SoLocalBBoxMatrixElement Class Reference
[Elements]

Stores the transformation matrix from object space to some local coordinate space during application of an SoGetBoundingBoxAction. More...

#include <Inventor/elements/SoLocalBBoxMatrixElement.h>

Inheritance diagram for SoLocalBBoxMatrixElement:

List of all members.

Public Member Functions
virtual void	push (SoState *state)
virtual void	print (FILE *fp) const
Static Public Member Functions
static SoType	getClassTypeId ()
static int	getClassStackIndex ()
static void	makeIdentity (SoState *state)
static void	set (SoState *state, const SbMatrix &matrix)
static void	mult (SoState *state, const SbMatrix &matrix)
static void	translateBy (SoState *state, const SbVec3f &translation)
static void	rotateBy (SoState *state, const SbRotation &rotation)
static void	scaleBy (SoState *state, const SbVec3f &scaleFactor)
static SbMatrix	pushMatrix (SoState *state)
static void	popMatrix (SoState *state, const SbMatrix &m)
static void	resetAll (SoState *state)
static const SbMatrix &	get (SoState *state)

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Detailed Description

Stores the transformation matrix from object space to some local coordinate space during application of an SoGetBoundingBoxAction.

This element stores the transformation matrix from object space to some local coordinate space during application of an SoGetBoundingBoxAction. This element is needed to allow separators (and other caching nodes) to store cached bounding boxes in their own local space. Shapes that extend the current bounding box computed by the action use this matrix to transform the bounding box into local space. Separators cache this box, then transform it into the next local space up the hierarchy.

Because this element is set to identity by separators before traversing their children, it can never have an affect on any caching separator that it is not under. Therefore, it should never be tested for cache invalidation, so its matches() method prints an error message and returns FALSE. It also means that it does not have to save node id's so there are no nodes passed in to any of the methods.

SEE ALSO

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Member Function Documentation

static const SbMatrix& SoLocalBBoxMatrixElement::get

(

SoState *

state

)

[static]

Returns current matrix from the state.

static int SoLocalBBoxMatrixElement::getClassStackIndex

(

)

[static]

Returns the stack id for this element.

Reimplemented from SoElement.

static SoType SoLocalBBoxMatrixElement::getClassTypeId

(

)

[static]

Returns the type identifier for this class.

Reimplemented from SoElement.

static void SoLocalBBoxMatrixElement::makeIdentity

(

SoState *

state

)

[static]

Sets the local matrix to the identity matrix.

static void SoLocalBBoxMatrixElement::mult	(	SoState *	state,
		const SbMatrix &	matrix
	)			[static]

Multiplies the given matrix into the local matrix.

static void SoLocalBBoxMatrixElement::popMatrix	(	SoState *	state,
		const SbMatrix &	m
	)			[static]

This method is used by the TransformSeparator node.

virtual void SoLocalBBoxMatrixElement::print

(

FILE *

fp

)

const [virtual]

Prints element (for debugging).

Reimplemented from SoElement.

virtual void SoLocalBBoxMatrixElement::push

(

SoState *

state

)

[virtual]

Overrides push() method to copy values from next instance in the stack.

Reimplemented from SoElement.

static SbMatrix SoLocalBBoxMatrixElement::pushMatrix

(

SoState *

state

)

[static]

This method is used by the TransformSeparator node.

static void SoLocalBBoxMatrixElement::resetAll

(

SoState *

state

)

[static]

Resets all current instances in the state to identity.

static void SoLocalBBoxMatrixElement::rotateBy	(	SoState *	state,
		const SbRotation &	rotation
	)			[static]

Multiplies a matrix that performs the specified transformation into the local matrix.

static void SoLocalBBoxMatrixElement::scaleBy	(	SoState *	state,
		const SbVec3f &	scaleFactor
	)			[static]

Multiplies a matrix that performs the specified transformation into the local matrix.

static void SoLocalBBoxMatrixElement::set	(	SoState *	state,
		const SbMatrix &	matrix
	)			[static]

Sets the local matrix to the given matrix.

static void SoLocalBBoxMatrixElement::translateBy	(	SoState *	state,
		const SbVec3f &	translation
	)			[static]

Multiplies a matrix that performs the specified transformation into the local matrix.

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The documentation for this class was generated from the following file:

• Inventor/elements/SoLocalBBoxMatrixElement.h