The offset, in bytes, of vertex data for the attribute in a vertex buffer, relative to the start of data for each vertex.
- iOS 9.0+
- macOS 10.11+
- tvOS 9.0+
- Model I/O
For example, if a vertex buffer contains interleaved data for two attributes, the first attribute’s offset is typically zero, and the second attribute’s offset is at least the data size of the first attribute.