bprocessor-commit

[Nordholt <nor...@us...>]

Update of /cvsroot/bprocessor/gl/src/net/sourceforge/bprocessor/gl/view
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv19284

Modified Files:
	View3D.java 
Log Message:
Implemented the getObjectAtPoint method to support selection in 3D

Index: View3D.java
===================================================================
RCS file: /cvsroot/bprocessor/gl/src/net/sourceforge/bprocessor/gl/view/View3D.java,v
retrieving revision 1.2
retrieving revision 1.3
diff -C2 -d -r1.2 -r1.3
*** View3D.java	5 Aug 2005 11:02:31 -0000	1.2
--- View3D.java	15 Aug 2005 13:00:46 -0000	1.3
***************
*** 11,15 ****
  import net.java.games.jogl.GL;
  import net.java.games.jogl.GLDrawable;
! import net.java.games.jogl.GLU;
  
  import org.apache.log4j.Logger;
--- 11,26 ----
  import net.java.games.jogl.GL;
  import net.java.games.jogl.GLDrawable;
! //import net.java.games.jogl.GLU;
! import net.java.games.jogl.util.BufferUtils;
! 
! 
! import net.sourceforge.bprocessor.model.Edge;
! import net.sourceforge.bprocessor.model.EdgeFacade;
! import net.sourceforge.bprocessor.model.Vertex;
! 
! import java.util.Iterator;
! import java.util.Set;
! 
! import java.nio.IntBuffer;
  
  import org.apache.log4j.Logger;
***************
*** 30,33 ****
--- 41,53 ----
    /** The rotation about the Y axis */
    private static double rotationY = -30;
+   
+   /** The picking state */
+   private int picking = 0;
+   
+   /** x coordinate */
+   private double x;
+   
+   /** y coordinate */
+   private double y;
  
    /** 
***************
*** 48,57 ****
      }
      gl = gld.getGL();
!     GLU glu = gld.getGLU();
! 
!     gl.glShadeModel(GL.GL_FLAT);
  
      gl.glMatrixMode(GL.GL_PROJECTION);
      gl.glLoadIdentity();
      double aspect = width / height;
      if (aspect < 1.0) {
--- 68,82 ----
      }
      gl = gld.getGL();
!     glu = gld.getGLU();
!     int[] viewport = new int[] {0, 0, (int)width, (int)height};
!         
!     gl.glShadeModel(GL.GL_SMOOTH); //hacking linux
  
      gl.glMatrixMode(GL.GL_PROJECTION);
      gl.glLoadIdentity();
+     //Set the PickMatrix if we are trying to pick something
+     if (picking > 0) {
+       glu.gluPickMatrix(x, viewport[3] - y, 2, 2, viewport);
+     }
      double aspect = width / height;
      if (aspect < 1.0) {
***************
*** 157,159 ****
--- 182,275 ----
      }
    }
+ 
+   /**
+    *Names objects in the scene for selection
+    */
+   protected void nameObjects() {
+     gl.glClear(GL.GL_COLOR_BUFFER_BIT);
+     gl.glMatrixMode(GL.GL_MODELVIEW);
+     gl.glPushMatrix();
+         
+     gl.glInitNames();
+     
+     Set edges = EdgeFacade.getInstance().findAll();
+     Iterator it = edges.iterator();
+     gl.glColor3dv(STD_LINE_COLOR);
+     gl.glLineWidth(1.0f);
+     gl.glColor3dv(STD_LINE_COLOR);
+     while (it.hasNext()) {
+       Edge e = (Edge)it.next();
+       Vertex to = e.getTo();
+       Vertex from = e.getFrom();
+       int name = e.getId().intValue();
+       if (to != null && from != null) {
+         gl.glPushName(name);
+         gl.glBegin(GL.GL_LINES);
+         gl.glVertex3d(to.getX(), to.getY(), to.getZ());
+         gl.glVertex3d(from.getX(), from.getY(), from.getZ());
+         gl.glEnd();
+         gl.glPopName();
+       }
+     }
+     gl.glPopMatrix();
+   }
+ 
+   /**
+    * Gives an id of the object under the point of a mouseclick
+    * @param x the x coordinate of the point
+    * @param y the y coordinate of the point
+    * @return a Long id of the object under the point, null if no object is there
+    */
+   public Long getObjectAtPoint(double x, double y) {
+     this.x = x;
+     this.y = y;
+     int hits;
+     IntBuffer selectBuffer = BufferUtils.newIntBuffer(1024);
+     Long id = null;
+     int[] mode = new int[1];
+     int[] viewport = new int[] {0, 0, (int)width, (int)height};
+            
+     gl.glSelectBuffer(1024, selectBuffer);
+     gl.glRenderMode(GL.GL_SELECT);
+ 
+     //drawing scene in selection mode
+     picking = 1; //indicating that I am trying to pick(used in camera)
+     gl.glMatrixMode(GL.GL_MODELVIEW);
+     gl.glPushMatrix();
+     gl.glLoadIdentity();
+     gl.glClear(GL.GL_COLOR_BUFFER_BIT);
+     gl.glViewport(0, 0, (int)width, (int)height);
+     camera(drawable);
+     grid();
+     coords();
+     gl.glColor3dv(STD_LINE_COLOR);
+     gl.glLineWidth(1.0f);
+     drawAll(drawable);    
+     gl.glPopMatrix();
+     picking = 0;
+     //end drawing scene
+     
+     //gl.glMatrixMode(GL.GL_PROJECTION);
+     //gl.glPopMatrix();
+     gl.glFlush();
+     
+     //Geting hits and going back to RENDER mode
+     hits = gl.glRenderMode(GL.GL_RENDER);
+     
+     //log.info("x,y = " + x + "," + y +  " hits = " + hits + ";SB = " + selectBuffer.get(0));
+     
+     //Processing hits
+     if (hits >= 1) {
+       Integer intId = new Integer(selectBuffer.get(3));
+       id = new Long(intId.longValue());
+     }
+     
+     gl.glMatrixMode(GL.GL_MODELVIEW);       
+     
+     if (id != null) {
+       return id;
+     } else {
+       return null;
+     }
+   }
  }