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.Ellipse2D;
37 import java.awt.geom.Rectangle2D;
38 import java.awt.geom.QuadCurve2D;
39 import java.awt.geom.CubicCurve2D;
40 import java.awt.geom.PathIterator;
41 import java.awt.geom.FlatteningPathIterator;
42 import java.awt.font.TextLayout;
43 import java.awt.font.FontRenderContext;
44 import java2d.Surface;
45 import static java.awt.Color.*;
46 import static java.awt.geom.PathIterator.*;
47
48
49 /**
50 * CubicCurve2D & QuadCurve2D curves includes FlattenPathIterator example.
51 */
52 @SuppressWarnings("serial")
53 public class Curves extends Surface {
54
55 private static Color[] colors = { BLUE, GREEN, RED };
56
57 public Curves() {
58 setBackground(WHITE);
59 }
60
61 @Override
62 public void render(int w, int h, Graphics2D g2) {
63
64 g2.setColor(BLACK);
65 FontRenderContext frc = g2.getFontRenderContext();
66 TextLayout tl = new TextLayout("QuadCurve2D", g2.getFont(), frc);
67 float xx = (float) (w * .5 - tl.getBounds().getWidth() / 2);
68 tl.draw(g2, xx, tl.getAscent());
69
70 tl = new TextLayout("CubicCurve2D", g2.getFont(), frc);
71 xx = (float) (w * .5 - tl.getBounds().getWidth() / 2);
72 tl.draw(g2, xx, h * .5f);
73 g2.setStroke(new BasicStroke(5.0f));
74
75 float yy = 20;
76
77 for (int i = 0; i < 2; i++) {
78 for (int j = 0; j < 3; j++) {
79 Shape shape = null;
80
81 if (i == 0) {
82 shape = new QuadCurve2D.Float(w * .1f, yy, w * .5f, 50, w
83 * .9f, yy);
84 } else {
85 shape = new CubicCurve2D.Float(w * .1f, yy, w * .4f, yy - 15,
86 w * .6f, yy + 15, w * .9f, yy);
87 }
88 g2.setColor(colors[j]);
89 if (j != 2) {
90 g2.draw(shape);
91 }
92
93 if (j == 1) {
94 g2.setColor(LIGHT_GRAY);
95 PathIterator f = shape.getPathIterator(null);
96 while (!f.isDone()) {
97 float[] pts = new float[6];
98 switch (f.currentSegment(pts)) {
99 case SEG_MOVETO:
100 case SEG_LINETO:
101 g2.fill(new Rectangle2D.Float(pts[0], pts[1], 5,
102 5));
103 break;
104 case SEG_CUBICTO:
105 case SEG_QUADTO:
106 g2.fill(new Rectangle2D.Float(pts[0], pts[1], 5,
107 5));
108 if (pts[2] != 0) {
109 g2.fill(new Rectangle2D.Float(pts[2], pts[3],
110 5, 5));
111 }
112 if (pts[4] != 0) {
113 g2.fill(new Rectangle2D.Float(pts[4], pts[5],
114 5, 5));
115 }
116 }
117 f.next();
118 }
119 } else if (j == 2) {
120 PathIterator p = shape.getPathIterator(null);
121 FlatteningPathIterator f =
122 new FlatteningPathIterator(p, 0.1);
123 while (!f.isDone()) {
124 float[] pts = new float[6];
125 switch (f.currentSegment(pts)) {
126 case SEG_MOVETO:
127 case SEG_LINETO:
128 g2.fill(new Ellipse2D.Float(pts[0], pts[1], 3, 3));
129 }
130 f.next();
131 }
132 }
133 yy += h / 6;
134 }
135 yy = h / 2 + 15;
136 }
137 }
138
139 public static void main(String[] argv) {
140 createDemoFrame(new Curves());
141 }
142 }