here
Open3DGC supports two output stream types:
Compression Efficiency
- Binary streams: compressed using arithmetic encoding
- ASCII (7-bits) streams: adapted for server-side gzip compression and java-script client side decoding
Compression Efficiency
Open3DGC is 7.8 times more efficient than Gzip and
1.7-2.0 times more efficient than Webgl-loader and OpenCTM
- Test dataset: 160 models with various shapes and topologies (i.e., open/closed, manifold/non-manifold, arbitrary genus)
- Codecs:
Using the Open3DGC Compression Tool
- The "test_o3dgc" tool supports only OBJ files with a single triangular model
- Pre-built binaries for Win32, Win64 and ubuntu are available here
- Example of test models are located here
- To compress the "bunny" model file use the following command line:
- Binary stream
test_o3dgc.exe -c -st binary -i bunny.obj
- ASCII stream
test_o3dgc.exe -c -st ascii -i bunny.obj
- ASCII streams should be further compressed by using GZip
- To decompress the stream:
test_o3dgc.exe -d -i bunny.s3d
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