Irrlicht 3D Engine: irr::core Namespace Reference

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Classes | Typedefs | Enumerations | Functions | Variables
irr::core Namespace Reference

Basic classes such as vectors, planes, arrays, lists, and so on can be found in this namespace. More...

## Classes

- class aabbox3d
    Axis aligned bounding box in 3d dimensional space. More...
- class array
    Self reallocating template array (like stl vector) with additional features. More...
- class CMatrix4
    4x4 matrix. Mostly used as transformation matrix for 3d calculations. More...
- class dimension2d
    Specifies a 2 dimensional size. More...
- union FloatIntUnion32
- union inttofloat
- class irrAllocator
    Very simple allocator implementation, containers using it can be used across dll boundaries. More...
- class irrAllocatorFast
    Fast allocator, only to be used in containers inside the same memory heap. More...
- class line2d
    2D line between two points with intersection methods. More...
- class line3d
    3D line between two points with intersection methods. More...
- class list
    Doubly linked list template. More...
- class map
    map template for associative arrays using a red-black tree More...
- class plane3d
    Template plane class with some intersection testing methods. More...
- class quaternion
    Quaternion class for representing rotations. More...
- class rect
    Rectangle template. More...
- class string
- class triangle3d
    3d triangle template class for doing collision detection and other things. More...
- class vector2d
    2d vector template class with lots of operators and methods. More...
- class vector3d
    3d vector template class with lots of operators and methods. More...

## Typedefs

- typedef aabbox3d< f32 > aabbox3df
    Typedef for a f32 3d bounding box.
- typedef aabbox3d< s32 > aabbox3di
    Typedef for an integer 3d bounding box.
- typedef dimension2d< f32 > dimension2df
    Typedef for an f32 dimension.
- typedef dimension2d< s32 > dimension2di
    Typedef for an integer dimension.
- typedef dimension2d< u32 > dimension2du
    Typedef for an unsigned integer dimension.
- typedef line2d< f32 > line2df
    Typedef for an f32 line.
- typedef line2d< s32 > line2di
    Typedef for an integer line.
- typedef line3d< f32 > line3df
    Typedef for an f32 line.
- typedef line3d< s32 > line3di
    Typedef for an integer line.
- typedef CMatrix4< f32 > matrix4
    Typedef for f32 matrix.
- typedef plane3d< f32 > plane3df
    Typedef for a f32 3d plane.
- typedef plane3d< s32 > plane3di
    Typedef for an integer 3d plane.
- typedef vector2d< f32 > position2df
- typedef vector2d< s32 > position2di
- typedef rect< f32 > rectf
    Rectangle with float values.
- typedef rect< s32 > recti
    Rectangle with int values.
- typedef string< c8 > stringc
    Typedef for character strings.
- typedef string< wchar_t > stringw
    Typedef for wide character strings.
- typedef triangle3d< f32 > triangle3df
    Typedef for a f32 3d triangle.
- typedef triangle3d< s32 > triangle3di
    Typedef for an integer 3d triangle.
- typedef vector2d< f32 > vector2df
    Typedef for f32 2d vector.
- typedef vector2d< s32 > vector2di
    Typedef for integer 2d vector.
- typedef vector3d< f32 > vector3df
    Typedef for a f32 3d vector.
- typedef vector3d< s32 > vector3di
    Typedef for an integer 3d vector.

## Enumerations

- enum eAllocStrategy { ALLOC_STRATEGY_SAFE = 0, ALLOC_STRATEGY_DOUBLE = 1, ALLOC_STRATEGY_SQRT = 2 }
    defines an allocation strategy More...
- enum EIntersectionRelation3D {
  ISREL3D_FRONT = 0, ISREL3D_BACK, ISREL3D_PLANAR, ISREL3D_SPANNING,
  ISREL3D_CLIPPED
  }
    Enumeration for intersection relations of 3d objects. More...
- enum eLocaleID { IRR_LOCALE_ANSI = 0, IRR_LOCALE_GERMAN = 1 }
    Very simple string class with some useful features. More...

## Functions

- template<class T > T abs_ (const T &a)
    returns abs of two values. Own implementation to get rid of STL (VS6 problems)
- REALINLINE s32 ceil32 (f32 x)
- template<class T > const T clamp (const T &value, const T &low, const T &high)
    clamps a value between low and high
- REALINLINE void clearFPUException ()
- u32 ctoul16 (char in)
    Convert a hex-encoded character to an unsigned integer.
- io::path & cutFilenameExtension (io::path &dest, const io::path &source)
    cut the filename extension from a source file path and store it in a dest file path
- f32 degToRad (f32 degrees)
    Utility function to convert a degrees value to radians.
- f64 degToRad (f64 degrees)
    Utility function to convert a degrees value to radians.
- io::path & deletePathFromFilename (io::path &filename)
    delete path from filename
- io::path & deletePathFromPath (io::path &filename, s32 pathCount)
    trim paths
- bool equals (const f64 a, const f64 b, const f64 tolerance=ROUNDING_ERROR_f64)
    returns if a equals b, taking possible rounding errors into account
- bool equals (const f32 a, const f32 b, const f32 tolerance=ROUNDING_ERROR_f32)
    returns if a equals b, taking possible rounding errors into account
- bool equals (const s32 a, const s32 b, const s32 tolerance=ROUNDING_ERROR_S32)
    returns if a equals b, taking an explicit rounding tolerance into account
- bool equals (const u32 a, const u32 b, const s32 tolerance=ROUNDING_ERROR_S32)
    returns if a equals b, taking an explicit rounding tolerance into account
- bool equals (const s64 a, const s64 b, const s64 tolerance=ROUNDING_ERROR_S64)
    returns if a equals b, taking an explicit rounding tolerance into account
- bool equalsByUlp (f32 a, f32 b, int maxUlpDiff)
    We compare the difference in ULP's (spacing between floating-point numbers, aka ULP=1 means there exists no float between).
- f32 f32_max3 (const f32 a, const f32 b, const f32 c)
- f32 f32_min3 (const f32 a, const f32 b, const f32 c)
- float fast_atof (const char *floatAsString, const char **out=0)
    Convert a string to a floating point number.
- const char * fast_atof_move (const char *in, f32 &result)
    Provides a fast function for converting a string into a float.
- REALINLINE s32 floor32 (f32 x)
- f32 FR (u32 x)
    Floating-point representation of an integer value.
- f32 FR (s32 x)
- f32 fract (f32 x)
- io::path & getFileNameExtension (io::path &dest, const io::path &source)
    get the filename extension from a file path
- bool hasFileExtension (const io::path &filename, const io::path &ext0, const io::path &ext1="", const io::path &ext2="")
    search if a filename has a proper extension
- template<class T > void heapsink (T *array, s32 element, s32 max)
    Sinks an element into the heap.
- template<class T > void heapsort (T *array_, s32 size)
    Sorts an array with size 'size' using heapsort.
- REALINLINE u32 if_c_a_else_0 (const s32 condition, const u32 a)
    conditional set based on mask and arithmetic shift
- REALINLINE u32 if_c_a_else_b (const s32 condition, const u32 a, const u32 b)
    conditional set based on mask and arithmetic shift
- REALINLINE u16 if_c_a_else_b (const s16 condition, const u16 a, const u16 b)
    conditional set based on mask and arithmetic shift
- u32 IR (f32 x)
- s32 isdigit (s32 c)
    some standard function ( to remove dependencies )
- s32 isFileExtension (const io::path &filename, const io::path &ext0, const io::path &ext1, const io::path &ext2)
    search if a filename has a proper extension
- s32 isInSameDirectory (const io::path &path, const io::path &file)
- bool isnotzero (const f32 a, const f32 tolerance=ROUNDING_ERROR_f32)
    returns if a equals not zero, taking rounding errors into account
- s32 isspace (s32 c)
- s32 isupper (s32 c)
- bool iszero (const f64 a, const f64 tolerance=ROUNDING_ERROR_f64)
    returns if a equals zero, taking rounding errors into account
- bool iszero (const f32 a, const f32 tolerance=ROUNDING_ERROR_f32)
    returns if a equals zero, taking rounding errors into account
- bool iszero (const s32 a, const s32 tolerance=0)
    returns if a equals zero, taking rounding errors into account
- bool iszero (const u32 a, const u32 tolerance=0)
    returns if a equals zero, taking rounding errors into account
- bool iszero (const s64 a, const s64 tolerance=0)
    returns if a equals zero, taking rounding errors into account
- template<class T > T lerp (const T &a, const T &b, const f32 t)
- template<class T > const T & max_ (const T &a, const T &b)
    returns maximum of two values. Own implementation to get rid of the STL (VS6 problems)
- template<class T > const T & max_ (const T &a, const T &b, const T &c)
    returns maximum of three values. Own implementation to get rid of the STL (VS6 problems)
- template<class T > const T & min_ (const T &a, const T &b)
    returns minimum of two values. Own implementation to get rid of the STL (VS6 problems)
- template<class T > const T & min_ (const T &a, const T &b, const T &c)
    returns minimum of three values. Own implementation to get rid of the STL (VS6 problems)
- template<class S , class T > vector2d< T > operator* (const S scalar, const vector2d< T > &vector)
- template<class S , class T > vector3d< T > operator* (const S scalar, const vector3d< T > &vector)
    Function multiplying a scalar and a vector component-wise.
- template<class T > CMatrix4< T > operator* (const T scalar, const CMatrix4< T > &mat)
- f32 radToDeg (f32 radians)
    Utility function to convert a radian value to degrees.
- f64 radToDeg (f64 radians)
    Utility function to convert a radian value to degrees.
- REALINLINE f32 reciprocal (const f32 f)
- REALINLINE f64 reciprocal (const f64 f)
- REALINLINE f32 reciprocal_approxim (const f32 f)
- REALINLINE f64 reciprocal_squareroot (const f64 x)
- REALINLINE f32 reciprocal_squareroot (const f32 f)
- REALINLINE s32 reciprocal_squareroot (const s32 x)
- REALINLINE s32 round32 (f32 x)
- f32 round_ (f32 x)
- s32 s32_clamp (s32 value, s32 low, s32 high)
- s32 s32_max (s32 a, s32 b)
- s32 s32_min (s32 a, s32 b)
- REALINLINE void setbit_cond (u32 &state, s32 condition, u32 mask)
- REALINLINE f32 squareroot (const f32 f)
- REALINLINE f64 squareroot (const f64 f)
- REALINLINE s32 squareroot (const s32 f)
- REALINLINE s64 squareroot (const s64 f)
- f32 strtof10 (const char *in, const char **out=0)
    Converts a sequence of digits into a whole positive floating point value.
- s32 strtol10 (const char *in, const char **out=0)
    Convert a simple string of base 10 digits into a signed 32 bit integer.
- u32 strtoul10 (const char *in, const char **out=0)
    Convert a simple string of base 10 digits into an unsigned 32 bit integer.
- u32 strtoul16 (const char *in, const char **out=0)
    Convert a simple string of base 16 digits into an unsigned 32 bit integer.
- u32 strtoul8 (const char *in, const char **out=0)
    Convert a simple string of base 8 digits into an unsigned 32 bit integer.
- u32 strtoul_prefix (const char *in, const char **out=0)
    Convert a C-style prefixed string (hex, oct, integer) into an unsigned 32 bit integer.
- template<class T1 , class T2 > void swap (T1 &a, T2 &b)
    swaps the content of the passed parameters

## Variables

- const f32 DEGTORAD = PI / 180.0f
    32bit Constant for converting from degrees to radians
- const f64 DEGTORAD64 = PI64 / 180.0
    64bit constant for converting from degrees to radians (formally known as GRAD_PI2)
- const float fast_atof_table [17]
- const f32 HALF_PI = PI/2.0f
    Constant for half of PI.
- IRRLICHT_API const matrix4 IdentityMatrix
    global const identity matrix
- IRRLICHT_API irr::core::stringc LOCALE_DECIMAL_POINTS
    Selection of characters which count as decimal point in fast_atof.
- const f32 PI = 3.14159265359f
    Constant for PI.
- const f64 PI64 = 3.1415926535897932384626433832795028841971693993751
    Constant for 64bit PI.
- const f32 RADTODEG = 180.0f / PI
    32bit constant for converting from radians to degrees (formally known as GRAD_PI)
- const f64 RADTODEG64 = 180.0 / PI64
    64bit constant for converting from radians to degrees
- const f32 RECIPROCAL_PI = 1.0f/PI
    Constant for reciprocal of PI.
- const f64 RECIPROCAL_PI64 = 1.0/PI64
    Constant for 64bit reciprocal of PI.
- const f32 ROUNDING_ERROR_f32 = 0.000001f
- const f64 ROUNDING_ERROR_f64 = 0.00000001
- const s32 ROUNDING_ERROR_S32 = 0
    Rounding error constant often used when comparing f32 values.
- const s64 ROUNDING_ERROR_S64 = 0

## Detailed Description

Basic classes such as vectors, planes, arrays, lists, and so on can be found in this namespace.

## Typedef Documentation

typedef aabbox3d<f32> irr::core::aabbox3df

Typedef for a f32 3d bounding box.

Definition at line 324 of file aabbox3d.h.

typedef aabbox3d<s32> irr::core::aabbox3di

Typedef for an integer 3d bounding box.

Definition at line 326 of file aabbox3d.h.

typedef dimension2d<f32> irr::core::dimension2df

Typedef for an f32 dimension.

Definition at line 210 of file dimension2d.h.

typedef dimension2d<s32> irr::core::dimension2di

Typedef for an integer dimension.

There are few cases where negative dimensions make sense. Please consider using dimension2du instead.

Definition at line 217 of file dimension2d.h.

typedef dimension2d<u32> irr::core::dimension2du

Typedef for an unsigned integer dimension.

Definition at line 212 of file dimension2d.h.

typedef line2d<f32> irr::core::line2df

Typedef for an f32 line.

Definition at line 266 of file line2d.h.

typedef line2d<s32> irr::core::line2di

Typedef for an integer line.

Definition at line 268 of file line2d.h.

typedef line3d<f32> irr::core::line3df

Typedef for an f32 line.

Definition at line 136 of file line3d.h.

typedef line3d<s32> irr::core::line3di

Typedef for an integer line.

Definition at line 138 of file line3d.h.

typedef CMatrix4<f32> irr::core::matrix4

Typedef for f32 matrix.

Definition at line 2235 of file matrix4.h.

typedef plane3d<f32> irr::core::plane3df

Typedef for a f32 3d plane.

Definition at line 236 of file plane3d.h.

typedef plane3d<s32> irr::core::plane3di

Typedef for an integer 3d plane.

Definition at line 239 of file plane3d.h.

typedef vector2d<f32> irr::core::position2df

Deprecated:
  position2d is now a synonym for vector2d, but vector2d should be used directly.

Definition at line 21 of file position2d.h.

typedef vector2d<s32> irr::core::position2di

Deprecated:
  position2d is now a synonym for vector2d, but vector2d should be used directly.

Definition at line 24 of file position2d.h.

typedef rect<f32> irr::core::rectf

Rectangle with float values.

Definition at line 271 of file rect.h.

typedef rect<s32> irr::core::recti

Rectangle with int values.

Definition at line 273 of file rect.h.

typedef string<c8> irr::core::stringc

Typedef for character strings.

Definition at line 1358 of file irrString.h.

typedef string<wchar_t> irr::core::stringw

Typedef for wide character strings.

Definition at line 1361 of file irrString.h.

typedef triangle3d<f32> irr::core::triangle3df

Typedef for a f32 3d triangle.

Definition at line 270 of file triangle3d.h.

typedef triangle3d<s32> irr::core::triangle3di

Typedef for an integer 3d triangle.

Definition at line 273 of file triangle3d.h.

typedef vector2d<f32> irr::core::vector2df

Typedef for f32 2d vector.

Definition at line 323 of file vector2d.h.

typedef vector2d<s32> irr::core::vector2di

Typedef for integer 2d vector.

Definition at line 326 of file vector2d.h.

typedef vector3d<f32> irr::core::vector3df

Typedef for a f32 3d vector.

Definition at line 445 of file vector3d.h.

typedef vector3d<s32> irr::core::vector3di

Typedef for an integer 3d vector.

Definition at line 448 of file vector3d.h.

## Enumeration Type Documentation

enum irr::core::eAllocStrategy

defines an allocation strategy

Enumerator:

  ALLOC_STRATEGY_SAFE |
  ALLOC_STRATEGY_DOUBLE |
  ALLOC_STRATEGY_SQRT |

Definition at line 112 of file irrAllocator.h.

enum irr::core::EIntersectionRelation3D

Enumeration for intersection relations of 3d objects.

Enumerator:

  ISREL3D_FRONT |
  ISREL3D_BACK |
  ISREL3D_PLANAR |
  ISREL3D_SPANNING |
  ISREL3D_CLIPPED |

Definition at line 17 of file plane3d.h.

enum irr::core::eLocaleID

Very simple string class with some useful features.

string<c8> and string<wchar_t> both accept Unicode AND ASCII/Latin-1, so you can assign Unicode to string<c8> and ASCII/Latin-1 to string<wchar_t> (and the other way round) if you want to.

However, note that the conversation between both is not done using any encoding. This means that c8 strings are treated as ASCII/Latin-1, not UTF-8, and are simply expanded to the equivalent wchar_t, while Unicode/wchar_t characters are truncated to 8-bit ASCII/Latin-1 characters, discarding all other information in the wchar_t.

Enumerator:

  IRR_LOCALE_ANSI |
  IRR_LOCALE_GERMAN |

Definition at line 32 of file irrString.h.

## Function Documentation

template<class T >

T irr::core::abs_ | ( | const T & | a | ) | `[inline]`

returns abs of two values. Own implementation to get rid of STL (VS6 problems)

Definition at line 151 of file irrMath.h.

Referenced by equalsByUlp(), and iszero().

REALINLINE s32 irr::core::ceil32 | ( | f32 | x | ) |

Definition at line 646 of file irrMath.h.

template<class T >

const T irr::core::clamp | ( | const T & | value,
|  | const T & | low,
|  | const T & | high
| ) |  | `[inline]`

clamps a value between low and high

Definition at line 166 of file irrMath.h.

References max_(), and min_().

Referenced by irr::scene::quake3::dumpShader(), irr::core::string< fschar_t >::findLast(), irr::core::vector2d< f32 >::getAngle(), irr::video::S3DVertex::getInterpolated(), irr::video::S3DVertex2TCoords::getInterpolated(), irr::video::S3DVertexTangents::getInterpolated(), irr::video::SColor::getInterpolated(), irr::video::SColorf::getInterpolated(), irr::video::SColor::getInterpolated_quadratic(), irr::video::SColorf::getInterpolated_quadratic(), irr::core::CMatrix4< T >::getRotationDegrees(), irr::scene::SVertexColorBrightnessManipulator::operator()(), irr::scene::SVertexColorContrastManipulator::operator()(), irr::scene::SVertexColorContrastBrightnessManipulator::operator()(), irr::scene::SVertexColorGammaManipulator::operator()(), irr::scene::SVertexColorScaleManipulator::operator()(), and irr::core::quaternion::toEuler().

REALINLINE void irr::core::clearFPUException | ( |  | ) |

Definition at line 454 of file irrMath.h.

u32 irr::core::ctoul16 | ( | char | in | ) | `[inline]`

Convert a hex-encoded character to an unsigned integer.

Parameters:

  [in] | in | The digit to convert. Only digits 0 to 9 and chars A-F,a-f will be considered.

Returns:
  The unsigned integer value of the digit. 0xffffffff if the input is not hex

Definition at line 126 of file fast_atof.h.

io::path& irr::core::cutFilenameExtension | ( | io::path & | dest,
|  | const io::path & | source
| ) |  | `[inline]`

cut the filename extension from a source file path and store it in a dest file path

Definition at line 49 of file coreutil.h.

References irr::core::string< T, TAlloc >::findLast(), irr::core::string< T, TAlloc >::size(), and irr::core::string< T, TAlloc >::subString().

Referenced by irr::scene::quake3::getTextures().

f32 irr::core::degToRad | ( | f32 | degrees | ) | `[inline]`

Utility function to convert a degrees value to radians.

Provided as it can be clearer to write degToRad(X) than DEGTORAD * X

Parameters:

  degrees | The degrees value to convert to radians.

Definition at line 107 of file irrMath.h.

References DEGTORAD.

f64 irr::core::degToRad | ( | f64 | degrees | ) | `[inline]`

Utility function to convert a degrees value to radians.

Provided as it can be clearer to write degToRad(X) than DEGTORAD * X

Parameters:

  degrees | The degrees value to convert to radians.

Definition at line 116 of file irrMath.h.

References DEGTORAD64.

io::path& irr::core::deletePathFromFilename | ( | io::path & | filename | ) | `[inline]`

delete path from filename

Definition at line 68 of file coreutil.h.

References irr::core::string< T, TAlloc >::c_str(), and irr::core::string< T, TAlloc >::size().

io::path& irr::core::deletePathFromPath | ( | io::path & | filename,
|  | s32 | pathCount
| ) |  | `[inline]`

trim paths

Definition at line 87 of file coreutil.h.

References irr::core::string< T, TAlloc >::size(), and irr::core::string< T, TAlloc >::validate().

bool irr::core::equals | ( | const f64 | a,
|  | const f64 | b,
|  | const f64 | tolerance = `ROUNDING_ERROR_f64`
| ) |  | `[inline]`

returns if a equals b, taking possible rounding errors into account

Definition at line 185 of file irrMath.h.

Referenced by irr::core::CMatrix4< T >::equals(), irr::video::SColorHSL::fromRGB(), irr::core::line2d< T >::intersectWith(), irr::core::CMatrix4< T >::isIdentity(), irr::core::vector3d< f32 >::operator<(), irr::core::vector2d< f32 >::operator<(), irr::core::vector3d< f32 >::operator<=(), irr::core::vector2d< f32 >::operator<=(), irr::core::dimension2d< u32 >::operator==(), irr::core::plane3d< f32 >::operator==(), irr::core::vector3d< f32 >::operator>(), irr::core::vector2d< f32 >::operator>(), irr::core::vector3d< f32 >::operator>=(), irr::core::vector2d< f32 >::operator>=(), and irr::core::quaternion::toEuler().

bool irr::core::equals | ( | const f32 | a,
|  | const f32 | b,
|  | const f32 | tolerance = `ROUNDING_ERROR_f32`
| ) |  | `[inline]`

returns if a equals b, taking possible rounding errors into account

Definition at line 191 of file irrMath.h.

bool irr::core::equals | ( | const s32 | a,
|  | const s32 | b,
|  | const s32 | tolerance = `ROUNDING_ERROR_S32`
| ) |  | `[inline]`

returns if a equals b, taking an explicit rounding tolerance into account

Definition at line 250 of file irrMath.h.

bool irr::core::equals | ( | const u32 | a,
|  | const u32 | b,
|  | const s32 | tolerance = `ROUNDING_ERROR_S32`
| ) |  | `[inline]`

returns if a equals b, taking an explicit rounding tolerance into account

Definition at line 256 of file irrMath.h.

bool irr::core::equals | ( | const s64 | a,
|  | const s64 | b,
|  | const s64 | tolerance = `ROUNDING_ERROR_S64`
| ) |  | `[inline]`

returns if a equals b, taking an explicit rounding tolerance into account

Definition at line 263 of file irrMath.h.

bool irr::core::equalsByUlp | ( | f32 | a,
|  | f32 | b,
|  | int | maxUlpDiff
| ) |  | `[inline]`

We compare the difference in ULP's (spacing between floating-point numbers, aka ULP=1 means there exists no float between).

Definition at line 208 of file irrMath.h.

References abs_(), irr::core::FloatIntUnion32::i, and irr::core::FloatIntUnion32::sign().

f32 irr::core::f32_max3 | ( | const f32 | a,
|  | const f32 | b,
|  | const f32 | c
| ) |  | `[inline]`

Definition at line 708 of file irrMath.h.

f32 irr::core::f32_min3 | ( | const f32 | a,
|  | const f32 | b,
|  | const f32 | c
| ) |  | `[inline]`

Definition at line 713 of file irrMath.h.

float irr::core::fast_atof | ( | const char * | floatAsString,
|  | const char ** | out = `0`
| ) |  | `[inline]`

Convert a string to a floating point number.

Parameters:

  floatAsString | The string to convert.
  out | Optional pointer to the first character in the string that wasn't used to create the float value.

Returns:
  Float value parsed from the input string

Definition at line 360 of file fast_atof.h.

References fast_atof_move().

const char* irr::core::fast_atof_move | ( | const char * | in,
|  | f32 & | result
| ) |  | `[inline]`

Provides a fast function for converting a string into a float.

This is not guaranteed to be as accurate as atof(), but is approximately 6 to 8 times as fast.

Parameters:

  [in] | in | The string to convert.
  [out] | result | The resultant float will be written here.

Returns:
  Pointer to the first character in the string that wasn't used to create the float value.

Definition at line 310 of file fast_atof.h.

References fast_atof_table, irr::core::string< T, TAlloc >::findFirst(), IRR_ATOF_TABLE_SIZE, LOCALE_DECIMAL_POINTS, strtof10(), and strtol10().

Referenced by fast_atof(), and irr::scene::quake3::getAsFloat().

REALINLINE s32 irr::core::floor32 | ( | f32 | x | ) |

Definition at line 613 of file irrMath.h.

Referenced by irr::video::SColor::getInterpolated_quadratic(), and irr::gui::IGUIElement::setRelativePositionProportional().

f32 irr::core::FR | ( | u32 | x | ) | `[inline]`

Floating-point representation of an integer value.

Definition at line 363 of file irrMath.h.

References irr::core::inttofloat::f, and irr::core::inttofloat::u.

Referenced by irr::video::pack_textureBlendFunc().

f32 irr::core::FR | ( | s32 | x | ) | `[inline]`

Definition at line 364 of file irrMath.h.

References irr::core::inttofloat::f, and irr::core::inttofloat::s.

f32 irr::core::fract | ( | f32 | x | ) | `[inline]`

Definition at line 718 of file irrMath.h.

Referenced by irr::scene::quake3::SModifierFunction::evaluate().

io::path& irr::core::getFileNameExtension | ( | io::path & | dest,
|  | const io::path & | source
| ) |  | `[inline]`

get the filename extension from a file path

Definition at line 57 of file coreutil.h.

References irr::core::string< T, TAlloc >::findLast(), irr::core::string< T, TAlloc >::size(), and irr::core::string< T, TAlloc >::subString().

bool irr::core::hasFileExtension | ( | const io::path & | filename,
|  | const io::path & | ext0,
|  | const io::path & | ext1 = `""`,
|  | const io::path & | ext2 = `""`
| ) |  | `[inline]`

search if a filename has a proper extension

Definition at line 40 of file coreutil.h.

References isFileExtension().

template<class T >

void irr::core::heapsink | ( | T * | array,
|  | s32 | element,
|  | s32 | max
| ) |  | `[inline]`

Sinks an element into the heap.

Definition at line 17 of file heapsort.h.

Referenced by heapsort().

template<class T >

void irr::core::heapsort | ( | T * | array_,
|  | s32 | size
| ) |  | `[inline]`

Sorts an array with size 'size' using heapsort.

Definition at line 41 of file heapsort.h.

References heapsink().

Referenced by irr::core::array< IMesh * >::sort().

REALINLINE u32 irr::core::if_c_a_else_0 | ( | const s32 | condition,
|  | const u32 | a
| ) |  |

conditional set based on mask and arithmetic shift

Definition at line 433 of file irrMath.h.

REALINLINE u32 irr::core::if_c_a_else_b | ( | const s32 | condition,
|  | const u32 | a,
|  | const u32 | b
| ) |  |

conditional set based on mask and arithmetic shift

Definition at line 421 of file irrMath.h.

REALINLINE u16 irr::core::if_c_a_else_b | ( | const s16 | condition,
|  | const u16 | a,
|  | const u16 | b
| ) |  |

conditional set based on mask and arithmetic shift

Definition at line 427 of file irrMath.h.

u32 irr::core::IR | ( | f32 | x | ) | `[inline]`

code is taken from IceFPU Integer representation of a floating-point value.

Definition at line 353 of file irrMath.h.

References irr::core::inttofloat::f, and irr::core::inttofloat::u.

Referenced by irr::core::CMatrix4< T >::isIdentity_integer_base(), and irr::video::unpack_textureBlendFunc().

s32 irr::core::isdigit | ( | s32 | c | ) | `[inline]`

some standard function ( to remove dependencies )

Definition at line 180 of file coreutil.h.

s32 irr::core::isFileExtension | ( | const io::path & | filename,
|  | const io::path & | ext0,
|  | const io::path & | ext1,
|  | const io::path & | ext2
| ) |  | `[inline]`

search if a filename has a proper extension

Definition at line 23 of file coreutil.h.

References irr::core::string< T, TAlloc >::equals_substring_ignore_case(), and irr::core::string< T, TAlloc >::findLast().

Referenced by hasFileExtension().

s32 irr::core::isInSameDirectory | ( | const io::path & | path,
|  | const io::path & | file
| ) |  | `[inline]`

looks if file is in the same directory of path. returns offset of directory. 0 means in same directory. 1 means file is direct child of path

Definition at line 115 of file coreutil.h.

References irr::core::string< T, TAlloc >::equalsn(), irr::core::string< T, TAlloc >::findNext(), and irr::core::string< T, TAlloc >::size().

bool irr::core::isnotzero | ( | const f32 | a,
|  | const f32 | tolerance = `ROUNDING_ERROR_f32`
| ) |  | `[inline]`

returns if a equals not zero, taking rounding errors into account

Definition at line 282 of file irrMath.h.

s32 irr::core::isspace | ( | s32 | c | ) | `[inline]`

Definition at line 181 of file coreutil.h.

s32 irr::core::isupper | ( | s32 | c | ) | `[inline]`

Definition at line 182 of file coreutil.h.

bool irr::core::iszero | ( | const f64 | a,
|  | const f64 | tolerance = `ROUNDING_ERROR_f64`
| ) |  | `[inline]`

returns if a equals zero, taking rounding errors into account

Definition at line 270 of file irrMath.h.

Referenced by irr::core::triangle3d< T >::getIntersectionOfPlaneWithLine(), irr::core::CMatrix4< T >::getInverse(), irr::core::CMatrix4< T >::getRotationDegrees(), irr::core::CMatrix4< T >::getScale(), irr::core::CMatrix4< T >::isOrthogonal(), irr::core::quaternion::toAngleAxis(), and irr::video::SColorHSL::toRGB().

bool irr::core::iszero | ( | const f32 | a,
|  | const f32 | tolerance = `ROUNDING_ERROR_f32`
| ) |  | `[inline]`

returns if a equals zero, taking rounding errors into account

Definition at line 276 of file irrMath.h.

bool irr::core::iszero | ( | const s32 | a,
|  | const s32 | tolerance = `0`
| ) |  | `[inline]`

returns if a equals zero, taking rounding errors into account

Definition at line 288 of file irrMath.h.

bool irr::core::iszero | ( | const u32 | a,
|  | const u32 | tolerance = `0`
| ) |  | `[inline]`

returns if a equals zero, taking rounding errors into account

Definition at line 294 of file irrMath.h.

bool irr::core::iszero | ( | const s64 | a,
|  | const s64 | tolerance = `0`
| ) |  | `[inline]`

returns if a equals zero, taking rounding errors into account

Definition at line 301 of file irrMath.h.

References abs_().

template<class T >

T irr::core::lerp | ( | const T & | a,
|  | const T & | b,
|  | const f32 | t
| ) |  | `[inline]`

returns linear interpolation of a and b with ratio t

Returns:
  : a if t==0, b if t==1, and the linear interpolation else

Definition at line 159 of file irrMath.h.

template<class T >

const T& irr::core::max_ | ( | const T & | a,
|  | const T & | b
| ) |  | `[inline]`

returns maximum of two values. Own implementation to get rid of the STL (VS6 problems)

Definition at line 137 of file irrMath.h.

Referenced by clamp(), irr::video::SColorHSL::fromRGB(), irr::video::SColor::getLightness(), and max_().

template<class T >

const T& irr::core::max_ | ( | const T & | a,
|  | const T & | b,
|  | const T & | c
| ) |  | `[inline]`

returns maximum of three values. Own implementation to get rid of the STL (VS6 problems)

Definition at line 144 of file irrMath.h.

References max_().

template<class T >

const T& irr::core::min_ | ( | const T & | a,
|  | const T & | b
| ) |  | `[inline]`

returns minimum of two values. Own implementation to get rid of the STL (VS6 problems)

Definition at line 123 of file irrMath.h.

Referenced by clamp(), irr::video::SColorHSL::fromRGB(), irr::video::SColor::getLightness(), min_(), and irr::video::SColor::operator+().

template<class T >

const T& irr::core::min_ | ( | const T & | a,
|  | const T & | b,
|  | const T & | c
| ) |  | `[inline]`

returns minimum of three values. Own implementation to get rid of the STL (VS6 problems)

Definition at line 130 of file irrMath.h.

References min_().

template<class S , class T >

vector2d<T> irr::core::operator* | ( | const S | scalar,
|  | const vector2d< T > & | vector
| ) |  |

Definition at line 329 of file vector2d.h.

template<class S , class T >

vector3d<T> irr::core::operator* | ( | const S | scalar,
|  | const vector3d< T > & | vector
| ) |  |

Function multiplying a scalar and a vector component-wise.

Definition at line 452 of file vector3d.h.

template<class T >

CMatrix4<T> irr::core::operator* | ( | const T | scalar,
|  | const CMatrix4< T > & | mat
| ) |  | `[inline]`

Definition at line 2228 of file matrix4.h.

f32 irr::core::radToDeg | ( | f32 | radians | ) | `[inline]`

Utility function to convert a radian value to degrees.

Provided as it can be clearer to write radToDeg(X) than RADTODEG * X

Parameters:

  radians | The radians value to convert to degrees.

Definition at line 89 of file irrMath.h.

References RADTODEG.

f64 irr::core::radToDeg | ( | f64 | radians | ) | `[inline]`

Utility function to convert a radian value to degrees.

Provided as it can be clearer to write radToDeg(X) than RADTODEG * X

Parameters:

  radians | The radians value to convert to degrees.

Definition at line 98 of file irrMath.h.

References RADTODEG64.

REALINLINE f32 irr::core::reciprocal | ( | const f32 | f | ) |

Definition at line 535 of file irrMath.h.

Referenced by irr::core::CMatrix4< T >::buildProjectionMatrixPerspectiveFovInfinityLH(), irr::core::CMatrix4< T >::buildProjectionMatrixPerspectiveFovLH(), irr::core::CMatrix4< T >::buildProjectionMatrixPerspectiveFovRH(), irr::core::CMatrix4< T >::getInverse(), irr::core::CMatrix4< T >::getRotationDegrees(), irr::core::quaternion::slerp(), and irr::core::quaternion::toAngleAxis().

REALINLINE f64 irr::core::reciprocal | ( | const f64 | f | ) |

Definition at line 568 of file irrMath.h.

REALINLINE f32 irr::core::reciprocal_approxim | ( | const f32 | f | ) |

Definition at line 575 of file irrMath.h.

REALINLINE f64 irr::core::reciprocal_squareroot | ( | const f64 | x | ) |

Definition at line 497 of file irrMath.h.

Referenced by irr::core::vector3d< f32 >::getSphericalCoordinateAngles(), irr::core::vector3d< T >::getSphericalCoordinateAngles(), irr::core::quaternion::normalize(), irr::core::vector3d< f32 >::normalize(), irr::core::vector2d< f32 >::normalize(), reciprocal_squareroot(), and irr::scene::SViewFrustum::setFrom().

REALINLINE f32 irr::core::reciprocal_squareroot | ( | const f32 | f | ) |

Definition at line 503 of file irrMath.h.

REALINLINE s32 irr::core::reciprocal_squareroot | ( | const s32 | x | ) |

Definition at line 529 of file irrMath.h.

References reciprocal_squareroot().

REALINLINE s32 irr::core::round32 | ( | f32 | x | ) |

Definition at line 680 of file irrMath.h.

References round_().

Referenced by irr::video::SColor::getInterpolated(), irr::core::vector3d< T >::getSphericalCoordinateAngles(), irr::scene::SVertexColorContrastManipulator::operator()(), irr::scene::SVertexColorContrastBrightnessManipulator::operator()(), irr::scene::SVertexColorGammaManipulator::operator()(), irr::scene::SVertexColorScaleManipulator::operator()(), irr::scene::SVertexColorDesaturateToLightnessManipulator::operator()(), irr::scene::SVertexColorDesaturateToLuminanceManipulator::operator()(), irr::gui::IGUIElement::recalculateAbsolutePosition(), and irr::video::SColorf::toSColor().

f32 irr::core::round_ | ( | f32 | x | ) | `[inline]`

Definition at line 449 of file irrMath.h.

Referenced by round32().

s32 irr::core::s32_clamp | ( | s32 | value,
|  | s32 | low,
|  | s32 | high
| ) |  | `[inline]`

Definition at line 319 of file irrMath.h.

References s32_max(), and s32_min().

s32 irr::core::s32_max | ( | s32 | a,
|  | s32 | b
| ) |  | `[inline]`

Definition at line 313 of file irrMath.h.

Referenced by s32_clamp().

s32 irr::core::s32_min | ( | s32 | a,
|  | s32 | b
| ) |  | `[inline]`

Definition at line 307 of file irrMath.h.

Referenced by s32_clamp().

REALINLINE void irr::core::setbit_cond | ( | u32 & | state,
|  | s32 | condition,
|  | u32 | mask
| ) |  |

Definition at line 442 of file irrMath.h.

REALINLINE f32 irr::core::squareroot | ( | const f32 | f | ) |

Definition at line 471 of file irrMath.h.

Referenced by irr::core::vector2d< f32 >::getAngle(), irr::core::vector2d< f32 >::getAngleWith(), irr::core::vector3d< f32 >::getHorizontalAngle(), irr::core::line3d< T >::getIntersectionWithSphere(), irr::core::vector2d< f32 >::getLength(), irr::core::vector3d< f32 >::getLength(), and squareroot().

REALINLINE f64 irr::core::squareroot | ( | const f64 | f | ) |

Definition at line 477 of file irrMath.h.

REALINLINE s32 irr::core::squareroot | ( | const s32 | f | ) |

Definition at line 483 of file irrMath.h.

References squareroot().

REALINLINE s64 irr::core::squareroot | ( | const s64 | f | ) |

Definition at line 490 of file irrMath.h.

References squareroot().

f32 irr::core::strtof10 | ( | const char * | in,
|  | const char ** | out = `0`
| ) |  | `[inline]`

Converts a sequence of digits into a whole positive floating point value.

Only digits 0 to 9 are parsed. Parsing stops at any other character, including sign characters or a decimal point.

Parameters:

  in,: | the sequence of digits to convert.
  out,: | (optional) will be set to point at the first non-converted character.

Returns:
  The whole positive floating point representation of the digit sequence.

Definition at line 259 of file fast_atof.h.

References FLT_MAX.

Referenced by fast_atof_move().

s32 irr::core::strtol10 | ( | const char * | in,
|  | const char ** | out = `0`
| ) |  | `[inline]`

Convert a simple string of base 10 digits into a signed 32 bit integer.

Parameters:

  [in] | in,: | The string of digits to convert. Only a leading - or + followed by digits 0 to 9 will be considered. Parsing stops at the first non-digit.
  [out] | out,: | (optional) If provided, it will be set to point at the first character not used in the calculation.

Returns:
  The signed integer value of the digits. If the string specifies too many digits to encode in an s32 then +INT_MAX or -INT_MAX will be returned.

Definition at line 90 of file fast_atof.h.

References strtoul10().

Referenced by fast_atof_move().

u32 irr::core::strtoul10 | ( | const char * | in,
|  | const char ** | out = `0`
| ) |  | `[inline]`

Convert a simple string of base 10 digits into an unsigned 32 bit integer.

Parameters:

  [in] | in,: | The string of digits to convert. No leading chars are allowed, only digits 0 to 9. Parsing stops at the first non-digit.
  [out] | out,: | (optional) If provided, it will be set to point at the first character not used in the calculation.

Returns:
  The unsigned integer value of the digits. If the string specifies too many digits to encode in an u32 then INT_MAX will be returned.

Definition at line 50 of file fast_atof.h.

Referenced by strtol10(), and strtoul_prefix().

u32 irr::core::strtoul16 | ( | const char * | in,
|  | const char ** | out = `0`
| ) |  | `[inline]`

Convert a simple string of base 16 digits into an unsigned 32 bit integer.

Parameters:

  [in] | in,: | The string of digits to convert. No leading chars are allowed, only digits 0 to 9 and chars A-F,a-f are allowed. Parsing stops at the first illegal char.
  [out] | out,: | (optional) If provided, it will be set to point at the first character not used in the calculation.

Returns:
  The unsigned integer value of the digits. If the string specifies too many digits to encode in an u32 then INT_MAX will be returned.

Definition at line 147 of file fast_atof.h.

Referenced by strtoul_prefix().

u32 irr::core::strtoul8 | ( | const char * | in,
|  | const char ** | out = `0`
| ) |  | `[inline]`

Convert a simple string of base 8 digits into an unsigned 32 bit integer.

Parameters:

  [in] | in | The string of digits to convert. No leading chars are allowed, only digits 0 to 7 are allowed. Parsing stops at the first illegal char.
  [out] | out | (optional) If provided, it will be set to point at the first character not used in the calculation.

Returns:
  The unsigned integer value of the digits. If the string specifies too many digits to encode in an u32 then INT_MAX will be returned.

Definition at line 194 of file fast_atof.h.

Referenced by strtoul_prefix().

u32 irr::core::strtoul_prefix | ( | const char * | in,
|  | const char ** | out = `0`
| ) |  | `[inline]`

Convert a C-style prefixed string (hex, oct, integer) into an unsigned 32 bit integer.

Parameters:

  [in] | in | The string of digits to convert. If string starts with 0x the hex parser is used, if only leading 0 is used, oct parser is used. In all other cases, the usual unsigned parser is used.
  [out] | out | (optional) If provided, it will be set to point at the first character not used in the calculation.

Returns:
  The unsigned integer value of the digits. If the string specifies too many digits to encode in an u32 then INT_MAX will be returned.

Definition at line 237 of file fast_atof.h.

References strtoul10(), strtoul16(), and strtoul8().

template<class T1 , class T2 >

void irr::core::swap | ( | T1 & | a,
|  | T2 & | b
| ) |  | `[inline]`

swaps the content of the passed parameters

Definition at line 177 of file irrMath.h.

## Variable Documentation

const f32 irr::core::DEGTORAD = PI / 180.0f

32bit Constant for converting from degrees to radians

Definition at line 74 of file irrMath.h.

Referenced by degToRad(), irr::core::CMatrix4< T >::setInverseRotationDegrees(), and irr::core::CMatrix4< T >::setRotationDegrees().

const f64 irr::core::DEGTORAD64 = PI64 / 180.0

64bit constant for converting from degrees to radians (formally known as GRAD_PI2)

Definition at line 80 of file irrMath.h.

Referenced by degToRad(), irr::core::vector2d< f32 >::rotateBy(), irr::core::vector3d< f32 >::rotateXYBy(), irr::core::vector3d< f32 >::rotateXZBy(), irr::core::vector3d< f32 >::rotateYZBy(), and irr::core::vector3d< f32 >::rotationToDirection().

const float irr::core::fast_atof_table[17]

Initial value:

     {
        0.f,
        0.1f,
        0.01f,
        0.001f,
        0.0001f,
        0.00001f,
        0.000001f,
        0.0000001f,
        0.00000001f,
        0.000000001f,
        0.0000000001f,
        0.00000000001f,
        0.000000000001f,
        0.0000000000001f,
        0.00000000000001f,
        0.000000000000001f,
        0.0000000000000001f
    }

Definition at line 22 of file fast_atof.h.

Referenced by fast_atof_move().

const f32 irr::core::HALF_PI = PI/2.0f

Constant for half of PI.

Definition at line 62 of file irrMath.h.

IRRLICHT_API const matrix4 irr::core::IdentityMatrix

global const identity matrix

Referenced by irr::video::SMaterialLayer::getTextureMatrix(), and irr::video::SMaterial::getTextureMatrix().

IRRLICHT_API irr::core::stringc irr::core::LOCALE_DECIMAL_POINTS

Selection of characters which count as decimal point in fast_atof.

Referenced by fast_atof_move().

const f32 irr::core::PI = 3.14159265359f

Constant for PI.

Definition at line 56 of file irrMath.h.

Referenced by irr::scene::quake3::SModifierFunction::evaluate(), and irr::scene::quake3::getMD3Normal().

const f64 irr::core::PI64 = 3.1415926535897932384626433832795028841971693993751

Constant for 64bit PI.

Definition at line 68 of file irrMath.h.

Referenced by irr::core::quaternion::toEuler().

const f32 irr::core::RADTODEG = 180.0f / PI

32bit constant for converting from radians to degrees (formally known as GRAD_PI)

Definition at line 77 of file irrMath.h.

Referenced by radToDeg().

const f64 irr::core::RADTODEG64 = 180.0 / PI64

64bit constant for converting from radians to degrees

Definition at line 83 of file irrMath.h.

Referenced by irr::core::vector2d< f32 >::getAngle(), irr::core::vector2d< f32 >::getAngleTrig(), irr::core::vector2d< f32 >::getAngleWith(), irr::core::vector3d< f32 >::getHorizontalAngle(), irr::core::CMatrix4< T >::getRotationDegrees(), irr::core::vector3d< f32 >::getSphericalCoordinateAngles(), irr::core::vector3d< T >::getSphericalCoordinateAngles(), and radToDeg().

const f32 irr::core::RECIPROCAL_PI = 1.0f/PI

Constant for reciprocal of PI.

Definition at line 59 of file irrMath.h.

const f64 irr::core::RECIPROCAL_PI64 = 1.0/PI64

Constant for 64bit reciprocal of PI.

Definition at line 71 of file irrMath.h.

const f32 irr::core::ROUNDING_ERROR_f32 = 0.000001f

Definition at line 49 of file irrMath.h.

Referenced by irr::core::plane3d< f32 >::classifyPointRelation(), irr::core::plane3d< f32 >::existsIntersection(), and irr::core::triangle3d< T >::isPointInsideFast().

const f64 irr::core::ROUNDING_ERROR_f64 = 0.00000001

Definition at line 50 of file irrMath.h.

Referenced by irr::core::plane3d< f32 >::getIntersectionWithPlane().

const s32 irr::core::ROUNDING_ERROR_S32 = 0

Rounding error constant often used when comparing f32 values.

Definition at line 45 of file irrMath.h.

const s64 irr::core::ROUNDING_ERROR_S64 = 0

Definition at line 47 of file irrMath.h.