Packagecom.lookbackon.ds
Classpublic class BitVectors
InheritanceBitVectors Inheritance Object

the implementation would look something like this: //offline var n:uint = objects.length; var bv:BitVector = new BitVector( null, n ( n - 1 ) / 2 ); //test function handleCollision( minObj:CollidableObject, maxObj:CollidableObject ) : void { var bit:uint = minObj.index ( 2 n - minObj.index - 3 ) / 2 + maxObj.index - 1; if( !bv.getBit( bit ) ){ //test for collision bv.setBit( bit, true ); } }

See also

http://blog.generalrelativity.org/actionscript-30/avm2-memory-considerations-and-bit-vectors/

Public Properties
 PropertyDefined By
  bits : uint
[read-only]
BitVectors
  bytes : uint
[read-only]
BitVectors
  length : uint
[read-only]
BitVectors
Public Methods
 MethodDefined By
  
BitVectors(source:Vector.<uint> = null, numBits:uint = 128)
BitVectors
  
AND(bitVector:BitVectors):BitVectors
BitVectors
  
flagAllOff():void
BitVectors
  
flagAllOn():void
BitVectors
  
getBit(bit:uint):uint
BitVectors
  
OR(bitVector:BitVectors):BitVectors
BitVectors
  
setBit(bit:uint, flag:Boolean = true):void
BitVectors
  
toString():String
BitVectors
Property Detail
bitsproperty
bits:uint  [read-only]


Implementation
    public function get bits():uint
bytesproperty 
bytes:uint  [read-only]


Implementation
    public function get bytes():uint
lengthproperty 
length:uint  [read-only]


Implementation
    public function get length():uint
Constructor Detail
BitVectors()Constructor
public function BitVectors(source:Vector.<uint> = null, numBits:uint = 128)



Parameters
source:Vector.<uint> (default = null)
 
numBits:uint (default = 128)
Method Detail
AND()method
public function AND(bitVector:BitVectors):BitVectors

Parameters

bitVector:BitVectors

Returns
BitVectors
flagAllOff()method 
public function flagAllOff():void

flagAllOn()method 
public function flagAllOn():void

getBit()method 
public function getBit(bit:uint):uint

Parameters

bit:uint

Returns
uint
OR()method 
public function OR(bitVector:BitVectors):BitVectors

Parameters

bitVector:BitVectors

Returns
BitVectors
setBit()method 
public function setBit(bit:uint, flag:Boolean = true):void

Parameters

bit:uint
 
flag:Boolean (default = true)

toString()method 
public function toString():String

Returns
String



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Thu Jan 16 2014, 01:11 PM +08:00