openjscad-aurora-webapp

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// title: Rose Curve
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// author: Eduard Bespalov
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// license: MIT License
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// description: testing solidFromSlices()
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function main(params) {
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	var radius = 50,
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		height = 60,
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		vec = new CSG.Vector3D(0, 5, 0),
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		angle;
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	angle = 360 / 5;
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	var pent = CSG.Polygon.createFromPoints([
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			vec,
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			vec.rotateZ(1 * angle),
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			vec.rotateZ(2 * angle),
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			vec.rotateZ(3 * angle),
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			vec.rotateZ(4 * angle)
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		]).rotateY(90).setColor([1,0,0.1]);//.translate([0, radius, 0]);
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	//rose: r = a * sin(k * fi)
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	// k = 5 /3
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	var k = 5 / 3;
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	return pent.solidFromSlices({
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		numslices: 300,
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		loop: true,
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		callback: function(t, slice) {
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			var angle = t * Math.PI * 3,
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				r = radius * Math.sin(k * angle),
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				x = r * Math.cos(angle),
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				y = r * Math.sin(angle),
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				vec = new CSG.Vector3D(x, y, 0);
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				//normal
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				var x1 = radius * (k * Math.cos(k * angle) * Math.cos(angle) - Math.sin(angle) * Math.sin(k * angle)),
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					y1 = radius * (k * Math.cos(k * angle) * Math.sin(angle) + Math.cos(angle) * Math.sin(k * angle)),
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					turn = (new CSG.Vector2D(x1, y1)).angleDegrees();
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			return this.rotateZ(turn).translate(vec);
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		}
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	});
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}
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