/**
 * 
 */
package analyze;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;

/**
 * @author John H. Krantz
 * version 0.1
 *
 */
public class PlotLines {
	public PlotLines(){}  // empty constructor
	
	public double [] plotLines(Graphics2D g2d,
			Rectangle2D rfLoc, double val, double peakOrient,
			double maxVal, double minVal,
			boolean weightLines, 
			double threshold,
			boolean weightFromThresh){
		g2d.setPaint(Color.white);
		float stk = 0;
		// find the cter of the box
		double ctrX = rfLoc.getCenterX();
		double ctrY = rfLoc.getCenterY();
		double agl = Math.PI*peakOrient/180.0;
		double hs = rfLoc.getHeight()/2;
		// determine the weight of the line
		g2d.setStroke(new BasicStroke(1.0f));
		if (weightLines & agl >= 0){
			stk = (float)(val/maxVal); 
			if (weightFromThresh){
				stk = (float)((val-threshold)/(maxVal-threshold));
			}
			if (stk <= 0) stk = 0;
			g2d.setPaint(new Color(stk,stk,stk));
		}
		if (agl < 0){
			g2d.setPaint(Color.red);
//			agl = -(agl-Math.PI);
			// line weights for negative angles
			if (weightLines){
				stk = (float)(-val/-minVal);
				if (weightFromThresh){
					stk = (float)(((-val)-threshold)/((-minVal)-threshold));
				}
				if (stk <= 0) stk = 0;
				g2d.setPaint(new Color(stk,0.0f,0.0f));
			}
		}
		// move to the center of the box being drawn
		g2d.translate(ctrX,ctrY);
		// rotate the angle
		g2d.rotate(agl);
		// draw the line
		g2d.draw(new Line2D.Double(
				0,-hs,0,+hs));
		// rotate back
		g2d.rotate(-agl);
		// move back to upter left
		g2d.translate(-ctrX,-ctrY);
		double [] output = new double [2];
		output[PlotOutput.ANGLE] = peakOrient;
		output[PlotOutput.ACTIVITY] = val;
		
		return output;
	}  // end drawing line
}