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authormark <mark@138bc75d-0d04-0410-961f-82ee72b054a4>2006-05-18 17:29:21 +0000
committermark <mark@138bc75d-0d04-0410-961f-82ee72b054a4>2006-05-18 17:29:21 +0000
commit64089cc9f030d8ef7972adb5d117e0b23f47d62b (patch)
tree9f9c470de62ee62fba1331a396450d728d2b1fad /libjava/classpath/gnu/java/awt/java2d/PolyEdge.java
parent96034e28360d660d7a7708807fcbc4b519574d8e (diff)
downloadgcc-64089cc9f030d8ef7972adb5d117e0b23f47d62b.tar.gz
Imported GNU Classpath 0.90
* scripts/makemake.tcl: LocaleData.java moved to gnu/java/locale. * sources.am: Regenerated. * gcj/javaprims.h: Regenerated. * Makefile.in: Regenerated. * gcj/Makefile.in: Regenerated. * include/Makefile.in: Regenerated. * testsuite/Makefile.in: Regenerated. * gnu/java/lang/VMInstrumentationImpl.java: New override. * gnu/java/net/local/LocalSocketImpl.java: Likewise. * gnu/classpath/jdwp/VMMethod.java: Likewise. * gnu/classpath/jdwp/VMVirtualMachine.java: Update to latest interface. * java/lang/Thread.java: Add UncaughtExceptionHandler. * java/lang/reflect/Method.java: Implements GenericDeclaration and isSynthetic(), * java/lang/reflect/Field.java: Likewise. * java/lang/reflect/Constructor.java * java/lang/Class.java: Implements Type, GenericDeclaration, getSimpleName() and getEnclosing*() methods. * java/lang/Class.h: Add new public methods. * java/lang/Math.java: Add signum(), ulp() and log10(). * java/lang/natMath.cc (log10): New function. * java/security/VMSecureRandom.java: New override. * java/util/logging/Logger.java: Updated to latest classpath version. * java/util/logging/LogManager.java: New override. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@113887 138bc75d-0d04-0410-961f-82ee72b054a4
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+/* PolyEdge.java -- An edge in a polygon, used for polygon filling
+ Copyright (C) 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING. If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library. Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module. An independent module is a module which is not derived from
+or based on this library. If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so. If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.java.awt.java2d;
+
+/**
+ * An edge in a polygon. This is used by the scanline conversion algorithm
+ * implemented in {@link AbstractGraphics2D#rawFillShape}.
+ *
+ * @author Roman Kennke (kennke@aicas.com)
+ */
+public class PolyEdge
+ implements Comparable
+{
+
+ /**
+ * The start and end coordinates of the edge. y0 is always smaller or equal
+ * than y1.
+ */
+ public double x0, y0, x1, y1;
+
+ /**
+ * The slope of the edge. This is dx / dy.
+ */
+ double slope;
+
+ /**
+ * The intersection of this edge with the current scanline.
+ */
+ double xIntersection;
+
+ /**
+ * Creates a new PolyEdge with the specified coordinates.
+ *
+ * @param x0 the starting point, x coordinate
+ * @param y0 the starting point, y coordinate
+ * @param x1 the end point, x coordinate
+ * @param y1 the end point, y coordinate
+ */
+ PolyEdge(double x0, double y0, double x1, double y1)
+ {
+ if (y0 < y1)
+ {
+ this.x0 = x0;
+ this.y0 = y0;
+ this.x1 = x1;
+ this.y1 = y1;
+ }
+ else
+ {
+ this.x0 = x1;
+ this.y0 = y1;
+ this.x1 = x0;
+ this.y1 = y0;
+ }
+ slope = (this.x1 - this.x0) / (this.y1 - this.y0);
+ if (this.y0 == this.y1) // Horizontal edge.
+ xIntersection = Math.min(this.x0, this.x1);
+ else
+ xIntersection = this.x0 + slope * (Math.ceil(this.y0) - this.y0);
+ }
+
+ /**
+ * Sorts PolyEdges by the x coordinate from the minimum x value.
+ */
+ public int compareTo(Object o)
+ {
+ PolyEdge other = (PolyEdge) o;
+ int comp = 0;
+ if (x0 < other.x0)
+ comp = -1;
+ else if (x0 > other.x0)
+ comp = 1;
+ return comp;
+ }
+
+ public String toString()
+ {
+ return "Edge: " + x0 + ", " + y0 + ", " + x1 + ", " + y1 + ", slope: "
+ + slope + ", xIntersection: " + xIntersection;
+ }
+}