A vertex buffer object (VBO) is an OpenGL feature that provides methods for uploading vertex data (position, normal vector, color, etc.) to the video device for non-immediate-mode rendering. VBOs offer substantial performance gains over immediate mode rendering primarily because the data reside in video device memory rather than system memory and so it can be rendered directly by the video device. These are equivalent to vertex buffers in Direct3D.
The vertex buffer object specification has been standardized by the OpenGL Architecture Review Board as of OpenGL Version 1.5 (in 2003). Similar functionality was available before the standardization of VBOs via the Nvidia-created extension "vertex array range" or ATI's "vertex array object" extension.
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