<simulation>
  <header>
    <title>Tangente</title>
    <title lang="english">Tangent</title>
    <title lang="spanish">Tangente</title>
    <author>Stéphane Mottelet, Guillaume Barbaud</author>
    <date>Fri Sep 23 18:32:50 CEST 2005</date>
    <keywords lang="french">simulation,scilab,xml</keywords>
    <keywords lang="spanish">Simulación, Scilab, XML</keywords>
  </header>
  <notes lang="english">
    <p>A simple example using a cross-shaped cursor constrained to lie on a given curve (a parabola).</p>
    <p>By default there is no 'Parameter' menu because all parameter widgets are hidden.</p>
  </notes>
  <notes>
    <p>Un exemple simple utilisant un curseur lié à une courbe donnée (ici une parabole).</p>
    <p>Par défaut il n'y a pas de menu 'Paramètres' car tous les paramètres sont cachés.</p>
  </notes>
  <notes lang="spanish">
    <p>Un ejemplo sencillo que utiliza un cursor unido a una curva dada (Aquí una parábola).</p>
    <p>Por defecto no hay ningún menú "Parámetros" porque todos los parámetros no se pueden tocar.</p>
  </notes>
  <parameters><section>
      <title lang="french">Paramètres</title>
      <title lang="spanish">Parámetros</title>
      <point label="p1" state="hidden"><name>Point numéro 1</name><name lang="english">Point 1</name><name lang="spanish">Puntos 1</name><x1 label="a">
          <value>-0.5</value>
        </x1><x2 label="y1">
          <value>(-0.5-1)^2</value>
        </x2><constraints label="constr">
          <curve ref="f" />
        </constraints></point>
    </section></parameters>
  <compute>
    <defdomain1d label="x">
      <name>Abscisse</name>
      <name lang="english">Abscissa</name>
      <name lang="spanish">Abscisa</name>
      <interval steps="200">
        <initialvalue>-2</initialvalue>
        <finalvalue>2</finalvalue>
      </interval>
    </defdomain1d>
  </compute>
  <graphs>
    <nonparametriccurve2d label="f">
      <name>Fonction (x-1)²</name>
      <name lang="english">(x-1)² Fonction </name>
      <name lang="spanish">Función (x-1)²</name>
      <refdomain1d ref="x" />
      <x2 label="y">
        <name>Ordonnée</name>
        <name lang="english">Ordinate</name>
        <name lang="spanish">Ordenada</name>
        <value>(x-1).*(x-1)</value>
      </x2>
    </nonparametriccurve2d>
    <nonparametriccurve2d label="fprime">
      <name>Tangente de y=(x-1)² en x=a</name>
      <name lang="english">Tangent of y=(x-1)² at x=a</name>
      <name lang="spanish">Tangente de y=(x-1)² en x=a</name>
      <refdomain1d ref="x" />
      <x2 label="yp">
        <name lang="english">Ordinate</name>
        <name>Ordonnée</name>
        <name lang="spanish">Ordenada</name>
        <value>(a-1)**2+2*(a-1).*(x-a)</value>
      </x2>
    </nonparametriccurve2d>
    <polyline label="barre">
      <vertex x1="a" x2="-2">
        <name>a</name>
        <name lang="english">a</name>
        <name lang="spanish">a</name>
      </vertex>
      <vertex x1="a" x2="10" />
    </polyline>
    <polyline label="barre2">
      <vertex x1="-2" x2="(a-1)**2" />
      <vertex x1="2" x2="(a-1)**2" />
    </polyline>
  </graphs>
  <display>
    <window>
      <axis2d xmin="-2" xmax="2" ymin="-1" ymax="10">
        <drawcurve2d ref="f" />
        <drawcurve2d color="red" ref="fprime" />
        <drawcurve2d color="green" ref="barre" />
        <drawcurve2d color="green" ref="barre2" />
        <drawpoints ref="p1" />
      </axis2d>
    </window>
  </display>
</simulation>