Android Open Source - Avoidance Velocity

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License

The source code is released under:

GNU General Public License

Java Source Code

/* 
 * Copyright (c) 2012 Florian Minges/*w w  w  .j a  va  2 s. co  m*/
 * 
 * This file is part of Avoidance.
 * 
 * Avoidance is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Avoidance 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Avoidance.  If not, see <http://www.gnu.org/licenses/>. 
 *  
 */

package se.chalmers.avoidance.core.components;

import se.chalmers.avoidance.util.Utils;

import com.artemis.Component;

/**
 * Component containing information about speed and its angle.
 * 
 * @author Florian Minges
 */
public class Velocity extends Component {

  /** The speed. */
  private float speed;

  /** The angle of the speed. */
  private float angle;

  /**
   * Constructs a <code>Velocity</code> component with zero speed and an angle
   * of 0 radians.
   */
  public Velocity() {
    this(0f, 0f);
  }

  /**
   * Constructs a <code>Velocity</code> component with a speed given by the
   * argument with the same name and an angle of 0 radians.
   * 
   * @param speed
   *            the speed
   */
  public Velocity(float speed) {
    this(speed, 0f);
  }

  /**
   * Constructs a <code>Velocity</code> component with the speed and angle,
   * given by the arguments with the same name.
   * 
   * @param speed
   *            the speed
   * @param angle
   *            the angle
   */
  public Velocity(float speed, float angle) {
    super();
    setAngle(angle);
    setSpeed(speed);
  }

  /**
   * Returns the components speed.
   * 
   * @return the speed.
   */
  public float getSpeed() {
    return speed;
  }

  /**
   * Returns the components angle.
   * 
   * @return the angle.
   */
  public float getAngle() {
    return angle;
  }

  /**
   * Sets the speed of this component.
   * 
   * @param speed
   *            the speed
   */
  public final void setSpeed(float speed) {
    this.speed = speed;
    if (this.speed < 0) {
      this.speed = Math.abs(this.speed);
      setAngle(Utils.reverseAngle(this.angle));
    }
  }

  /**
   * Sets the angle of this component.
   * 
   * @param angle
   *            the angle
   */
  public final void setAngle(float angle) {
    this.angle = Utils.simplifyAngle(angle);
  }

  /**
   * Adds the <code>speed</code> given in the argument of the same name, to
   * the speed of this component.
   * 
   * @param speed
   *            the speed to add
   */
  public void addSpeed(float speed) {
    setSpeed(this.speed + speed);
  }

  /**
   * Adds the <code>angle</code> given in the argument of the same name, to
   * the angle of this component.
   * 
   * @param angle
   *            the angle to add
   */
  public void addAngle(float angle) {
    setAngle(this.angle + angle);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public int hashCode() {
    // Eclipse auto-generated
    final int prime = 31;
    int result = 1;
    result = prime * result + Float.floatToIntBits(angle);
    result = prime * result + Float.floatToIntBits(speed);
    return result;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public boolean equals(Object obj) {
    // Eclipse auto-generated
    if (this == obj) {
      return true;
    }
    if (obj == null) {
      return false;
    }
    if (getClass() != obj.getClass()) {
      return false;
    }
    Velocity other = (Velocity) obj;
    if (Float.floatToIntBits(angle) != Float.floatToIntBits(other.angle)) {
      return false;
    }
    if (Float.floatToIntBits(speed) != Float.floatToIntBits(other.speed)) {
      return false;
    }
    return true;
  }

}

Java Source Code List

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