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Path.Constructors: implement Path.Star and add tests.

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This commit is contained in:
Jonathan Puckey 2011-04-12 14:18:00 +02:00
parent bd59e48682
commit 12de77eb42
2 changed files with 32 additions and 0 deletions
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20
src/path/Path.Constructors.js
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@ -125,6 +125,26 @@ Path.inject({ statics: new function() {
}
path.closed = true;
return path;
},
Star: function(center, numPoints, radius1, radius2) {
center = Point.read(arguments, 0);
numPoints *= 2;
var inner = Math.min(radius1, radius2),
outer = Math.max(radius1, radius2),
angle = 360 / numPoints,
outerFirst = radius1 < radius2,
path = new Path();
for (var i = 0; i < numPoints; i++) {
var radius = i % 2 == outerFirst ? outer : inner,
vector = new Point({
angle: -90 + angle * i,
length: radius
});
path.add(center.add(vector));
}
path.closed = true;
return path;
}
};
}});

12
test/tests/Path_Shapes.js
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@ -48,4 +48,16 @@ test('new Path.RegularPolygon(center, numSides, radius)', function() {
var path = new Path.RegularPolygon(new Point(250, 250), 10, 100);
var expectedSegments = [{ point: { x: 219.09814, y: 345.10547 } }, { point: { x: 169.09814, y: 308.77832 } }, { point: { x: 150, y: 250 } }, { point: { x: 169.09814, y: 191.22168 } }, { point: { x: 219.09814, y: 154.89453 } }, { point: { x: 280.90186, y: 154.89453 } }, { point: { x: 330.90186, y: 191.22168 } }, { point: { x: 350, y: 250 } }, { point: { x: 330.90186, y: 308.77832 } }, { point: { x: 280.90186, y: 345.10547 } }];
compareSegmentLists(path.segments, expectedSegments);
});
test('new Path.Star(center, numSides, radius1, radius2)', function() {
var doc = new Document();
var path = new Path.Star(new Point(100, 100), 10, 10, 20);
var expectedSegments = [new Segment(new Point(100, 90)), new Segment(new Point(106.18017578125, 80.97900390625)), new Segment(new Point(105.8779296875, 91.90966796875)), new Segment(new Point(116.18017578125, 88.244140625)), new Segment(new Point(109.5107421875, 96.90966796875)), new Segment(new Point(120, 100)), new Segment(new Point(109.5107421875, 103.09033203125)), new Segment(new Point(116.18017578125, 111.755859375)), new Segment(new Point(105.8779296875, 108.09033203125)), new Segment(new Point(106.18017578125, 119.02099609375)), new Segment(new Point(100, 110)), new Segment(new Point(93.81982421875, 119.02099609375)), new Segment(new Point(94.1220703125, 108.09033203125)), new Segment(new Point(83.81982421875, 111.755859375)), new Segment(new Point(90.4892578125, 103.09033203125)), new Segment(new Point(80, 100)), new Segment(new Point(90.4892578125, 96.90966796875)), new Segment(new Point(83.81982421875, 88.244140625)), new Segment(new Point(94.1220703125, 91.90966796875)), new Segment(new Point(93.81982421875, 80.97900390625))];
compareSegmentLists(path.segments, expectedSegments);
var doc = new Document();
var path = new Path.Star(new Point(100, 100), 5, 20, 10);
var expectedSegments = [new Segment(new Point(100, 80)), new Segment(new Point(105.8779296875, 91.90966796875)), new Segment(new Point(119.02099609375, 93.81982421875)), new Segment(new Point(109.5107421875, 103.09033203125)), new Segment(new Point(111.755859375, 116.18017578125)), new Segment(new Point(100, 110)), new Segment(new Point(88.244140625, 116.18017578125)), new Segment(new Point(90.4892578125, 103.09033203125)), new Segment(new Point(80.97900390625, 93.81982421875)), new Segment(new Point(94.1220703125, 91.90966796875))];
compareSegmentLists(path.segments, expectedSegments);
});