Slick Forums

Add a stateful collection of sprites being rendered that can be backed by a vertex array (or VBO) for optimised rendering. This will come with a bunch of restrictions but will allow certain circumstances to render supper quick Smile

Kev

Could you describe what you mean by a VBO (what is that?) and a vertex array?

Sounds like something that could optimize SlickSet's sorted sprite rendering by quite a bit.

Vertex Array and VBO (vertex buffer object) are a way of batching drawing geometry (and hence sprites) in OpenGL. If the concept of a Sprite and a SpriteGroup existed then the drawing could be greated optimised into few GL calls (this wouldn't speed it up as much as it sounds, but it could be quite a saving for large numbers of sprites).

However, it's something that needs to be written against OpenGL - it really belongs in the core if it's going to get done. I've been shying away from anything "engine" related - like managed sprites. It's really not the aim of Slick to be an engine.

Kev

Kev, seems like you would need it (for ROY?).
Why not create some kind of extension of Sprite/SpriteGroup that uses the Callables to protect the VBO stuff?
This way you could get what you want. Or does it need to get into Slick way deeper?

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Right Angle Games | Marte Engine
Back to the past | Star Cleaner | SpiderTrap

Don't need it for ROY particularly. Callables are only for users to use, if we were to add it to Slick we'd integrate it fully - like the use of pbuffers or fbos.

Kev

I suppose this RFE has been frozen... But, given the recent discussion about performance, I tried to set up a sort of VBO preallocated sprite engine, but with no success. I have little experience with OpenGL (though I have some with DirectX), and even following the instructions on lwjgl.org I couldn't manage to show anything on screen.

Do you have some clue about setting up a working VBO in Slick's context? I'd like to try to implement this kind of sprites:)

thanks in advance:)

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Carotinho

I've never used VBOs in a slick context before.

Kev

Hi!

Thanks for answering:) Yesterday I succeeded at building a single lwjgl app with a running interleaved VBO. I was messing with offsets (dear old sizeof). Later I'll try this in Slick.

Thanks:)

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Carotinho