(OpenGL 3.1 - 4.2) Objects take up all of the screen space

Question

From what I know, everything about OpenGL changed since 3.1 and now I can't figure out how to re-size the rendering context.

float positionData[] =  {   -0.8f, -0.8f, 0.0f,
                             0.8f, -0.8f, 0.0f,
                             0.0f,  0.8f, 0.0f  };

Is there a setting that can fix this? Or do I have to incorporate the math into the shaders themselves.

Answer 1

You don't resize the rendering context (it doesn't make sense to do so), but you can resize the viewport. Use functions like glViewport and friends - you can read about them in the core profile spec.

If you're talking about moving the 'camera' then you'll have to create a matrix and pass it to the shaders. There are many tutorials explaining how to do this.