Android Open Source - min3d Number3d Buffer List

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License

The source code is released under:
MIT License
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Java Source Code

package com.min3d.lib.core;
//from  w ww.java  2  s .c  o  m
import com.min3d.lib.vos.Number3d;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;

public class Number3dBufferList
{
  public static final int PROPERTIES_PER_ELEMENT = 3;
  public static final int BYTES_PER_PROPERTY = 4;

  private FloatBuffer _b;
  private int _numElements = 0;
  
  public Number3dBufferList(FloatBuffer $b, int $size)
  {
    ByteBuffer bb = ByteBuffer.allocateDirect($b.limit() * BYTES_PER_PROPERTY); 
    bb.order(ByteOrder.nativeOrder());
    _b = bb.asFloatBuffer();
    _b.put($b);
    _numElements = $size;
  }
  
  public Number3dBufferList(int $maxElements)
  {
    int numBytes = $maxElements * PROPERTIES_PER_ELEMENT * BYTES_PER_PROPERTY;
    ByteBuffer bb = ByteBuffer.allocateDirect(numBytes); 
    bb.order(ByteOrder.nativeOrder());
    
    _b  = bb.asFloatBuffer();
  }
  
  /**
   * The number of items in the list. 
   */
  public int size()
  {
    return _numElements;
  }
  
  /**
   * The _maximum_ number of items that the list can hold, as defined on instantiation.
   * (Not to be confused with the Buffer's capacity)
   */
  public int capacity()
  {
    return _b.capacity() / PROPERTIES_PER_ELEMENT;
  }
  
  /**
   * Clear object in preparation for garbage collection
   */
  public void clear()
  {
    _b.clear();
  }
  
  //
  
  public Number3d getAsNumber3d(int $index)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT);
    return new Number3d( _b.get(), _b.get(), _b.get() );
  }
  
  public void putInNumber3d(int $index, Number3d $number3d)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT);
    $number3d.x = _b.get();
    $number3d.y = _b.get();
    $number3d.z = _b.get();
  }
  
  public float getPropertyX(int $index)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT);
    return _b.get();
  }
  public float getPropertyY(int $index)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT + 1);
    return _b.get();
  }
  public float getPropertyZ(int $index)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT + 2);
    return _b.get();
  }
  
  //
  
  public void add(Number3d $n)
  {
    set( _numElements, $n );
    _numElements++;
  }
  
  public void add(float $x, float $y, float $z)
  {
    set( _numElements, $x,$y,$z );
    _numElements++;
  }
  
  public void set(int $index, Number3d $n)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT);
    _b.put($n.x);
    _b.put($n.y);
    _b.put($n.z);
  }

  public void set(int $index, float $x, float $y, float $z)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT);
    _b.put($x);
    _b.put($y);
    _b.put($z);
  }
  
  public void setPropertyX(int $index, float $x)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT);
    _b.put($x);
  }
  public void setPropertyY(int $index, float $y)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT + 1);
    _b.put($y);
  }
  public void setPropertyZ(int $index, float $z)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT + 2);
    _b.put($z);
  }
  
  //
  
  public FloatBuffer buffer()
  {
    return _b;
  }
  
  public void overwrite(float[] $newVals)
  {
    _b.position(0);
    _b.put($newVals);
  }
  
  public Number3dBufferList clone()
  {
    _b.position(0);
    Number3dBufferList c = new Number3dBufferList(_b, size());
    return c;
  }
}
Java Source Code List
