Reuleaux pentagon: Difference between revisions
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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(); | ||
// Pentagon | // Pentagon | ||
var A = brd.create('point',[-2,-2]); | var A = brd.create('point',[-2,-2]); | ||
Line 29: | Line 26: | ||
brd.unsuspendUpdate(); | brd.unsuspendUpdate(); | ||
var rol = JXG.Math.Numerics.createRoulette(reuleauxPentagon, reuleauxTriangle, 6*Math.PI/5, Math.PI/90, -1, 10, [C,D]); </jsxgraph> | var rol = JXG.Math.Numerics.createRoulette(reuleauxPentagon, reuleauxTriangle, 6*Math.PI/5, Math.PI/90, -1, 10, [C,D]); | ||
</jsxgraph> | |||
===The underlying JavaScript code=== | ===The underlying JavaScript code=== | ||
<source lang="javascript"> | <source lang="javascript"> | ||
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-5,5,5,-5]}); | |||
brd.suspendUpdate(); | |||
// Pentagon | |||
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:'none', highlightFillColor:'none'}); | |||
var reuleauxPentagon = brd.create('curve', JXG.Math.Numerics.reuleauxPolygon(pol.vertices, 5), | |||
{color:'#093083', highlightFillColor:'#093083'}); | |||
// Triangle | |||
var C = brd.create('point',[-2,-2]); | |||
var D = brd.create('point',[C.X()+3*(1+Math.sqrt(5))/2/5*A.Dist(B), C.Y()]); | |||
var pol3 = brd.create('regularpolygon',[C,D,3], {withLines:false, fillColor:'#e8501f', highlightFillColor:'#e8501f'}); | |||
var reuleauxTriangle = brd.create('curve', JXG.Math.Numerics.reuleauxPolygon(pol3.vertices, 3), | |||
{color:'#e8501f', highlightFillColor:'#e8501f'}); | |||
brd.unsuspendUpdate(); | |||
var rol = JXG.Math.Numerics.createRoulette(reuleauxPentagon, reuleauxTriangle, 6*Math.PI/5, Math.PI/90, -1, 10, [C,D]); | |||
</source> | </source> | ||
Revision as of 20:33, 2 October 2010
The underlying JavaScript code
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-5,5,5,-5]});
brd.suspendUpdate();
// Pentagon
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:'none', highlightFillColor:'none'});
var reuleauxPentagon = brd.create('curve', JXG.Math.Numerics.reuleauxPolygon(pol.vertices, 5),
{color:'#093083', highlightFillColor:'#093083'});
// Triangle
var C = brd.create('point',[-2,-2]);
var D = brd.create('point',[C.X()+3*(1+Math.sqrt(5))/2/5*A.Dist(B), C.Y()]);
var pol3 = brd.create('regularpolygon',[C,D,3], {withLines:false, fillColor:'#e8501f', highlightFillColor:'#e8501f'});
var reuleauxTriangle = brd.create('curve', JXG.Math.Numerics.reuleauxPolygon(pol3.vertices, 3),
{color:'#e8501f', highlightFillColor:'#e8501f'});
brd.unsuspendUpdate();
var rol = JXG.Math.Numerics.createRoulette(reuleauxPentagon, reuleauxTriangle, 6*Math.PI/5, Math.PI/90, -1, 10, [C,D]);