%@AUTEUR:Guillaume Connan
prologues:=2;

input courbes;
input geo;

color vert_e, turquoise, orange, vert_fonce, rose, vert_mer, bleu_ciel, or, rouge_v,bleu_m,bleu,bleu_f;
vert_e:=(0,0.790002,0.340007);
turquoise:=(0.250999,0.878399,0.815699);
orange:=(0.589999,0.269997,0.080004);
vert_fonce:=(0,1.4*0.392193,0);
rose:=(1.0, 0.752907, 0.796106);
bleu_ciel:=(1.2*0.529405,1.2*0.807794,1);%.2*0.921598);
or:=(1,0.843104,0);
rouge_v:=(0.829997,0.099994,0.119999);
bleu_m:=(0.7*0.529405,0.7*0.807794,0.7);%*0.921598);
bleu_f:=(0.211762,0.3231176,0.3686392);
bleu:=(0.529405,0.807794,1);

%  Reci Fonction  puissance   paire


beginfig(1);
  vardef axes =
    drawarrow (ux*xmin,0) -- (ux*xmax,0); % axe des x
    drawarrow ((0,uy*ymin) -- (0,uy*ymax))  ; % axe des y
    label.lrt(btex $x$ etex,(xmax*ux,0)); % label de l'axe des x
    label.urt(btex $y$ etex,(0,ymax*uy)); % label de l'axe des y
  enddef;

% Déclarations des constantes %
  ux:=1cm; uy:=0.5*ux;
  xmin:=-4.5; xmax:=4.5;
  ymin:=-0.5; ymax:=8;
  coefficient:=1; % coefficient d'échelle

%Tracé des axes
  axes;
  label.llft(btex $0$ etex,(-.1*ux,-.15*uy));
  
  vardef f(expr x) =0.3*x*x enddef;
  
  vardef trace (suffix g)(expr a,b,inc) =
    save i; numeric i;
    for i=a step inc until b:
      (i*ux,f(i)*uy) ..
    endfor (b*ux,f(b)*uy)
  enddef;
  
  draw (trace(g,-4.5,0,.10)) dashed evenly withcolor bleu_m;
  draw (trace(g,0,4.5,.10))  withcolor bleu_m;
endfig;
end