oglc/res/shader/shader.vert

#version 330 core
layout (location = 0) in vec3 aPos;     // position has attribute position 0
layout (location = 1) in vec3 aColor;   // color has attribute position 1

out vec3 ourColor;

void main()
{
    gl_Position = vec4(aPos, 1.0);
    ourColor = aColor;
}