I am starting a project that is going to be displayed on a 1080p fullHD display in vertical position (rotated 90º).
Since I don't have such a big display I've been testing scaling and rotating everything I draw so I can make an idea how is going to look like when is shown in the display.
The problem is that the graphics have different sizes when I display them in portrait or in landscape.


Here the size of the square is different:



To draw it in portrait or in landscape I just have to give the correct value to the portrait variable
here is code code:

1. float scl;
   boolean portrait=false;
   void setup(){
     angle=0;
     scl=0.3;
     if(portrait){
       size(int(1080*scl),int(1920*scl),P3D);
     }else{
       size(int(1920*scl),int(1080*scl),P3D);
     }
   }
   void draw(){
     background(127);
     scale(scl);
     //in portrait mode I rotate the display
     if(portrait){
       translate(1080,0);
       rotateZ(radians(90));
     }
     rectMode(CENTER);
     translate(1920/2,1080/2,400);
     rect(0,0,500,500);
   }

I would like to be able to have the same size in both modes (portrait and landscape). I think it might have something to do with perspective.

thankyou