Class VolumeShaders (mod)

Shaders for 3D OCT-Volume Rendering. Most fragment shaders store depth in v.n.Z, texcoords in v.n.X and v.n.Y, gradient in v.b, position in volume in v.t

Inheritance

VolumeShaders (mod)

Namespace: Visualization

Assembly: OCTVis.dll

Syntax

module VolumeShaders

Fields

val cubeBackSmp

samples the backface cube texture

Declaration

val cubeBackSmp: Sampler2d

Field Value

Type	Description
FShade.Sampler2d

val cubeFrontSmp

samples the frontface cube texture

Declaration

val cubeFrontSmp: Sampler2d

Field Value

Type	Description
FShade.Sampler2d

val eps

Declaration

val eps: float

Field Value

Type	Description
float

val fluidTexture

3D Fluid-Segmentation Sampler

Declaration

val fluidTexture: Sampler3d

Field Value

Type	Description
FShade.Sampler3d

val inf

Declaration

val inf: float

Field Value

Type	Description
float

val layerTexture

3D Layer-Segmentation Sampler

Declaration

val layerTexture: Sampler3d

Field Value

Type	Description
FShade.Sampler3d

val tfTexture

Transfer Function Sampler

Declaration

val tfTexture: Sampler2d

Field Value

Type	Description
FShade.Sampler2d

val volumeTexture

3D Volume-Texture Sampler

Declaration

val volumeTexture: Sampler3d

Field Value

Type	Description
FShade.Sampler3d

Methods

val basic: Vertex -> Expr<Vertex>

basic OCT-Volume fragment shader.

Declaration

val basic: v:Vertex -> Expr<Vertex>

Parameters

Type	Name	Description
Aardvark.Base.Rendering.Effects.Vertex	v

Returns

Type	Description
FSharp.Quotations.Expr<Aardvark.Base.Rendering.Effects.Vertex>

val calcGradients: Vertex -> Expr<Vertex>

fragment shader that computes gradients and stores them in v.b, must be used after another volume shader (MIP,BASIC). used for ENHANCED pipeline

Declaration

val calcGradients: v:Vertex -> Expr<Vertex>

Parameters

Type	Name	Description
Aardvark.Base.Rendering.Effects.Vertex	v

Returns

Type	Description
FSharp.Quotations.Expr<Aardvark.Base.Rendering.Effects.Vertex>

val classify: float -> bool -> float * V4d

classifies a given sample through a transfer function. If the photoreceptor layer was hit and draw layer = true -> the sample gets colored with a red hue.

Declaration

[<ReflectedDefinition>]
val classify: s:float -> layerHit:bool -> float * V4d

Parameters

Type	Name	Description
float	s	sample to be classified
bool	layerHit	layer segmentation hit or not

Returns

Type	Description
float * Aardvark.Base.V4d

val computeGradient: Sampler3d -> V3d -> V3d -> float -> V3d

computes the gradient at point p (not normalized)

Declaration

[<ReflectedDefinition>]
val computeGradient: smp:Sampler3d -> dims:V3d -> p:V3d -> level:float -> V3d

Parameters

Type	Name	Description
FShade.Sampler3d	smp	sampler that samples the 3D volume
Aardvark.Base.V3d	dims	dimensions of the volume in pixels
Aardvark.Base.V3d	p	point at which the gradient should be computed
float	level	sample level (mipmaps)

Returns

Type	Description
Aardvark.Base.V3d

val cubeFrag: Vertex -> Expr<Vertex>

cube texture fragment shader

Declaration

val cubeFrag: v:Vertex -> Expr<Vertex>

Parameters

Type	Name	Description
Aardvark.Base.Rendering.Effects.Vertex	v

Returns

Type	Description
FSharp.Quotations.Expr<Aardvark.Base.Rendering.Effects.Vertex>

val cubeVert: Vertex -> Expr<Vertex>

cube texture vertex shader. stores world position in color.

Declaration

val cubeVert: v:Vertex -> Expr<Vertex>

Parameters

Type	Name	Description
Aardvark.Base.Rendering.Effects.Vertex	v

Returns

Type	Description
FSharp.Quotations.Expr<Aardvark.Base.Rendering.Effects.Vertex>

val depthShading: Vertex -> Expr<Vertex>

depth shading fragment shader - gives a blue tint to farther away fragments. used in ENHANCED pipeline

Declaration

val depthShading: v:Vertex -> Expr<Vertex>

Parameters

Type	Name	Description
Aardvark.Base.Rendering.Effects.Vertex	v

Returns

Type	Description
FSharp.Quotations.Expr<Aardvark.Base.Rendering.Effects.Vertex>

val drawFluid: V3d -> V3d -> V3d -> V4d * bool

determines if the fluid segmentation should be drawn at point p. returns the color and whether the segmentation should be drawn or not.

Declaration

[<ReflectedDefinition>]
val drawFluid: p:V3d -> lightpos:V3d -> c:V3d -> V4d * bool

Parameters

Type	Name	Description
Aardvark.Base.V3d	p	point
Aardvark.Base.V3d	lightpos	light position
Aardvark.Base.V3d	c	camera location

Returns

Type	Description
Aardvark.Base.V4d * bool

val drawSlicePlane: Vertex -> Expr<Vertex>

fragment shader that draws the current 2D slice plane inside the OCT-volume

Declaration

val drawSlicePlane: v:Vertex -> Expr<Vertex>

Parameters

Type	Name	Description
Aardvark.Base.Rendering.Effects.Vertex	v

Returns

Type	Description
FSharp.Quotations.Expr<Aardvark.Base.Rendering.Effects.Vertex>

val enhancedPipelineFull: Vertex -> Expr<Vertex>

fragment shader implementing the approach by Viehland et al. users can set voxel transparency and toggle layer segmentation drawing

Declaration

val enhancedPipelineFull: v:Vertex -> Expr<Vertex>

Parameters

Type	Name	Description
Aardvark.Base.Rendering.Effects.Vertex	v

Returns

Type	Description
FSharp.Quotations.Expr<Aardvark.Base.Rendering.Effects.Vertex>

val enhanceEdges: Vertex -> Expr<Vertex>

fragment shader that enhances edges (based on gradients). used in ENHANCED pipeline.

Declaration

val enhanceEdges: v:Vertex -> Expr<Vertex>

Parameters

Type	Name	Description
Aardvark.Base.Rendering.Effects.Vertex	v

Returns

Type	Description
FSharp.Quotations.Expr<Aardvark.Base.Rendering.Effects.Vertex>

val enhanceFeatures: Vertex -> Expr<Vertex>

fragment shader that enhances features (based on gradients and view direction). used in ENHANCED pipeline.

Declaration

val enhanceFeatures: v:Vertex -> Expr<Vertex>

Parameters

Type	Name	Description
Aardvark.Base.Rendering.Effects.Vertex	v

Returns

Type	Description
FSharp.Quotations.Expr<Aardvark.Base.Rendering.Effects.Vertex>

val enhanceSample: float -> float

enhances a given sample

Declaration

[<ReflectedDefinition>]
val enhanceSample: s:float -> float

Parameters

Type	Name	Description
float	s	sample to be enhanced

Returns

Type	Description
float

val firstGrad: Vertex -> Expr<Vertex>

fragment shader that draws the OCT-Volume using first-hit and phong shading

Declaration

val firstGrad: v:Vertex -> Expr<Vertex>

Parameters

Type	Name	Description
Aardvark.Base.Rendering.Effects.Vertex	v

Returns

Type	Description
FSharp.Quotations.Expr<Aardvark.Base.Rendering.Effects.Vertex>

val fluid: Vertex -> Expr<Vertex>

fragment shader that draws the fluid segmentation

Declaration

val fluid: v:Vertex -> Expr<Vertex>

Parameters

Type	Name	Description
Aardvark.Base.Rendering.Effects.Vertex	v

Returns

Type	Description
FSharp.Quotations.Expr<Aardvark.Base.Rendering.Effects.Vertex>

val mip: Vertex -> Expr<Vertex>

maximum intensity projection shader for 3D volume rendering

Declaration

val mip: v:Vertex -> Expr<Vertex>

Parameters

Type	Name	Description
Aardvark.Base.Rendering.Effects.Vertex	v

Returns

Type	Description
FSharp.Quotations.Expr<Aardvark.Base.Rendering.Effects.Vertex>

val phong: Sampler3d -> float -> V3d -> V3d -> V3d -> V3d -> float -> V4d

computes phong shading at point p

Declaration

[<ReflectedDefinition>]
val phong: smp:Sampler3d -> s:float -> dims:V3d -> p:V3d -> lightpos:V3d -> vp:V3d -> level:float -> V4d

Parameters

Type	Name	Description
FShade.Sampler3d	smp	sampler that samples the 3D volume
float	s	sample at location p
Aardvark.Base.V3d	dims	dimensions of the volume in pixels
Aardvark.Base.V3d	p	point at which shading should be computed
Aardvark.Base.V3d	lightpos	light position
Aardvark.Base.V3d	vp	viewpoint
float	level	sample level fro gradient (mipmaps)

Returns

Type	Description
Aardvark.Base.V4d

val phong2: Sampler3d -> V4d -> V3d -> V3d -> V3d -> V3d -> float -> float -> V4d

computes phong shading at point p. needs pre-computed normal

Declaration

[<ReflectedDefinition>]
val phong2: smp:Sampler3d -> s:V4d -> p:V3d -> n:V3d -> lightpos:V3d -> vp:V3d -> specExp:float -> specIntens:float -> V4d

Parameters

Type	Name	Description
FShade.Sampler3d	smp	sampler that samples the 3D volume
Aardvark.Base.V4d	s	color at location p
Aardvark.Base.V3d	p	point at which shading should be computed
Aardvark.Base.V3d	n	normal vector at point p (normalized)
Aardvark.Base.V3d	lightpos	light position
Aardvark.Base.V3d	vp	viewpoint
float	specExp	specular exponent
float	specIntens	specular intensity

Returns

Type	Description
Aardvark.Base.V4d

val phongShading: Vertex -> Expr<Vertex>

phong shading fragment shader. used in ENHANCED pipeline

Declaration

val phongShading: v:Vertex -> Expr<Vertex>

Parameters

Type	Name	Description
Aardvark.Base.Rendering.Effects.Vertex	v

Returns

Type	Description
FSharp.Quotations.Expr<Aardvark.Base.Rendering.Effects.Vertex>