Reuleaux pentagon: Difference between revisions
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===The underlying JavaScript code=== | ===The underlying JavaScript code=== | ||
<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]}); | var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-5,5,5,-5]}); | ||
brd.suspendUpdate(); | |||
var A = brd.create('point',[-2,-2]); | var A = brd.create('point',[-2,-2]); | ||
var B = brd.create('point',[2,-2]); | var B = brd.create('point',[2,-2]); | ||
var pol = brd.create('regularpolygon',[A,B,5], {withLines:false}); | var pol = brd.create('regularpolygon',[A,B,5], {withLines:false, fillColor:'#093083', highlightFillColor:'#093083'}); | ||
for (var i=0;i<5;i++) { | for (var i=0;i<5;i++) { | ||
brd.create('arc',[pol.vertices[i],pol.vertices[(i+2)%5],pol.vertices[(i+3)%5]]); | 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',[- | var C = brd.create('point',[-2,-2]); | ||
var D = brd.create('point',[1, | var D = brd.create('point',[function(){ | ||
var pol3 = brd.create('regularpolygon',[C,D,3], {withLines:false}); | 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++) { | for (i=0;i<3;i++) { | ||
brd.create('arc',[pol3.vertices[i], | brd.create('arc',[pol3.vertices[i], | ||
pol3.vertices[(i+1)%3], | pol3.vertices[(i+1)%3], | ||
pol3.vertices[(i+2)%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 07:14, 30 September 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();