SoModelMatrixElement Class Reference
[Elements]

Stores the current model matrix. More...

#include <Inventor/elements/SoModelMatrixElement.h>

Inheritance diagram for SoModelMatrixElement:

List of all members.

Classes
struct	Flags
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, SoNode *node)
static void	set (SoState *state, SoNode *node, const SbMatrix &matrix, SbBool sendToGL=TRUE)
static void	mult (SoState *state, SoNode *node, const SbMatrix &matrix)
static void	translateBy (SoState *state, SoNode *node, const SbVec3f &translation)
static void	rotateBy (SoState *state, SoNode *node, const SbRotation &rotation)
static void	scaleBy (SoState *state, SoNode *node, const SbVec3f &scaleFactor)
static SbMatrix	pushMatrix (SoState *state)
static void	popMatrix (SoState *state, const SbMatrix &m)
static void	setCullMatrix (SoState *state, SoNode *node, const SbMatrix &matrix)
static const SbMatrix &	getCombinedCullMatrix (SoState *state)
static const SbMatrix &	get (SoState *state)
static const SbMatrix &	get (SoState *state, SbBool &isIdent)
Friends
class	SoLocalBBoxMatrixElement

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Detailed Description

Stores the current model matrix.

This element stores the current model matrix - the cumulative transformation applied to subsequent shapes. Because the matrix is cumulative, this class is derived from SoAccumulatedElement. The set() method replaces the current matrix, while all the others (mult(), translateBy(), etc.) multiply into it. Node id's of the nodes that affect the element are accumulated properly.

This element also stores the current view-volume culling transformation, which is normally the view*projection matrices (set by cameras), but which may be modified by sophisticated culling schemes.

SEE ALSO

SoMatrixTransform, SoRotation, SoRotationXYZ, SoScale, SoTransform, SoTranslation, SoUnits

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Member Function Documentation

static const SbMatrix& SoModelMatrixElement::get	(	SoState *	state,
		SbBool &	isIdent
	)			[static]

Returns current model matrix from the state, sets given flag to TRUE if matrix is known to be identity.

static const SbMatrix& SoModelMatrixElement::get

(

SoState *

state

)

[static]

Returns current model matrix from the state.

static int SoModelMatrixElement::getClassStackIndex

(

)

[static]

Returns the stack id for this element.

Reimplemented from SoAccumulatedElement.

Reimplemented in SoBBoxModelMatrixElement, and SoModelScaleElement.

static SoType SoModelMatrixElement::getClassTypeId

(

)

[static]

Returns the type identifier for this class.

Reimplemented from SoAccumulatedElement.

Reimplemented in SoBBoxModelMatrixElement, and SoModelScaleElement.

static const SbMatrix& SoModelMatrixElement::getCombinedCullMatrix

(

SoState *

state

)

[static]

This method gets the model*cullMatrix combined matrix (which is cached by this element).

static void SoModelMatrixElement::makeIdentity	(	SoState *	state,
		SoNode *	node
	)			[static]

Sets the model matrix to the identity matrix.

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

Multiplies the given matrix into the model matrix.

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

This method is used by the TransformSeparator node.

WARNING! For proper caching behavior, the matrix returned by pushMatrix() must be used ONLY as a later argument to popMatrix(), and you must NOT modify the matrix between the push and the pop. If you need the matrix for any other reason, you MUST use the get() routine.

virtual void SoModelMatrixElement::print

(

FILE *

fp

)

const [virtual]

Prints element (for debugging).

Reimplemented from SoAccumulatedElement.

virtual void SoModelMatrixElement::push

(

SoState *

state

)

[virtual]

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

Reimplemented from SoAccumulatedElement.

Reimplemented in SoBBoxModelMatrixElement.

static SbMatrix SoModelMatrixElement::pushMatrix

(

SoState *

state

)

[static]

This method is used by the TransformSeparator node.

WARNING! For proper caching behavior, the matrix returned by pushMatrix() must be used ONLY as a later argument to popMatrix(), and you must NOT modify the matrix between the push and the pop. If you need the matrix for any other reason, you MUST use the get() routine.

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

This multiplies a matrix that performs the specified transformation into the model matrix.

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

This multiplies a matrix that performs the specified transformation into the model matrix.

static void SoModelMatrixElement::set	(	SoState *	state,
		SoNode *	node,
		const SbMatrix &	matrix,
		SbBool	sendToGL = TRUE
	)			[static]

Sets the model matrix to the given matrix.

This method will (indirectly) call glLoadMatrix with the new matrix unless the 'sendToGL' parameter is explicitly FALSE.

static void SoModelMatrixElement::setCullMatrix	(	SoState *	state,
		SoNode *	node,
		const SbMatrix &	matrix
	)			[static]

Sets the transformation that defines the volume that view-volume culling should be tested against.

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

This multiplies a matrix that performs the specified transformation into the model matrix.

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Friends And Related Function Documentation

friend class SoLocalBBoxMatrixElement [friend]

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

• Inventor/elements/SoModelMatrixElement.h