Vertex Array Objects // OpenGL Tutorial #17

In this video I will show you how to use Vertex Array Objects (VAO) in OpenGL in order to make it simpler to switch between groups of vertices that are characterized by different source buffers and different vertex layouts. I will also describe the compatibility and core profiles, show how to enable the core profile using FreeGLUT and describe how they affect the VAO. Finally, I'll review some changes that I've made in order to move most of the application code into a class.
Make sure to watch all the previous tutorials in the "OpenGL For Beginners" playlist at • OpenGL for Beginners
Please visit ogldev.org to see more of my tutorials on modern OpenGL.
Link to source: github.com/emeiri/ogldev/blob...
If you want to get the same version that was used in the video checkout the tag TUT_17_VAO.
OpenGL 4.6 specification: www.khronos.org/registry/Open...
Timecodes:
0:00 Intro
0:14 Background
0:57 Multiple meshes
1:23 Vertex Array Objects
2:10 Compatibility and core profiles
2:58 VAOs and the profiles
3:19 How the enable the core profile in FreeGLUT
4:06 Start of code review
4:30 The Tutorial17 class
5:02 FreeGLUT callbacks
6:03 Using the VAO
8:10 Rest of the Init method
8:41 The render loop
9:03 Getting the current VAO from the OpenGL runtime
9:22 The keyboard callback function
9:43 Object cleanup
10:41 Changes to the main function
10:56 Run the demo
11:14 Conclusion
Feel free to comment below.
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Enjoy,
Etay Meiri
#opengl #ogldev #opengtutorials

[@riccardomassa7006]

i have watched several other OpenGL tutorials but i could not quite understand how it worked, thanks to your videos i now understand it, thank you so much for doing this.

[@OGLDEV]

Glad it helped!

[@dimension-ji7xk]

Just what I've been waiting for. Thank you

[@OGLDEV]

You're welcome!

[@gamereplayhq]

Thanks for that illustration @1:56, helps create the mental model to understand vao concept more clearly.

[@OGLDEV]

Thanks!

[@matthewexline6589]

I love this video, thank you so much for making it. I was able to figure out what I was doing wrong assigning UVs to my vertex buffer by watching this.

[@OGLDEV]

Glad it helped!

[@linearz]

I'm following your tutorial with GLFW and with different programming language. Now, I understand why I have to use VAO from the start, the other tutorial I followed to get me started is using Core Profile.

[@OGLDEV]

Thanks, so everything is ok?

[@linearz]

@@OGLDEV yup, everything is working well. Thanks again!

[@OGLDEV]

You're welcome :-)

[@hunterize1516]

super nice, deserved more subscribers!

[@OGLDEV]

Thanks! Hope there will be...

[@tuduscz6836]

Thx. It helped me a lot.

[@OGLDEV]

Glad to hear :-)

[@brunofelix5434]

+1 subscriber #Brazil

[@OGLDEV]

Nice!

[@matthewexline6589]

Sorry for the stupid question. I'm trying to use opengl on an android app, C#/xamarin. I use SetEGLContextClientVersion(int version). @3:32, you use a function called InitContextVersion(int main, int sub). Do I need to find a function that is equivalent to InitContextVersion within Android.Opengl, or is SetEGLContextClientVersion just all there is and that's it?

[@OGLDEV]

Not a stupid question at all. Mobile development is more challenging due to the lack of GLUT/GLFW. I think SetEGLContextClientVersion is the equivalent of glutInitContextVersion.

[@nunumaster4083]

Ok lol

[@OGLDEV]

:-)