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14  * version 2 for more details (a copy is included in the LICENSE file that
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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 
Edge(Curve c, int ctag)38     public Edge(Curve c, int ctag) {
39         this(c, ctag, AreaOp.ETAG_IGNORE);
40     }
41 
Edge(Curve c, int ctag, int etag)42     public Edge(Curve c, int ctag, int etag) {
43         this.curve = c;
44         this.ctag = ctag;
45         this.etag = etag;
46     }
47 
getCurve()48     public Curve getCurve() {
49         return curve;
50     }
51 
getCurveTag()52     public int getCurveTag() {
53         return ctag;
54     }
55 
getEdgeTag()56     public int getEdgeTag() {
57         return etag;
58     }
59 
setEdgeTag(int etag)60     public void setEdgeTag(int etag) {
61         this.etag = etag;
62     }
63 
getEquivalence()64     public int getEquivalence() {
65         return equivalence;
66     }
67 
setEquivalence(int eq)68     public void setEquivalence(int eq) {
69         equivalence = eq;
70     }
71 
72     private Edge lastEdge;
73     private int lastResult;
74     private double lastLimit;
75 
compareTo(Edge other, double[] yrange)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 
record(double yend, int etag)107     public void record(double yend, int etag) {
108         this.activey = yend;
109         this.etag = etag;
110     }
111 
isActiveFor(double y, int etag)112     public boolean isActiveFor(double y, int etag) {
113         return (this.etag == etag && this.activey >= y);
114     }
115 
toString()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 }
126