   please help!!!! with colorbar
  I am trying to display colorbar (color scale). Using OpenGL (GLUT). Maybe someone can write a source code, how to do this. Also I need to color an object (plate) witch consist of triangle finite elements, all nodes of triales has some values (0.005 - 0.03) i need to fill this plate using colorbar (min value 0.005, maximum value 0.03). How I must do it please help me (write a code).Thank you!!!! 