/*  
 *  some jittery color functions
 *
 *  changes color and margins slightly
 *  requires JQuery
 *
 *    russell holt
 *    rsl@russellholt.com
 * 
 */


/*  jitter_rgba_color

    slightly randomize the given rgba color within the given range
    returns a css rgba string of the form "rgba(r,g,b,o)"
    
    does not change the opacity

    range is the total distance that the randomized values will fall within,
    ie, + or - range/2
    
    example:
        jitter_rgba_color(100,100,100,0.5,10)
    may return
        "rgba(105,9)"
*/
function jitter_rgba_color(red, green, blue, opacity, range)
{
  x = Math.round(range/2);
  r = red + x - Math.round(Math.random() * range);
  g = green + x - Math.round(Math.random() * range);
  b = blue + x - Math.round(Math.random() * range);
  
  return "rgba(" + r + ',' + g + ',' + b + "," + opacity + ")";
}

/*  zap()
 *  sets the color and margins for my posts and project blocks
 */ 
function zap(sizes) {
    
  //$("#sidebar a").each(function(i) {    
  $("#archs a").each(function(i) {    
    this.style.background = jitter_rgba_color(51,69,69,0.3 + 0.3*(i%2),10);
  });
  $("#footblog a").each(function(i) {   
    this.style.background = jitter_rgba_color(51,69,69,0.7,20);
  });
      
  $(".multipost").each(function(i) {
    if (sizes) {
        this.style.marginLeft = (Math.round(Math.random() * 1000) % 2 + 35 ) + "%";
    }
    this.style.background = jitter_rgba_color(30,42,61,0.8,20);
  });

  $(".singlepost").each(function(i) {
      this.style.background = jitter_rgba_color(30,42,61,0.8,20);
  });

  $(".xproj").each(function(i) {
    //if (sizes)
    //    this.style.marginLeft = (Math.round(Math.random() * 1000) % 8 + 20) + "%";
    this.style.background = jitter_rgba_color(100,180,100,0.3 + 0.1*(i%2),3); // 0.2 + 0.1*(i%2)
    
  });
  
  $(".xmisc").each(function(i) {
    this.style.background = jitter_rgba_color(38,51,51,0.7,25);
    // if (sizes)
    //     this.style.marginLeft = (Math.round(Math.random() * 1000) % 6 + 21) + "%";
  });    
    
}