Hello im trying to create a matrix of lines with this way:
Im using glmodel , and it just uses one  array to define all the lines or points, for example:
if i have coords[43, 14, 0 , 0 , 24, 44, 0, 0, 42, 33, 0 ,0 52, 23, 0 , 0]
the first value is x , the second one is y, third one is z , fourth one is alpha, the 5th one is x of my second point, sixth is y of my second point and so on.
So if i would like to draw 2 lines that array would mean:

line (43, 14 , 24, 44 )
line2 (43, 33, 53, 23)


Im trying to create an array of lines , ive made the following code:

Code:

  float  y = 0;
  for(int j = 1; j < 6  ; j += 1){
  float x = 0;
   for(int i = 0; i < 8 * 6  ; i += 8){
	  coords[i * j ] = x;	   //x1 
	  coords[i  * j + 1 ] = y + 0.2 ;    //y1
	  coords[i * j + 4 ] = x ;     //x2
	  coords[i * j + 5 ] = y + 0.35  ;    //y2
	  x += 0.15;
  } 
  y = y + 0.5;
}

 

but im getting this:

http://yfrog.com/0smatrizmalp


i would like to get this:

http://yfrog.com/86matrizbienj

anybody have an idea of what im doing wrong?

thanks

Seb.