multiple light sources each with their own shader

OpenGL OpenGL: Basic Coding
1

hi, ive created quite a few library functions for creating linked lists with models loaded by assimp and i understand the basic lighting models. i want to, for convenience, be able to create one shader for each light and pass all the models through these seperate shaders. it would make my life alot easier, i believe. if their is a way to do this, or if their is a better way to acheive the same result please let me know. thanks :slight_smile:

2

Basically you want to reuse shader code. Make 1-2-n shaders for diff lights and then use them in other model shaders ? If yes , then just create simple “include” directive algorithm when loading the shader, for example how i do it.


string LoadShaderSource(filename)

     string shadersource;
     OpenFile(filename)
     while(getline(file,line)
     {
        if(line.startswith(#include)
           extract filename from the line
           LoadShaderSource(filename)
       else
          shadersource.append(line)
       }
      return shadersource;

then in the shader you can use something like
#version 330 core

#include “Light.vsh”

// The rest of the shader
// That will be doing the model stuff
… use Light functions here …

3

k, im having a little trouble understanding what you are saying, but i believe im looking for a more dynamic solution. i would like to be able to add a lightsource at any time and also delete one at anytime. id like to create a file that gives the intenstiy, falloff, etc. and then a type of light. i would then run a copy of the necessary light type (which would be a shader program), with the proper variables once for every seperate light in the scene. thanks