RenderTarget and OpenGL?

[JunkerKun]

Hello there, me again.

Can someone tell me if there is a way to use RenderTargets to render OpenGL objects? I mean, I want to use them for post processing and I am rendering 3D with OpenGL (not using SFML for 3D).

[Mortal]

yes,you can draw 3D scene with sf::RenderTarget by using sf::Sprite if you were rendering the whole scene in texture either by sf::RenderTexture or by opengl glFramebufferTexture2D

[JunkerKun]

That's the problem...
How would I use sf::Texture to render a 3D scene to it? 

[Mortal]

you should use sf::RenderTexture first to draw 3D scene and then get the underlying texture of sf::RenderTexture object to draw it with sf::Sprite.

check the offcial tutrial how to setpup sf::RenderTexture on this link

i hope this might help

[eXpl0it3r]

You can bind textures for use with OpenGL.

[Mortal]

You can bind textures for use with OpenGL.

wasn't really necessary with SFML > 2.4. i have updated all my sfml demos when you guys upgraded it. i will post one of them that use sf::RenderTexture in Screenshot Thread. i keep these silly demos for quick setup and help me to memorize it.

[JunkerKun]

Thanks for the answers.
Currently I am stuck at drawing the 3d scene to the target. In the tutorial sf::RenderTexture::Draw is used, however I can't use that since I'm not deriving my classes from any SFML class. So how should I render my models to a target?

[Chaia*]

You bind the Target by calling sf::RenderTarget::SetActive(), then you set your states, buffers etc. and call the draw function (e.g. glDrawArrays(...)). If you want to mix OpenGl and SFML Rendering you need to reset/push/pop the respective states (see tutorials). Generally you can bind sfml textures and shaders by their bind() function.