glw

package module
v0.0.0-...-1e03496 Latest Latest
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 Go to latest Published: Jan 13, 2022 License: BSD-2-Clause Imports: 17 Imported by: 0

Documentation

Index

Constants

This section is empty.

Variables

View Source 
var (
	FilterNearest = TextureFilter(gl.NEAREST, gl.NEAREST)
	FilterLinear  = TextureFilter(gl.LINEAR, gl.LINEAR)
	WrapClamp     = TextureWrap(gl.CLAMP_TO_EDGE, gl.CLAMP_TO_EDGE)
	WrapRepeat    = TextureWrap(gl.REPEAT, gl.REPEAT)
)
View Source 
var ErrNotZero = errors.New("Metric distance not zero")

Functions

func Context 

func Context() gl.Context

func Duration 

func Duration(d time.Duration) func(Animator)

func ExpDecay 

func ExpDecay(t float64) float64

func Interp 

func Interp(fn func(float64) float64) func(Animator)

func MustOpen 

func MustOpen(name string) asset.File

func MustReadAll 

func MustReadAll(filename string) []byte

MustReadAll reads the file named by filename from assets and returns the contents or panics on error.

func Notify 

func Notify(p *uint32) func(Animator)

func Ntou 

func Ntou(n float32) float32

Ntou converts norm to unit.

func RGBA 

func RGBA(c color.Color) (r, g, b, a float32)

func RotateAt 

func RotateAt(angle float32, axis f32.Vec3) func(Transformer)

func RotateBy 

func RotateBy(angle float32, axis f32.Vec3) func(Transformer)

func RotateTo 

func RotateTo(angle float32, axis f32.Vec3) func(Transformer)

func ScaleAt 

func ScaleAt(v f32.Vec4) func(Transformer)

func ScaleBy 

func ScaleBy(v f32.Vec4) func(Transformer)

func ScaleTo 

func ScaleTo(v f32.Vec4) func(Transformer)

func ShearAt 

func ShearAt(v f32.Vec4) func(Transformer)

func ShearBy 

func ShearBy(v f32.Vec4) func(Transformer)

func ShearTo 

func ShearTo(v f32.Vec4) func(Transformer)

func TextureFilter 

func TextureFilter(min, mag int) func(*Texture)

func TextureWrap 

func TextureWrap(s, t int) func(*Texture)

func Tick 

func Tick(d time.Duration) func(Animator)

func To 

func To(t Transform) func(Transformer)

func TranslateAt 

func TranslateAt(v f32.Vec4) func(Transformer)

func TranslateBy 

func TranslateBy(v f32.Vec4) func(Transformer)

func TranslateTo 

func TranslateTo(v f32.Vec4) func(Transformer)

func Uton 

func Uton(u float32) float32

Uton converts unit to norm.

func Vec2 

func Vec2(v0, v1 float32) f32.Vec2

func Vec3 

func Vec3(v0, v1, v2 float32) f32.Vec3

func Vec4 

func Vec4(v0, v1, v2, v3 float32) f32.Vec4

func With 

func With(glctx gl.Context) gl.Context

TODO allow package to be used by multiple contexts in parallel.

Types

type A2fv 

type A2fv gl.Attrib

func (A2fv) Disable 

func (a A2fv) Disable()

func (A2fv) Enable 

func (a A2fv) Enable()

func (A2fv) Pointer 

func (a A2fv) Pointer()

type A3fv 

type A3fv gl.Attrib

func (A3fv) Disable 

func (a A3fv) Disable()

func (A3fv) Enable 

func (a A3fv) Enable()

func (A3fv) Pointer 

func (a A3fv) Pointer()

type A4fv 

type A4fv gl.Attrib

func (A4fv) Disable 

func (a A4fv) Disable()

func (A4fv) Enable 

func (a A4fv) Enable()

func (A4fv) Pointer 

func (a A4fv) Pointer()

type Animator 

type Animator interface {
	// Apply sets default options on animator. Any animation in progress is cancelled
	// first unless the length of options is zero, then this call has no effect.
	Apply(options ...func(Animator))

	Tick(time.Duration)

	Duration(time.Duration)

	// Interp defaults to exponential decay.
	Interp(func(float64) float64)

	Notify(*uint32)

	At() Transform

	Start(transforms ...func(Transformer))

	Stage(epoch time.Time, transforms ...func(Transformer))

	Step(now time.Time) bool

	Cancel()
}

type FPS 

type FPS struct{ time.Time }

func (*FPS) Update 

func (fps *FPS) Update(a time.Time)

type FloatBuffer 

type FloatBuffer struct {
	gl.Buffer
	// contains filtered or unexported fields
}

func (*FloatBuffer) Bind 

func (buf *FloatBuffer) Bind()

func (*FloatBuffer) Create 

func (buf *FloatBuffer) Create(usage gl.Enum, data []float32)

func (FloatBuffer) Delete 

func (buf FloatBuffer) Delete()

func (FloatBuffer) Draw 

func (buf FloatBuffer) Draw(mode gl.Enum)

func (FloatBuffer) Unbind 

func (buf FloatBuffer) Unbind()

func (*FloatBuffer) Update 

func (buf *FloatBuffer) Update(data []float32)

type FragAsset 

type FragAsset string

FragAsset is a filename in assets containing fragment shader source code.

func (FragAsset) Source 

func (name FragAsset) Source() FragSrc

Source returns the contents of the named file in assets or panics on error.

type FragSrc 

type FragSrc string

FragSrc is fragment shader source code.

func (FragSrc) Compile 

func (src FragSrc) Compile() (gl.Shader, error)

Compile returns the compiled shader of src and error if any.

type FrameBuffer 

type FrameBuffer struct {
	gl.Framebuffer
	// contains filtered or unexported fields
}

func (*FrameBuffer) Attach 

func (buf *FrameBuffer) Attach()

func (*FrameBuffer) Create 

func (buf *FrameBuffer) Create(options ...func(*Texture))

func (*FrameBuffer) Delete 

func (buf *FrameBuffer) Delete()

func (*FrameBuffer) Detach 

func (buf *FrameBuffer) Detach()

func (*FrameBuffer) RGBA 

func (buf *FrameBuffer) RGBA() *image.RGBA

func (*FrameBuffer) Update 

func (buf *FrameBuffer) Update(width, height int)

type Program 

type Program struct{ gl.Program }

Program identifies a compiled shader program. The bool Program.Init can be used to check if valid.

func (Program) Attrib 

func (prg Program) Attrib(name string) gl.Attrib

Attrib returns attribute location by name in program.

func (*Program) Build 

func (prg *Program) Build(vsrc VertSrc, fsrc FragSrc) error

Build compiles shaders and links program.

func (*Program) BuildAssets 

func (prg *Program) BuildAssets(vtag VertAsset, ftag FragAsset) error

BuildAssets is a helper that wraps Program.Build with asset file contents of filenames vtag and ftag.

func (Program) Delete 

func (prg Program) Delete()

Delete frees the memory and invalidates the name associated with the program.

func (*Program) Install 

func (prg *Program) Install(vsrc VertSrc, fsrc FragSrc) error

Install is a helper that wraps Program.Build and Program.Use.

func (*Program) MustBuild 

func (prg *Program) MustBuild(vsrc VertSrc, fsrc FragSrc)

MustBuild is a helper that wraps Program.Build and panics on error.

func (*Program) MustBuildAssets 

func (prg *Program) MustBuildAssets(vtag VertAsset, ftag FragAsset)

MustBuildAssets is a helper that wraps Program.BuildAssets and panics on error.

func (Program) Uniform 

func (prg Program) Uniform(name string) gl.Uniform

Uniform returns uniform location by name in program.

func (Program) Unmarshal 

func (prg Program) Unmarshal(dst interface{})

Unmarshal recursively sets fields of dst for recognized types.

func (Program) Use 

func (prg Program) Use()

Use installs program as part of current rendering state.

type Sampler 

type Sampler struct {
	Texture
	U1i
}

func (*Sampler) Bind 

func (a *Sampler) Bind()

type Side 

type Side int
const (
	Start Side = iota
	End
	Top
	Bottom
)

type T 

type T struct {
}

func (*T) BottomAt 

func (a *T) BottomAt(t T, d Side)

func (*T) EndAt 

func (a *T) EndAt(t T, d Side)

func (*T) SetHeight 

func (a *T) SetHeight(x int)

func (*T) SetWidth 

func (a *T) SetWidth(x int)

func (*T) StartAt 

func (a *T) StartAt(t T, d Side)

func (*T) TopAt 

func (a *T) TopAt(t T, d Side)

type Texture 

type Texture struct {
	gl.Texture
	// contains filtered or unexported fields
}

func (Texture) At 

func (tex Texture) At(x, y int) color.Color

func (Texture) Bind 

func (tex Texture) Bind()

func (Texture) Bounds 

func (tex Texture) Bounds() image.Rectangle

func (Texture) ColorModel 

func (tex Texture) ColorModel() color.Model

func (*Texture) Create 

func (tex *Texture) Create(options ...func(*Texture))

func (*Texture) Delete 

func (tex *Texture) Delete()

func (*Texture) DrawSrc 

func (tex *Texture) DrawSrc(src *image.RGBA)

func (Texture) GenerateMipmap 

func (tex Texture) GenerateMipmap()

func (Texture) Unbind 

func (tex Texture) Unbind()

func (*Texture) Upload 

func (tex *Texture) Upload(src *image.RGBA)

type Transform 

type Transform struct {
	Translate f32.Vec4
	Shear     f32.Vec4
	Rotate    f32.Vec4
	Scale     f32.Vec4
}

TODO this is essentially type Sheet, but should vectors be tucked behind Transform type ???

func TransformIdent 

func TransformIdent() (a Transform)

func (*Transform) RotateBy 

func (a *Transform) RotateBy(angle float32, axis f32.Vec3)

func (*Transform) RotateTo 

func (a *Transform) RotateTo(angle float32, axis f32.Vec3)

func (*Transform) ScaleBy 

func (a *Transform) ScaleBy(v f32.Vec4)

func (*Transform) ScaleTo 

func (a *Transform) ScaleTo(v f32.Vec4)

func (*Transform) ShearBy 

func (a *Transform) ShearBy(v f32.Vec4)

func (*Transform) ShearTo 

func (a *Transform) ShearTo(v f32.Vec4)

func (*Transform) TranslateBy 

func (a *Transform) TranslateBy(v f32.Vec4)

func (*Transform) TranslateTo 

func (a *Transform) TranslateTo(v f32.Vec4)

type Transformer 

type Transformer interface {
	To(Transform)
	TranslateAt(f32.Vec4)
	TranslateBy(f32.Vec4)
	TranslateTo(f32.Vec4)
	ShearAt(f32.Vec4)
	ShearBy(f32.Vec4)
	ShearTo(f32.Vec4)
	RotateAt(angle float32, axis f32.Vec3)
	RotateBy(angle float32, axis f32.Vec3)
	RotateTo(angle float32, axis f32.Vec3)
	ScaleAt(f32.Vec4)
	ScaleBy(f32.Vec4)
	ScaleTo(f32.Vec4)
}

type U16fv 

type U16fv struct {
	// contains filtered or unexported fields
}

func (U16fv) Animator 

func (u U16fv) Animator(options ...func(Animator)) Animator

func (U16fv) At 

func (u U16fv) At() Transform

func (*U16fv) Inv2f 

func (u *U16fv) Inv2f(nx, ny float32) (float32, float32)

func (*U16fv) Ortho 

func (u *U16fv) Ortho(l, r float32, b, t float32, n, f float32)

func (U16fv) Stage 

func (u U16fv) Stage(epoch time.Time, transforms ...func(Transformer))

func (U16fv) Step 

func (u U16fv) Step(now time.Time) (ok bool)

func (U16fv) String 

func (u U16fv) String() string

func (U16fv) Transform 

func (u U16fv) Transform(transforms ...func(Transformer))

func (*U16fv) Update 

func (u *U16fv) Update()

type U1f 

type U1f struct {
	// contains filtered or unexported fields
}

func (U1f) Animator 

func (u U1f) Animator(options ...func(Animator)) Animator

func (U1f) At 

func (u U1f) At() Transform

func (U1f) Stage 

func (u U1f) Stage(epoch time.Time, transforms ...func(Transformer))

func (U1f) Step 

func (u U1f) Step(now time.Time) (ok bool)

func (U1f) Transform 

func (u U1f) Transform(transforms ...func(Transformer))

func (*U1f) Update 

func (u *U1f) Update()

type U1i 

type U1i gl.Uniform

func (U1i) Set 

func (u U1i) Set(v int)

type U2fv 

type U2fv struct {
	gl.Uniform
	// contains filtered or unexported fields
}

func (*U2fv) Set 

func (u *U2fv) Set(v f32.Vec2)

func (U2fv) Update 

func (u U2fv) Update()

type U2i 

type U2i gl.Uniform

func (U2i) Set 

func (u U2i) Set(v0, v1 int)

type U3fv 

type U3fv struct {
	gl.Uniform
	// contains filtered or unexported fields
}

func (U3fv) Set 

func (u U3fv) Set(v f32.Vec3)

func (U3fv) Update 

func (u U3fv) Update()

type U3i 

type U3i gl.Uniform

func (U3i) Set 

func (u U3i) Set(v0, v1, v2 int32)

type U4fv 

type U4fv struct {
	gl.Uniform
	// contains filtered or unexported fields
}

func (*U4fv) Animator 

func (u *U4fv) Animator(options ...func(Animator)) Animator

func (*U4fv) Set 

func (u *U4fv) Set(v f32.Vec4)

func (*U4fv) Stage 

func (u *U4fv) Stage(epoch time.Time, transforms ...func(Transformer))

func (*U4fv) Step 

func (u *U4fv) Step(now time.Time) (ok bool)

func (*U4fv) Transform 

func (u *U4fv) Transform(transforms ...func(Transformer))

func (U4fv) Update 

func (u U4fv) Update()

type U4i 

type U4i gl.Uniform

func (U4i) Set 

func (u U4i) Set(v0, v1, v2, v3 int32)

type U9fv 

type U9fv gl.Uniform

func (U9fv) Set 

func (u U9fv) Set(m f32.Mat3)

type UintBuffer 

type UintBuffer struct {
	gl.Buffer
	// contains filtered or unexported fields
}

func (*UintBuffer) Bind 

func (buf *UintBuffer) Bind()

func (*UintBuffer) Create 

func (buf *UintBuffer) Create(usage gl.Enum, data []uint32)

func (UintBuffer) Delete 

func (buf UintBuffer) Delete()

func (UintBuffer) Draw 

func (buf UintBuffer) Draw(mode gl.Enum)

func (UintBuffer) Unbind 

func (buf UintBuffer) Unbind()

func (*UintBuffer) Update 

func (buf *UintBuffer) Update(data []uint32)

type Uniform 

type Uniform interface {
	// Animator allows setting additional options.
	Animator(options ...func(Animator)) Animator

	// Stage transforms to occur the next time Step is called.
	// Previously staged transforms or animations in progress
	// are cancelled with each call.
	Stage(epoch time.Time, transforms ...func(Transformer))

	// Step through staged transforms, returning true if work
	// was performed. The first false result returned performs
	// work to animate to final destination; subsequent calls
	// do not perform any work.
	Step(now time.Time) (ok bool)

	// Transform immediately starts an animation in a separate
	// goroutine, cancelling any staged transforms or animations
	// currently in progress.
	Transform(transforms ...func(Transformer))
}

type VertAsset 

type VertAsset string

VertAsset is a filename in assets containing vertex shader source code.

func (VertAsset) Source 

func (name VertAsset) Source() VertSrc

Source returns the contents of the named file in assets or panics on error.

type VertSrc 

type VertSrc string

VertSrc is vertex shader source code.

func (VertSrc) Compile 

func (src VertSrc) Compile() (gl.Shader, error)

Compile returns the compiled shader of src and error if any.

type VertexArray 

type VertexArray struct {
	gl.Attrib
	Floats FloatBuffer
	// contains filtered or unexported fields
}

func (*VertexArray) Bind 

func (vert *VertexArray) Bind()

func (*VertexArray) Create 

func (vert *VertexArray) Create(usage gl.Enum, size int, floats []float32)

func (VertexArray) Delete 

func (vert VertexArray) Delete()

func (VertexArray) Draw 

func (vert VertexArray) Draw(mode gl.Enum)

func (VertexArray) Unbind 

func (vert VertexArray) Unbind()

func (*VertexArray) Update 

func (vert *VertexArray) Update(floats []float32)

type VertexElement 

type VertexElement struct {
	gl.Attrib
	Floats FloatBuffer
	Uints  UintBuffer
	// contains filtered or unexported fields
}

func (*VertexElement) Bind 

func (vert *VertexElement) Bind()

func (*VertexElement) Create 

func (vert *VertexElement) Create(usage gl.Enum, size int, floats []float32, uints []uint32)

func (VertexElement) Delete 

func (vert VertexElement) Delete()

func (VertexElement) Draw 

func (vert VertexElement) Draw(mode gl.Enum)

func (VertexElement) Unbind 

func (vert VertexElement) Unbind()

func (*VertexElement) Update 

func (vert *VertexElement) Update(floats []float32, uints []uint32)

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