#include <OgreMath.h>
Public Types | |
enum | AngleUnit { AU_DEGREE, AU_RADIAN } |
The angular units used by the API. More... | |
Public Member Functions | |
Math (unsigned int trigTableSize=4096) | |
Default constructor. | |
~Math () | |
Default destructor. | |
Static Public Member Functions | |
static int | IAbs (int iValue) |
static int | ICeil (float fValue) |
static int | IFloor (float fValue) |
static int | ISign (int iValue) |
static Real | Abs (Real fValue) |
static Degree | Abs (const Degree &dValue) |
static Radian | Abs (const Radian &rValue) |
static Radian | ACos (Real fValue) |
static Radian | ASin (Real fValue) |
static Radian | ATan (Real fValue) |
static Radian | ATan2 (Real fY, Real fX) |
static Real | Ceil (Real fValue) |
static Real | Cos (const Radian &fValue, bool useTables=false) |
Cosine function. | |
static Real | Cos (Real fValue, bool useTables=false) |
Cosine function. | |
static Real | Exp (Real fValue) |
static Real | Floor (Real fValue) |
static Real | Log (Real fValue) |
static Real | Pow (Real fBase, Real fExponent) |
static Real | Sign (Real fValue) |
static Radian | Sign (const Radian &rValue) |
static Degree | Sign (const Degree &dValue) |
static Real | Sin (const Radian &fValue, bool useTables=false) |
Sine function. | |
static Real | Sin (Real fValue, bool useTables=false) |
Sine function. | |
static Real | Sqr (Real fValue) |
static Real | Sqrt (Real fValue) |
static Radian | Sqrt (const Radian &fValue) |
static Degree | Sqrt (const Degree &fValue) |
static Real | InvSqrt (Real fValue) |
Inverse square root i.e. | |
static Real | UnitRandom () |
static Real | RangeRandom (Real fLow, Real fHigh) |
static Real | SymmetricRandom () |
static Real | Tan (const Radian &fValue, bool useTables=false) |
Tangent function. | |
static Real | Tan (Real fValue, bool useTables=false) |
Tangent function. | |
static Real | DegreesToRadians (Real degrees) |
static Real | RadiansToDegrees (Real radians) |
static void | setAngleUnit (AngleUnit unit) |
These functions used to set the assumed angle units (radians or degrees) expected when using the Angle type. | |
static AngleUnit | getAngleUnit (void) |
Get the unit being used for angles. | |
static Real | AngleUnitsToRadians (Real units) |
Convert from the current AngleUnit to radians. | |
static Real | RadiansToAngleUnits (Real radians) |
Convert from radians to the current AngleUnit . | |
static Real | AngleUnitsToDegrees (Real units) |
Convert from the current AngleUnit to degrees. | |
static Real | DegreesToAngleUnits (Real degrees) |
Convert from degrees to the current AngleUnit. | |
static bool | pointInTri2D (const Vector2 &p, const Vector2 &a, const Vector2 &b, const Vector2 &c) |
Checks whether a given point is inside a triangle, in a 2-dimensional (Cartesian) space. | |
static bool | pointInTri3D (const Vector3 &p, const Vector3 &a, const Vector3 &b, const Vector3 &c, const Vector3 &normal) |
Checks whether a given 3D point is inside a triangle. | |
static std::pair < bool, Real > | intersects (const Ray &ray, const Plane &plane) |
Ray / plane intersection, returns boolean result and distance. | |
static std::pair < bool, Real > | intersects (const Ray &ray, const Sphere &sphere, bool discardInside=true) |
Ray / sphere intersection, returns boolean result and distance. | |
static std::pair < bool, Real > | intersects (const Ray &ray, const AxisAlignedBox &box) |
Ray / box intersection, returns boolean result and distance. | |
static bool | intersects (const Ray &ray, const AxisAlignedBox &box, Real *d1, Real *d2) |
Ray / box intersection, returns boolean result and two intersection distance. | |
static std::pair < bool, Real > | intersects (const Ray &ray, const Vector3 &a, const Vector3 &b, const Vector3 &c, const Vector3 &normal, bool positiveSide=true, bool negativeSide=true) |
Ray / triangle intersection, returns boolean result and distance. | |
static std::pair < bool, Real > | intersects (const Ray &ray, const Vector3 &a, const Vector3 &b, const Vector3 &c, bool positiveSide=true, bool negativeSide=true) |
Ray / triangle intersection, returns boolean result and distance. | |
static bool | intersects (const Sphere &sphere, const AxisAlignedBox &box) |
Sphere / box intersection test. | |
static bool | intersects (const Plane &plane, const AxisAlignedBox &box) |
Plane / box intersection test. | |
static std::pair < bool, Real > | intersects (const Ray &ray, const std::vector< Plane > &planeList, bool normalIsOutside) |
Ray / convex plane list intersection test. | |
static std::pair < bool, Real > | intersects (const Ray &ray, const std::list< Plane > &planeList, bool normalIsOutside) |
Ray / convex plane list intersection test. | |
static bool | intersects (const Sphere &sphere, const Plane &plane) |
Sphere / plane intersection test. | |
static bool | RealEqual (Real a, Real b, Real tolerance=std::numeric_limits< Real >::epsilon()) |
Compare 2 reals, using tolerance for inaccuracies. | |
static Vector3 | calculateTangentSpaceVector (const Vector3 &position1, const Vector3 &position2, const Vector3 &position3, Real u1, Real v1, Real u2, Real v2, Real u3, Real v3) |
Calculates the tangent space vector for a given set of positions / texture coords. | |
static Matrix4 | buildReflectionMatrix (const Plane &p) |
Build a reflection matrix for the passed in plane. | |
static Vector4 | calculateFaceNormal (const Vector3 &v1, const Vector3 &v2, const Vector3 &v3) |
Calculate a face normal, including the w component which is the offset from the origin. | |
static Vector3 | calculateBasicFaceNormal (const Vector3 &v1, const Vector3 &v2, const Vector3 &v3) |
Calculate a face normal, no w-information. | |
static Vector4 | calculateFaceNormalWithoutNormalize (const Vector3 &v1, const Vector3 &v2, const Vector3 &v3) |
Calculate a face normal without normalize, including the w component which is the offset from the origin. | |
static Vector3 | calculateBasicFaceNormalWithoutNormalize (const Vector3 &v1, const Vector3 &v2, const Vector3 &v3) |
Calculate a face normal without normalize, no w-information. | |
static Real | gaussianDistribution (Real x, Real offset=0.0f, Real scale=1.0f) |
Generates a value based on the Gaussian (normal) distribution function with the given offset and scale parameters. | |
template<typename T> | |
static T | Clamp (T val, T minval, T maxval) |
Clamp a value within an inclusive range. | |
static Matrix4 | makeViewMatrix (const Vector3 &position, const Quaternion &orientation, const Matrix4 *reflectMatrix=0) |
Static Public Attributes | |
static const Real | POS_INFINITY |
static const Real | NEG_INFINITY |
static const Real | PI |
static const Real | TWO_PI |
static const Real | HALF_PI |
static const Real | fDeg2Rad |
static const Real | fRad2Deg |
Protected Member Functions | |
void | buildTrigTables () |
Private function to build trig tables. | |
Static Protected Member Functions | |
static Real | SinTable (Real fValue) |
static Real | TanTable (Real fValue) |
Static Protected Attributes | |
static AngleUnit | msAngleUnit |
static int | mTrigTableSize |
Size of the trig tables as determined by constructor. | |
static Real | mTrigTableFactor |
Radian -> index factor value ( mTrigTableSize / 2 * PI ). | |
static Real * | mSinTable |
static Real * | mTanTable |
Definition at line 171 of file OgreMath.h.
The angular units used by the API.
This functionality is now deprecated in favor of discreet angular unit types ( see Degree and Radian above ). The only place this functionality is actually still used is when parsing files. Search for usage of the Angle class for those instances
Definition at line 179 of file OgreMath.h.
Ogre::Math::Math | ( | unsigned int | trigTableSize = 4096 |
) |
Default constructor.
trigTableSize | Optional parameter to set the size of the tables used to implement Sin, Cos, Tan |
Ogre::Math::~Math | ( | ) |
Default destructor.
void Ogre::Math::buildTrigTables | ( | ) | [protected] |
Private function to build trig tables.
static int Ogre::Math::IAbs | ( | int | iValue | ) | [static] |
Definition at line 215 of file OgreMath.h.
static int Ogre::Math::ICeil | ( | float | fValue | ) | [static] |
Definition at line 216 of file OgreMath.h.
static int Ogre::Math::IFloor | ( | float | fValue | ) | [static] |
Definition at line 217 of file OgreMath.h.
static int Ogre::Math::ISign | ( | int | iValue | ) | [static] |
Definition at line 220 of file OgreMath.h.
Referenced by Ogre::Vector3::absDotProduct(), Ogre::Vector3::directionEquals(), and Ogre::AxisAlignedBox::transformAffine().
Definition at line 222 of file OgreMath.h.
References Ogre::Radian::Radian(), and Ogre::Radian::valueRadians().
Referenced by Ogre::Vector3::angleBetween(), and Ogre::Vector3::directionEquals().
Definition at line 227 of file OgreMath.h.
Cosine function.
fValue | Angle in radians | |
useTables | If true, uses lookup tables rather than calculation - faster but less accurate. |
Definition at line 236 of file OgreMath.h.
References Ogre::Radian::valueRadians().
Cosine function.
fValue | Angle in radians | |
useTables | If true, uses lookup tables rather than calculation - faster but less accurate. |
Definition at line 246 of file OgreMath.h.
Definition at line 250 of file OgreMath.h.
Definition at line 252 of file OgreMath.h.
Definition at line 254 of file OgreMath.h.
Definition at line 256 of file OgreMath.h.
Definition at line 259 of file OgreMath.h.
References Ogre::Radian::Radian(), and Ogre::Radian::valueRadians().
Sine function.
fValue | Angle in radians | |
useTables | If true, uses lookup tables rather than calculation - faster but less accurate. |
Definition at line 275 of file OgreMath.h.
References Ogre::Radian::valueRadians().
Sine function.
fValue | Angle in radians | |
useTables | If true, uses lookup tables rather than calculation - faster but less accurate. |
Definition at line 285 of file OgreMath.h.
Definition at line 291 of file OgreMath.h.
Referenced by Ogre::Vector3::getRotationTo(), Ogre::Vector3::length(), Ogre::Vector2::length(), Ogre::Vector3::normalise(), and Ogre::Vector2::normalise().
Definition at line 293 of file OgreMath.h.
References Ogre::Radian::Radian(), and Ogre::Radian::valueRadians().
Inverse square root i.e.
1 / Sqrt(x), good for vector normalisation.
static Real Ogre::Math::UnitRandom | ( | ) | [static] |
Referenced by Ogre::Vector3::randomDeviant(), and Ogre::Vector2::randomDeviant().
static Real Ogre::Math::SymmetricRandom | ( | ) | [static] |
Tangent function.
fValue | Angle in radians | |
useTables | If true, uses lookup tables rather than calculation - faster but less accurate. |
Definition at line 315 of file OgreMath.h.
References Ogre::Radian::valueRadians().
Tangent function.
fValue | Angle in radians | |
useTables | If true, uses lookup tables rather than calculation - faster but less accurate. |
Definition at line 325 of file OgreMath.h.
static void Ogre::Math::setAngleUnit | ( | AngleUnit | unit | ) | [static] |
static AngleUnit Ogre::Math::getAngleUnit | ( | void | ) | [static] |
Get the unit being used for angles.
static bool Ogre::Math::pointInTri2D | ( | const Vector2 & | p, | |
const Vector2 & | a, | |||
const Vector2 & | b, | |||
const Vector2 & | c | |||
) | [static] |
Checks whether a given point is inside a triangle, in a 2-dimensional (Cartesian) space.
p | The point. | |
a | The triangle's first vertex. | |
b | The triangle's second vertex. | |
c | The triangle's third vertex. |
static bool Ogre::Math::pointInTri3D | ( | const Vector3 & | p, | |
const Vector3 & | a, | |||
const Vector3 & | b, | |||
const Vector3 & | c, | |||
const Vector3 & | normal | |||
) | [static] |
Checks whether a given 3D point is inside a triangle.
p | The point. | |
a | The triangle's first vertex. | |
b | The triangle's second vertex. | |
c | The triangle's third vertex. | |
normal | The triangle plane's normal (passed in rather than calculated on demand since the caller may already have it) |
static std::pair<bool, Real> Ogre::Math::intersects | ( | const Ray & | ray, | |
const Plane & | plane | |||
) | [static] |
Ray / plane intersection, returns boolean result and distance.
Referenced by Ogre::Sphere::intersects(), Ogre::Ray::intersects(), Ogre::PlaneBoundedVolume::intersects(), and Ogre::AxisAlignedBox::intersects().
static std::pair<bool, Real> Ogre::Math::intersects | ( | const Ray & | ray, | |
const Sphere & | sphere, | |||
bool | discardInside = true | |||
) | [static] |
Ray / sphere intersection, returns boolean result and distance.
static std::pair<bool, Real> Ogre::Math::intersects | ( | const Ray & | ray, | |
const AxisAlignedBox & | box | |||
) | [static] |
Ray / box intersection, returns boolean result and distance.
static bool Ogre::Math::intersects | ( | const Ray & | ray, | |
const AxisAlignedBox & | box, | |||
Real * | d1, | |||
Real * | d2 | |||
) | [static] |
Ray / box intersection, returns boolean result and two intersection distance.
ray | The ray. | |
box | The box. | |
d1 | A real pointer to retrieve the near intersection distance from the ray origin, maybe null which means don't care about the near intersection distance. | |
d2 | A real pointer to retrieve the far intersection distance from the ray origin, maybe null which means don't care about the far intersection distance. |
static std::pair<bool, Real> Ogre::Math::intersects | ( | const Ray & | ray, | |
const Vector3 & | a, | |||
const Vector3 & | b, | |||
const Vector3 & | c, | |||
const Vector3 & | normal, | |||
bool | positiveSide = true , |
|||
bool | negativeSide = true | |||
) | [static] |
Ray / triangle intersection, returns boolean result and distance.
ray | The ray. | |
a | The triangle's first vertex. | |
b | The triangle's second vertex. | |
c | The triangle's third vertex. | |
normal | The triangle plane's normal (passed in rather than calculated on demand since the caller may already have it), doesn't need normalised since we don't care. | |
positiveSide | Intersect with "positive side" of the triangle | |
negativeSide | Intersect with "negative side" of the triangle |
static std::pair<bool, Real> Ogre::Math::intersects | ( | const Ray & | ray, | |
const Vector3 & | a, | |||
const Vector3 & | b, | |||
const Vector3 & | c, | |||
bool | positiveSide = true , |
|||
bool | negativeSide = true | |||
) | [static] |
Ray / triangle intersection, returns boolean result and distance.
ray | The ray. | |
a | The triangle's first vertex. | |
b | The triangle's second vertex. | |
c | The triangle's third vertex. | |
positiveSide | Intersect with "positive side" of the triangle | |
negativeSide | Intersect with "negative side" of the triangle |
static bool Ogre::Math::intersects | ( | const Sphere & | sphere, | |
const AxisAlignedBox & | box | |||
) | [static] |
Sphere / box intersection test.
static bool Ogre::Math::intersects | ( | const Plane & | plane, | |
const AxisAlignedBox & | box | |||
) | [static] |
Plane / box intersection test.
static std::pair<bool, Real> Ogre::Math::intersects | ( | const Ray & | ray, | |
const std::vector< Plane > & | planeList, | |||
bool | normalIsOutside | |||
) | [static] |
Ray / convex plane list intersection test.
ray | The ray to test with | |
plaeList | List of planes which form a convex volume | |
normalIsOutside | Does the normal point outside the volume |
static std::pair<bool, Real> Ogre::Math::intersects | ( | const Ray & | ray, | |
const std::list< Plane > & | planeList, | |||
bool | normalIsOutside | |||
) | [static] |
Ray / convex plane list intersection test.
ray | The ray to test with | |
plaeList | List of planes which form a convex volume | |
normalIsOutside | Does the normal point outside the volume |
Sphere / plane intersection test.
static bool Ogre::Math::RealEqual | ( | Real | a, | |
Real | b, | |||
Real | tolerance = std::numeric_limits< Real >::epsilon() | |||
) | [static] |
Compare 2 reals, using tolerance for inaccuracies.
Referenced by Ogre::Matrix4::hasScale(), Ogre::Matrix3::hasScale(), Ogre::QueuedRenderableCollection::DepthSortDescendingLess::operator()(), and Ogre::Vector3::positionEquals().
static Vector3 Ogre::Math::calculateTangentSpaceVector | ( | const Vector3 & | position1, | |
const Vector3 & | position2, | |||
const Vector3 & | position3, | |||
Real | u1, | |||
Real | v1, | |||
Real | u2, | |||
Real | v2, | |||
Real | u3, | |||
Real | v3 | |||
) | [static] |
Calculates the tangent space vector for a given set of positions / texture coords.
Build a reflection matrix for the passed in plane.
static Vector4 Ogre::Math::calculateFaceNormal | ( | const Vector3 & | v1, | |
const Vector3 & | v2, | |||
const Vector3 & | v3 | |||
) | [static] |
Calculate a face normal, including the w component which is the offset from the origin.
static Vector3 Ogre::Math::calculateBasicFaceNormal | ( | const Vector3 & | v1, | |
const Vector3 & | v2, | |||
const Vector3 & | v3 | |||
) | [static] |
Calculate a face normal, no w-information.
static Vector4 Ogre::Math::calculateFaceNormalWithoutNormalize | ( | const Vector3 & | v1, | |
const Vector3 & | v2, | |||
const Vector3 & | v3 | |||
) | [static] |
Calculate a face normal without normalize, including the w component which is the offset from the origin.
static Vector3 Ogre::Math::calculateBasicFaceNormalWithoutNormalize | ( | const Vector3 & | v1, | |
const Vector3 & | v2, | |||
const Vector3 & | v3 | |||
) | [static] |
Calculate a face normal without normalize, no w-information.
static Real Ogre::Math::gaussianDistribution | ( | Real | x, | |
Real | offset = 0.0f , |
|||
Real | scale = 1.0f | |||
) | [static] |
Generates a value based on the Gaussian (normal) distribution function with the given offset and scale parameters.
static T Ogre::Math::Clamp | ( | T | val, | |
T | minval, | |||
T | maxval | |||
) | [static] |
Clamp a value within an inclusive range.
Definition at line 544 of file OgreMath.h.
Referenced by Ogre::Vector3::angleBetween().
static Matrix4 Ogre::Math::makeViewMatrix | ( | const Vector3 & | position, | |
const Quaternion & | orientation, | |||
const Matrix4 * | reflectMatrix = 0 | |||
) | [static] |
AngleUnit Ogre::Math::msAngleUnit [static, protected] |
Definition at line 187 of file OgreMath.h.
int Ogre::Math::mTrigTableSize [static, protected] |
Real Ogre::Math::mTrigTableFactor [static, protected] |
Radian -> index factor value ( mTrigTableSize / 2 * PI ).
Definition at line 193 of file OgreMath.h.
Real* Ogre::Math::mSinTable [static, protected] |
Definition at line 194 of file OgreMath.h.
Real* Ogre::Math::mTanTable [static, protected] |
Definition at line 195 of file OgreMath.h.
const Real Ogre::Math::POS_INFINITY [static] |
Definition at line 555 of file OgreMath.h.
Referenced by Ogre::MovablePlane::getBoundingRadius(), Ogre::AxisAlignedBox::getHalfSize(), Ogre::AxisAlignedBox::getSize(), and Ogre::AxisAlignedBox::volume().
const Real Ogre::Math::NEG_INFINITY [static] |
Definition at line 556 of file OgreMath.h.
const Real Ogre::Math::PI [static] |
const Real Ogre::Math::TWO_PI [static] |
Definition at line 558 of file OgreMath.h.
Referenced by Ogre::Vector3::randomDeviant(), and Ogre::Vector2::randomDeviant().
const Real Ogre::Math::HALF_PI [static] |
Definition at line 559 of file OgreMath.h.
const Real Ogre::Math::fDeg2Rad [static] |
Definition at line 560 of file OgreMath.h.
const Real Ogre::Math::fRad2Deg [static] |
Definition at line 561 of file OgreMath.h.
Copyright © 2008 Torus Knot Software Ltd
This work is licensed under a Creative Commons Attribution-ShareAlike 2.5 License.
Last modified Thu Aug 28 20:56:53 2008