vec64

package

v0.0.0-...-e56f4fe Latest Latest Go to latest Published: Sep 30, 2014 License: MIT Imports: 2 Imported by: 15

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Repository

bitbucket.org/zombiezen/math3

Documentation ¶

Overview ¶

Package vec64 operates on four-dimensional float64 vectors.

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

func Dot ¶

func Dot(v1, v2 Vector) float64

Dot computes the dot product of two vectors.

Types ¶

type Vector ¶

type Vector [4]float64

Vector holds a four-dimensional vector. The default value is a zero vector.

func Add ¶

func Add(v1, v2 Vector) Vector

Add computes the sum of two vectors.

func CreateCS ¶

func CreateCS(normal Vector) (u, v Vector)

CreateCS finds two normalized vectors orthogonal to the given one that can be used as a coordinate system.

All calculations are done in three-dimensional space. This is particularly useful for UV-mapping and the like.

func Cross ¶

func Cross(v1, v2 Vector) Vector

Cross computes the three-dimensional cross product of two vectors.

func Mul ¶

func Mul(v1, v2 Vector) Vector

Mul multiplies the components of two vectors together.

func Reflect ¶

func Reflect(v, n Vector) Vector

Reflect calculates a reflection of a vector based on a normal.

func Sub ¶

func Sub(v1, v2 Vector) Vector

Sub computes the difference of two vectors.

func Sum ¶

func Sum(v1, v2 Vector, vn ...Vector) Vector

Sum computes the sum of two or more vectors.

func (Vector) Abs ¶

func (v Vector) Abs() Vector

Abs returns a new vector with all positive components.

func (Vector) GoString ¶

func (v Vector) GoString() string

func (Vector) Inverse ¶

func (v Vector) Inverse() Vector

Inverse returns a new vector that is the result of 1.0 / v[i] for all i. Any zero value is left as zero.

func (Vector) IsZero ¶

func (v Vector) IsZero() bool

IsZero indicates whether the vector is the zero vector.

func (Vector) Length ¶

func (v Vector) Length() float64

Length returns the magnitude of the vector.

func (Vector) LengthSqr ¶

func (v Vector) LengthSqr() float64

LengthSqr returns the magnitude squared of the vector. This is cheaper to compute than Length.

func (Vector) Negate ¶

func (v Vector) Negate() Vector

Negate returns a new vector in the opposite direction.

func (Vector) Normalize ¶

func (v Vector) Normalize() Vector

Normalize creates a new vector that is of unit length in the same direction as the vector.

func (Vector) Scale ¶

func (v Vector) Scale(s float64) Vector

Scale multiplies all of a vector's components by a scalar.

func (Vector) String ¶

func (v Vector) String() string

func (Vector) Vec3 ¶

func (v Vector) Vec3() Vector

Vec3 returns a copy of the vector with the 4th component set to zero.

Source Files ¶

View all Source files

vec64.go

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