gov/nasa/worldwind/SectorGeometryList.java

   1 /*
   2 Copyright (C) 2001, 2006 United States Government
   3 as represented by the Administrator of the
   4 National Aeronautics and Space Administration.
   5 All Rights Reserved.
   6 */
   7 package gov.nasa.worldwind;
   8
   9 import gov.nasa.worldwind.geom.*;
  10
  11 import javax.media.opengl.*;
  12 import java.awt.*;
  13 import java.util.*;
  14 import java.util.List;
  15
  16 /**
  17  * @author tag
  18  * @version $Id: SectorGeometryList.java 1994 2007-06-11 16:33:33Z dcollins $
  19  */
  20 public class SectorGeometryList extends ArrayList<SectorGeometry>
  21 {
  22     private PickSupport pickSupport = new PickSupport();
  23
  24     public SectorGeometryList()
  25     {
  26     }
  27
  28     public SectorGeometryList(SectorGeometryList list)
  29     {
  30         super(list);
  31     }
  32
  33     public List<SectorGeometry> getIntersectingSectors(Sector sector)
  34     {
  35         ArrayList<SectorGeometry> list = null;
  36
  37         for (SectorGeometry sg : this)
  38         {
  39             if (sg.getSector().intersects(sector))
  40             {
  41                 if (list == null)
  42                     list = new ArrayList<SectorGeometry>();
  43                 list.add(sg);
  44             }
  45             else
  46             {
  47 //                System.out.println("no intersection");
  48             }
  49         }
  50
  51         return list;
  52     }
  53
  54     public void pick(DrawContext dc, java.awt.Point pickPoint)
  55     {
  56         this.pickSupport.clearPickList();
  57         this.pickSupport.beginPicking(dc);
  58
  59         GL gl = dc.getGL();
  60         gl.glPushAttrib(GL.GL_LIGHTING_BIT | GL.GL_DEPTH_BUFFER_BIT | GL.GL_ENABLE_BIT | GL.GL_CURRENT_BIT);
  61         gl.glEnable(GL.GL_DEPTH_TEST);
  62         gl.glShadeModel(GL.GL_FLAT);
  63         gl.glDisable(GL.GL_CULL_FACE);
  64
  65         try
  66         {
  67             // render each sector in unique color
  68             for (SectorGeometry sector : this)
  69             {
  70                 Color color = dc.getUniquePickColor();
  71                 dc.getGL().glColor3ub((byte) color.getRed(), (byte) color.getGreen(), (byte) color.getBlue());
  72                 sector.render(dc);
  73                 // lat/lon/elevation not used in this case
  74                 this.pickSupport.addPickableObject(color.getRGB(), sector, Position.ZERO, true);
  75             }
  76
  77             PickedObject pickedSector = this.pickSupport.getTopObject(dc, pickPoint, null);
  78             if (pickedSector == null || pickedSector.getObject() == null)
  79                 return; // no sector picked
  80
  81             SectorGeometry sector = (SectorGeometry) pickedSector.getObject();
  82             gl.glDepthFunc(GL.GL_LEQUAL);
  83             sector.pick(dc, pickPoint);
  84         }
  85         finally
  86         {
  87             gl.glPopAttrib();
  88             this.pickSupport.endPicking(dc);
  89             this.pickSupport.clearPickList();
  90         }
  91     }
  92
  93     public Vec4 getSurfacePoint(Position position)
  94     {
  95         return this.getSurfacePoint(position.getLatitude(), position.getLongitude(), position.getElevation());
  96     }
  97
  98     public Vec4 getSurfacePoint(Angle latitude, Angle longitude)
  99     {
 100         return this.getSurfacePoint(latitude, longitude, 0d);
 101     }
 102
 103     public Vec4 getSurfacePoint(Angle latitude, Angle longitude, double metersOffset)
 104     {
 105         if (latitude == null || longitude == null)
 106         {
 107             String msg = WorldWind.retrieveErrMsg("nullValue.LatLonIsNull");
 108             WorldWind.logger().log(java.util.logging.Level.FINE, msg);
 109             throw new IllegalArgumentException(msg);
 110         }
 111
 112         for (SectorGeometry sg : this)
 113         {
 114             if (sg.getSector().contains(latitude, longitude))
 115             {
 116                 Vec4 point = sg.getSurfacePoint(latitude, longitude, metersOffset);
 117                 if (point != null)
 118                     return point;
 119             }
 120         }
 121
 122         return null;
 123     }
 124 }