Reuleaux pentagon: Difference between revisions
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var D = brd.create('point',[C.X()+3/5*(1+Math.sqrt(5))*0.5*A.Dist(B), C.Y()]); | var D = brd.create('point',[C.X()+3/5*(1+Math.sqrt(5))*0.5*A.Dist(B), C.Y()]); | ||
var pol3 = brd.create('regularpolygon',[C,D,3], {withLines:false, fillColor:'none', highlightFillColor:'none', fillOpacity:0.0}); | var pol3 = brd.create('regularpolygon',[C,D,3], {withLines:false, fillColor:'none', highlightFillColor:'none', fillOpacity:0.0}); | ||
for (i=0;i<3;i++) pol3.vertices[i].setProperty({color:'#3d1c24'}); | |||
// Heptagon | // Heptagon | ||
Line 28: | Line 29: | ||
var F = brd.create('point',[E.X()+7/5*A.Dist(pol5.vertices[2]), E.Y()]); | var F = brd.create('point',[E.X()+7/5*A.Dist(pol5.vertices[2]), E.Y()]); | ||
var pol7 = brd.create('regularpolygon',[E,F,7], {withLines:false, fillColor:'none', highlightFillColor:'none', fillOpacity:0.0}); | var pol7 = brd.create('regularpolygon',[E,F,7], {withLines:false, fillColor:'none', highlightFillColor:'none', fillOpacity:0.0}); | ||
for (i=0;i<7;i++) pol7.vertices[i].setProperty({color:'#3d1c24'}); | |||
// Create the Reuleauc curves | // Create the Reuleauc curves |
Revision as of 20:04, 3 October 2010
The underlying JavaScript code
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-5,7,5,-3]});
brd.suspendUpdate();
// Pentagon
var A = brd.create('point',[-2,-2]);
var B = brd.create('point',[2,-2]);
var pol5 = brd.create('regularpolygon',[A,B,5], {withLines:false, fillColor:'none', highlightFillColor:'none', fillOpacity:0.0});
// Triangle
var C = brd.create('point',[-2,-2]);
var D = brd.create('point',[C.X()+3/5*(1+Math.sqrt(5))*0.5*A.Dist(B), C.Y()]);
var pol3 = brd.create('regularpolygon',[C,D,3], {withLines:false, fillColor:'#e8501f', highlightFillColor:'#e8501f', fillOpacity:0.0});
// Heptagon
var E = brd.create('point',[-2,-2]);
var F = brd.create('point',[E.X()+7/5*A.Dist(pol5.vertices[2]), E.Y()]);
var pol7 = brd.create('regularpolygon',[E,F,7], {withLines:false, fillColor:'#e8501f', highlightFillColor:'#e8501f', fillOpacity:0.0});
var reuleauxHeptagon = brd.create('curve', JXG.Math.Numerics.reuleauxPolygon(pol7.vertices, 7),
{color:'#e8501f', highlightFillColor:'#e8501f'});
var reuleauxPentagon = brd.create('curve', JXG.Math.Numerics.reuleauxPolygon(pol5.vertices, 5),
{color:'#093083', highlightFillColor:'#093083'});
var reuleauxTriangle = brd.create('curve', JXG.Math.Numerics.reuleauxPolygon(pol3.vertices, 3),
{color:'#e8501f', highlightFillColor:'#e8501f'});
brd.unsuspendUpdate();
//var rol = JXG.Math.Numerics.createRoulette(reuleauxHeptagon, reuleauxPentagon, 6*Math.PI/5, Math.PI/90, -1, 10, [A,B])();
var rol3 = JXG.Math.Numerics.createRoulette(reuleauxPentagon, reuleauxTriangle, 6*Math.PI/5, Math.PI/90, 1, 10, [C,D])();