1 /*
2 *
3 * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * - Neither the name of Oracle nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
21 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32 package java2d.demos.Arcs_Curves;
33
34
35 import java.awt.*;
36 import java.awt.geom.Arc2D;
37 import java.awt.geom.AffineTransform;
38 import java2d.AnimatingSurface;
39 import static java.awt.Color.*;
40
41
42 /**
43 * Arc2D Open, Chord & Pie arcs; Animated Pie Arc.
44 */
45 @SuppressWarnings("serial")
46 public class Arcs extends AnimatingSurface {
47
48 private static String[] types = { "Arc2D.OPEN", "Arc2D.CHORD", "Arc2D.PIE" };
49 private static final int CLOSE = 0;
50 private static final int OPEN = 1;
51 private static final int FORWARD = 0;
52 private static final int BACKWARD = 1;
53 private static final int DOWN = 2;
54 private static final int UP = 3;
55 private int aw, ah; // animated arc width & height
56 private int x, y;
57 private int angleStart = 45;
58 private int angleExtent = 270;
59 private int mouth = CLOSE;
60 private int direction = FORWARD;
61
62 public Arcs() {
63 setBackground(WHITE);
64 }
65
66 @Override
67 public void reset(int w, int h) {
68 x = 0;
69 y = 0;
70 aw = w / 12;
71 ah = h / 12;
72 }
73
74 @Override
75 public void step(int w, int h) {
76 // Compute direction
77 if (x + aw >= w - 5 && direction == FORWARD) {
78 direction = DOWN;
79 }
80 if (y + ah >= h - 5 && direction == DOWN) {
81 direction = BACKWARD;
82 }
83 if (x - aw <= 5 && direction == BACKWARD) {
84 direction = UP;
85 }
86 if (y - ah <= 5 && direction == UP) {
87 direction = FORWARD;
88 }
89
90 // compute angle start & extent
91 if (mouth == CLOSE) {
92 angleStart -= 5;
93 angleExtent += 10;
94 }
95 if (mouth == OPEN) {
96 angleStart += 5;
97 angleExtent -= 10;
98 }
99 if (direction == FORWARD) {
100 x += 5;
101 y = 0;
102 }
103 if (direction == DOWN) {
104 x = w;
105 y += 5;
106 }
107 if (direction == BACKWARD) {
108 x -= 5;
109 y = h;
110 }
111 if (direction == UP) {
112 x = 0;
113 y -= 5;
114 }
115 if (angleStart == 0) {
116 mouth = OPEN;
117 }
118 if (angleStart > 45) {
119 mouth = CLOSE;
120 }
121 }
122
123 @Override
124 public void render(int w, int h, Graphics2D g2) {
125
126 // Draw Arcs
127 g2.setStroke(new BasicStroke(5.0f));
128 for (int i = 0; i < types.length; i++) {
129 Arc2D arc = new Arc2D.Float(i);
130 arc.setFrame((i + 1) * w * .2, (i + 1) * h * .2, w * .17, h * .17);
131 arc.setAngleStart(45);
132 arc.setAngleExtent(270);
133 g2.setColor(BLUE);
134 g2.draw(arc);
135 g2.setColor(GRAY);
136 g2.fill(arc);
137 g2.setColor(BLACK);
138 g2.drawString(types[i], (int) ((i + 1) * w * .2), (int) ((i + 1) * h
139 * .2 - 3));
140 }
141
142 // Draw Animated Pie Arc
143 Arc2D pieArc = new Arc2D.Float(Arc2D.PIE);
144 pieArc.setFrame(0, 0, aw, ah);
145 pieArc.setAngleStart(angleStart);
146 pieArc.setAngleExtent(angleExtent);
147 AffineTransform at = AffineTransform.getTranslateInstance(x, y);
148 switch (direction) {
149 case DOWN:
150 at.rotate(Math.toRadians(90));
151 break;
152 case BACKWARD:
153 at.rotate(Math.toRadians(180));
154 break;
155 case UP:
156 at.rotate(Math.toRadians(270));
157 }
158 g2.setColor(BLUE);
159 g2.fill(at.createTransformedShape(pieArc));
160 }
161
162 public static void main(String[] argv) {
163 createDemoFrame(new Arcs());
164 }
165 }