createCanvas(400, 400);

  let x=-sqrt(2)

  let y=-2

  while(x<sqrt(2)){

    while(y<2){

      print('('+round(x,2)+','+round(y,2)+','+round(f(x,y),2)+')')

      y+=0.1

    }

    x+=0.1

  }

}

​

function f(x,y) {

  return sq(x)/2+sq(y)/4-1

}