vvizfnc_frag.h File Reference

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Functions
vec4	VVizOverOperator (vec4 underCol, vec4 overCol)
	Blend 2 colors using the over operator, result color is not alpha premultiplied.
float	VVizGetLuminance (VVIZ_DATATYPE data)
	Compute the luminance of a voxel value.
vec3	VVizGetNearestCoord (in VVizVoxelInfo voxelInfo)
	Returns virtual coordinates of nearest voxel center, taking in account current voxel resolution.
vec3	VVizGetNearestCoord (in VVizDataSetId dataset, in VVizVoxelInfo voxelInfo)
	Returns virtual coordinates of nearest voxel center, taking in account current voxel resolution.
vec3	VVizComputePreintegratedGradient (vec3 tcoord0, vec3 tcoord1)
	Returns the gradient at the center of the two slices.
vec3	VVizComputePreintegratedGradient (VVizDataSetId tex, vec3 tcoord0, vec3 tcoord1)
vec3	VVizComputePreintegratedGradient (VVizDataSetId tex, inout VVizVoxelInfo voxelInfoFront, in VVizVoxelInfo voxelInfoBack)
vec3	VVizComputeNormal (vec3 view, vec3 grad)
	Returns the current normal.
vec3	VVizComputeNormal (vec3 view, vec3 grad, float gradNorm)
vec3	VVizComputeNormal (vec3 tcoordVirt)
	Compute normal in surface of 2D shapes (slices, volumeGeometry, volumeSkin, hzighfield) at given coordinates.
vec3	VVizComputeNormal (in VVizDataSetId dataset, vec3 tcoordVirt)
	Compute normal in surface of 2D shapes (slices, volumeGeometry, volumeSkin, hzighfield) at given coordinates.
vec4	VVizComputeIsoMaterial (VVizDataSetId tex, in VVizVoxelInfo voxelInfoFront, in VVizVoxelInfo voxelInfoBack, int maskId)
	Returns the color of the lighted pixel belonging to the isosurface.
vec4	VVizComputePreIntegrated (VVIZ_DATATYPE sf, VVIZ_DATATYPE sb)
	Convert the volume data values (sf, sb) to a color by lookup in the pre-integrated table.
vec4	VVizComputePreIntegrated (VVIZ_DATATYPE sf, VVIZ_DATATYPE sb, int mask)
vec4	VVizComputePreIntegrated (inout VVizVoxelInfo voxelInfoFront, in VVizVoxelInfo voxelInfoBack, int mask)
vec4	VVizComputeVolumeRendering (VVIZ_DATATYPE sf)
	Returns the conversion of the volume data value sf to color by lookup in the colormap.
vec4	VVizComputeVolumeRendering (inout VVizVoxelInfo voxelInfoFront, int mask)
vec4	VVizComputeVolumeRendering (VVIZ_DATATYPE sf, int tfId)
vec2	VVizComputeDiffuseAndSpecularCoeffs (vec3 normal, float gradLength, float threshold, vec3 lightVec, vec3 halfVec, float shininess)
vec3	VVizApplySurfaceScalarInternal (vec3 baseColor, vec3 lightedColor, float gradLength)
vec3	VVizApplySurfaceScalar (vec3 baseColor, vec3 lightedColor, float gradLength)
vec4	VVizComputeVolumeRenderingLighting (in vec4 col, in vec3 normal, in float gradLength)
	Add lighting to the color col.
vec4	VVizComputeVolumeRenderingLighting (in VVizDataSetId dataset, in vec4 col, in vec3 normal, in float gradLength)
	Add lighting to the color col.
vec4	VVizComputePreintegratedLighting (in vec4 col, in vec3 normal, in float gradLength)
	Add lighting to the color col in the case of pre-integrated rendering.
vec4	VVizComputePreintegratedLighting (in VVizDataSetId dataset, in vec4 col, in vec3 normal, in float gradLength)
	Add lighting to the color col in the case of pre-integrated rendering.
vec3	VVizComputeViewVec ()
	Returns the current viewing vector in the model space of the default dataset.
vec3	VVizComputeViewVec (in VVizDataSetId dataset)
	Returns the current viewing vector in the model space of the given dataset.
bool	VVizIsOutsideTexture (in vec3 tcoord)
bool	VVizIsOutsideVolume (in vec3 tcoord)
bool	VVizIsOutsideOrOnVolumeBorder (in vec3 tcoord)
	True if tcoord is on the volume's boundary voxel or out of the volume.
bool	VVizIsOutsideOrOnVolumeBorder (in VVizDataSetId dataset, in vec3 tcoord)
	True if tcoord is on the volume's boundary voxel or out of the volume.
VVIZ_DATATYPE	VVizGetDataPhysicalLod (sampler3D tex, vec3 tcoord, float lod)
	Sample texture without converting from virtual to physical texture coords.
VVIZ_DATATYPE	VVizGetDataPhysicalLod (sampler2D tex, vec2 tcoord, float lod)
	Sample texture without converting from virtual to physical texture coords.
VVIZ_DATATYPE	VVizGetDataPhysicalLod (VVizDataSetId dataSet, vec3 tcoord, float lod)
	Sample dataset without converting from virtual to physical texture coords.
float	VVizGetProjectedDepth (in vec3 tcoord)
	Return depth in screen space (range [0, 1].
float	VVizGetProjectedDepth (in VVizDataSetId dataset, in vec3 tcoord)
	Return depth in screen space (range [0, 1].
vec2	VVizGetScreenCoord ()
	Return screen coordinates (range [0, 1]) of current fragment center.
bool	VVizIsTransparent (in float alphaValue)
	Return true if alphaValue is considered as fully transparent.
bool	VVizIsOpaque (in float alphaValue)
	Return true if alphaValue is considered as fully opaque.
vec4	VVizTextureLod (sampler3D tex, vec3 tcoord, float mipLevel)
	Helper function to fetch a texel at a specific LOD.
vec4	VVizTextureLod (sampler2D tex, vec2 tcoord, float mipLevel)
	Helper function to fetch a texel at a specific LOD.
vec4	VVizTextureLod (sampler2D tex, vec3 tcoord, float mipLevel)
	Helper function to fetch a texel at a specific LOD.
vec4	VVizGetColor (VVizDataSetId dataset, in vec3 viewVec, in vec3 rayDir, inout VVizVoxelInfo voxel, in VVizVoxelInfo previousVoxel)
void	VVizComputeGradientCommon (in vec3 tcoordFront, in vec3 tcoordBack, out vec3 gradient, out vec3 normal)
	Computes gradient and normal values at the given texture coordinates.
void	VVizComputeGradientCommon (VVizDataSetId dataset, in vec3 tcoordFront, in vec3 tcoordBack, out vec3 gradient, out vec3 normal)
	Computes gradient and normal values for the given dataset at the given texture coordinates.

Function Documentation

VVizApplySurfaceScalar()

vec3 VVizApplySurfaceScalar	(	vec3	baseColor,
		vec3	lightedColor,
		float	gradLength
	)

VVizApplySurfaceScalarInternal()

vec3 VVizApplySurfaceScalarInternal	(	vec3	baseColor,
		vec3	lightedColor,
		float	gradLength
	)

VVizComputeDiffuseAndSpecularCoeffs()

vec2 VVizComputeDiffuseAndSpecularCoeffs	(	vec3	normal,
		float	gradLength,
		float	threshold,
		vec3	lightVec,
		vec3	halfVec,
		float	shininess
	)

VVizComputeNormal()

vec3 VVizComputeNormal	(	vec3	view,
		vec3	grad,
		float	gradNorm
	)

VVizComputePreIntegrated() [1/2]

vec4 VVizComputePreIntegrated	(	inout VVizVoxelInfo	voxelInfoFront,
		in VVizVoxelInfo	voxelInfoBack,
		int	mask
	)

VVizComputePreIntegrated() [2/2]

vec4 VVizComputePreIntegrated	(	VVIZ_DATATYPE	sf,
		VVIZ_DATATYPE	sb,
		int	mask
	)

VVizComputePreintegratedGradient() [1/2]

vec3 VVizComputePreintegratedGradient	(	VVizDataSetId	tex,
		inout VVizVoxelInfo	voxelInfoFront,
		in VVizVoxelInfo	voxelInfoBack
	)

VVizComputePreintegratedGradient() [2/2]

vec3 VVizComputePreintegratedGradient	(	VVizDataSetId	tex,
		vec3	tcoord0,
		vec3	tcoord1
	)

VVizComputeVolumeRendering() [1/2]

vec4 VVizComputeVolumeRendering	(	inout VVizVoxelInfo	voxelInfoFront,
		int	mask
	)

VVizComputeVolumeRendering() [2/2]

vec4 VVizComputeVolumeRendering	(	VVIZ_DATATYPE	sf,
		int	tfId
	)

VVizGetColor()

vec4 VVizGetColor	(	VVizDataSetId	dataset,
		in vec3	viewVec,
		in vec3	rayDir,
		inout VVizVoxelInfo	voxel,
		in VVizVoxelInfo	previousVoxel
	)

VVizGetDataPhysicalLod() [1/3]

VVIZ_DATATYPE VVizGetDataPhysicalLod	(	sampler2D	tex,
		vec2	tcoord,
		float	lod
	)

Sample texture without converting from virtual to physical texture coords.

VVizGetDataPhysicalLod() [2/3]

VVIZ_DATATYPE VVizGetDataPhysicalLod	(	sampler3D	tex,
		vec3	tcoord,
		float	lod
	)

Sample texture without converting from virtual to physical texture coords.

VVizGetDataPhysicalLod() [3/3]

VVIZ_DATATYPE VVizGetDataPhysicalLod	(	VVizDataSetId	dataSet,
		vec3	tcoord,
		float	lod
	)

Sample dataset without converting from virtual to physical texture coords.

VVizGetProjectedDepth() [1/2]

float VVizGetProjectedDepth

(

in vec3

tcoord

)

Return depth in screen space (range [0, 1].

0 is nearClip, 1 is farClip) of the specified virtual space coordinate.

This method is for the default DataSet. For a specific dataset, see VVizGetProjectedDepth(in VVizDataSetId, in vec3)

VVizGetProjectedDepth() [2/2]

float VVizGetProjectedDepth	(	in VVizDataSetId	dataset,
		in vec3	tcoord
	)

Return depth in screen space (range [0, 1].

0 is nearClip, 1 is farClip) of the specified virtual space coordinate.

VVizGetScreenCoord()

vec2 VVizGetScreenCoord

(

)

Return screen coordinates (range [0, 1]) of current fragment center.

Note that if using lowResScale the center of the corresponding FULL resolution fragment is returned. This can be useful when using screen space effects (like depth peeling) to retrieve the value of the current fragment.

VVizIsOpaque()

bool VVizIsOpaque

(

in float

alphaValue

)

Return true if alphaValue is considered as fully opaque.

VVizIsOutsideOrOnVolumeBorder() [1/2]

bool VVizIsOutsideOrOnVolumeBorder

(

in vec3

tcoord

)

True if tcoord is on the volume's boundary voxel or out of the volume.

This method is for the default DataSet. For a specific dataset, see VVizIsOutsideOrOnVolumeBorder(in VVizDataSetId, in vec3)

VVizIsOutsideOrOnVolumeBorder() [2/2]

bool VVizIsOutsideOrOnVolumeBorder	(	in VVizDataSetId	dataset,
		in vec3	tcoord
	)

True if tcoord is on the volume's boundary voxel or out of the volume.

VVizIsOutsideTexture()

bool VVizIsOutsideTexture

(

in vec3

tcoord

)

VVizIsOutsideVolume()

bool VVizIsOutsideVolume

(

in vec3

tcoord

)

VVizIsTransparent()

bool VVizIsTransparent

(

in float

alphaValue

)

Return true if alphaValue is considered as fully transparent.

VVizTextureLod() [1/3]

vec4 VVizTextureLod	(	sampler2D	tex,
		vec2	tcoord,
		float	mipLevel
	)

Helper function to fetch a texel at a specific LOD.

VVizTextureLod() [2/3]

vec4 VVizTextureLod	(	sampler2D	tex,
		vec3	tcoord,
		float	mipLevel
	)

Helper function to fetch a texel at a specific LOD.

VVizTextureLod() [3/3]

vec4 VVizTextureLod	(	sampler3D	tex,
		vec3	tcoord,
		float	mipLevel
	)

Helper function to fetch a texel at a specific LOD.