Difference between revisions of "Bezier curves"

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Line 1: Line 1:
 
<jsxgraph width="600" height="600">
 
<jsxgraph width="600" height="600">
brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-4,4,4,-4],keepaspectratio:true});
+
var brd = JXG.JSXGraph.initBoard('jxgbox',{boundingbox:[-4,4,4,-4],keepaspectratio:true});
 +
 
 +
var p = [];
 +
 
 +
col = 'red';
 +
p.push(brd.createElement('point',[2,1],{strokeColor:col,fillColor:col}));        // data point
 +
col = 'blue';
 +
p.push(brd.createElement('point',[0.75,2.5,1],{strokeColor:col,fillColor:col})); // control point
 +
p.push(brd.createElement('point',[-0.3,0.3],{strokeColor:col,fillColor:col}));  // control point
 +
 
 +
col = 'red';
 +
p.push(brd.createElement('point',[-3,1],{strokeColor:col,fillColor:col}));      // data point
 +
col = 'blue';
 +
p.push(brd.createElement('point',[-0.75,-2.5,1],{strokeColor:col,fillColor:col})); // control point
 +
p.push(brd.createElement('point',[1.5,-2.8],{strokeColor:col,fillColor:col}));    // control point
 +
 
 +
col = 'red';
 +
p.push(brd.createElement('point',[2,-0.5],{strokeColor:col,fillColor:col}));      // data point
 +
 
 +
var c = board.createElement('curve', JXG.Math.Numerics.bezier(p),{strokecolor:'blue', strokeOpacity:0.8, strokeWidth:3});
 +
 
 
</jsxgraph>
 
</jsxgraph>

Revision as of 09:51, 28 September 2009