package npw; import painter.SPainter; import shapes.SCircle; import shapes.SSquare; import javax.swing.*; import java.awt.*; import java.util.Random; import java.util.Scanner; public class HirstDots { public void paintTheImage (){ int radius = getNumber ("circle radius"); // create a new method: getnumber int dotradius = getNumber ("dot radius"); SPainter painter = new SPainter("Circle of Squares",radius*2+50,radius*2+50); painter.setBrushWidth(3); SCircle circle = new SCircle(radius); SCircle dot = new SCircle(dotradius); paintCircleOfDot(painter,circle,dot);//create a new method: paintCircleOfSquare } private void paintCircleOfDot(SPainter painter, SCircle circle, SCircle dot) { painter.mfd(circle.radius()); painter.tr(); double moved = 0; while (moved < circle.diameter()){ double chord = chordLength(circle.radius()-moved,circle);//create a new method: chordLength int dots = dotOnLineCount(chord,dot.diameter());//create a new method squareOnLineCount paintRow(painter,dot,dots); // create a new method paintRow nextRow(painter,dot.diameter()); // create a new method nextRow moved = moved +dot.diameter(); } painter.tl(); painter.mfd(circle.radius()); } private void nextRow(SPainter painter, double rowHeight) { painter.tr(); painter.mfd(rowHeight); painter.tl(); } private void paintRow(SPainter painter, SCircle dot, int dotsToPaint) { double centerOffset = ((dotsToPaint* dot.diameter())/2)-dot.diameter()/2; painter.mbk(centerOffset); int painted = 0; while (painted<dotsToPaint){ paintOneDot(painter,dot); painter.mfd(dot.diameter()); painted = painted + 1; } painter.mbk(centerOffset + dot.diameter()); } private void paintOneDot(SPainter painter, SCircle dot) { painter.setColor(randomColor()); dot.s2(); painter.paint(dot); painter.draw(dot); dot.x2(); } private static int dotOnLineCount(double lineLength, double sideLength) { int dots = ((int)Math.ceil((lineLength - sideLength)/sideLength)+1); return dots; } private double chordLength(double yOffset, SCircle circle) { double xLength = Math.sqrt(Math.pow(circle.radius(),2)-Math.pow(yOffset,2)); double chordLength = xLength*2; return chordLength; } private static int getNumber(String prompt) { String nss = JOptionPane.showInputDialog(null,prompt+"?"); Scanner scanner = new Scanner (nss); return scanner.nextInt(); } private static Color randomColor() { Random rgen = new Random(); int r = rgen.nextInt(256); int g = rgen.nextInt(256); int b = rgen.nextInt(256); return new Color(r,g,b); } public HirstDots(){ paintTheImage(); } public static void main (String [] args){ SwingUtilities.invokeLater(new Runnable(){ public void run (){ new HirstDots(); } }); } }