Reuleaux pentagon: Difference between revisions

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<jsxgraph width="600" height="600">
<jsxgraph width="600" height="600">
JXG.Options.layer.polygon = 8;
JXG.Options.layer.sector = 8;
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-5,5,5,-5]});
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-5,5,5,-5]});
brd.suspendUpdate();
brd.suspendUpdate();
Line 49: Line 46:
// Triangle
// Triangle
var C = brd.create('point',[-2,-2]);
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 D = brd.create('point',[
var D = brd.create('point',[
                             C.X()+3*(1+Math.sqrt(5))/2/5*A.Dist(B),
                             C.X()+3*(1+Math.sqrt(5))/2/5*A.Dist(B),
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};
};


var rol = createRoulette(reuleauxPentagon, reuleauxTriangle, 6*Math.PI/5, Math.PI/20, 100, [C,D]); //.start();
var rol = createRoulette(reuleauxPentagon, reuleauxTriangle, 6*Math.PI/5, Math.PI/20, 50, [C,D]); //.start();
 
 
 
 
</jsxgraph>
</jsxgraph>



Revision as of 12:08, 2 October 2010

The underlying JavaScript code

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();