Android Open Source - polygons F Contact I D

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License

The source code is released under:

MIT License

Java Source Code

/*
  Part of the Fisica library - http://www.ricardmarxer.com/fisica
/*from ww  w . j a va 2  s.c o  m*/
  Copyright (c) 2009 - 2010 Ricard Marxer

  Fisica is free software: you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU Lesser General Public License for more details.
  
  You should have received a copy of the GNU Lesser General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

package fisica;

import org.jbox2d.common.*;
import org.jbox2d.collision.*;
import org.jbox2d.dynamics.*;
import org.jbox2d.dynamics.contacts.*;

class FContactID {
  protected ContactID m_id;
  protected FBody m_b1;
  protected FBody m_b2;
  
  private static final int HASH_PRIME = 1000003;

  public FContactID(ContactID id, FBody b1, FBody b2) {
    m_id = id;
    m_b1 = b1;
    m_b2 = b2;
  }

  public FContactID(FContactID fid) {
    m_id = new ContactID(fid.m_id);
    m_b1 = fid.m_b1;
    m_b2 = fid.m_b2;
  }

  public int hashCode()
  {
    int result = 0;
    
    int h1 = m_b1.hashCode();
    int h2 = m_b2.hashCode();

    if (h1 < h2) {
      result = HASH_PRIME * result + h1;
      result = HASH_PRIME * result + h2;
    } else {
      result = HASH_PRIME * result + h2;
      result = HASH_PRIME * result + h1;
    }

    result = HASH_PRIME * result + m_id.features.flip;
    result = HASH_PRIME * result + m_id.features.incidentVertex;
    result = HASH_PRIME * result + m_id.features.referenceEdge;
    result = HASH_PRIME * result + m_id.features.incidentEdge;

    return result;

    /*
    return m_id.features.flip
      + m_id.features.incidentVertex*2
      + m_id.features.referenceEdge*2*255
      + m_id.features.incidentEdge*2*255*255;
    */
  }

  public String toString() {
    return m_id.features.toString();
  }

  public boolean equals(Object obj)
  {
    if(this == obj)
      return true;

    if((obj == null) || (obj.getClass() != this.getClass()))
      return false;

    // object must be Test at this point
    FContactID test = (FContactID)obj;
    return m_id.isEqual(test.m_id);
  }

}

Java Source Code List

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