title: Opengl-Generating random points in a specific range
body: <p>I want to generate random points in a specific range for an opengl program, say points between the coordinates Xmin=200, Xmax = 400 and Ymin= 200 , Ymax = 400.</p>
  
  <p>Actually I am trying to simulate a volcanic eruption in 2D using simple C code and without using any textures(I cannot use textures in my project). 
  PS: I Have very basic knowledge about opengl, just a beginner.</p>
  
  <p>Thanks.</p>