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OpenCTM is a 3D geometry technology for storing triangle-based meshes in a compact format. == Overview == OpenCTM is an open source project that has evolved around a technology for compressing 3D triangle meshes. The technology is divided into three different parts: * An open, binary file format. * An open source software library for reading and writing OpenCTM files. * A software tool set for converting and viewing OpenCTM files. The triangle mesh data structure that OpenCTM uses is directly compatible with high performance graphics rendering pipelines, such as OpenGL, which makes is suitable for interactive computer graphics applications. Other application types, such as CAD/CAM tools, usually need to convert the mesh data into a custom mesh format for more efficient data handling. OpenCTM uses a triangle index array to represent the triangle connectivity information, and several arrays for representing vertex data (vertex coordinates, normals, UV coordinates and custom vertex attributes). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「OpenCTM」の詳細全文を読む スポンサード リンク
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