Circle approximation: Difference between revisions
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var p1 = brd.createElement('point',[2,0]); | var p1 = brd.createElement('point',[2,0]); | ||
var circ = brd.createElement('circle',[p0,p1]); | var circ = brd.createElement('circle',[p0,p1]); | ||
var rot = brd.createElement('transform', [function() {return Math.PI*2.0/n.Value();},p0], {type:'rotate'}); // angle, rotation center | |||
var ptmp = brd.createElement('point',[0,0],{visible:false,withLabel:false}); | |||
var c = brd.createElement('circle',[[],[]]); | |||
c.updateDataArray = function() { | c.updateDataArray = function() { | ||
var i; | |||
this.dataX = [p1.X()]; | |||
this.dataY = [p1.Y()]; | |||
ptmp.setPosition(JXG.COORDS_BY_USER,p1.X(),p1.Y()); | |||
for (i=0;i<n.Value();i++) { | |||
rot.applyOnce(ptmp); | |||
this.dataX.push(ptmp.X()]; | |||
this.dataY.push(ptmp.Y()); | |||
} | |||
} | } | ||
</jsxgraph> | </jsxgraph> | ||
