Hi all,
I have begun recently to use GeoTools. I want to draw several deviational
ellipses and calculate next their intersection and union. I found the
methods for calculating the union and intersection within the Geometry
Class. However, I have some trouble to draw the ellipses.
I wrote a code to obtain five double values for creating the ellipse:
1) the X center point of the ellipse;
2) the Y center point of the ellipse;
3) the semi major axis length of the ellipse;
4) the semi minor axis length of the ellipse;
5) the rotation of the ellipse expressed in degree and measured from North
(azimuth).
Which method is it possible to use for creating an ellipse by using these
five parameters?
I found an amazing class (GeometryBuilder Class org.geotools.geometry.jts;
http://docs.geotools.org/stable/javadocs/org/geotools/geometry/jts/GeometryBuilder.html),
but I don't understand some parameters of the Ellipse method:
*ellipse*(double x1, double y1,double x2, double y2, int nsides)
Creates an elliptical Polygon from a bounding box with a given number of
sides.
What does mean the *nsides *parameter? It is not the rotation because it is
expressed as Integer. Anybody knows how to calculate the coordinates of the
bounding box, and the nsides with the five parameters mentioned above.
Many thanks in advance,
Philippe Apparicio
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