Please graphics programmers in The house
I'm learning opengl with sdl2 and when I try to draw a 3d shape without using The textures it just returns a blank screen. But if I use textures it works perfectly.

MaxFrost:
Please graphics programmers in The house
I'm learning opengl with sdl2 and when I try to draw a 3d shape without using The textures it just returns a blank screen. But if I use textures it works perfectly.

Wireframe mode, check there is a GL command for that

to add to what qtguru suggested also try and manipulate the scene and geometry lighting.

if you know some javascript i would suggest you try out 3js. its what i use for web 3d

darkdenizen:
to add to what qtguru suggested also try and manipulate the scene and geometry lighting.

if you know some javascript i would suggest you try out 3js. its what i use for web 3d

I think there is a mode that either draws with line or fill.

OP this is SDL and C++, mehn you're much better off on Reddit,

qtguru:


Wireframe mode, check there is a GL command for that

What I mean is how I go about drawing a 3d object without filling it with textures instead filling it with plain colours

A simple way is to add a uniform vec4 colorYouWant in the GLSL shader and set the output color to that color. One reason you may be getting blank is probably because no texture means black and with alpha testing enabled, that will be blank.

MaxFrost:


What I mean is how I go about drawing a 3d object without filling it with textures instead filling it with plain colours

A simple way is to add a uniform vec4 colorYouWant in the GLSL shader and set the output color to that color. One reason you may be getting blank is probably because no texture means black(vec4(0.0f, 0.0f, 0.0f, 0.0f)) and with alpha testing enabled, that will be blank.

And this depends on whether you are using fixed function pipeline or programmable pipeline. Fixed function pipeline is outdated and you don't need to waste time learning it. You need to use GLSL shaders and set the shader uniform as I outlined earlier.