com.sun.j3d.utils.compression

Class CompressionStreamNormal

java.lang.Object

com.sun.j3d.utils.compression.CompressionStreamElement

com.sun.j3d.utils.compression.CompressionStreamNormal

 class CompressionStreamNormal
extends CompressionStreamElement

This class represents a normal in a compression stream. It maintains both floating-point and quantized representations. This normal may be bundled with a vertex or exist separately as a global normal.

Field Summary

Fields

Modifier and Type	Field and Description
private static double[][][][]	cgNormals
private static short[][]	inverseSine
private static short	MAX_SIN_14BIT
private static int	MAX_UV_BITS
private static int	MAX_UV_ENTRIES
private static double	MAX_Y_ANG
private float	normalX
private float	normalY
private float	normalZ
(package private) int	octant
(package private) int	sextant
(package private) boolean	specialNormal
private int	specialOctant
private int	specialSextant
private int	u
(package private) int	uAbsolute
private static double	UNITY_14
private int	v
(package private) int	vAbsolute

Fields inherited from class com.sun.j3d.utils.compression.CompressionStreamElement

absolute, length, lengthMask, quantizationMask, shift

Constructor Summary

Constructors

Constructor and Description
CompressionStreamNormal(CompressionStream stream, Vector3f normal) Create a CompressionStreamNormal.

Method Summary

Methods

Modifier and Type	Method and Description
private static void	computeInverseSineTables()
private static void	computeNormals()
(package private) void	outputCommand(HuffmanTable table, CommandStream output) Output a setNormal command.
private void	outputNormal(HuffmanTable table, CommandStream output, int header, int headerLength)
(package private) void	outputSubcommand(HuffmanTable table, CommandStream output) Output a normal subcommand.
(package private) void	quantize(CompressionStream stream, HuffmanTable huffmanTable) Quantize the floating point normal to a 6-bit octant/sextant plus u,v components of [0..6] bits.
java.lang.String	toString()

Methods inherited from class com.sun.j3d.utils.compression.CompressionStreamElement

computeLengthShift, computeLengthShift, computeLengthShift

Methods inherited from class java.lang.Object

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

Field Detail

u

private int u

v

private int v

specialOctant

private int specialOctant

specialSextant

private int specialSextant

normalX

private float normalX

normalY

private float normalY

normalZ

private float normalZ

octant

int octant

sextant

int sextant

specialNormal

boolean specialNormal

uAbsolute

int uAbsolute

vAbsolute

int vAbsolute

MAX_UV_BITS

private static final int MAX_UV_BITS

See Also:

Constant Field Values

MAX_UV_ENTRIES

private static final int MAX_UV_ENTRIES

See Also:

Constant Field Values

cgNormals

private static final double[][][][] cgNormals

MAX_Y_ANG

private static final double MAX_Y_ANG

See Also:

Constant Field Values

UNITY_14

private static final double UNITY_14

See Also:

Constant Field Values

inverseSine

private static final short[][] inverseSine

MAX_SIN_14BIT

private static final short MAX_SIN_14BIT

See Also:

Constant Field Values

Constructor Detail

CompressionStreamNormal

CompressionStreamNormal(CompressionStream stream,
                       Vector3f normal)

Create a CompressionStreamNormal.

Parameters:

stream - CompressionStream associated with this element

normal - floating-point representation to be encoded

Method Detail

computeNormals

private static void computeNormals()

computeInverseSineTables

private static void computeInverseSineTables()

quantize

void quantize(CompressionStream stream,
            HuffmanTable huffmanTable)

Quantize the floating point normal to a 6-bit octant/sextant plus u,v components of [0..6] bits. Full resolution is 18 bits and the minimum is 6 bits.

Specified by:

quantize in class CompressionStreamElement

Parameters:

stream - CompressionStream associated with this element

table - HuffmanTable for collecting data about the quantized representation of this element

outputCommand

void outputCommand(HuffmanTable table,
                 CommandStream output)

Output a setNormal command.

Overrides:

outputCommand in class CompressionStreamElement

Parameters:

table - HuffmanTable mapping quantized representations to compressed encodings

output - CommandStream for collecting compressed output

outputSubcommand

void outputSubcommand(HuffmanTable table,
                    CommandStream output)

Output a normal subcommand.

Parameters:

table - HuffmanTable mapping quantized representations to compressed encodings

output - CommandStream for collecting compressed output

outputNormal

private void outputNormal(HuffmanTable table,
                CommandStream output,
                int header,
                int headerLength)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object