[Bprocessor-commit] model/src/net/sourceforge/bprocessor/model Edge.java,1.42,1.43

[Michael L. <he...@us...>]

Update of /cvsroot/bprocessor/model/src/net/sourceforge/bprocessor/model
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv26586/src/net/sourceforge/bprocessor/model

Modified Files:
	Edge.java 
Log Message:
Improvemenents of construction line functionality in pencil

Index: Edge.java
===================================================================
RCS file: /cvsroot/bprocessor/model/src/net/sourceforge/bprocessor/model/Edge.java,v
retrieving revision 1.42
retrieving revision 1.43
diff -C2 -d -r1.42 -r1.43
*** Edge.java	25 Mar 2006 18:08:32 -0000	1.42
--- Edge.java	29 Mar 2006 13:18:35 -0000	1.43
***************
*** 271,274 ****
--- 271,309 ----
    
    /**
+    * Finds the intersection between a Vertex and this
+    * edge. The intersection is defined as the vertex
+    * on this edge with the smalled perpendicular distance
+    * to the vertex
+    * @param vertex The vertex
+    * @return The intersection
+    */
+   public Vertex intersection(Vertex vertex) {
+     //FIXME the following seems too longwinded
+     // There has got to be a better way!
+     if (intersects(vertex)) {
+       return vertex;
+     } else {
+       Edge edge = new Edge(getFrom(), vertex);
+       CoordinateSystem system = CoordinateSystem.create(this, edge);
+       if (system != null) {
+         Vertex a = system.translate(getFrom());
+         Vertex b = system.translate(getTo());
+         Vertex p = system.translate(vertex);
+         
+         Vertex u = b.minus(a);
+         u.scale(1 / u.length());
+         Vertex ap = p.minus(a);
+         double t = u.dot(ap);
+         u.scale(t);
+         Vertex q = a.add(u);
+         q = system.unTranslate(q);
+         return q;
+       } else {
+         return vertex;
+       }
+     }
+   }
+   
+   /**
     * Split this edge and update all surfaces
     * accordingly.