Panda3D
Public Member Functions | Static Public Member Functions | Public Attributes | List of all members
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...

Inheritance diagram for VertexTransform:
TypedWritableReferenceCount TypedWritable ReferenceCount TypedObject JointVertexTransform NodeVertexTransform UserVertexTransform

Public Member Functions

 accumulateMatrix (LMatrix4 accum, float weight)
 Adds the value of this transform's matrix, modified by the indicated weight, into the indicated accumulation matrix. More...
 
 getMatrix (LMatrix4 matrix)
 
UpdateSeq getModified (Thread current_thread)
 Returns a sequence number that's guaranteed to change at least every time the value reported by get_matrix() changes. More...
 
 multMatrix (LMatrix4 result, const LMatrix4 previous)
 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. More...
 
 output (Ostream out)
 
 write (Ostream out, int indent_level)
 
- Public Member Functions inherited from TypedWritable
object __reduce__ ()
 
object __reduce_persist__ (object pickler)
 
VectorUchar encodeToBamStream ()
 Converts the TypedWritable object into a single stream of data using a BamWriter, and returns that data as a bytes object. More...
 
bool encodeToBamStream (VectorUchar data, BamWriter writer)
 Converts the TypedWritable object into a single stream of data using a BamWriter, and stores that data in the indicated string. More...
 
 fillin (DatagramIterator scan, BamReader manager)
 This internal function is intended to be called by each class's make_from_bam() method to read in all of the relevant data from the BamFile for the new object. More...
 
UpdateSeq getBamModified ()
 Returns the current bam_modified counter. More...
 
 markBamModified ()
 Increments the bam_modified counter, so that this object will be invalidated and retransmitted on any open bam streams. More...
 
- Public Member Functions inherited from TypedObject
TypeHandle getType ()
 
int getTypeIndex ()
 Returns the internal index number associated with this object's TypeHandle, a unique number for each different type. More...
 
bool isExactType (TypeHandle handle)
 Returns true if the current object is the indicated type exactly. More...
 
bool isOfType (TypeHandle handle)
 Returns true if the current object is or derives from the indicated type. More...
 
- Public Member Functions inherited from ReferenceCount
int getRefCount ()
 Returns the current reference count. More...
 
 ref ()
 Explicitly increments the reference count. More...
 
bool testRefCountIntegrity ()
 Does some easy checks to make sure that the reference count isn't completely bogus. More...
 
bool testRefCountNonzero ()
 Does some easy checks to make sure that the reference count isn't zero, or completely bogus. More...
 
bool unref ()
 Explicitly decrements the reference count. More...
 

Static Public Member Functions

static TypeHandle getClassType ()
 
static UpdateSeq getGlobalModified (Thread current_thread)
 Returns the currently highest VertexTransform::get_modified() value in the world. More...
 
static UpdateSeq getNextModified (Thread current_thread)
 Returns a monotonically increasing sequence. More...
 
- Static Public Member Functions inherited from TypedWritableReferenceCount
static TypedWritableReferenceCount decodeFromBamStream (VectorUchar data, BamReader reader)
 Reads the bytes created by a previous call to encode_to_bam_stream(), and extracts and returns the single object on those bytes. More...
 
static TypeHandle getClassType ()
 
- Static Public Member Functions inherited from TypedWritable
static TypeHandle getClassType ()
 
- Static Public Member Functions inherited from TypedObject
static TypeHandle getClassType ()
 
- Static Public Member Functions inherited from ReferenceCount
static TypeHandle getClassType ()
 

Public Attributes

UpdateSeq modified
 Returns a sequence number that's guaranteed to change at least every time the value reported by get_matrix() changes. More...
 
- Public Attributes inherited from TypedObject
TypeHandle type
 Returns the TypeHandle representing this object's type. More...
 
- Public Attributes inherited from ReferenceCount
int ref_count
 The current reference count. More...
 

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.

Member Function Documentation

◆ accumulateMatrix()

accumulateMatrix ( LMatrix4  accum,
float  weight 
)

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.

◆ getClassType()

static TypeHandle getClassType ( )
static

◆ getGlobalModified()

static UpdateSeq getGlobalModified ( Thread  current_thread)
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.

◆ getMatrix()

getMatrix ( LMatrix4  matrix)

◆ getModified()

UpdateSeq getModified ( Thread  current_thread)

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

◆ getNextModified()

static UpdateSeq getNextModified ( 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.

◆ multMatrix()

multMatrix ( LMatrix4  result,
const LMatrix4  previous 
)

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.

◆ output()

output ( Ostream  out)

◆ write()

write ( Ostream  out,
int  indent_level 
)

Member Data Documentation

◆ modified

UpdateSeq modified

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