X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.g2d%2Fsrc%2Forg%2Fsimantics%2Fg2d%2Frouting%2FConnectionDirectionUtil.java;fp=bundles%2Forg.simantics.g2d%2Fsrc%2Forg%2Fsimantics%2Fg2d%2Frouting%2FConnectionDirectionUtil.java;h=5c86382a897bda76561a4507bbd2a64e491efa81;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

diff --git a/bundles/org.simantics.g2d/src/org/simantics/g2d/routing/ConnectionDirectionUtil.java b/bundles/org.simantics.g2d/src/org/simantics/g2d/routing/ConnectionDirectionUtil.java
new file mode 100644
index 000000000..5c86382a8
--- /dev/null
+++ b/bundles/org.simantics.g2d/src/org/simantics/g2d/routing/ConnectionDirectionUtil.java
@@ -0,0 +1,91 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.g2d.routing;
+
+import java.awt.geom.Rectangle2D;
+import java.util.Arrays;
+
+import org.simantics.g2d.routing.IConnection.Connector;
+
+public class ConnectionDirectionUtil {
+	
+	public static class Dir implements Comparable<Dir> {
+		int id;
+		double dist;
+		
+		public Dir(int id, double dist) {
+			this.id = id;
+			this.dist = dist;
+		}
+
+		@Override
+		public int compareTo(Dir o) {
+			if(dist < o.dist)
+				return -1;
+			if(o.dist < dist)
+				return 1;
+			return 0;
+		}	
+		
+	}
+	
+	public static Terminal createTerminal(Rectangle2D shape, double x, double y) {
+		Dir[] dirs = new Dir[] {
+			new Dir(0, shape.getMaxX() - x),
+			new Dir(1, shape.getMaxY() - y),
+			new Dir(2, x - shape.getMinX()),
+			new Dir(3, y - shape.getMinY()),
+		};
+		Arrays.sort(dirs);
+		double[] dist = new double[4];
+		int flags = 0;
+		int i=0;
+		do {
+			flags |= 1 << dirs[i].id;
+			dist[dirs[i].id] = Math.max(0.0, dirs[i].dist+1e-6);
+			++i;
+		} while(i < 4 && (dirs[i].dist <= 0.0 || dirs[i].dist*0.9 < dirs[0].dist));
+		return new Terminal(x, y, flags, dist, shape);
+	}
+	
+	public static int reverseDirections(int flags) {
+		return ((flags & Constants.EAST_FLAG) == 0 ? 0 : Constants.WEST_FLAG)
+			 | ((flags & Constants.SOUTH_FLAG) == 0 ? 0 : Constants.NORTH_FLAG)
+			 | ((flags & Constants.WEST_FLAG) == 0 ? 0 : Constants.EAST_FLAG)
+			 | ((flags & Constants.NORTH_FLAG) == 0 ? 0 : Constants.SOUTH_FLAG);
+	}
+	
+	public static void determineAllowedDirections(Connector c) {
+	    if(c.parentObstacle == null) {
+	        c.allowedDirections = 0xf;
+	        return;
+	    }
+	    Dir[] dirs = new Dir[] {
+            new Dir(0, c.parentObstacle.getMaxX() - c.x),
+            new Dir(1, c.parentObstacle.getMaxY() - c.y),
+            new Dir(2, c.x - c.parentObstacle.getMinX()),
+            new Dir(3, c.y - c.parentObstacle.getMinY()),
+        };
+        Arrays.sort(dirs);
+        double[] dist = new double[4];
+        c.allowedDirections = 0;
+        int i=0;
+        do {
+            c.allowedDirections |= 1 << dirs[i].id;
+            dist[dirs[i].id] = Math.max(0.0, dirs[i].dist+1e-6);
+            ++i;
+        } while(i < 4 &&
+        		((dirs[i].id == ((dirs[0].id + 2)&3) && (dirs[i].dist <= 0.0 || dirs[i].dist*0.9 < dirs[0].dist)) ||
+        		(dirs[i].dist <= 0.0 || dirs[i].dist*0.95 < dirs[0].dist))
+        		);
+	}
+}