Android Open Source - min3d Number3d

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License

The source code is released under:

MIT License

Java Source Code

package com.min3d.lib.vos;
/*w w w .ja  v a 2  s  . c o  m*/
/**
 * Simple VO holding x,y, and z values. Plus helper math functions.
 * Care should be taken to avoid creating Number3d instances unnecessarily. 
 * Its use is not required for the construction of vertices.
 */
public class Number3d 
{
  public float x;
  public float y;
  public float z;
  
  private static Number3d _temp = new Number3d();
  
  
  public Number3d()
  {
    x = 0;
    y = 0;
    z = 0;
  }
  
  public Number3d(float $x, float $y, float $z)
  {
    x = $x;
    y = $y;
    z = $z;
  }
  
  //
  
  public void setAll(float $x, float $y, float $z)
  {
    x = $x;
    y = $y;
    z = $z;
  }
  
  public void setAllFrom(Number3d $n)
  {
    x = $n.x;
    y = $n.y;
    z = $n.z;
  }
  
  public void normalize()
  {
    float mod = (float) Math.sqrt( this.x*this.x + this.y*this.y + this.z*this.z );

    if( mod != 0 && mod != 1)
    {
      mod = 1 / mod; 
      this.x *= mod;
      this.y *= mod;
      this.z *= mod;
    }
  }

  public void add(Number3d n)
  {
    this.x += n.x;
    this.y += n.y;
    this.z += n.z;
  }
  
  public void subtract(Number3d n)
  {
    this.x -= n.x;
    this.y -= n.y;
    this.z -= n.z;
  }
  
  public void multiply(Float f)
  {
    this.x *= f;
    this.y *= f;
    this.z *= f;
  }
  
  public float length()
  {
    return (float) Math.sqrt( this.x*this.x + this.y*this.y + this.z*this.z );
  }
  
  public Number3d clone()
  {
    return new Number3d(x,y,z);
  }
  
  public void rotateX(float angle)
  {
    float cosRY = (float) Math.cos(angle);
    float sinRY = (float) Math.sin(angle);

    _temp.setAll(this.x, this.y, this.z); 

    this.y = (_temp.y*cosRY)-(_temp.z*sinRY);
    this.z = (_temp.y*sinRY)+(_temp.z*cosRY);
  }
  
  public void rotateY(float angle)
  {
    float cosRY = (float) Math.cos(angle);
    float sinRY = (float) Math.sin(angle);

    _temp.setAll(this.x, this.y, this.z); 
    
    this.x = (_temp.x*cosRY)+(_temp.z*sinRY);
    this.z = (_temp.x*-sinRY)+(_temp.z*cosRY);
  }
  
  public void rotateZ(float angle)
  {
    float cosRY = (float) Math.cos(angle);
    float sinRY = (float) Math.sin(angle);

    _temp.setAll(this.x, this.y, this.z);     

    this.x = (_temp.x*cosRY)-(_temp.y*sinRY);
    this.y = (_temp.x*sinRY)+(_temp.y*cosRY);
  }
  
  
  @Override
  public String toString()
  {
    return x + "," + y + "," + z; 
  }
  
  //

  public static Number3d add(Number3d a, Number3d b)
  {
    return new Number3d(a.x + b.x, a.y + b.y, a.z + b.z);
  }

  public static Number3d subtract(Number3d a, Number3d b)
  {
    return new Number3d(a.x - b.x, a.y - b.y, a.z - b.z);
  }
  
  public static Number3d multiply(Number3d a, Number3d b)
  {
    return new Number3d(a.x * b.x, a.y * b.y, a.z * b.z);
  }
  
  public static Number3d cross(Number3d v, Number3d w)
  {
    return new Number3d((w.y * v.z) - (w.z * v.y), (w.z * v.x) - (w.x * v.z), (w.x * v.y) - (w.y * v.x));
  }
  
  public static float dot(Number3d v, Number3d w)
  {
    return ( v.x * w.x + v.y * w.y + w.z * v.z );
  }
  
  // *   Math functions thanks to Papervision3D AS3 library
  //     http://code.google.com/p/papervision3d/
}

Java Source Code List

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