шейдеры

Learning OpenGL4, what are shaders? I have a couple of questions

I started learning OpenGL4 from this site. http://opengl-tutorial.blogspot.com/p/2.html?m=1 And in the lesson that follows th ... via GLSL. Then it will all work well through the CPU? In short, I can work directly with the video card through the shaders?

Splitting the plane by the type of Voronoi diagram

Looking for an algorithm similar to the Voronoi diagram, which also, using a set of given points, splits the plane only into ... gles (polygons). Of course, you can, for example, "attach" the Delaunay triangulation, but maybe there is something simpler?