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I want to know if its possible to draw in opengl 3.1+ core profile using vertex arrays ( client side rendering) without using the VBO and VAO. I know in opengl 3.1+ core profile use of VAO is essential while using VAO. I want to know if its possible to draw without using VBO and VAO by using vertex arrays (client side rendering). If not possible (which I think is true), can you please provide some reference document as well.

Pankaj Bansal
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  • Comments here may help : http://stackoverflow.com/questions/31326918/opengl-3-0-drawing-a-triangle-without-vbos-or-vaos – Pierre May 11 '16 at 11:22

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Short answer: no

Immediate Mode is deprecated with OpenGL >= 3.0, although some implemetations still contain parts of the fixed-functionality pipeline.

OpenGL 3.1 removes most of the functions of Immediate Mode

See Legacy OpenGL

In order to draw something in Core Profile in OpenGL 3.1 or higher you have to use at least one VBO and VAO

Nightkiller
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  • I am talking about using the vertex array (client side rendering) without creating VBO and VAO not immediate mode. I think these 2 are different though even I feel they both have been deprecated. not sure though – Pankaj Bansal May 12 '16 at 04:51
  • One note: It *is* technically possible to draw without a VBO --- by [using gl_VertexID](https://rauwendaal.net/2014/06/14/rendering-a-screen-covering-triangle-in-opengl/). Note that this is really only appropriate for simple things (e.g. full-screen triangles). – Tim Čas Mar 29 '18 at 14:17
  • @PankajBansal "Client-side rendering", as you call it, is just the driver doing the `glGenBuffers` / `glBuffer[Sub]Data` for you, instead of you doing it manually. It still has to be uploaded to the GPU, so doing `glBuffer[Sub]Data` before drawing a buffer will accomplish the same (but faster, as the application knows better how to deal with buffers than a driver that has to do guesswork!). – Tim Čas Mar 29 '18 at 14:22