[Bprocessor-commit] gl/src/net/sourceforge/bprocessor/gl/view Transformation.java,1.2,1.3

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

Update of /cvsroot/bprocessor/gl/src/net/sourceforge/bprocessor/gl/view
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv26344/src/net/sourceforge/bprocessor/gl/view

Modified Files:
	Transformation.java 
Log Message:
Un-Projecting is implemented

Index: Transformation.java
===================================================================
RCS file: /cvsroot/bprocessor/gl/src/net/sourceforge/bprocessor/gl/view/Transformation.java,v
retrieving revision 1.2
retrieving revision 1.3
diff -C2 -d -r1.2 -r1.3
*** Transformation.java	30 Aug 2005 08:22:35 -0000	1.2
--- Transformation.java	30 Aug 2005 09:37:25 -0000	1.3
***************
*** 117,120 ****
--- 117,184 ----
      return projection;
    }
+   
+   /**
+    * Un-projects the Surface to screen coordinates
+    * 
+    * @param surface The Surface to un-project
+    * @return The un-projected Surface
+    */
+   public Surface unProject(Surface surface) {
+     List edges = new ArrayList();
+     Iterator iter = surface.getEdges().iterator();
+     while (iter.hasNext()) {
+       Edge current = (Edge) iter.next();
+       edges.add(unProject(current));
+     }
+     Surface projected = new Surface("projection of " + surface.getName());
+     projected.setEdges(edges);
+     return projected;
+   }
+   
+   /**
+    * Un-projects the Edge to model coordinates
+    * @param edge The edge to un-project
+    * @return The un-projected edge
+    */
+   public Edge unProject(Edge edge) {
+     Vertex from = unProject(edge.getFrom());
+     Vertex to = unProject(edge.getTo());
+     Edge projected = new Edge("projection of " + edge.getName());
+     projected.setFrom(from);
+     projected.setTo(to);
+     return projected;
+   }
+   
+   /**
+    * Un-projects the Vertex to model coordinates
+    * @param vertex The Vertex to un-project
+    * @return The un-projected Vertex
+    */
+   public Vertex unProject(Vertex vertex) {
+     double x = vertex.getX();
+     double y = vertex.getY();
+     double z = vertex.getZ();
+     double[] view = new double[3];
+     boolean success = glu.gluUnProject(x, y, z, modelview, projection, viewport, view);
+     if (!success) {
+       System.out.println("error un-projecting");
+     }
+     Vertex projection = new Vertex("un-projection of " + vertex.getName());
+     System.out.println("x = " + view[0]);
+     projection.setX(round(view[0]));
+     projection.setY(round(view[1]));
+     projection.setZ(round(view[2]));
+     return projection;
+   }
+   
+   /**
+    * Round to 4 decimals
+    * @param value The value to round
+    * @return The rounded value
+    */
+   private double round(double value) {
+     long i = (long) Math.round(value * 1000);
+     return ((double) i) / 1000.0;
+   }
  
  }