I am using freeglut, GLEW and DevIL to render a textured teapot using a vertex and fragment shader. This is all working fine in OpenGL 2.0 and GLSL 1.2 on Ubuntu 14.04. Now, I want to apply a bump...

What is the modern equivalent of the OpenGL function gluOrtho2d? clang is giving me deprecation warnings. I believe I need to write some kind of vertex shader? What should it look like?