1 /* 2 * 3 * Copyright (c) 2007, 2011, 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 }