Difference between revisions of "Point"

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Line 3: Line 3:
 
It is produced by the following commands:
 
It is produced by the following commands:
 
<source lang="xml">
 
<source lang="xml">
<div id="jxgbox" class="jxgbox" style="width:500px; height:200px; float:left; "></div>
+
<div id="jxgbox" class="jxgbox" style="width:500px; height:200px;"></div>
 
<script type="text/javascript">
 
<script type="text/javascript">
 
  var board = JXG.JSXGraph.initBoard('jxgbox', {originX: 200, originY: 100, unitX: 50, unitY: 50});
 
  var board = JXG.JSXGraph.initBoard('jxgbox', {originX: 200, originY: 100, unitX: 50, unitY: 50});
Line 20: Line 20:
 
  var p = board.createElement('point',[1,1]);
 
  var p = board.createElement('point',[1,1]);
 
</script>
 
</script>
<br clear=all>
 
 
</html>
 
</html>
  
Line 31: Line 30:
  
 
<html>
 
<html>
<div id="jxgbox2" class="jxgbox" style="width:500px; height:200px; float:left; "></div>
+
<div id="jxgbox2" class="jxgbox" style="width:500px; height:200px;"></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});
 
var p = b2.createElement('point',[1,1], {name:'X',style:5});
 
var p = b2.createElement('point',[1,1], {name:'X',style:5});
 
</script>
 
</script>
<br clear=all>
 
 
</html>
 
</html>
  
Line 53: Line 51:
  
 
<html>
 
<html>
<div id="jxgbox3" class="jxgbox" style="width:600px; height:200px; float:left; "></div>
+
<div id="jxgbox3" class="jxgbox" style="width:600px; height:200px; "></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});
Line 61: Line 59:
 
p.setProperty({fixed:true});
 
p.setProperty({fixed:true});
 
</script>
 
</script>
<br clear=all>
 
 
</html>
 
</html>
  

Revision as of 10:59, 17 September 2008

Construction of a free point

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;"></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});

Construction of a constrained point