calc

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 Go to latest Published: Nov 3, 2019 License: MIT Imports: 1 Imported by: 0

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Constants

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Variables

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Functions

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Types

type Mat3 

type Mat3 [3][4]float32

Mat3 is 3x3 matrix

func Mat3Ident 

func Mat3Ident() Mat3

Mat3Ident return identity

func Mat3OrthoYDown 

func Mat3OrthoYDown(left, right, top, bottom float32) Mat3

func Mat3OrthoYUp 

func Mat3OrthoYUp(left, right, top, bottom float32) Mat3

func Mat3Scale 

func Mat3Scale(sx float32, sy float32) (scale Mat3)

func Mat3Trans 

func Mat3Trans(dx float32, dy float32) (trans Mat3)

func (Mat3) Add 

func (a Mat3) Add(b Mat3) (c Mat3)

func (Mat3) Mat4 

func (m Mat3) Mat4() Mat4

func (Mat3) Mul 

func (a Mat3) Mul(b Mat3) (c Mat3)

Mul calculate a * b

func (Mat3) MulScalar 

func (a Mat3) MulScalar(b float32) (c Mat3)

func (Mat3) MulVec 

func (m Mat3) MulVec(a [3]float32) (b [3]float32)

func (Mat3) MulVec2 

func (m Mat3) MulVec2(a [2]float32) [2]float32

func (Mat3) Sub 

func (a Mat3) Sub(b Mat3) (c Mat3)

func (Mat3) Transpose 

func (m Mat3) Transpose() (x Mat3)

type Mat4 

type Mat4 [4][4]float32

Mat4 is 4x4 matrix

func Mat4Frustum 

func Mat4Frustum(left, right, top, bottom, near, far float32) Mat4

Mt4Frustum construct projection matrix for Vulkan. normaly left, right, top, bottom, near and far are all positive. EYE space X-right, Y-up, Z-back. NDC space X-right, Y-down, Z-forword. NDC range x => [-1, +1], y => [-1, +1], z => [0, +1].

func Mat4Ident 

func Mat4Ident() Mat4

Mat4Ident return identity

func Mat4LookAt 

func Mat4LookAt(eye, lookAt, up Vec3) (m Mat4)

func Mat4OrthoYDown 

func Mat4OrthoYDown(left, right, top, bottom, near, far float32) Mat4

func Mat4OrthoYUp 

func Mat4OrthoYUp(left, right, top, bottom, near, far float32) Mat4

func Mat4Persp 

func Mat4Persp(fovYRadian, aspectXtoY, near, far float32) (m Mat4)

func Mat4RotAround 

func Mat4RotAround(u Vec3, angle float32) (rot Mat4)

func Mat4RotDir 

func Mat4RotDir(from, to Vec3) (rot Mat4)

func Mat4RotX 

func Mat4RotX(angle float32) (rot Mat4)

func Mat4RotY 

func Mat4RotY(angle float32) (rot Mat4)

func Mat4RotZ 

func Mat4RotZ(angle float32) (rot Mat4)

func Mat4Scale 

func Mat4Scale(sx float32, sy float32, sz float32) (scale Mat4)

func Mat4Trans 

func Mat4Trans(dx float32, dy float32, dz float32) (trans Mat4)

func (Mat4) Add 

func (a Mat4) Add(b Mat4) (c Mat4)

func (Mat4) Det 

func (m Mat4) Det() float32

func (Mat4) Inverse 

func (m Mat4) Inverse() (b Mat4)

func (Mat4) Mat3 

func (m Mat4) Mat3() Mat3

func (Mat4) Mul 

func (a Mat4) Mul(b Mat4) (c Mat4)

Mul calculate a * b

func (Mat4) MulScalar 

func (a Mat4) MulScalar(b float32) (c Mat4)

func (Mat4) MulVec 

func (m Mat4) MulVec(a [4]float32) (b [4]float32)

func (Mat4) MulVec3 

func (m Mat4) MulVec3(a [3]float32) [3]float32

func (Mat4) Quat 

func (a Mat4) Quat() (q Quat)

Quat convert pure-rotation matrix a to quiternion q

func (Mat4) Sub 

func (a Mat4) Sub(b Mat4) (c Mat4)

func (Mat4) Transpose 

func (m Mat4) Transpose() (x Mat4)

type Mat4Stack 

type Mat4Stack []Mat4

func (*Mat4Stack) Get 

func (s *Mat4Stack) Get() Mat4

func (*Mat4Stack) GetFloatPtr 

func (s *Mat4Stack) GetFloatPtr() *float32

func (*Mat4Stack) GetPtr 

func (s *Mat4Stack) GetPtr() *Mat4

func (*Mat4Stack) Load 

func (s *Mat4Stack) Load(m Mat4)

func (*Mat4Stack) Multi 

func (s *Mat4Stack) Multi(m Mat4)

func (*Mat4Stack) Pop 

func (s *Mat4Stack) Pop()

func (*Mat4Stack) Push 

func (s *Mat4Stack) Push()

type Point2 

type Point2 Vec2

Point2 (x, y)

func (Point2) X 

func (a Point2) X() float32

func (Point2) Y 

func (a Point2) Y() float32

type Quat 

type Quat [4]float32

Quaternion x*i + y*j + z*k + w*1

func QuatBezierSlerp 

func QuatBezierSlerp(a, b, c, d Quat, t float32) (e Quat)

QuatBezierSlerp bezier spherical linear interpolation

func QuatRotAround 

func QuatRotAround(u Vec3, angle float32) (rot Quat)

func (Quat) Angle 

func (a Quat) Angle(b Quat) float32

Angle

func (Quat) Conj 

func (a Quat) Conj() Quat

Conj conjugate 共轭?

func (Quat) CosHalfAngle 

func (a Quat) CosHalfAngle(b Quat) float32

CosHalfAngle reports cos(θ/2)

func (Quat) Inv 

func (a Quat) Inv() Quat

func (Quat) Mat4 

func (a Quat) Mat4() (rot Mat4)

func (Quat) Mul 

func (a Quat) Mul(b Quat) Quat

func (Quat) Norm 

func (a Quat) Norm() float32

Norm 模

func (Quat) Normalized 

func (a Quat) Normalized() Quat

Normalized 单位四元数

func (Quat) Slerp 

func (a Quat) Slerp(b Quat, t float32) (c Quat)

Slerp spherical linear interpolation

type Range2 

type Range2 [4]float32

Range2 (x0, y0, x1, y1)

func (Range2) Center 

func (a Range2) Center() Point2

func (Range2) Contains 

func (a Range2) Contains(b Range2) bool

func (Range2) ContainsPoint 

func (a Range2) ContainsPoint(pt Point2) bool
func (a Range2) Equals(b Range2) bool {
	return a[0] == b[0] && a[1] == b[1] && a[2] == b[2] && a[3] == b[3]
}

func (Range2) ContainsRect 

func (a Range2) ContainsRect(b Rect2) bool

func (Range2) Deflate 

func (a Range2) Deflate(d RangeDelta2) Range2

func (Range2) Dx 

func (a Range2) Dx() float32

func (Range2) Dy 

func (a Range2) Dy() float32

func (Range2) Inflate 

func (a Range2) Inflate(d RangeDelta2) Range2

func (Range2) Intersect 

func (a Range2) Intersect(b Range2) Range2

func (Range2) IsPositive 

func (a Range2) IsPositive() bool

func (Range2) Normalize 

func (a Range2) Normalize() (b Range2)

func (Range2) Rect 

func (a Range2) Rect() Rect2

func (Range2) Round 

func (a Range2) Round() Rect2

func (Range2) Union 

func (a Range2) Union(b Range2) Range2

func (Range2) X 

func (a Range2) X() float32

func (Range2) X0 

func (a Range2) X0() float32

func (Range2) X1 

func (a Range2) X1() float32

func (Range2) Y 

func (a Range2) Y() float32

func (Range2) Y0 

func (a Range2) Y0() float32

func (Range2) Y1 

func (a Range2) Y1() float32

type RangeDelta2 

type RangeDelta2 [4]float32

RangeDelta2 (dx0, dy0, dx1, dy1)

func (RangeDelta2) Dx 

func (a RangeDelta2) Dx() float32

func (RangeDelta2) Dx0 

func (a RangeDelta2) Dx0() float32

func (RangeDelta2) Dx1 

func (a RangeDelta2) Dx1() float32

func (RangeDelta2) Dy 

func (a RangeDelta2) Dy() float32

func (RangeDelta2) Dy0 

func (a RangeDelta2) Dy0() float32

func (RangeDelta2) Dy1 

func (a RangeDelta2) Dy1() float32

func (RangeDelta2) Round 

func (a RangeDelta2) Round() RangeDelta2

type Rect2 

type Rect2 [4]float32

Rect2 (x, y, width, height)

func (Rect2) Center 

func (a Rect2) Center() Point2

func (Rect2) Contains 

func (a Rect2) Contains(b Rect2) bool

func (Rect2) ContainsPoint 

func (a Rect2) ContainsPoint(pt Point2) bool
func (a Rect2) Equals(b Rect2) bool {
	return a[0] == b[0] && a[1] == b[1] && a[2] == b[2] && a[3] == b[3]
}

func (Rect2) ContainsRange 

func (a Rect2) ContainsRange(b Range2) bool

func (Rect2) Deflate 

func (a Rect2) Deflate(d RangeDelta2) Rect2

func (Rect2) Dx 

func (a Rect2) Dx() float32

func (Rect2) Dy 

func (a Rect2) Dy() float32

func (Rect2) Inflate 

func (a Rect2) Inflate(d RangeDelta2) Rect2

func (Rect2) Intersect 

func (a Rect2) Intersect(b Rect2) Rect2

func (Rect2) IsPositive 

func (a Rect2) IsPositive() bool

func (Rect2) Positive 

func (a Rect2) Positive() (b Rect2)

func (Rect2) Range 

func (a Rect2) Range() Range2

func (Rect2) Round 

func (a Rect2) Round() Rect2

func (Rect2) Union 

func (a Rect2) Union(b Rect2) Rect2

func (Rect2) X 

func (a Rect2) X() float32

func (Rect2) X0 

func (a Rect2) X0() float32

func (Rect2) X1 

func (a Rect2) X1() float32

func (Rect2) Y 

func (a Rect2) Y() float32

func (Rect2) Y0 

func (a Rect2) Y0() float32

func (Rect2) Y1 

func (a Rect2) Y1() float32

type Size2 

type Size2 Vec2

Size2 (dx, dy)

func (Size2) Dx 

func (a Size2) Dx() float32

func (Size2) Dy 

func (a Size2) Dy() float32

type Vec2 

type Vec2 [2]float32

Vec2 is 2D vector

func (Vec2) Add 

func (v Vec2) Add(a Vec2) Vec2

Add vector

func (Vec2) Dot 

func (v Vec2) Dot(b Vec2) float32

Dot product

func (Vec2) Kross 

func (v Vec2) Kross(b Vec2) float32

Kross product

func (Vec2) Len 

func (v Vec2) Len() float32

func (Vec2) LenPow2 

func (v Vec2) LenPow2() float32

func (Vec2) Neg 

func (v Vec2) Neg() Vec2

Neg returns negative vector

func (Vec2) Normalized 

func (v Vec2) Normalized() (ret Vec2)

Normalized vector

func (Vec2) Sub 

func (v Vec2) Sub(a Vec2) Vec2

Sub substract vector

func (Vec2) X 

func (v Vec2) X() float32

X component

func (Vec2) Y 

func (v Vec2) Y() float32

Y component

type Vec3 

type Vec3 [3]float32

Vec3 is 3D vector

func (Vec3) Add 

func (v Vec3) Add(a Vec3) Vec3

Add vector

func (Vec3) Cross 

func (v Vec3) Cross(b Vec3) Vec3

Cross product

func (Vec3) Dot 

func (v Vec3) Dot(b Vec3) float32

Dot product

func (Vec3) Len 

func (v Vec3) Len() float32

func (Vec3) LenPow2 

func (v Vec3) LenPow2() float32

func (Vec3) Neg 

func (v Vec3) Neg() Vec3

Neg returns negative vector

func (Vec3) Normalized 

func (v Vec3) Normalized() (ret Vec3)

Normalized vector

func (Vec3) Sub 

func (v Vec3) Sub(a Vec3) Vec3

Sub substract vector

func (Vec3) X 

func (v Vec3) X() float32

X component

func (Vec3) Y 

func (v Vec3) Y() float32

Y component

func (Vec3) Z 

func (v Vec3) Z() float32

Z component

type Vec4 

type Vec4 [4]float32

Vec4 is 4D vector

func (Vec4) Add 

func (v Vec4) Add(a Vec4) Vec4

Add vector

func (Vec4) Dot 

func (v Vec4) Dot(b Vec4) float32

Dot product

func (Vec4) Len 

func (v Vec4) Len() float32

func (Vec4) LenPow2 

func (v Vec4) LenPow2() float32

func (Vec4) Neg 

func (v Vec4) Neg() Vec4

Neg returns negative vector

func (Vec4) Normalized 

func (v Vec4) Normalized() (ret Vec4)

Normalized vector

func (Vec4) Sub 

func (v Vec4) Sub(a Vec4) Vec4

Sub substract vector

func (Vec4) W 

func (v Vec4) W() float32

W component

func (Vec4) X 

func (v Vec4) X() float32

X component

func (Vec4) Y 

func (v Vec4) Y() float32

Y component

func (Vec4) Z 

func (v Vec4) Z() float32

Z component

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