[Bprocessor-commit] model/src/net/sourceforge/bprocessor/model Plane.java,1.2,1.3

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

Update of /cvsroot/bprocessor/model/src/net/sourceforge/bprocessor/model
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv6819/src/net/sourceforge/bprocessor/model

Modified Files:
	Plane.java 
Log Message:
Clicking at the XY plane works

Index: Plane.java
===================================================================
RCS file: /cvsroot/bprocessor/model/src/net/sourceforge/bprocessor/model/Plane.java,v
retrieving revision 1.2
retrieving revision 1.3
diff -C2 -d -r1.2 -r1.3
*** Plane.java	26 Aug 2005 14:49:23 -0000	1.2
--- Plane.java	30 Aug 2005 13:11:32 -0000	1.3
***************
*** 51,55 ****
     * @return the intersection with the (x y t) ray or NaN
     */
!   double intersection(double x, double y) {
      if (c != 0) {
        return -(a * x + b * y + d) / c;
--- 51,55 ----
     * @return the intersection with the (x y t) ray or NaN
     */
!   public double intersection(double x, double y) {
      if (c != 0) {
        return -(a * x + b * y + d) / c;
***************
*** 58,61 ****
--- 58,89 ----
      }
    }
+   
+   /**
+    * Find the intersection with the ray originating at origin
+    * with the specified direction
+    * @param origin The origin of the ray
+    * @param direction The direction of the ray
+    * @return The intersection point
+    */
+   public Vertex intersection(Vertex origin, Vertex direction) {
+     double x0 = origin.getX();
+     double y0 = origin.getY();
+     double z0 = origin.getZ();
+     double xd = direction.getX();
+     double yd = direction.getY();
+     double zd = direction.getZ();
+     double vd = a * xd + b * yd + c * zd;
+     if (vd != 0) {
+       double v0 = -(a * x0 + b * y0 + c * z0 + d);
+       double t = v0 / vd;
+       Vertex i = new Vertex("intersection");
+       i.setX(x0 + t * xd);
+       i.setY(y0 + t * yd);
+       i.setZ(z0 + t * zd);
+       return i;
+     } else {
+       return null;
+     }
+   }
  
  }