v2

package

v0.0.0-...-32a2d26 Latest Latest Go to latest Published: Dec 4, 2018 License: Apache-2.0 Imports: 2 Imported by: 0

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Repository

github.com/shnifer/magellan

Links

Open Source Insights

Documentation ¶

Overview ¶

2D vectors lib

Constants ¶

View Source

const Deg2Rad = math.Pi / 180

View Source

const Rad2Deg = 180 / math.Pi

Variables ¶

This section is empty.

Functions ¶

func Dir ¶

func Dir(v V2) float64

func Len ¶

func Len(a V2) float64

Len return length of vector a

func LenSqr ¶

func LenSqr(a V2) float64

LenSqr return square length of vector a

Types ¶

type V2 ¶

type V2 struct {
	X float64 `json:",omitempty"`
	Y float64 `json:",omitempty"`
}

float64 vector2

var ZV V2

zero vector

func Add ¶

func Add(a, b V2) V2

Add returns vector equal to sum a+b

func AddMul ¶

func AddMul(a, b V2, t float64) V2

AddMul returns a new vector = a+b*t

func ApplyOnTransform ¶

func ApplyOnTransform(V, pos V2, angle float64) V2

ApplyOnTransform translate vector V moving by pos and turning by angle degrees

func InDir ¶

func InDir(angle float64) V2

InDir return an ort vector in direction of angle degrees 0 angle is up (0,1), positive direction is counterclockwise for world coords primary, use for screen coords with caution (because of Y axis)

func Mul ¶

func Mul(a V2, t float64) V2

Mul returns vector a multiplied by t

func MulXY ¶

func MulXY(a V2, b V2) V2

Mul returns vector a.x*b.x; a.y*b.y

func Normed ¶

func Normed(a V2) V2

Normed returns normed copy of vector a with len = 1

func RandomInCircle ¶

func RandomInCircle(R float64) V2

RandomInCircle returns a random vector in circle with radius R

func RandomOrt ¶

func RandomOrt() V2

RandomOrt returns a random vector with len = 1

func Rotate ¶

func Rotate(V V2, angle float64) V2

Rotate returns a new vector equal to V rotated by angle degrees

func Rotate90 ¶

func Rotate90(a V2) V2

Rotate returns a new vector equal to V rotated by 90 degrees

func Sub ¶

func Sub(a, b V2) V2

Sub returns vector equal to a-b

func (V2) Add ¶

func (a V2) Add(b V2) V2

func (V2) AddMul ¶

func (a V2) AddMul(b V2, t float64) V2

func (V2) ApplyOnTransform ¶

func (v V2) ApplyOnTransform(pos V2, angle float64) V2

func (V2) Dir ¶

func (a V2) Dir() float64

func (*V2) DoAddMul ¶

func (a *V2) DoAddMul(b V2, t float64)

func (*V2) DoNorm ¶

func (a *V2) DoNorm()

func (V2) Len ¶

func (a V2) Len() float64

func (V2) LenSqr ¶

func (a V2) LenSqr() float64

func (V2) Mul ¶

func (a V2) Mul(t float64) V2

func (V2) MulXY ¶

func (a V2) MulXY(b V2) V2

func (V2) Normed ¶

func (a V2) Normed() V2

func (V2) Rotate ¶

func (a V2) Rotate(angle float64) V2

func (V2) Rotate90 ¶

func (a V2) Rotate90() V2

func (V2) Sub ¶

func (a V2) Sub(b V2) V2

Source Files ¶

View all Source files

v2.go

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