add   frame.setResizable(true);  to setup

hi,

Cedric this works.

I am trying to get the background constantly show when the sketch is resized. I am able to do it however only when the draw command refreshes the screen. During the drag I can see gaps.

Here is the code

1. public int w  = screen.width;
   PImage a,b;
   public int h = screen.height;
   void setup(){
     size(w,h,P3D);
     frame.setResizable(true);
     seta();
     int j= screen.height;
     b=createImage(screen.width,screen.height,ARGB);
     for (int x=0;x<screen.width;x++){
       for (int y=0;y<screen.height;y++){
         b.set(x,y,color(j-y,y,x-y,145));
       }
     }
   }
   void seta(){
     a=createImage(width,height,ARGB);
     for (int x=0;x<width;x++){
       for (int y=0;y<height;y++){
         a.set(x,y,color(height-y,y,x-y,245));
       }
     }
   }
   void draw(){
     translate(-width/2,-height/2);
     image(b,0,0);
     if ((a.width ==width && a.height ==height)){
       if (a!=null){
         image(a,0,0);
         //background(a);
       }
     }
   
     seta();
   }
   void mouseDragged(){
     w=width;
     h=height;
     seta();
   }
   
   void mousePressed(){
     w=width;
     h=height;
     seta();
   }
   void mouseReleased(){
   
     w=width;
     h=height;
     seta();
   }