J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.awt.geom; |
| 27 | |
| 28 | final class Edge { |
| 29 | static final int INIT_PARTS = 4; |
| 30 | static final int GROW_PARTS = 10; |
| 31 | |
| 32 | Curve curve; |
| 33 | int ctag; |
| 34 | int etag; |
| 35 | double activey; |
| 36 | int equivalence; |
| 37 | |
| 38 | public Edge(Curve c, int ctag) { |
| 39 | this(c, ctag, AreaOp.ETAG_IGNORE); |
| 40 | } |
| 41 | |
| 42 | public Edge(Curve c, int ctag, int etag) { |
| 43 | this.curve = c; |
| 44 | this.ctag = ctag; |
| 45 | this.etag = etag; |
| 46 | } |
| 47 | |
| 48 | public Curve getCurve() { |
| 49 | return curve; |
| 50 | } |
| 51 | |
| 52 | public int getCurveTag() { |
| 53 | return ctag; |
| 54 | } |
| 55 | |
| 56 | public int getEdgeTag() { |
| 57 | return etag; |
| 58 | } |
| 59 | |
| 60 | public void setEdgeTag(int etag) { |
| 61 | this.etag = etag; |
| 62 | } |
| 63 | |
| 64 | public int getEquivalence() { |
| 65 | return equivalence; |
| 66 | } |
| 67 | |
| 68 | public void setEquivalence(int eq) { |
| 69 | equivalence = eq; |
| 70 | } |
| 71 | |
| 72 | private Edge lastEdge; |
| 73 | private int lastResult; |
| 74 | private double lastLimit; |
| 75 | |
| 76 | public int compareTo(Edge other, double yrange[]) { |
| 77 | if (other == lastEdge && yrange[0] < lastLimit) { |
| 78 | if (yrange[1] > lastLimit) { |
| 79 | yrange[1] = lastLimit; |
| 80 | } |
| 81 | return lastResult; |
| 82 | } |
| 83 | if (this == other.lastEdge && yrange[0] < other.lastLimit) { |
| 84 | if (yrange[1] > other.lastLimit) { |
| 85 | yrange[1] = other.lastLimit; |
| 86 | } |
| 87 | return 0-other.lastResult; |
| 88 | } |
| 89 | //long start = System.currentTimeMillis(); |
| 90 | int ret = curve.compareTo(other.curve, yrange); |
| 91 | //long end = System.currentTimeMillis(); |
| 92 | /* |
| 93 | System.out.println("compare: "+ |
| 94 | ((System.identityHashCode(this) < |
| 95 | System.identityHashCode(other)) |
| 96 | ? this+" to "+other |
| 97 | : other+" to "+this)+ |
| 98 | " == "+ret+" at "+yrange[1]+ |
| 99 | " in "+(end-start)+"ms"); |
| 100 | */ |
| 101 | lastEdge = other; |
| 102 | lastLimit = yrange[1]; |
| 103 | lastResult = ret; |
| 104 | return ret; |
| 105 | } |
| 106 | |
| 107 | public void record(double yend, int etag) { |
| 108 | this.activey = yend; |
| 109 | this.etag = etag; |
| 110 | } |
| 111 | |
| 112 | public boolean isActiveFor(double y, int etag) { |
| 113 | return (this.etag == etag && this.activey >= y); |
| 114 | } |
| 115 | |
| 116 | public String toString() { |
| 117 | return ("Edge["+curve+ |
| 118 | ", "+ |
| 119 | (ctag == AreaOp.CTAG_LEFT ? "L" : "R")+ |
| 120 | ", "+ |
| 121 | (etag == AreaOp.ETAG_ENTER ? "I" : |
| 122 | (etag == AreaOp.ETAG_EXIT ? "O" : "N"))+ |
| 123 | "]"); |
| 124 | } |
| 125 | } |