linmath

package module
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 Go to latest Published: Sep 22, 2022 License: MIT Imports: 4 Imported by: 34

README

linmath GoDoc

A small library for linear math as required for computer graphics. This is a Go-lang port of github.com/datenwolf/linmath.h.

linmath.h provides the most used types required programming computer graphice:

vec3 -- 3 element vector of floats
vec4 -- 4 element vector of floats (4th component used for homogenous computations)
mat4x4 -- 4 by 4 elements matrix, computations are done in column major order
quat -- quaternion

The types are deliberately named like the types in GLSL. In fact they are meant to
be used for the client side computations and passing to same typed GLSL uniforms.

License

MIT (re-licensed from the WTFPL).

Documentation

Index

Constants

View Source 
const (
	SizeofMat4x4 = int(unsafe.Sizeof(Mat4x4{}))
	SizeofVec4   = int(unsafe.Sizeof(Vec4{}))
	SizeofVec3   = int(unsafe.Sizeof(Vec3{}))
	SizeofVec2   = int(unsafe.Sizeof(Vec2{}))
)

Variables

This section is empty.

Functions

func DegreesToRadians 

func DegreesToRadians(angleDegrees float32) float32

DegreesToRadians converts degrees to radians.

func DumpMatrix 

func DumpMatrix(m *Mat4x4, note string) string

func DumpQuat 

func DumpQuat(q *Quat, note string) string

func DumpVec4 

func DumpVec4(v *Vec4, note string) string

func QuatInnerProduct 

func QuatInnerProduct(a, b *Quat) (p float32)

func QuatMultInner3 

func QuatMultInner3(a, b *Quat) (p float32)

QuatMultInner the same as for Vec3

func RadiansToDegrees 

func RadiansToDegrees(angleRadians float32) float32

RadiansToDegrees converts radians to degrees.

func Vec2MultInner 

func Vec2MultInner(a, b *Vec2) (p float32)

func Vec3MultInner 

func Vec3MultInner(a, b *Vec3) (p float32)

func Vec4MultInner 

func Vec4MultInner(a, b *Vec4) (p float32)

func Vec4MultInner3 

func Vec4MultInner3(a, b *Vec4) (p float32)

Types

type ArrayFloat32 

type ArrayFloat32 []float32

func (ArrayFloat32) Data 

func (a ArrayFloat32) Data() []byte

func (ArrayFloat32) Sizeof 

func (a ArrayFloat32) Sizeof() int

type ArrayUint16 

type ArrayUint16 []uint16

func (ArrayUint16) Data 

func (a ArrayUint16) Data() []byte

func (ArrayUint16) Sizeof 

func (a ArrayUint16) Sizeof() int

type ArrayVec2 

type ArrayVec2 []Vec2

func (ArrayVec2) Data 

func (a ArrayVec2) Data() []byte

func (ArrayVec2) Sizeof 

func (a ArrayVec2) Sizeof() int

type ArrayVec3 

type ArrayVec3 []Vec3

func (ArrayVec3) Data 

func (a ArrayVec3) Data() []byte

func (ArrayVec3) Sizeof 

func (a ArrayVec3) Sizeof() int

type ArrayVec4 

type ArrayVec4 []Vec4

func (ArrayVec4) Data 

func (a ArrayVec4) Data() []byte

func (ArrayVec4) Sizeof 

func (a ArrayVec4) Sizeof() int

type Mat4x4 

type Mat4x4 [4]Vec4

func (*Mat4x4) Add 

func (m *Mat4x4) Add(a, b *Mat4x4)

func (*Mat4x4) Data 

func (m *Mat4x4) Data() []byte

func (*Mat4x4) Dup 

func (m *Mat4x4) Dup(n *Mat4x4)

func (*Mat4x4) Fill 

func (m *Mat4x4) Fill(d float32)

func (*Mat4x4) FromQuat 

func (m *Mat4x4) FromQuat(q *Quat)

func (*Mat4x4) FromVec3MultOuter 

func (m *Mat4x4) FromVec3MultOuter(a, b *Vec3)

func (*Mat4x4) Frustum 

func (m *Mat4x4) Frustum(l, r, b, t, n, f float32)

func (*Mat4x4) Identity 

func (m *Mat4x4) Identity()

func (*Mat4x4) Invert 

func (t *Mat4x4) Invert(m *Mat4x4)

func (*Mat4x4) LookAt 

func (m *Mat4x4) LookAt(eye, center, up *Vec3)

func (*Mat4x4) Mult 

func (m *Mat4x4) Mult(a, b *Mat4x4)

func (*Mat4x4) MultQuat 

func (r *Mat4x4) MultQuat(m *Mat4x4, q *Quat)

func (*Mat4x4) Ortho 

func (m *Mat4x4) Ortho(l, r, b, t, n, f float32)

func (*Mat4x4) OrthoNormalize 

func (r *Mat4x4) OrthoNormalize(m *Mat4x4)

func (*Mat4x4) Perspective 

func (m *Mat4x4) Perspective(y_fov, aspect, n, f float32)

func (*Mat4x4) Rotate 

func (r *Mat4x4) Rotate(m *Mat4x4, x, y, z, angle float32)

func (*Mat4x4) RotateX 

func (q *Mat4x4) RotateX(m *Mat4x4, angle float32)

func (*Mat4x4) RotateY 

func (q *Mat4x4) RotateY(m *Mat4x4, angle float32)

func (*Mat4x4) RotateZ 

func (q *Mat4x4) RotateZ(m *Mat4x4, angle float32)

func (*Mat4x4) Scale 

func (m *Mat4x4) Scale(a *Mat4x4, k float32)

func (*Mat4x4) ScaleAniso 

func (m *Mat4x4) ScaleAniso(a *Mat4x4, x, y, z float32)

func (*Mat4x4) Sub 

func (m *Mat4x4) Sub(a, b *Mat4x4)

func (*Mat4x4) Translate 

func (m *Mat4x4) Translate(x, y, z float32)

func (*Mat4x4) TranslateInPlace 

func (m *Mat4x4) TranslateInPlace(x, y, z float32)

func (*Mat4x4) Transpose 

func (m *Mat4x4) Transpose(n *Mat4x4)

type Quat 

type Quat [4]float32

func (*Quat) Add 

func (r *Quat) Add(a, b *Quat)

func (*Quat) AddVec3 

func (r *Quat) AddVec3(a *Quat, v *Vec3)

func (*Quat) Conj 

func (r *Quat) Conj(q *Quat)

func (*Quat) FromMat4x4 

func (q *Quat) FromMat4x4(m *Mat4x4)

func (*Quat) Identity 

func (q *Quat) Identity()

func (*Quat) Len 

func (q *Quat) Len() float32

func (*Quat) Mult 

func (r *Quat) Mult(p, q *Quat)

func (*Quat) MultCross3 

func (r *Quat) MultCross3(a, b *Quat)

MultCross the same as for Vec3

func (*Quat) Norm 

func (r *Quat) Norm(q *Quat)

func (*Quat) Scale 

func (r *Quat) Scale(q *Quat, s float32)

func (*Quat) Sub 

func (r *Quat) Sub(a, b *Quat)

type Vec2 

type Vec2 [2]float32

func (*Vec2) Add 

func (r *Vec2) Add(a, b *Vec2)

func (*Vec2) Len 

func (v *Vec2) Len() float32

func (*Vec2) Max 

func (r *Vec2) Max(a, b *Vec2)

func (*Vec2) Min 

func (r *Vec2) Min(a, b *Vec2)

func (*Vec2) Norm 

func (r *Vec2) Norm(v *Vec2)

func (*Vec2) Scale 

func (r *Vec2) Scale(v *Vec2, s float32)

func (*Vec2) Sub 

func (r *Vec2) Sub(a, b *Vec2)

type Vec3 

type Vec3 [3]float32

func (*Vec3) Add 

func (r *Vec3) Add(a, b *Vec3)

func (*Vec3) Len 

func (v *Vec3) Len() float32

func (*Vec3) Max 

func (r *Vec3) Max(a, b *Vec3)

func (*Vec3) Min 

func (r *Vec3) Min(a, b *Vec3)

func (*Vec3) MultCross 

func (r *Vec3) MultCross(a, b *Vec3)

func (*Vec3) Norm 

func (r *Vec3) Norm(v *Vec3)

func (*Vec3) QuatMultVec3 

func (r *Vec3) QuatMultVec3(q *Quat, v *Vec3)

func (*Vec3) Reflect 

func (r *Vec3) Reflect(v, n *Vec3)

func (*Vec3) Scale 

func (r *Vec3) Scale(v *Vec3, s float32)

func (*Vec3) ScaleQuat 

func (r *Vec3) ScaleQuat(q *Quat, s float32)

func (*Vec3) ScaleVec4 

func (r *Vec3) ScaleVec4(v *Vec4, s float32)

func (*Vec3) Sub 

func (r *Vec3) Sub(a, b *Vec3)

type Vec4 

type Vec4 [4]float32

func (*Vec4) Add 

func (r *Vec4) Add(a, b *Vec4)

func (*Vec4) Len 

func (v *Vec4) Len() float32

func (*Vec4) Mat4x4Col 

func (r *Vec4) Mat4x4Col(m *Mat4x4, i int)

func (*Vec4) Mat4x4MultVec4 

func (r *Vec4) Mat4x4MultVec4(m *Mat4x4, v Vec4)

func (*Vec4) Mat4x4Row 

func (r *Vec4) Mat4x4Row(m *Mat4x4, i int)

func (*Vec4) Max 

func (r *Vec4) Max(a, b *Vec4)

func (*Vec4) Min 

func (r *Vec4) Min(a, b *Vec4)

func (*Vec4) MultCross 

func (r *Vec4) MultCross(a, b *Vec4)

func (*Vec4) Norm 

func (r *Vec4) Norm(v *Vec4)

func (*Vec4) QuatMultVec4 

func (r *Vec4) QuatMultVec4(q *Quat, v *Vec4)

func (*Vec4) Reflect 

func (r *Vec4) Reflect(v, n *Vec4)

func (*Vec4) Scale 

func (r *Vec4) Scale(v *Vec4, s float32)

func (*Vec4) Sub 

func (r *Vec4) Sub(a, b *Vec4)

func (*Vec4) SubVec3 

func (r *Vec4) SubVec3(a *Vec4, b *Vec3)

Source Files

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