Hi, i would like to know how i can introduce the mouseDragged method in a program involving the construction of a polygon. As such I have managed to construct the polygon but i need to drag the mouse say 5 pixels near a point and then drag the point and the lines joining it to  a new postion. This is my code so far:
String [] lines;
int index = 0;
int dragX, dragY;

void setup(){
 size(650,560);
 lines = loadStrings("coordinates.txt");
 frameRate(12);
 strokeWeight(5);
}
 
 void draw(){
   if(index < lines.length){
     String [] pieces = split(lines[index], '\t');
     if(pieces.length == 2){
       int x = int(pieces[0]);
       int y = int(pieces[1]);
       point(x,y);
       line(12,30,124,345);
       line(124,345,267,89);
       line(267,89,56,78);
       line(56,78,12,30);
       
       
     }
     
     index = index + 1;
   }
 }
 void mouseDragged(){
   
   
   
 }
   
 
 
  thanks for your help.

thanks a lot i will figure it out!