Classes

Functions

Typedefs

Variables

Geo::s32 Geo::BloatTriangle

public: Geo::s32 BloatTriangle
(
    ConvexHull * out,
    Geo::v128 a,
    Geo::v128 b,
    Geo::v128 c,
    float bloat,
    Geo::s32 cornerSmoothness
)

Bloat a triangle by a specified amount.

You can specify how refined you want the rounded corners to be, or 0 if you just want a single join point in the centre. The number correlates to how many segments the widest corner will have (and will scale from there). As this is a reasonably quick function, you should pass in a convex hull with the appropriate number of points allocated to it.

Returns

The number of points used, or -1 if there wasn't enough space.

void GEO_CALL Geo::CalcCubeMapCoordinatesForDirection

public: void GEO_CALL CalcCubeMapCoordinatesForDirection
(
    Geo::v128 direction,
    Geo::s32 faceWidth,
    Geo::s32 & faceIdx,
    float & x,
    float & y
)

Compute the cube map texel coordinate for a given direction and cubemap resolution.

Geo::v128 GEO_CALL Geo::CalcDirectionForCubeMapCoordinate

public: Geo::v128GEO_CALL CalcDirectionForCubeMapCoordinate
(
    Geo::s32 faceIdx,
    Geo::s32 x,
    Geo::s32 y,
    Geo::s32 faceWidth
)

Generate a direction vector for a cubemap texel coordinate.

Geo::v128 GEO_CALL Geo::CalcDirectionForCubeMapTexel

public: Geo::v128GEO_CALL CalcDirectionForCubeMapTexel
(
    Geo::s32 faceIdx,
    float u,
    float v
)

Generate a direction vector for a cubemap texel UV coordinate.

Geo::v128 Geo::GeoBoundingBox::ClosestPointInBox

public: Geo::v128 ClosestPointInBox
(
    const Geo::v128 & p
) const

Compute the closest point in the box to p.

Statistics GEO_CALL Geo::CombineStatistics

public: Statistics GEO_CALL CombineStatistics
(
    const Statistics & statsA,
    const Statistics & statsB
)

Combine the values in statsA and statsB so that the properties of each member are retained over the whole set.

bool GEO_CALL Geo::ComputeStatistics

public: bool GEO_CALL ComputeStatistics
(
    Statistics & stats,
    const Geo::v128 * vA,
    const Geo::v128 * vB,
    const Geo::s32 numValues,
    const Geo::v128 & mask
)

Computes the difference between two vector arrays.

Returns TRUE on success. Vector array parameters must be valid non-null objects.

Parameters

bool Geo::GeoBoundingBox::ContainsBox

public: bool ContainsBox
(
    const Geo::GeoBoundingBox & rhs
) const

Is a box contained by the box?

bool Geo::GeoBoundingBox::ContainsPoint

public: bool ContainsPoint
(
    const Geo::v128 & p
) const

Is a point in the box?

bool Geo::GeoBoundingBox::ContainsPoint2D

public: bool ContainsPoint2D
(
    const Geo::v128 & p
) const

Is a point in the box? Only tests xy.

VectorD Geo::Cross

public: VectorD Cross
(
    VectorD u,
    VectorD v
)

Double precision vector operators.

double Geo::Dot

public: double Dot
(
    VectorD lhs,
    VectorD rhs
)

Double precision vector operators.

void Geo::GeoBoundingBox::EnclosePoint

public: void EnclosePoint
(
    const v128 & point
)

Enlarge this bounding box to include the given point.

void Geo::GeoBoundingBox::ExpandBy

public: void ExpandBy
(
    const v128 & expansion
)

Expands this bounding box by the given amount in each of the three axes (in both directions).

bool Geo::GenerateGuidFromString

public: bool GenerateGuidFromString
(
    GeoGuid & guidFromString,
    const GeoString< char > & string
)

Convert a string to a GUID by hashing.

GeoGuid Geo::GenerateGuidFromString

public: GeoGuid GenerateGuidFromString
(
    const GeoString< char > & string
)

Convert a string to a GUID by hashing.

bool GEO_CALL Geo::GenerateUnitSquareFastPoissonDistribution

public: bool GEO_CALL GenerateUnitSquareFastPoissonDistribution
(
    const s32 & numSamples,
    GeoArray< GeoPoint2 > & samples,
    const u32 & seed
)

Helper function to generate fast poisson samples in the 2D unit square.

bool GEO_CALL Geo::GenerateUnitSquareSobolDistribution

public: bool GEO_CALL GenerateUnitSquareSobolDistribution
(
    const s32 & numSamples,
    GeoArray< GeoPoint2 > & samples,
    const u32 & seed
)

Helper function to generate sobol samples in the 2D unit square.

Geo::GeoBoundingBox::GeoBoundingBox

public: GeoBoundingBox
(
    float x1,
    float y1,
    float z1,
    float x2,
    float y2,
    float z2
)

Create a bounding box defined by two extreme points.

Geo::GeoBoundingBox::GeoBoundingBox

public: GeoBoundingBox
(
    const GeoBoundingBox & from
)

Copy Constructor.

Geo::GeoBoundingBox::GeoBoundingBox

public: GeoBoundingBox()

Constructor - makes an empty bounding box.

GeoRect Geo::GeoRectFromCoords

public: GeoRect GeoRectFromCoords
(
    float minX,
    float minY,
    float maxX,
    float maxY
)

Function to construct a GeoRect from the minimum and maximum X and Y co-ordinates.

GeoRect Geo::GeoRectFromCoordsUnsafe

public: GeoRect GeoRectFromCoordsUnsafe
(
    float minX,
    float minY,
    float maxX,
    float maxY
)

Function to construct a GeoRect from the minimum and maximum X and Y co-ordinates.

GeoRect Geo::GeoRectFromSize

public: GeoRect GeoRectFromSize
(
    float minX,
    float minY,
    float width,
    float height
)

Function to construct a GeoRect from a minimum X and Y co-ordinate, a width and a height.

float Geo::GeoRectHeight

public: float GeoRectHeight
(
    GeoRect rect
)

Functions to get various co-ordinates from a rect.

float Geo::GeoRectMaxX

public: float GeoRectMaxX
(
    GeoRect rect
)

Functions to get various co-ordinates from a rect.

float Geo::GeoRectMaxY

public: float GeoRectMaxY
(
    GeoRect rect
)

Functions to get various co-ordinates from a rect.

float Geo::GeoRectMinX

public: float GeoRectMinX
(
    GeoRect rect
)

Functions to get various co-ordinates from a rect.

float Geo::GeoRectMinY

public: float GeoRectMinY
(
    GeoRect rect
)

Functions to get various co-ordinates from a rect.

float Geo::GeoRectWidth

public: float GeoRectWidth
(
    GeoRect rect
)

Functions to get various co-ordinates from a rect.

v128 Geo::GeoBoundingBox::GetCenter

public: v128 GetCenter() const

Return the center of this bounding box.

float Geo::GeoBoundingBox::GetDistanceFrom

public: float GetDistanceFrom
(
    const GeoBoundingBox & rhs
) const

Distance between two bounding boxes (0 if they intersect)

float Geo::GeoBoundingBox::GetLargestFace

public: float GetLargestFace() const

Return the largest face of this bounding box.

float Geo::GeoBoundingBox::GetLongestSide

public: float GetLongestSide() const

Return the longest side of this bounding box.

v128 Geo::GeoBoundingBox::GetMax

public: v128 GetMax() const

Return the maxumum in each axis of this bounding box.

v128 Geo::GeoBoundingBox::GetMin

public: v128 GetMin() const

Return the minimum in each axis of this bounding box.

float Geo::GeoBoundingBox::GetShortestSide

public: float GetShortestSide() const

Return the shortest side of this bounding box.

v128 Geo::GeoBoundingBox::GetSize

public: v128 GetSize() const

Return the size of this bounding box in each axis.

float Geo::GeoBoundingBox::GetSurfaceArea

public: float GetSurfaceArea() const

Return the surface area of this bounding box.

float Geo::GeoBoundingBox::GetVolume

public: float GetVolume() const

Return the volume of this bounding box.

u32 Geo::HashBig

public: u32 HashBig
(
    const void * key,
    size_t length,
    u32 initval
)

This is the same as HashWord() on big-endian machines.

It is different from HashLittle() on all machines. HashBig() takes advantage of big-endian byte ordering.

u32 Geo::HashLittle

public: u32 HashLittle
(
    const GeoString< char > & string
)

This will create a simple u32 hash from the (case-sensitive) string supplied.

u32 Geo::HashLittle

public: u32 HashLittle
(
    const void * key,
    size_t length,
    u32 initval
)

Hash a variable-length key of bytes into a 32-bit value.

Every bit of the key affects every bit of the return value. Two keys differing by one or two bits will have totally different hash values.

The best hash table sizes are powers of 2. There is no need to do mod a prime (mod is sooo slow!). If you need less than 32 bits, use a bitmask. For example, if you need only 10 bits, do h = (h & hashmask(10)); In which case, the hash table should have hashsize(10) elements.

If you are hashing n strings (u8 **)k, do it like this: for (i=0, h=0; i<n; ++i) h = HashLittle( k[i], len[i], h);

By Bob Jenkins, 2006. bob_jenkins@burtleburtle.net. You may use this code any way you wish, private, educational, or commercial. It's free.

Use for hash table lookup, or anything where one collision in 2^^32 is acceptable. Do NOT use for cryptographic purposes.

Parameters

Returns

Returns a 32-bit value.

Geo::GeoString<char> Geo::HashSHA1

public: Geo::GeoString< char > HashSHA1
(
    const Geo::u8 * inputBytes,
    Geo::s32 inputNumBytes
)

Hashes the given array of bytes using SHA1 and returns a string representing the hash.

bool Geo::HashSHA1

public: bool HashSHA1
(
    const Geo::u8 * inputBytes,
    Geo::s32 inputNumBytes,
    Geo::u8 * outputBytes
)

Hashes the given array of bytes using SHA1. The outputBytes parameter must have at least HASH_SIZE_SHA1 bytes allocated.

u32 Geo::HashWord

public: u32 HashWord
(
    const u32 * k,
    size_t length,
    u32 initval
)

Produce a hash from a string of Geo::u32 This works on all machines.

To be useful, it requires

• That the key be an array of u32's, and

• That all your machines have the same endianness, and

• That the length be the number of u32's in the key The function HashWord() is identical to HashLittle() on little-endian machines, and identical to HashBig() on big-endian machines, except that the length has to be measured in u32s rather than in bytes. HashLittle() is more complicated than HashWord() only because HashLittle() has to dance around fitting the key bytes into registers.

bool Geo::GeoBoundingBox::IntersectsBoundingBox

public: bool IntersectsBoundingBox
(
    const GeoBoundingBox & rhs
) const

Returns true if the bounding boxes mutually olaps.

bool Geo::GeoBoundingBox::IsEmpty

public: bool IsEmpty() const

Returns true if the bbox is empty (ie uninitialised)

double Geo::Length

public: double Length
(
    VectorD v
)

Double precision vector operators.

GeoPoint2D Geo::Max

public: GeoPoint2D Max
(
    const GeoPoint2D & a,
    const GeoPoint2D & b
)

Gets the component-wise maximum of two points.

Matrix GEO_CALL Geo::MConstructCubeMapInvViewMatrix

public: Matrix GEO_CALL MConstructCubeMapInvViewMatrix
(
    Geo::s32 faceIdx
)

Construct the inverse of the view matrix for a specific cubemap face.

Matrix GEO_CALL Geo::MConstructCubeMapViewMatrix

public: Matrix GEO_CALL MConstructCubeMapViewMatrix
(
    Geo::s32 faceIdx
)

Construct a view matrix for a specific cubemap face.

VectorD Geo::operator-

public: VectorD operator-
(
    VectorD lhs,
    VectorD rhs
)

Double precision vector operators.

VectorD Geo::operator*

public: VectorD operator*
(
    double lhs,
    VectorD rhs
)

Double precision vector operators.

VectorD Geo::operator/

public: VectorD operator/
(
    VectorD lhs,
    VectorD rhs
)

Double precision vector operators.

const v128 & Geo::GeoBoundingBox::operator[]

public: const v128 & operator[]
(
    Geo::u32 index
) const

Indexed access to the two extreme points that define this bounding box (index must be 0 or 1).

GeoBoundingBox Geo::GeoBoundingBox::operator+

public: GeoBoundingBox operator+
(
    const GeoBoundingBox & rhs
) const

Compute and return the union of this bounding with another.

GeoBoundingBox & Geo::GeoBoundingBox::operator+=

public: GeoBoundingBox & operator+=
(
    const v128 & rhs
)

Enlarge this bounding box to include the given point.

GeoBoundingBox & Geo::GeoBoundingBox::operator+=

public: GeoBoundingBox & operator+=
(
    const GeoBoundingBox & rhs
)

Compute the inplace union of this bounding box and another.

bool Geo::operator<

public: bool operator<
(
    const GeoPoint3 & lhs,
    const GeoPoint3 & rhs
)

Allow GeoPoint3 to be used as a key for GeoMap.

Although this will not give any kind of sensible spatial organisation, it is at least a stable, usable ordering.

bool Geo::operator<

public: bool operator<
(
    const GeoPoint3D & lhs,
    const GeoPoint3D & rhs
)

Allow GeoPoint3D to be used as a key for GeoMap.

Although this will not give any kind of sensible spatial organisation, it is at least a stable, usable ordering.

bool Geo::operator==

public: bool operator==
(
    const GeoPoint3 & lhs,
    const GeoPoint3 & rhs
)

Equality operator.

GeoRect Geo::ScaleRect

public: GeoRect ScaleRect
(
    GeoRect rect,
    float scale
)

Function to scale a bounding box.

void Geo::GeoBoundingBox::SetEmpty

public: void SetEmpty()

Resets the box to it's default empty state.

bool GEO_CALL Geo::TestSamplingDistributions

public: bool GEO_CALL TestSamplingDistributions
(
    const char * filename,
    const s32 & numSamples
)

Write out raysets representing the ray distributions for debugging and visualisation.

u32 Geo::UniformInteger

public: u32 UniformInteger
(
    RNG & rng
)

Random unsigned 32 bit integer, [0, 0xffffffff] (inclusive)

double Geo::UniformSignedUnitDouble

public: double UniformSignedUnitDouble
(
    RNG & rng
)

Random double, [-1, 1] (inclusive)

float Geo::UniformSignedUnitFloat

public: float UniformSignedUnitFloat
(
    RNG & rng
)

Random float, [-1, 1] (inclusive)

double Geo::UniformUnitClopenDouble

public: double UniformUnitClopenDouble
(
    RNG & rng
)

Random double, [0, 1)

float Geo::UniformUnitClopenFloat

public: float UniformUnitClopenFloat
(
    RNG & rng
)

Random float, [0, 1)

double Geo::UniformUnitDouble

public: double UniformUnitDouble
(
    RNG & rng
)

Random double, [0, 1] (inclusive)

float Geo::UniformUnitFloat

public: float UniformUnitFloat
(
    RNG & rng
)

Random float, [0, 1] (inclusive)

double Geo::UniformUnitOpenDouble

public: double UniformUnitOpenDouble
(
    RNG & rng
)

Random double, (0, 1)

float Geo::UniformUnitOpenFloat

public: float UniformUnitOpenFloat
(
    RNG & rng
)

Random float, (0, 1)

GeoRect Geo::UnionOfRects

public: GeoRect UnionOfRects
(
    GeoRect r1,
    GeoRect r2
)

Union of two bounding boxes.

bool Geo::VLeftOf2

public: bool VLeftOf2
(
    const Geo::v128 & a,
    const Geo::v128 & b,
    const Geo::v128 & c
)

Determines if the point 'c' is to the left of the line formed by joining 'a' and 'b'.

VectorD Geo::VLength

public: VectorD VLength
(
    VectorD v
)

Double precision vector operators.

bool Geo::VRightOf2

public: bool VRightOf2
(
    const Geo::v128 & a,
    const Geo::v128 & b,
    const Geo::v128 & c
)

Determines if the point 'c' is to the right of the line formed by joining 'a' and 'b'.

Geo::v128 Geo::VScaleAndAdd

public: Geo::v128 VScaleAndAdd
(
    const Geo::v128 & a,
    float s,
    const Geo::v128 & b,
    float t
)

Calculates a * s + b * t.

float Geo::VSignedArea2

public: float VSignedArea2
(
    const Geo::v128 & a,
    const Geo::v128 & b,
    const Geo::v128 & c
)

Calculates the signed area of the given triangle in 2D space (z-coordinates ignored)

Geo::v128 Geo::VSlerp2

public: Geo::v128 VSlerp2
(
    const Geo::v128 & a,
    const Geo::v128 & b,
    float t
)

Spherical linear interpolation between 'a' and 'b', with weight 't'.