source: network-game/graphics_library/SimpleTransform.vertexshader

#version 330 core

// Input vertex data, different for all executions of this shader.
layout(location = 0) in vec3 vertexPosition_modelspace;

// Notice that the "1" here equals the "1" in glVertexAttribPointer
layout(location = 1) in vec3 vertexColor;

// Output data ; will be interpolated for each fragment.
out vec3 fragmentColor;
// Values that stay constant for the whole mesh.
uniform mat4 MVP;

void main(){

        // Output position of the vertex, in clip space : MVP * position
        gl_Position =  MVP * vec4(vertexPosition_modelspace,1);

   // The color of each vertex will be interpolated
   // to produce the color of each fragment
   fragmentColor = vertexColor;
}