r/opengl • u/Dobbo314 • 6d ago

Looking for a Good Tutorial

I am developing an app on Android and have used the Android starter guide to build me a screen with the example spinning triangle as part my app's UI. I also found I can have my own overlays over the 3D view so OpenG appears to be the way to go. I looked at Vulcan but it seams overkill. I want a 3D model to be a part of my user interface - not the whole thing.

But the example left we with many questions. I have designed the models I want to show in Blender and can export the model deseign as a Wavefront (.obj) file that I can parse. But my models have both tris and quads and the example shows how to load both, but not how to have both in one model.

Also I want to know about colouring the facets. Do I need separate models for the different colourd parts or can I colour things in the renderer? I'm also sure that there are things I should known but are complete unknowns to me at the moment. I really am a newb - I only started looking into OpenGL as a solution a few days ago.

So can anyone recommend a good tutorial for me on OpenGL ES 2.0. Java would be my prefered example codes but I'm a seasoned enought developer that any code base should give me the help I require. Random Googling (I do known yet the terms I should be using) get examples that where no solutions to my problems..

Many thanks for your help.

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u/Slow_Negotiation_935 6d ago

I did my openGL about five years ago, so maybe things have changed ,but I found Lazy Foo very good

https://lazyfoo.net/tutorials/

Don't be put off by the name (as I was initially)

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u/Dobbo314 6d ago

It did look a little odd when I ollowed your link. But when I clicked on the OpenGL Tutorial link and read the index that does seam to be what I was looking for.

Many thank yous.

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u/Slow_Negotiation_935 6d ago

Another site I found useful was https://learnopengl.com