fallenAngel

So basically i can pass array of int in vertex shader and opengl will make it float internally?

@MartinSojka so what do you recommend? how should i proceed?

I have already a heightmap in .bmp. and I have array of pixel parsed from it. I just want to feed those data in vertex shader without any texture, effects. Just plain boring single colored terrain.

I want to do something practical before moving forward

I am just learning opengl. I am not sure what you are asking. I am following opengl superbible and I am not yet reached textures.

data of heightmaps are in int. how should it feed the data in vertex shader? should it process the heightmap value to float or it should be left to opengl to handle the normalization?