OpenVDB: openvdb/math/Half.h File Reference

OpenVDB 12.1.1

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Half.h File Reference
`#include <openvdb/Platform.h>`
`#include <openvdb/version.h>`
`#include <iostream>`
`#include <stdint.h>`
`#include <stdio.h>`
`#include <limits>`

Go to the source code of this file.

## Classes
union | imath_half_uif
| a type for both C-only programs and C++ to use the same utilities More...
class | half
class | numeric_limits< openvdb::math::internal::half >

## Namespaces
namespace | openvdb
namespace | openvdb::v12_1
namespace | openvdb::v12_1::math
namespace | openvdb::v12_1::math::internal
namespace | std

## Macros
#define | IMATH_HALF_NO_LOOKUP_TABLE
#define | VDBB_HALF_DENORM_MIN 5.96046448e-08
| Smallest positive denormalized half.
#define | VDB_HALF_NRM_MIN 6.10351562e-05
| Smallest positive normalized half.
#define | VDB_HALF_MIN 6.10351562e-05f
| Smallest positive normalized half.
#define | VDB_HALF_MAX 65504.0
| Largest positive half.
#define | VDB_HALF_EPSILON 0.00097656
| Smallest positive e for which half(1.0 + e) != half(1.0).
#define | VDB_HALF_MANT_DIG 11
| Number of digits in mantissa (significand + hidden leading 1).
#define | VDB_HALF_DIG 3
#define | VDB_HALF_DECIMAL_DIG 5
#define | VDB_HALF_RADIX 2
| Base of the exponent.
#define | VDBB_HALF_DENORM_MIN_EXP -13
#define | VDB_HALF_MAX_EXP 16
#define | VDBB_HALF_DENORM_MIN_10_EXP -4
#define | VDB_HALF_MAX_10_EXP 4

## Typedefs
typedef union openvdb::v12_1::math::internal::imath_half_uif | imath_half_uif_t
| a type for both C-only programs and C++ to use the same utilities
typedef uint16_t | imath_half_bits_t
| a type for both C-only programs and C++ to use the same utilities
typedef imath_half_bits_t | half
| if we're in a C-only context, alias the half bits type to half

## Functions
static float | imath_half_to_float (imath_half_bits_t h)
static imath_half_bits_t | imath_float_to_half (float f)
OPENVDB_API void | printBits (std::ostream &os, half h)
OPENVDB_API void | printBits (std::ostream &os, float f)
OPENVDB_API void | printBits (char c[19], half h)
OPENVDB_API void | printBits (char c[35], float f)
OPENVDB_API std::ostream & | operator<< (std::ostream &os, half h)
| Output h to os, formatted as a float.
OPENVDB_API std::istream & | operator>> (std::istream &is, half &h)
| Input h from is.

## Macro Definition Documentation

## ◆ IMATH_HALF_NO_LOOKUP_TABLE

#define IMATH_HALF_NO_LOOKUP_TABLE

## ◆ VDB_HALF_DECIMAL_DIG

#define VDB_HALF_DECIMAL_DIG 5

Number of base-10 digits that are necessary to uniquely represent all distinct values:

ceil(HALF_MANT_DIG * log10(2) + 1) => 4.31... -> 5

## ◆ VDB_HALF_DIG

#define VDB_HALF_DIG 3

Number of base 10 digits that can be represented without change:

floor( (HALF_MANT_DIG - 1) * log10(2) ) => 3.01... -> 3

## ◆ VDB_HALF_EPSILON

#define VDB_HALF_EPSILON 0.00097656

Smallest positive e for which half(1.0 + e) != half(1.0).

## ◆ VDB_HALF_MANT_DIG

#define VDB_HALF_MANT_DIG 11

Number of digits in mantissa (significand + hidden leading 1).

## ◆ VDB_HALF_MAX

#define VDB_HALF_MAX 65504.0

Largest positive half.

## ◆ VDB_HALF_MAX_10_EXP

#define VDB_HALF_MAX_10_EXP 4

Maximum positive integer such that 10 raised to that power is a normalized half

## ◆ VDB_HALF_MAX_EXP

#define VDB_HALF_MAX_EXP 16

Maximum positive integer such that HALF_RADIX raised to the power of one less than that integer is a normalized half

## ◆ VDB_HALF_MIN

#define VDB_HALF_MIN 6.10351562e-05f

Smallest positive normalized half.

## ◆ VDB_HALF_NRM_MIN

#define VDB_HALF_NRM_MIN 6.10351562e-05

Smallest positive normalized half.

## ◆ VDB_HALF_RADIX

#define VDB_HALF_RADIX 2

Base of the exponent.

## ◆ VDBB_HALF_DENORM_MIN

#define VDBB_HALF_DENORM_MIN 5.96046448e-08

Smallest positive denormalized half.

## ◆ VDBB_HALF_DENORM_MIN_10_EXP

#define VDBB_HALF_DENORM_MIN_10_EXP -4

Minimum positive integer such that 10 raised to that power is a normalized half

## ◆ VDBB_HALF_DENORM_MIN_EXP

#define VDBB_HALF_DENORM_MIN_EXP -13

Minimum negative integer such that HALF_RADIX raised to the power of one less than that integer is a normalized half