Difference between revisions of "Point"

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<html>
 
<html>
<div id="jxgbox3" class="jxgbox" style="width:500px; height:200px; float:left; "></div>
+
<div id="jxgbox2" class="jxgbox" style="width:500px; height:200px; float:left; "></div>
 
<script type="text/javascript">
 
<script type="text/javascript">
 
var b2 = JXG.JSXGraph.initBoard('jxgbox2', {originX: 200, originY: 100, unitX: 50, unitY: 50});
 
var b2 = JXG.JSXGraph.initBoard('jxgbox2', {originX: 200, originY: 100, unitX: 50, unitY: 50});
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p.setProperty({fixed:true});
 
p.setProperty({fixed:true});
 
</source>
 
</source>
 +
 
<html>
 
<html>
 +
<div id="jxgbox3" class="jxgbox" style="width:600px; height:200px; float:left; "></div>
 
<script type="text/javascript">
 
<script type="text/javascript">
 
var b3 = JXG.JSXGraph.initBoard('jxgbox3', {originX: 40, originY: 100, unitX: 40, unitY: 40});
 
var b3 = JXG.JSXGraph.initBoard('jxgbox3', {originX: 40, originY: 100, unitX: 40, unitY: 40});
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<br clear=all>
 
<br clear=all>
 
</html>
 
</html>
 
 
  
  
 
[[Category:Examples]]
 
[[Category:Examples]]

Revision as of 10:46, 17 September 2008

This example shows how to construct a simple, draggable point. It is produced by the following commands:

<div id="jxgbox" class="jxgbox" style="width:500px; height:200px; float:left; "></div>
<script type="text/javascript">
 var board = JXG.JSXGraph.initBoard('jxgbox', {originX: 200, originY: 100, unitX: 50, unitY: 50});
 var p = board.createElement('point',[1,1]);
</script>

The JavaScript code has to be placed AFTER the div element which will contain the construction. From now on, we will only show the JavaScript code.


Attributes of a point

Several attributes can be given to change the properties of a point.

var b2 = JXG.JSXGraph.initBoard('jxgbox2', {originX: 200, originY: 100, unitX: 50, unitY: 50});
var p = b2.createElement('point',[1,1], {name:'X',style:5});


Point styles

The property type of a point can attain the values 0..12. In this examples we use a for loop to create 13 points.

var b3 = JXG.JSXGraph.initBoard('jxgbox3', {originX: 40, originY: 100, unitX: 40, unitY: 40});
for (var i=0;i<13;i++) {
  var p = b3.createElement('point',[i,0], {name:'P_'+i, style:i});
}

After creating the points we set the property fixed of the last point, P_12, to true. I.e. the point is no longer draggable.

p.setProperty({fixed:true});