JSXGraph Moodle / drawing to board after student has answered

[Juha-Matti Huusko]

Dear all,

1) In Moodle, I have a STACK question, Question text:

Give the point \(A\) in the form [a,b].
[[jsxgraph]]
    var brd = JXG.JSXGraph.initBoard(BOARDID, {boundingbox:[-5,5,5,-5], axis:true});
    var A = brd.create('point', [2,3],{name:'A'});
[[/jsxgraph]]

[[input:ans1]] [[validation:ans1]]

2) If the student answers wrong, let's say [5,6], I want to draw the student's point to the picture. Answer is wrong. Your point is different, as you can see in the picture.

But, how can I access the board? What will be the ID of the board and how can I draw more points there?

Best wishes,

Juha-Matti Huusko

[Raed Shorrosh]

one way to do what you are asking is as follows:

<script type="text/javascript">
    var checkanswer;
</script>
[[jsxgraph]]
  var board = JXG.JSXGraph.initBoard(divid, {boundingbox: [-10, 5, 10, -5], axis: true, showCopyright: false});
  var A=board.create('point', [0,0],{name:'A'});
  var ans=[0,0];
  checkanswer=function(ans){
    A.moveTo(ans);
    board.update();

  }

[[/jsxgraph]]
[[input:ans1]] [[validation:ans1]]

now in the false node of the prt copy the following (as HTML) :

<p>your answer is wrong, see the graph</p>

<div style="display:none;">
    [[jsxgraph width="0px" height="0px"]]
       checkanswer({#ans1#});
    [[/jsxgraph]]
</div>

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