1    /* 
2     * A program to paint, centered on the canvas, a circle of randomly colored, black-framed squares. 
3     */
4    
5    package npw;
6    
7    import painter.SPainter;
8    import shapes.SCircle;
9    import shapes.SSquare;
10   
11   import javax.swing.*;
12   import java.awt.*;
13   import java.util.Random;
14   import java.util.Scanner;
15   
16   public class HirstCircle {
17   
18       private void paintTheImage(){
19           // Get the input information
20           int radius = getNumber("circle radius");
21           int radius2 = getNumber("circle diameter length");
22   
23           // Establish the painter
24           SPainter painter = new SPainter("Circle of Circles", radius*2+50, radius*2+50);
25           painter.setBrushWidth(3);
26           SCircle circle = new SCircle(radius);
27           SCircle circle1 = new SCircle(radius2);
28           SSquare square = new SSquare(radius2);
29           double divisor = (radius2*.0033);
30           System.out.println("d" + divisor);
31   
32   
33   
34           // Paint the squares
35   
36           paintCircleOfSquares(painter, circle1, circle, divisor);
37       }
38   
39       private void paintCircleOfSquares(SPainter painter, SCircle circle1, SCircle circle, double divisor){
40           // Position the painter to begin drawing the rows
41           painter.mfd(circle.radius());
42           painter.tr();
43   
44           // Paint the circle of squares
45           double moved = 0;
46           while (moved < circle.diameter()) {
47               double chord = chordLength(circle.radius() - moved, circle);
48               double number = circle.diameter() * divisor;
49               int squares = squaresOnLineCount(chord, circle.diameter(), number);
50   
51               System.out.println("chord" + chord);
52   
53               paintRow(painter, circle1, squares);
54               nextRow(painter, circle1.diameter());
55               System.out.println("moved " + moved);
56               moved = moved + circle1.diameter();
57           }
58   
59           // Make the method invariant with respect to painter position
60           painter.tl();
61           painter.mfd(circle.radius());
62       }
63   
64       // Move to the next row
65       private void nextRow(SPainter painter, double rowHeight){
66           painter.tr();
67           painter.mfd(rowHeight);
68           painter.tl();
69       }
70   
71       // Assumes the painter is at the center of the row to paint, facing right.////////////////////////////////
72       private void paintRow(SPainter painter, SCircle circle1, int squaresToPaint){
73   
74           // Move backward 1/2 of the length we're painting to get ready to paint the row.
75           double centerOffset = ( (squaresToPaint * circle1.diameter()) / 2) - circle1.diameter()/2;
76           painter.mbk(centerOffset);
77   
78           System.out.println("squarestopaint " + squaresToPaint);
79           System.out.println("COffset " + centerOffset);
80   
81           // Paint the row of squares.
82           int painted = 0;
83           while (painted < squaresToPaint){
84               paintOneSquare(painter, circle1);
85               painter.mfd(circle1.diameter());
86               painted = painted + 1;
87           }
88   
89           // Make the method invariant with respect to painter position.
90           painter.mbk(centerOffset + circle1.diameter());
91       }
92   
93       private void paintOneSquare(SPainter painter, SCircle circle1){
94           painter.setColor(randomColor());
95           circle1.s2();
96           painter.paint(circle1);
97           circle1.x2();
98       }
99   
100      private static int squaresOnLineCount(double lineLength, double sideLength, double number){
101          int squares = ( (int)Math.ceil( ( lineLength / ((number)) )));
102          System.out.println("lineL" + lineLength);
103          System.out.println("Sqr " + squares);
104          return squares;
105      }
106  
107      private double chordLength(double yOffset, SCircle circle){
108          double xLength = Math.sqrt(Math.pow(circle.radius(), 2) - Math.pow(yOffset, 2));
109          double chordLength = xLength * 2;
110          return chordLength;
111      }
112  
113      private static int getNumber(String prompt) {
114          String nss = JOptionPane.showInputDialog(null,prompt+"?");
115          Scanner scanner = new Scanner(nss);
116          return scanner.nextInt();
117      }
118  
119      private static Color randomColor() {
120          Random rgen = new Random();
121          int r = rgen.nextInt(256);
122          int g = rgen.nextInt(256);
123          int b = rgen.nextInt(256);
124          return new Color(r,g,b);
125      }
126  
127      public HirstCircle() {
128          paintTheImage();
129      }
130  
131      public static void main(String[] args) {
132          SwingUtilities.invokeLater(new Runnable() {
133              public void run() {
134                  new HirstCircle();
135              }
136          });
137      }
138  }