De nouveaux exemples : représentations de fonctions

diff --git a/exemples/fonctions/LISTE.txt b/exemples/fonctions/LISTE.txt
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+fonction1-1.png
+fonction2-1.png
+== Les sources
+fonction1.mp
+fonction2.mp
+== Les PDF
+fonction1-1.pdf
+fonction2-1.pdf
+

diff --git a/exemples/fonctions/fonction1-1.pdf b/exemples/fonctions/fonction1-1.pdf
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diff --git a/exemples/fonctions/fonction1-1.png b/exemples/fonctions/fonction1-1.png
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diff --git a/exemples/fonctions/fonction1.mp b/exemples/fonctions/fonction1.mp
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+input gdd;
+input gdd-rep;
+input gdd-lbl;
+input gdd-tra;
+input svgnames;
+
+lblPreambule := "\usepackage[frenchb]{babel}"        &
+                "\usepackage[garamond]{mathdesign}"  &
+                "\usepackage{amsmath}\usepackage{mflogo}";
+
+input gdd-fct;
+input gdd-plt;
+
+labeloffset := 6;
+gddU:=1.2cm;
+
+vardef f(expr x) = sqrt(x+3-4*sqrt(x-1))+sqrt(x+8-6*sqrt(x-1)) enddef;
+
+def avecCrayon(expr t,c) = withpen pencircle scaled t withcolor c enddef;
+
+
+
+beginfig(1);
+
+Repere(10,6,1,2,.8,0.8);
+ Axes; 
+ Debut; 
+  Graduations; Unites(1);
+
+  trace Representation(f,1,12,100) avecCrayon(1.5,Indigo);
+
+  pointe Point(5,1);
+  pointe Point(10,1);
+
+  label.top(TEX("\(y=\sqrt{x+3-4\sqrt{x-1}}+\sqrt{x+8-6\sqrt{x-1}}\)"),
+     (7,2.5) gddEnPlace) withcolor Olive;
+ Fin;
+
+
+endfig;
+
+end
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diff --git a/exemples/fonctions/fonction2-1.pdf b/exemples/fonctions/fonction2-1.pdf
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diff --git a/exemples/fonctions/fonction2-1.png b/exemples/fonctions/fonction2-1.png
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diff --git a/exemples/fonctions/fonction2.mp b/exemples/fonctions/fonction2.mp
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+input gdd;
+input gdd-rep;
+input gdd-lbl;
+input gdd-tra;
+input svgnames;
+
+lblPreambule := "\usepackage[frenchb]{babel}"        &
+                "\usepackage[garamond]{mathdesign}"  &
+                "\usepackage{amsmath}\usepackage{mflogo}";
+
+input gdd-fct;
+input gdd-plt;
+
+labeloffset := 6;
+gddU:=1.2cm;
+
+vardef f(expr x) = x*(Pi-x) enddef;  % f
+vardef g(expr x) = Pi-2*x enddef;    % f'
+vardef h(expr x) = -2 enddef;        % f''
+
+def avecCrayon(expr t,c) = withpen pencircle scaled t withcolor c enddef;
+
+
+
+beginfig(1);
+
+Repere(10,6,5,3,.8,0.8);
+Axes;
+ Debut;
+  Graduations;
+
+  trace (Pi,-2)--(Pi,2) dashed evenly;
+  trace (-Pi,-2)--(-Pi,2) dashed evenly;
+
+  trace Representation(f,0,Pi,100) avecCrayon(1.5,Indigo);
+  trace (Representation(f,0,Pi,100) scaled -1) avecCrayon(1.5,Indigo);
+  trace (Representation(f,0,Pi,100) shifted (-2*Pi,0)) avecCrayon(1.5,Indigo);
+  trace (Representation(f,0,Pi,100) scaled -1 shifted (2*Pi,0)) avecCrayon(1.5,Indigo);
+
+  trace Representation(g,0,Pi,100) avecCrayon(1.5,Olive);
+  trace (Representation(g,0,Pi,100) xscaled -1) avecCrayon(1.5,Olive);
+  trace (Representation(g,0,Pi,100) shifted (-2*Pi,0)) avecCrayon(1.5,Olive);
+  trace (Representation(g,0,Pi,100) xscaled -1 shifted (2*Pi,0)) avecCrayon(1.5,Olive);
+
+  trace Representation(h,0,Pi,100) avecCrayon(1.5,Orange);
+  trace (Representation(h,0,Pi,100) scaled -1) avecCrayon(1.5,Orange);
+  trace (Representation(h,0,Pi,100) shifted (-2*Pi,0)) avecCrayon(1.5,Orange);
+  trace (Representation(h,0,Pi,100) scaled -1 shifted (2*Pi,0)) avecCrayon(1.5,Orange);
+
+  pointe Point(Pi,2);
+  pointe Point(Pi,-2);
+  pointe Point(-Pi,2);
+  pointe Point(-Pi,-2); 
+
+  label.urt(TEX("\(-\pi\)"), (-Pi,0) gddEnPlace) withcolor Peru;
+  label.ulft(TEX("\(\pi\)"), (Pi,0) gddEnPlace) withcolor Peru;
+Fin;
+
+trace (0,-0.5)--(1,-0.5) avecCrayon(1.5,Indigo);
+label.rt(TEX("\(f\)"), (1,-0.5) gddEnPlace);
+trace (2,-0.5)--(3,-0.5) avecCrayon(1.5,Olive);
+label.rt(TEX("\(f'\)"), (3,-0.5) gddEnPlace);
+trace (4,-0.5)--(5,-0.5) avecCrayon(1.5,Orange);
+label.rt(TEX("\(f''\)"), (5,-0.5) gddEnPlace);
+labeloffset := 0;
+label.lft(TEX("\MP{}"), (10,-0.5) gddEnPlace);
+
+endfig;
+
+end
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diff --git a/exemples/fonctions/index.xml b/exemples/fonctions/index.xml
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+<simple>
+  <titre>mp-gdd &ndash; Représentations de fonctions</titre>
+</simple>
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