Re: How to draw a circle ?

Using Jython, I would just define the points in an array, and then call drawLine with the array. If you're using Java, then I would suggest you construct a Gridded2DSet with a manifold dimension = 1 and put the coordinates in there as the "samples". When you add this Data's reference object to your Display, it will render it as a line connecting the points (this is how lines are drawn). So...something like this:

float[][] samples = new float[2][361];
// fill up sampls with 361 values -- one degree, for example, around
Gridded2DSet cir = new Gridded2DSet(yourMathType, samples, 361)
DataReference cirref = new DataReference("circle");
cirref.setData(cir.getData());

tom


Helen Yi wrote:
Hi

Does anyone know how to draw a circle on a display?

Thanks,

helen


--
Tom Whittaker (tomw@xxxxxxxxxxxxx)
University of Wisconsin-Madison
Space Science and Engineering Center
Cooperative Institute for Meteorological Satellite Studies
Phone/VoiceMail: 608.262.2759