Package org.web3d.vrml.export.compressors

Class FloatPacker

java.lang.Object

org.web3d.vrml.export.compressors.FloatPacker

public class FloatPacker
extends Object

Compresses float by using quanitization.

Version:

$Revision: 1.6 $

Author:

Alan Hudson

Constructor Summary

Constructors

Constructor	Description
FloatPacker(int num_exponent_bits, int num_mantissa_bits)
FloatPacker(int num_exponent_bits, int num_mantissa_bits, boolean signed)

Method Summary

Modifier and Type	Method	Description
float	decode(long src, boolean signed)	Decodes a bit representation to a float value.
long	encode(float f, boolean rounding)	Encode a float.
void	reinit(int num_exponent_bits, int num_mantissa_bits)
void	reinit(int num_exponent_bits, int num_mantissa_bits, boolean signed)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

FloatPacker

public FloatPacker(int num_exponent_bits,
 int num_mantissa_bits)

FloatPacker

public FloatPacker(int num_exponent_bits,
 int num_mantissa_bits,
 boolean signed)

Method Details

reinit

public void reinit(int num_exponent_bits,
 int num_mantissa_bits,
 boolean signed)

reinit

public void reinit(int num_exponent_bits,
 int num_mantissa_bits)

encode

public long encode(float f,
 boolean rounding)

Encode a float. The return value is the bit representation using the requested mantissa and exponent bits. Mask out the result and save the bits.

Parameters:

f - The float to encode

rounding - Whether to round the result. Gives better accuracy.

Returns:

decode

public float decode(long src,
 boolean signed)

Decodes a bit representation to a float value.

Parameters:

src - The source bits

signed -

Returns:

The float value