geometryShader.geom

/*
    Purpose: This code describes the function of Prometheus's geometry shader.  Implementing the graphics using the
    OpenGL Shading Language (GLSL) ensures efficient visualization and contributes to the code's longevity.  This
    shader can determine which model is being requested from the GUI and activate the appropriate subroutines
    to generate that model.  Atom coordinates are passed to this shader in a vertex buffer object (VBO), and vertices of
    the model being displayed (spheres, cylinders, surfaces) are all generated procedurally within this shader.  We leverage the
    power of the GPU to do as much of the heavy lifting as possible.

*/

layout(points) in;
layout(points) out;

void main(void)
{
    for (i = 0; i < gl_in.length(); i++)
    {
        gl_Position = gl_in[i].gl_Position;
        EmitVertex();
    }
    EndPrimitive();
}