Android Open Source - clash_of_balls Vector

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From Project

Back to project page clash_of_balls.

License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright (C) 2012-2013 Hans Hardmeier <hanshardmeier@gmail.com>
 * Copyright (C) 2012-2013 Andrin Jenal/*from   ww  w.jav  a2  s.  c  om*/
 * Copyright (C) 2012-2013 Beat Kng <beat-kueng@gmx.net>
 * 
 * This program 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; version 3 of the License.
 * 
 * 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 General Public License for more details.
 *
 */

package com.sapos_aplastados.game.clash_of_balls.game;

import org.jbox2d.common.Vec2;

import android.util.FloatMath;


public class Vector {
  
  // 2D vector
  public float x;
  public float y;

  public Vector() {
    x = 0.0f;
    y = 0.0f;
  }
  public Vector(Vec2 v) {
    x = v.x;
    y = v.y;
  }

  public Vector(float fx, float fy) {
    x = fx;
    y = fy;
  }

  public Vector(Vector src) {
    x = src.x;
    y = src.y;
  }

  public void set(Vector src) {
    x = src.x;
    y = src.y;
  }

  public void set(float fx, float fy) {
    x = fx;
    y = fy;
  }

  
  public float length() { 
    return FloatMath.sqrt((x * x) + (y * y));
  }
  
  public float lengthSquared() { 
    return (x * x) + (y * y);
  }

  public void normalize() {
    float len = length();

    if (len != 0.0f) {
      x /= len;
      y /= len;
    } else {
      x = 0.0f;
      y = 0.0f;
    }
  }
  
  public float distSquared(Vector p) {
    return (x-p.x) * (x-p.x) + (y-p.y) * (y-p.y);
  }
  public float dist(Vector p) {
    return FloatMath.sqrt((x-p.x) * (x-p.x) + (y-p.y) * (y-p.y));
  }

  public float angle() {
    return (float) Math.atan2(y, x);
  }
  
  public void add(Vector vector) {
    x += vector.x;
    y += vector.y;
  }
  public void add(float fx, float fy) {
    x+=fx;
    y+=fy;
  }

  public void sub(Vector vector) {
    x -= vector.x;
    y -= vector.y;
  }
  public void sub(float fx, float fy) {
    x-=fx;
    y-=fy;
  }


  public void mul(Vector vector) {
    x *= vector.x;
    y *= vector.y; 
  }
   
  public void mul(float scalar) {
    x *= scalar;
    y *= scalar;
  }

  public float dot(Vector vector) {
    return (x * vector.x) + (y * vector.y);
  }

  public void rotate(float dAlfa_rad) {
    float nCos = FloatMath.cos(dAlfa_rad);
    float nSin = FloatMath.sin(dAlfa_rad);
    
    float iX = x * nCos - y * nSin;
    float iY = y * nCos + x * nSin;

    x = iX;
    y = iY;
  }

}

Java Source Code List

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