Question

I imported a model from blender to a C array and displayed it with openGL (glew) under Qt.

I have an embedded resource vertex and fragment shader too. I managed to make the vertex shader work and display correctly the model, but now I’d like to give it a gradient-like effect (it’s a simple box, but I’m planning to write on it somehow, so I need to make it look decent).

How may I accomplish this? A texture with blender? Is there any better way?

Answer 1

For a simple linear gradient you could just add a line in your vertex shader that sets gl_FrontColor to some (vec4) value, e.g. depending on the vertex’s Y-coordinate. And in the fragment shader you set the gl_FragColor to gl_Color (or multiply it by gl_Color if you’re also texturing the object).