import java.util.*;

public class TMatlas extends PointLayout {

	public String getFrame(int which){
		if(which == 1) return "RA---";
		else           return "DEC--";
	}

	public Vector getPoints (String atlasParam) {
		double delta, dec, dech;
		Vector3d v;
		Vector points = new Vector();

		try {
			delta = Double.parseDouble(atlasParam);
		} catch (NumberFormatException e) {
			System.out.println("Cannot parse Delta from " + atlasParam);
			delta = 5.0;
			System.out.println("Using 5 degrees");
		}

// Tom McGlynn's code for building a point layout
		int ndec = 1 + (int)(180/delta  + 0.5);
		double ddec = 180.0/(ndec-1);

		int nra;
		double dra;

		for(int i=0; i<ndec; i++){
			dec = -90 + i*ddec;

// Change by RW: This prevents gaps in the rings near the pols
			if(dec<0) dech=dec+0.5*ddec;
			else      dech=dec-0.5*ddec;

			nra = (int)((360/delta) * Math.cos(dech*Math.PI/180)) + 1;

			if(i==0 || i==ndec-1)
				nra=1;

			dra = 360.0/nra;
			for(int j=0; j<nra; j++){
				v = new Vector3d(dra*j, dec);
				points.addElement(v);
			}
		}
		return points;
	}
}