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1
30
31 package com.jgoodies.animation.renderer;
32
33 import java.awt.Color  ;
34 import java.awt.Graphics2D ;
35 import java.awt.Shape ;
36 import java.awt.geom.GeneralPath ;
37 import java.awt.geom.Point2D ;
38 import java.util.Random ;
39
40 import com.jgoodies.animation.AnimationRenderer;
41
42
43
52 public final class FanRenderer implements AnimationRenderer {
53
54 private static final Random random = new Random (System.currentTimeMillis());
55
56
57 private final Triangle[] triangles;
58
59 private Point2D origin;
60 private double rotation;
61
62
63 public FanRenderer(Triangle[] triangles) {
64 this.triangles = triangles;
65 }
66
67
68 public FanRenderer(int triangleCount, Color baseColor) {
69 this(createSectors(triangleCount, baseColor));
70 }
71
72
73 public static Triangle[] createSectors(int count, Color baseColor) {
74 Triangle[] result = new Triangle[count];
75 double sectorAngle = Math.PI * 2 / count;
76
77 for (int i = 0; i < count; i++) {
78 double rotation = i * sectorAngle + (random.nextFloat() - 0.5) * Math.PI/10;
79 double angle = sectorAngle * (0.2 + random.nextFloat() * 0.4);
80 result[i] = new Triangle(rotation, angle, nextColor(baseColor));
81 }
82 return result;
83 }
84
85 private static Color nextColor(Color baseColor) {
86 float[] hsb = new float[3];
87 Color.RGBtoHSB(baseColor.getRed(), baseColor.getGreen(), baseColor.getBlue(), hsb);
88 float brightness = 0.8f + random.nextFloat() * 0.2f;
89 return Color.getHSBColor(hsb[0], hsb[1], brightness);
90 }
91
92
93 public Point2D getOrigin() { return origin; }
94 public void setOrigin(Point2D origin) { this.origin = origin; }
95 public double getRotation() { return rotation; }
96 public void setRotation(double rotation) { this.rotation = rotation; }
97
98
99 public void render(Graphics2D g2, int width, int height) {
100 double radius = Math.sqrt(width * width + height * height);
101
102 Point2D p = getOrigin() != null ? getOrigin() : getDefaultOrigin(width, height);
103
104 g2.translate(p.getX(), p.getY());
105 g2.rotate(rotation);
106 for (int i = 0; i < triangles.length; i++) {
107 triangles[i].render(g2, radius);
108 }
109 g2.rotate(-rotation);
110 g2.translate(-p.getX(), -p.getY());
111 }
112
113
114 private Point2D getDefaultOrigin(int width, int height) {
115 return new Point2D.Double (width * 0.75, height * 0.75);
116 }
117
118
119
121
122 private static class Triangle {
124
125 private final double aRotation;
126 private final double angle;
127 private final Color color;
128
129 private Triangle(double rotation, double angle, Color color) {
130 this.aRotation = rotation;
131 this.angle = angle;
132 this.color = color;
133 }
134
135 private static Shape createPolygon(double rotation, double angle, double radius) {
136 double startAngle = rotation - angle / 2;
137 double stopAngle = startAngle + angle;
138 double hypothenusis = radius / Math.cos(angle / 2);
139
140 float x0 = 0.0f;
141 float y0 = 0.0f;
142 float x1 = (float) (x0 - hypothenusis * Math.cos(startAngle));
143 float y1 = (float) (y0 - hypothenusis * Math.sin(startAngle));
144 float x2 = (float) (x0 - hypothenusis * Math.cos(stopAngle));
145 float y2 = (float) (y0 - hypothenusis * Math.sin(stopAngle));
146
147 GeneralPath polygon = new GeneralPath (GeneralPath.WIND_EVEN_ODD, 3);
148 polygon.moveTo(x0, y0);
149 polygon.lineTo(x1, y1);
150 polygon.lineTo(x2, y2);
151 polygon.closePath();
152
153 return polygon;
154 }
155
156 void render(Graphics2D g2, double radius) {
157 g2.setColor(color);
158 g2.fill(createPolygon(aRotation, angle, radius));
159 }
160 }
161
162 } |
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