-package org.simantics.diagram.profile;\r
-/* \r
- * JFreeChart : a free chart library for the Java(tm) platform\r
- * \r
- *\r
- * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.\r
- *\r
- * Project Info: http://www.jfree.org/jfreechart/index.html\r
- *\r
- * This library is free software; you can redistribute it and/or modify it\r
- * under the terms of the GNU Lesser General Public License as published by\r
- * the Free Software Foundation; either version 2.1 of the License, or\r
- * (at your option) any later version.\r
- *\r
- * This library is distributed in the hope that it will be useful, but\r
- * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY\r
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public\r
- * License for more details.\r
- *\r
- * You should have received a copy of the GNU Lesser General Public\r
- * License along with this library; if not, write to the Free Software\r
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,\r
- * USA.\r
- *\r
- * [Java is a trademark or registered trademark of Sun Microsystems, Inc.\r
- * in the United States and other countries.]\r
- *\r
- * ------------------\r
- * LineUtilities.java\r
- * ------------------\r
- * (C) Copyright 2008, by Object Refinery Limited and Contributors.\r
- *\r
- * Original Author: David Gilbert (for Object Refinery Limited);\r
- * Contributor(s): -;\r
- *\r
- * Changes\r
- * -------\r
- * 05-Nov-2008 : Version 1 (DG);\r
- *\r
- */\r
-\r
-import java.awt.geom.Line2D;\r
-import java.awt.geom.Rectangle2D;\r
-\r
-/**\r
- * Some utility methods for {@link Line2D} objects.\r
- *\r
- * @since 1.0.12\r
- */\r
-public class LineUtilities {\r
-\r
- /**\r
- * Clips the specified line to the given rectangle.\r
- *\r
- * @param line the line (<code>null</code> not permitted).\r
- * @param rect the clipping rectangle (<code>null</code> not permitted).\r
- *\r
- * @return <code>true</code> if the clipped line is visible, and\r
- * <code>false</code> otherwise.\r
- */\r
- public static boolean clipLine(Line2D line, Rectangle2D rect) {\r
-\r
- double x1 = line.getX1();\r
- double y1 = line.getY1();\r
- double x2 = line.getX2();\r
- double y2 = line.getY2();\r
-\r
- double minX = rect.getMinX();\r
- double maxX = rect.getMaxX();\r
- double minY = rect.getMinY();\r
- double maxY = rect.getMaxY();\r
-\r
- int f1 = rect.outcode(x1, y1);\r
- int f2 = rect.outcode(x2, y2);\r
-\r
- while ((f1 | f2) != 0) {\r
- if ((f1 & f2) != 0) {\r
- return false;\r
- }\r
- double dx = (x2 - x1);\r
- double dy = (y2 - y1);\r
- // update (x1, y1), (x2, y2) and f1 and f2 using intersections\r
- // then recheck\r
- if (f1 != 0) {\r
- // first point is outside, so we update it against one of the\r
- // four sides then continue\r
- if ((f1 & Rectangle2D.OUT_LEFT) == Rectangle2D.OUT_LEFT\r
- && dx != 0.0) {\r
- y1 = y1 + (minX - x1) * dy / dx;\r
- x1 = minX;\r
- }\r
- else if ((f1 & Rectangle2D.OUT_RIGHT) == Rectangle2D.OUT_RIGHT\r
- && dx != 0.0) {\r
- y1 = y1 + (maxX - x1) * dy / dx;\r
- x1 = maxX;\r
- }\r
- else if ((f1 & Rectangle2D.OUT_BOTTOM) == Rectangle2D.OUT_BOTTOM\r
- && dy != 0.0) {\r
- x1 = x1 + (maxY - y1) * dx / dy;\r
- y1 = maxY;\r
- }\r
- else if ((f1 & Rectangle2D.OUT_TOP) == Rectangle2D.OUT_TOP\r
- && dy != 0.0) {\r
- x1 = x1 + (minY - y1) * dx / dy;\r
- y1 = minY;\r
- }\r
- f1 = rect.outcode(x1, y1);\r
- }\r
- else if (f2 != 0) {\r
- // second point is outside, so we update it against one of the\r
- // four sides then continue\r
- if ((f2 & Rectangle2D.OUT_LEFT) == Rectangle2D.OUT_LEFT\r
- && dx != 0.0) {\r
- y2 = y2 + (minX - x2) * dy / dx;\r
- x2 = minX;\r
- }\r
- else if ((f2 & Rectangle2D.OUT_RIGHT) == Rectangle2D.OUT_RIGHT\r
- && dx != 0.0) {\r
- y2 = y2 + (maxX - x2) * dy / dx;\r
- x2 = maxX;\r
- }\r
- else if ((f2 & Rectangle2D.OUT_BOTTOM) == Rectangle2D.OUT_BOTTOM\r
- && dy != 0.0) {\r
- x2 = x2 + (maxY - y2) * dx / dy;\r
- y2 = maxY;\r
- }\r
- else if ((f2 & Rectangle2D.OUT_TOP) == Rectangle2D.OUT_TOP\r
- && dy != 0.0) {\r
- x2 = x2 + (minY - y2) * dx / dy;\r
- y2 = minY;\r
- }\r
- f2 = rect.outcode(x2, y2);\r
- }\r
- }\r
-\r
- line.setLine(x1, y1, x2, y2);\r
- return true; // the line is visible - if it wasn't, we'd have\r
- // returned false from within the while loop above\r
-\r
- }\r
-\r
+package org.simantics.diagram.profile;
+/*
+ * JFreeChart : a free chart library for the Java(tm) platform
+ *
+ *
+ * (C) Copyright 2000-2008, by Object Refinery Limited and Contributors.
+ *
+ * Project Info: http://www.jfree.org/jfreechart/index.html
+ *
+ * This library is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ * USA.
+ *
+ * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
+ * in the United States and other countries.]
+ *
+ * ------------------
+ * LineUtilities.java
+ * ------------------
+ * (C) Copyright 2008, by Object Refinery Limited and Contributors.
+ *
+ * Original Author: David Gilbert (for Object Refinery Limited);
+ * Contributor(s): -;
+ *
+ * Changes
+ * -------
+ * 05-Nov-2008 : Version 1 (DG);
+ *
+ */
+
+import java.awt.geom.Line2D;
+import java.awt.geom.Rectangle2D;
+
+/**
+ * Some utility methods for {@link Line2D} objects.
+ *
+ * @since 1.0.12
+ */
+public class LineUtilities {
+
+ /**
+ * Clips the specified line to the given rectangle.
+ *
+ * @param line the line (<code>null</code> not permitted).
+ * @param rect the clipping rectangle (<code>null</code> not permitted).
+ *
+ * @return <code>true</code> if the clipped line is visible, and
+ * <code>false</code> otherwise.
+ */
+ public static boolean clipLine(Line2D line, Rectangle2D rect) {
+
+ double x1 = line.getX1();
+ double y1 = line.getY1();
+ double x2 = line.getX2();
+ double y2 = line.getY2();
+
+ double minX = rect.getMinX();
+ double maxX = rect.getMaxX();
+ double minY = rect.getMinY();
+ double maxY = rect.getMaxY();
+
+ int f1 = rect.outcode(x1, y1);
+ int f2 = rect.outcode(x2, y2);
+
+ while ((f1 | f2) != 0) {
+ if ((f1 & f2) != 0) {
+ return false;
+ }
+ double dx = (x2 - x1);
+ double dy = (y2 - y1);
+ // update (x1, y1), (x2, y2) and f1 and f2 using intersections
+ // then recheck
+ if (f1 != 0) {
+ // first point is outside, so we update it against one of the
+ // four sides then continue
+ if ((f1 & Rectangle2D.OUT_LEFT) == Rectangle2D.OUT_LEFT
+ && dx != 0.0) {
+ y1 = y1 + (minX - x1) * dy / dx;
+ x1 = minX;
+ }
+ else if ((f1 & Rectangle2D.OUT_RIGHT) == Rectangle2D.OUT_RIGHT
+ && dx != 0.0) {
+ y1 = y1 + (maxX - x1) * dy / dx;
+ x1 = maxX;
+ }
+ else if ((f1 & Rectangle2D.OUT_BOTTOM) == Rectangle2D.OUT_BOTTOM
+ && dy != 0.0) {
+ x1 = x1 + (maxY - y1) * dx / dy;
+ y1 = maxY;
+ }
+ else if ((f1 & Rectangle2D.OUT_TOP) == Rectangle2D.OUT_TOP
+ && dy != 0.0) {
+ x1 = x1 + (minY - y1) * dx / dy;
+ y1 = minY;
+ }
+ f1 = rect.outcode(x1, y1);
+ }
+ else if (f2 != 0) {
+ // second point is outside, so we update it against one of the
+ // four sides then continue
+ if ((f2 & Rectangle2D.OUT_LEFT) == Rectangle2D.OUT_LEFT
+ && dx != 0.0) {
+ y2 = y2 + (minX - x2) * dy / dx;
+ x2 = minX;
+ }
+ else if ((f2 & Rectangle2D.OUT_RIGHT) == Rectangle2D.OUT_RIGHT
+ && dx != 0.0) {
+ y2 = y2 + (maxX - x2) * dy / dx;
+ x2 = maxX;
+ }
+ else if ((f2 & Rectangle2D.OUT_BOTTOM) == Rectangle2D.OUT_BOTTOM
+ && dy != 0.0) {
+ x2 = x2 + (maxY - y2) * dx / dy;
+ y2 = maxY;
+ }
+ else if ((f2 & Rectangle2D.OUT_TOP) == Rectangle2D.OUT_TOP
+ && dy != 0.0) {
+ x2 = x2 + (minY - y2) * dx / dy;
+ y2 = minY;
+ }
+ f2 = rect.outcode(x2, y2);
+ }
+ }
+
+ line.setLine(x1, y1, x2, y2);
+ return true; // the line is visible - if it wasn't, we'd have
+ // returned false from within the while loop above
+
+ }
+
}
\ No newline at end of file
Code Review / simantics / platform.git / blobdiff