1    package npw;
2    
3    import painter.SPainter;
4    import shapes.SCircle;
5    
6    
7    import javax.swing.*;
8    import java.awt.*;
9    import java.util.Random;
10   import java.util.Scanner;
11   
12   public class SimpleDots {
13   
14       private void paintTheImage(){
15           // Get the input information
16           int radius = getNumber("circle radius");
17           int radius2 = getNumber("individual circle radius");
18           String colorChosen = getColor("Color of dots?");
19   
20           // Establish the painter
21           SPainter painter = new SPainter("Simple Dots", radius*2+50, radius*2+50);
22           painter.setBrushWidth(3);
23           SCircle circle = new SCircle(radius);
24           SCircle circle2 = new SCircle(radius2);
25           if (colorChosen.equalsIgnoreCase("red")) {
26               painter.setColor(Color.red);
27           }else if (colorChosen.equalsIgnoreCase("blue")) {
28               painter.setColor(Color.blue);
29           }else if (colorChosen.equalsIgnoreCase("green")) {
30               painter.setColor(Color.green);
31           }else{
32               painter.setColor(Color.black);
33           }
34   
35   
36           // Paint the circles
37           paintCircleOfCircles(painter, circle, circle2);
38       }
39   
40       private String getColor(String p) {
41           String nss = JOptionPane.showInputDialog(null, p+"?");
42           Scanner scanner = new Scanner(nss);
43           return scanner.next();
44       }
45   
46   
47   
48       private void paintCircleOfCircles(SPainter painter, SCircle circle, SCircle circle2){
49           // Position the painter to begin drawing the rows
50           painter.mfd(circle.radius());
51           painter.tr();
52           // Paint the circle of circles
53           double moved = 0;
54           while (moved < circle.diameter()) {
55               double chord = chordLength(circle.radius() - moved, circle);
56               int circles = circlesOnLineCount(chord, circle2.radius());
57               paintRow(painter, circle2, circles);
58               nextRow(painter, circle2.radius());
59               moved = moved + circle2.radius();
60           }
61           // Make the method invariant with respect to painter position
62           painter.tl();
63           painter.mfd(circle.radius());
64       }
65   
66       // Move to the next row
67       private void nextRow(SPainter painter, double rowHeight){
68           painter.tr();
69           painter.mfd(rowHeight);
70           painter.tl();
71       }
72   
73       // Assumes the painter is at the center of the row to paint, facing right.
74       private void paintRow(SPainter painter, SCircle circle2, int circlesToPaint){
75           // Move backward 1/2 of the length we're painting to get ready to paint the row.
76           double centerOffset = ( (circlesToPaint * circle2.radius()) / 2) - circle2.radius()/2;
77           painter.mbk(centerOffset);
78   
79           // Paint the row of circles.
80           int painted = 0;
81           while (painted < circlesToPaint){
82               paintOneCircle(painter, circle2);
83               painter.mfd(circle2.radius());
84               painted = painted + 1;
85           }
86   
87           // Make the method invariant with respect to painter position.
88           painter.mbk(centerOffset + circle2.radius());
89       }
90   
91       private void paintOneCircle(SPainter painter, SCircle circle2) {
92   
93           circle2.s5();
94           painter.paint(circle2);
95           circle2.x5();
96   
97   
98   
99   
100  
101  
102  
103  
104  
105  
106  
107  
108  
109  
110      }
111  
112      private static int circlesOnLineCount(double lineLength, double sideLength){
113          int circles = ( (int)Math.ceil( ( lineLength - sideLength ) / sideLength ) + 1);
114          return circles;
115      }
116  
117      private double chordLength(double yOffset, SCircle circle){
118          double xLength = Math.sqrt(Math.pow(circle.radius(), 2) - Math.pow(yOffset, 2));
119          double chordLength = xLength * 2;
120          return chordLength;
121      }
122  
123      private static int getNumber(String prompt) {
124          String nss = JOptionPane.showInputDialog(null,prompt+"?");
125          Scanner scanner = new Scanner(nss);
126          return scanner.nextInt();
127      }
128  
129  
130  
131      public SimpleDots() {
132          paintTheImage();
133      }
134  
135      public static void main(String[] args) {
136          SwingUtilities.invokeLater(new Runnable() {
137              public void run() {
138                  new SimpleDots();
139              }
140          });
141      }
142  }