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Editorial Team
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Asked: 2026-05-21T09:34:49+00:00

Im using OpenGL with c++ to make a game. and right now, im wondering

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Im using OpenGL with c++ to make a game. and right now, im wondering how i would be able to turn 3D coordinates into 2D positions for example: drawing a 2D health bar over a 3D model’s head, or something along those lines. xD

so anyways, im wondering how i would be able to set this up where it can be used in SFML. right now im looking up some information but i dont completely understand the methods…

Basicaly, im asking how would i make 3D opengl coordinates convert to 2D coordinates onto the screen using SFML

im also wondering how i would convert 2D coordinates back to 3D, just so i know that too.

also some example code would be nice, just so i get a better picture

thanks for reading

-Molma

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1 Answer

  1. Editorial Team

    Since you’re using OpenGL, I’d suggest gluProject for mapping from 3D to 2D and gluUnProject for mapping from 2D to 3D (note @ChrisF’s comment on unprojecting).
    Though I gotta admit, I got no real experience with OpenGL, I just know the terminology for what you wanted and googled for it. 🙂

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