VertexTransform Class Reference

This is an abstract base class that holds a pointer to some transform, computed in some arbitrary way, that is to be applied to vertices during rendering. More...

#include "vertexTransform.h"

Inheritance diagram for VertexTransform:

List of all members.

Classes
class	CData
Public Member Functions
virtual void	accumulate_matrix (LMatrix4 &accum, PN_stdfloat weight) const
	Adds the value of this transform's matrix, modified by the indicated weight, into the indicated accumulation matrix.
virtual TypeHandle	force_init_type ()
virtual void	get_matrix (LMatrix4 &matrix) const =0
UpdateSeq	get_modified (Thread *current_thread) const
	Returns a sequence number that's guaranteed to change at least every time the value reported by get_matrix() changes.
virtual TypeHandle	get_type () const
virtual void	mult_matrix (LMatrix4 &result, const LMatrix4 &previous) const
	Premultiplies this transform's matrix with the indicated previous matrix, so that the result is the net composition of the given transform with this transform.
virtual void	output (ostream &out) const
virtual void	write (ostream &out, int indent_level) const
virtual void	write_datagram (BamWriter *manager, Datagram &dg)
	Writes the contents of this object to the datagram for shipping out to a Bam file.
Static Public Member Functions
static TypeHandle	get_class_type ()
static UpdateSeq	get_global_modified (Thread *current_thread)
	Returns the currently highest VertexTransform::get_modified() value in the world.
static UpdateSeq	get_next_modified (Thread *current_thread)
	Returns a monotonically increasing sequence.
static void	init_type ()
Protected Member Functions
void	fillin (DatagramIterator &scan, BamReader *manager)
	This internal function is called by make_from_bam to read in all of the relevant data from the BamFile for the new VertexTransform.
void	mark_modified (Thread *current_thread)
	Intended to be called by a derived class whenever the reported transform might have changed.
Friends
class	TransformTable

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Detailed Description

This is an abstract base class that holds a pointer to some transform, computed in some arbitrary way, that is to be applied to vertices during rendering.

This is used to implement soft-skinned and animated vertices. Derived classes will define how the transform is actually computed.

Definition at line 39 of file vertexTransform.h.

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Member Function Documentation

void VertexTransform::accumulate_matrix	(	LMatrix4 &	accum,
		PN_stdfloat	weight
	)		const [virtual]

Adds the value of this transform's matrix, modified by the indicated weight, into the indicated accumulation matrix.

This is used to compute the result of several blended transforms.

Reimplemented in JointVertexTransform.

Definition at line 74 of file vertexTransform.cxx.

References LMatrix4f::accumulate().

void VertexTransform::fillin	(	DatagramIterator &	scan,
		BamReader *	manager
	)		[protected, virtual]

This internal function is called by make_from_bam to read in all of the relevant data from the BamFile for the new VertexTransform.

Reimplemented from TypedWritable.

Reimplemented in JointVertexTransform, and UserVertexTransform.

Definition at line 165 of file vertexTransform.cxx.

UpdateSeq VertexTransform::get_global_modified

(

Thread *

current_thread

)

[inline, static]

Returns the currently highest VertexTransform::get_modified() value in the world.

This can be used as a quick way to determine if any VertexTransforms have changed value recently.

Definition at line 38 of file vertexTransform.I.

Referenced by TransformBlendTable::get_modified(), TransformBlend::get_modified(), and TransformBlend::update_blend().

UpdateSeq VertexTransform::get_modified

(

Thread *

current_thread

)

const [inline]

Returns a sequence number that's guaranteed to change at least every time the value reported by get_matrix() changes.

Definition at line 24 of file vertexTransform.I.

UpdateSeq VertexTransform::get_next_modified

(

Thread *

current_thread

)

[static]

Returns a monotonically increasing sequence.

Each time this is called, a new sequence number is returned, higher than the previous value.

This is used to ensure that all VertexTransform::get_modified() calls return an increasing number in the same space, so that TransformBlend::get_modified() is easy to determine. It is similar to Geom::get_modified(), but it is in a different space.

Definition at line 119 of file vertexTransform.cxx.

Referenced by mark_modified(), and VertexSlider::mark_modified().

void VertexTransform::mark_modified

(

Thread *

current_thread

)

[protected]

Intended to be called by a derived class whenever the reported transform might have changed.

Without calling this method, changes to get_matrix() may not be propagated through the system.

Definition at line 136 of file vertexTransform.cxx.

References ordered_vector< Key, Compare >::begin(), ordered_vector< Key, Compare >::end(), and get_next_modified().

Referenced by JointVertexTransform::fillin(), JointVertexTransform::JointVertexTransform(), and UserVertexTransform::set_matrix().

void VertexTransform::mult_matrix	(	LMatrix4 &	result,
		const LMatrix4 &	previous
	)		const [virtual]

Premultiplies this transform's matrix with the indicated previous matrix, so that the result is the net composition of the given transform with this transform.

The result is stored in the parameter "result", which should not be the same matrix as previous.

Reimplemented in JointVertexTransform.

Definition at line 58 of file vertexTransform.cxx.

Referenced by DXGraphicsStateGuardian9::begin_draw_primitives(), and DXGraphicsStateGuardian8::begin_draw_primitives().

void VertexTransform::write_datagram	(	BamWriter *	manager,
		Datagram &	dg
	)		[virtual]

Writes the contents of this object to the datagram for shipping out to a Bam file.

Reimplemented from TypedWritable.

Reimplemented in JointVertexTransform, and UserVertexTransform.

Definition at line 153 of file vertexTransform.cxx.

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

• panda/src/gobj/vertexTransform.h
• panda/src/gobj/vertexTransform.cxx
• panda/src/gobj/vertexTransform.I