Reuleaux pentagon: Difference between revisions
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A WASSERMANN (talk | contribs) No edit summary |
A WASSERMANN (talk | contribs) No edit summary |
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<jsxgraph width="600" height="600"> | <jsxgraph width="600" height="600"> | ||
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',[ | 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), | ||
Line 151: | Line 138: | ||
}; | }; | ||
var rol = createRoulette(reuleauxPentagon, reuleauxTriangle, 6*Math.PI/5, Math.PI/20, | 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();