
<b>Draw a line, a polygon, points, a segment, a vector, a rectangle.</b>
(name : <span class="tt">javacurve</span>)
<br/>
This reply type allows the user to draw a line, a polygon, a segment, a
vector,  a rectangle or several points on a drawing.

The good answer is given as a matrix (row separator:
 semi-colon `;'). The first row is the image URL.
The second row is the condition for testing the user drawing in the following
list.
Si l'on désire analyser la réponse par des conditions,
on mettra une variable vide pour la bonne réponse et on rajoute 
dans le champ <span class="tt wims_code_words">embed</span>
en seconde ligne l'URl de l'image et en troisième ligne le type de tracé comme 
dans le tableau suivant (par exemple <span class="tt wims_code_words">points</span>,
<span class="tt wims_code_words">line</span> ...).
</p>
!set p=anstype/javacurve
!readproc tabletheme
$table_header
!set caption=!record 1 of help/$p
  <caption>$caption</caption>
  !set header=!record 2 of help/$p
  $table_tr<th>$(header[1])</th><th>$(header[2])</th></tr>
  !set cnt_record=!recordcnt help/$p
  !for u= 3 to $cnt_record
    !set l_=!record $u of help/$p
    $table_tr<td class="tt">
!line 1 of $l_
    </td><td>
!line 2 to -1 of $l_
   </td></tr>
  !next
$table_end

<p>
Options may be added in the option field:
<span class="tt wims_code_words">precision</span, 
<span class="tt wims_code_words">color1</span (reply color), 
<span class="tt wims_code_words">color2</span> (good answer color).

The parameter <span class="tt wims_code_words">precision</span> is subtil ...
for example 
</p>
<pre>
\answer{}{...}{type=jsxgraphcurve}{option=color1=black color2=#B4B4FF precision=8}
</pre>

<p>
It is recommended that this input field be embedded in the statement. It
 cannot coexist with other input fields, for the obvious reason that any user
 click on the image will send the form.  The size of the image must be written in
 the second argument of <span class="tt wims_code_words">\embed</span> as <span class="tt wims_code_words">L x H</span>, 
for example <span class="tt wims_code_words">\embed{reply</span><em>n</em>, <span class="tt wims_code_words">300 x 400}</span>.

</p>
En général, the variable
<span class="tt wims_code_variable">\reply</span><em>n</em>, where <em>n</em> is the number
 of the input field, which can be used in a \feedback is 
 the click replies (x1,...)
 except in the following cases : 
<ul><li>
In case of <span class="tt">points</span>,
 the first line is the list of click coordinates in pixels, 
 the second line is <span class="tt">n1,n2,n3</span> with
<span class="tt">n1</span> number of correct points, <span class="tt">n2</span> number of missing points,
<span class="tt">n3</span> number of incorrect points.The third line is the list
of numbers of correctly found points. 
</li><li>
in case of <span class="tt">cercle</span>, the first line is the list
of click coordinates and radius in pixels, the second line
is <span class="tt">n1,n2</span> with 
<span class="tt">n1</span> 1 if the center is correct, else 0 and
<span class="tt">n2</span> 1 if the radius is correct, else 0.
</li>
<li>
in case of <span class="tt">sline</span>, the first line is the list
of click coordinates in pixels, the second line
is <span class="tt">n1,n2,n3</span> with
<span class="tt">n1</span> 1 if the origin is correct, else 0,
<span class="tt">n2</span> 1 if the direction is correct, else 0,
<span class="tt">n3</span>1 if the orientation is correct, else 0.
</li>
</ul>
