Panda3D
Public Member Functions | Static Public Member Functions | 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. This is used to implement soft-skinned and animated vertices. Derived classes will define how the transform is actually computed. More...

Inheritance diagram for VertexTransform:
TypedWritableReferenceCount TypedWritable ReferenceCount TypedObject MemoryBase MemoryBase 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. This is used to compute the result of several blended transforms. 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. The result is stored in the parameter "result", which should not be the same matrix as previous. More...
 
 output (Ostream out)
 
 write (Ostream out, int indent_level)
 
- Public Member Functions inherited from TypedWritable
object __reduce__ ()
 
object __reduce_persist__ (object pickler)
 
str encodeToBamStream ()
 Converts the TypedWritable object into a single stream of data using a BamWriter, and returns that data as a string string. Returns empty string on failure. More...
 
bool encodeToBamStream (String data, BamWriter writer)
 Converts the TypedWritable object into a single stream of data using a BamWriter, and stores that data in the indicated string. Returns true on success, false on failure. More...
 
UpdateSeq getBamModified ()
 Returns the current bam_modified counter. This counter is normally incremented automatically whenever the object is modified. More...
 
 markBamModified ()
 Increments the bam_modified counter, so that this object will be invalidated and retransmitted on any open bam streams. This should normally not need to be called by user code; it should be called internally when the object has been changed in a way that legitimately requires its retransmission to any connected clients. More...
 
- Public Member Functions inherited from TypedObject
TypeHandle getType ()
 Derived classes should override this function to return get_class_type(). More...
 
int getTypeIndex ()
 Returns the internal index number associated with this object's TypeHandle, a unique number for each different type. This is equivalent to get_type().get_index(). 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. User code should avoid using ref() and unref() directly, which can result in missed reference counts. Instead, let a PointerTo object manage the reference counting automatically. More...
 
bool testRefCountIntegrity ()
 Does some easy checks to make sure that the reference count isn't completely bogus. Returns true if ok, false otherwise. More...
 
bool testRefCountNonzero ()
 Does some easy checks to make sure that the reference count isn't zero, or completely bogus. Returns true if ok, false otherwise. More...
 
bool unref ()
 Explicitly decrements the reference count. Note that the object will not be implicitly deleted by unref() simply because the reference count drops to zero. (Having a member function delete itself is problematic.) However, see the helper function unref_delete(). 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. This can be used as a quick way to determine if any VertexTransforms have changed value recently. More...
 
static UpdateSeq getNextModified (Thread current_thread)
 Returns a monotonically increasing sequence. Each time this is called, a new sequence number is returned, higher than the previous value. More...
 
- Static Public Member Functions inherited from TypedWritableReferenceCount
static TypedWritableReferenceCount decodeFromBamStream (str data, BamReader reader)
 Reads the string created by a previous call to encode_to_bam_stream(), and extracts and returns the single object on that string. Returns NULL on error. 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 ()
 

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 
)