VHTK::ScalarGradientPenetrationForceMode Class Reference
[Experimental Nodes]

This haptic mode estimates the penetration depth into object surfaces defined by the gradient in the volume. More...

Inheritance diagram for VHTK::ScalarGradientPenetrationForceMode:

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List of all members.

Public Member Functions
	ScalarGradientPenetrationForceMode ()
	Initializes the internal data.
void	getPrimitives (primitives_t &r, const state &s)
	System function.
void	initialize ()
	Initializes node functionality.
Public Attributes
auto_ptr< TSSField(H3D::SFFloat) >	threshold
	The threshold specifying for which gradient magnitude values the surface should be rendered.
auto_ptr< TSSField(H3D::SFFloat) >	stiffness
	The stiffness of the rendered surface.
Static Public Attributes
static H3D::H3DNodeDatabase	database
	X3D interface function.

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Detailed Description

This haptic mode estimates the penetration depth into object surfaces defined by the gradient in the volume.

This mode was suggested by Lawrence et. al. in "Shock and Vortex Visualization Using a Combined Visual/Haptic Interface", TVCG, 2000, as a means of generating haptic feedback from CFD data to examine shockwave structures.

Warning: this haptic mode is a dynamic force function, which means that it has its own memory. Thus, any changes of the data (translation, rotation, animation, etc) between two estimations of the force feedback will invalidate this memory and make the feedback wrong.

X3D Interface
	Name	Type	Default value	Description
	threshold	SFFloat	0.01	The threshold specifying for which gradient magnitude values the surface should be rendered.
	stiffness	SFFloat	100	The stiffness of the rendered surface.
Derived from VHTKScalarModeNode
	scalarVolume	SFScalarVolume	null
Derived from VHTKHapticModeNode
	enabled	SFBool	TRUE	Specifies if this haptic mode should be active or not

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Constructor & Destructor Documentation

VHTK::ScalarGradientPenetrationForceMode::ScalarGradientPenetrationForceMode

(

)

Initializes the internal data.

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Member Function Documentation

void VHTK::ScalarGradientPenetrationForceMode::getPrimitives	(	primitives_t &	r,
		const state &	s
	)			[virtual]

System function.

Implements VHTK::VHTKHapticModeNode.

void VHTK::ScalarGradientPenetrationForceMode::initialize

(

)

[virtual]

Initializes node functionality.

Reimplemented from VHTK::VHTKScalarModeNode.

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Member Data Documentation

H3D::H3DNodeDatabase VHTK::ScalarGradientPenetrationForceMode::database [static]

X3D interface function.

Reimplemented from VHTK::VHTKScalarModeNode.

auto_ptr<TSSField( H3D::SFFloat ) > VHTK::ScalarGradientPenetrationForceMode::stiffness

The stiffness of the rendered surface.

auto_ptr<TSSField( H3D::SFFloat ) > VHTK::ScalarGradientPenetrationForceMode::threshold

The threshold specifying for which gradient magnitude values the surface should be rendered.