Reuleaux pentagon: Difference between revisions

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Line 47: Line 47:
var C = brd.create('point',[-2,-2]);
var C = brd.create('point',[-2,-2]);
var D = brd.create('point',[
var D = brd.create('point',[
                             C.X()+3*(1+Math.sqrt(5))/2/5*A.Dist(B)*0.5,
                             C.X()+3*(1+Math.sqrt(5))/2/5*A.Dist(B),
                             C.Y()
                             C.Y()
                           ]);
                           ]);
Line 142: Line 142:


===The underlying JavaScript code===
===The underlying JavaScript code===
coming soon...
<source lang="javascript">
<source lang="javascript">
JXG.Options.layer.polygon = 8;
JXG.Options.layer.sector = 8;
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-5,5,5,-5]});
brd.suspendUpdate();
var A = brd.create('point',[-2,-2]);
var B = brd.create('point',[2,-2]);
var pol = brd.create('regularpolygon',[A,B,5], {withLines:false, fillColor:'#093083', highlightFillColor:'#093083'});
for (var i=0;i<5;i++) {
    brd.create('arc',[pol.vertices[i],pol.vertices[(i+2)%5],pol.vertices[(i+3)%5]],{strokeColor:'#093083'});
    brd.create('sector',[pol.vertices[i],pol.vertices[(i+2)%5],pol.vertices[(i+3)%5]],
          {fillColor:'#093083', highlightFillColor:'#093083', fillOpacity:1.0, highlightFillOpacity:1.0,
          strokeWidth:0});
}
var C = brd.create('point',[-2,-2]);
var D = brd.create('point',[function(){
                            var p = A.Dist(B);
                            return C.X()+3*(1+Math.sqrt(5))/2/5*p;
                            },
                            function(){
                            return C.Y();
                            }
                          ]);
var pol3 = brd.create('regularpolygon',[C,D,3], {withLines:false, fillColor:'#e8501f', highlightFillColor:'#e8501f'});
for (i=0;i<3;i++) {
    brd.create('arc',[pol3.vertices[i],
                      pol3.vertices[(i+1)%3],
                      pol3.vertices[(i+2)%3]],
            {strokeColor:'#e8501f'});
    brd.create('sector',[pol3.vertices[i],
                      pol3.vertices[(i+1)%3],
                      pol3.vertices[(i+2)%3]],
            {fillColor:'#e8501f', highlightFillColor:'#e8501f',fillOpacity:1.0, highlightFillOpacity:1.0,
              strokeWidth:0});
}
brd.unsuspendUpdate();
</source>
</source>


[[Category:Examples]]
[[Category:Examples]]
[[Category:Geometry]]
[[Category:Geometry]]

Revision as of 12:10, 2 October 2010

The underlying JavaScript code

coming soon...