Difference between revisions of "Ellipsis"
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var board = JXG.JSXGraph.initBoard('jxgbox', { boundingbox: [-5, 5, 5, -5], axis: true, showClearTraces: true}); | var board = JXG.JSXGraph.initBoard('jxgbox', { boundingbox: [-5, 5, 5, -5], axis: true, showClearTraces: true}); | ||
− | var f1 = board.create('glider', [-2, 0, board.defaultAxes.x], {name:"f"}); | + | var f1 = board.create('glider', [-2, 0, board.defaultAxes.x], {name:"f'"}); |
− | var f2 = board.create('glider', [2, 0, board.defaultAxes.x], {name:"f | + | var f2 = board.create('glider', [2, 0, board.defaultAxes.x], {name:"f"}); |
var ell = board.create('ellipse', [f1, f2, [0,3]]); | var ell = board.create('ellipse', [f1, f2, [0,3]]); | ||
− | var P = board.create('glider', [-1, 2, ell], {name: ' | + | var P = board.create('glider', [-1, 2, ell], {name: 'p'}); |
var s1 = board.create('segment', [f1,P]); | var s1 = board.create('segment', [f1,P]); | ||
var s2 = board.create('segment', [f2,P]); | var s2 = board.create('segment', [f2,P]); | ||
− | var txt = board.create('text', [0.2, 4, () => "| | + | var txt = board.create('text', [0.2, 4, () => "|pf| + |pf'| = " + P.Dist(f1).toFixed(2) + ' + ' + P.Dist(f2).toFixed(2) + ' = ' + (P.Dist(f1) + P.Dist(f2)).toFixed(2)]); |
</jsxgraph> | </jsxgraph> | ||
Line 26: | Line 26: | ||
var board = JXG.JSXGraph.initBoard('jxgbox', { boundingbox: [-5, 5, 5, -5], axis: true, showClearTraces: true}); | var board = JXG.JSXGraph.initBoard('jxgbox', { boundingbox: [-5, 5, 5, -5], axis: true, showClearTraces: true}); | ||
− | var f1 = board.create('glider', [-2, 0, board.defaultAxes.x], {name:"f"}); | + | var f1 = board.create('glider', [-2, 0, board.defaultAxes.x], {name:"f'"}); |
− | var f2 = board.create('glider', [2, 0, board.defaultAxes.x], {name:"f | + | var f2 = board.create('glider', [2, 0, board.defaultAxes.x], {name:"f"}); |
var ell = board.create('ellipse', [f1, f2, [0,3]]); | var ell = board.create('ellipse', [f1, f2, [0,3]]); | ||
− | var P = board.create('glider', [-1, 2, ell], {name: ' | + | var P = board.create('glider', [-1, 2, ell], {name: 'p'}); |
var s1 = board.create('segment', [f1,P]); | var s1 = board.create('segment', [f1,P]); | ||
var s2 = board.create('segment', [f2,P]); | var s2 = board.create('segment', [f2,P]); | ||
− | var txt = board.create('text', [0.2, 4, () => "| | + | var txt = board.create('text', [0.2, 4, () => "|pf| + |pf'| = " + P.Dist(f1).toFixed(2) + ' + ' + P.Dist(f2).toFixed(2) + ' = ' + (P.Dist(f1) + P.Dist(f2)).toFixed(2)]); |
+ | |||
</source> | </source> | ||
[[Category:Examples]] | [[Category:Examples]] | ||
[[Category:Geometry]] | [[Category:Geometry]] |
Latest revision as of 11:23, 29 June 2021
The underlying JavaScript code
JXG.Options.label.autoPosition = true;
JXG.Options.text.fontSize = 16;
JXG.Options.line.strokeWidth = 0.8;
var board = JXG.JSXGraph.initBoard('jxgbox', { boundingbox: [-5, 5, 5, -5], axis: true, showClearTraces: true});
var f1 = board.create('glider', [-2, 0, board.defaultAxes.x], {name:"f'"});
var f2 = board.create('glider', [2, 0, board.defaultAxes.x], {name:"f"});
var ell = board.create('ellipse', [f1, f2, [0,3]]);
var P = board.create('glider', [-1, 2, ell], {name: 'p'});
var s1 = board.create('segment', [f1,P]);
var s2 = board.create('segment', [f2,P]);
var txt = board.create('text', [0.2, 4, () => "|pf| + |pf'| = " + P.Dist(f1).toFixed(2) + ' + ' + P.Dist(f2).toFixed(2) + ' = ' + (P.Dist(f1) + P.Dist(f2)).toFixed(2)]);