Adding/Removing from VBO at runtime

TJ · 2013-01-02T12:01:11

I'm new to Modern OpenGL and have been following a handful of tutorials online. I'd appreciate some clarification on a few things so my head doesn't explode. None of the tutorials speak of adding/removing data from VBOs once the buffer has already been filled. I could really use some assistance. So let's say I have 2 objects, each with vertex data loaded into a single VBO as [x, y, z, w, r, g, b, a, x, y, z, w, etc] What's the best practice to adding another object to the VBO? Copy the original VBO into a larger array, add the new vertex data, then bind the larger array as the VBO? Also, how would I go about removing objects (all of their vertex data)? Destroy the VBO and create a new one? (Removing particular parts of the VBO is beyond me.) As you can tell, I don't quite have a grasp on the concept. If someone could point me in the right direction I'd very much appreciate it.

Graphics and GPU Programming Programming OpenGL

Started by Spck December 29, 2012 10:23 AM

9 comments, last by 21st Century Moose 11 years, 3 months ago

21st Century Moose

13,459

January 02, 2013 12:01 PM

Then _definitely_ try both options Early optimization isn't vital, moreover its usually harmful. Make a working prototype first.

I'd disagree with your "early optimization" comment here - getting buffer object updates correct is not "early optimization" - it's a fundamental requirement.

Direct3D has need of instancing, but we do not. We have plenty of glVertexAttrib calls.

Adding/Removing from VBO at runtime

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Adding/Removing from VBO at runtime

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