PxOsdMeshTopologyValidation Class Reference

Utility to help validate an OpenSubdiv Mesh topology. More...

Classes
struct	Invalidation
	A tuple containing a code describing an invalidation and a descriptive message. More...

Public Types
enum	Code {   InvalidScheme, InvalidOrientation, InvalidTriangleSubdivision, InvalidVertexInterpolationRule,   InvalidFaceVaryingInterpolationRule, InvalidCreaseMethod, InvalidCreaseLengthElement, InvalidCreaseIndicesSize,   InvalidCreaseIndicesElement, InvalidCreaseWeightsSize, NegativeCreaseWeights, InvalidCornerIndicesElement,   NegativeCornerWeights, InvalidCornerWeightsSize, InvalidHoleIndicesElement, InvalidFaceVertexCountsElement,   InvalidFaceVertexIndicesElement, InvalidFaceVertexIndicesSize }
	Codes for various invalid states for PxOsdMeshTopology. More...
using	iterator = std::vector< Invalidation >::const_iterator
using	const_iterator = std::vector< Invalidation >::const_iterator

Public Member Functions
	PxOsdMeshTopologyValidation (PxOsdMeshTopologyValidation &&)=default
PxOsdMeshTopologyValidation &	operator= (PxOsdMeshTopologyValidation &&)=default
	PxOsdMeshTopologyValidation (PxOsdMeshTopologyValidation const &other)=default
PxOsdMeshTopologyValidation &	operator= (PxOsdMeshTopologyValidation const &other)=default
	operator bool () const
	Return true if the topology is valid. More...
const_iterator	begin () const
	Returns an iterator for the beginning of the invalidation vector if it has been initialized. More...
const_iterator	end () const
	Returns an iterator for the end of the invalidation vector if it has been initialized. More...
const_iterator	cbegin () const
	Returns an iterator for the beginning of the invalidation vector if it has been initialized. More...
const_iterator	cend () const
	Returns an iterator for the end of the invalidation vector if it has been initialized. More...

Friends
class	PxOsdMeshTopology

Detailed Description

Utility to help validate an OpenSubdiv Mesh topology.

This class is created by PxOsdMeshTopology's Validate method.

Internally, this will avoid dynamic allocations as long as the topology is valid (currently using std::unique_ptr but targeting std::optional for C++17).

This class does a set of basic validation tests on the topology of a mesh. This set of tests isn't necessarily complete. There are other cases like invalid primvar size that this will not check for.

Topology is considered valid if it passes a series of checks enumerated by the Code class enum.

\warn This doesn't currently validate that the topology of crease indices match valid edges.

Note

This class is convertable to bool and converts to true if the the topology is valid and false if any invalidations were found. That is to say, a conversion to true implies an empty invalidation vector and false implies a non-empty invalidation vector.

Definition at line 61 of file meshTopologyValidation.h.

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Class Documentation

PxOsdMeshTopologyValidation::Invalidation

struct PxOsdMeshTopologyValidation::Invalidation

A tuple containing a code describing an invalidation and a descriptive message.

Definition at line 112 of file meshTopologyValidation.h.

Class Members
Code	code
string	message

Member Enumeration Documentation

Code

enum Code

strong

Codes for various invalid states for PxOsdMeshTopology.

Enumerator
InvalidScheme	Encodes invalid scheme token value.
InvalidOrientation	Encodes invalid orientation token value.
InvalidTriangleSubdivision	Encodes invalid triangle subdivision token value.
InvalidVertexInterpolationRule	Encodes invalid vertex interpolation rule token value.
InvalidFaceVaryingInterpolationRule	Encodes invalid face varying interpolation rule token value.
InvalidCreaseMethod	Encodes invalid crease method token value.
InvalidCreaseLengthElement	Encodes crease lengths element less than 2.
InvalidCreaseIndicesSize	Encodes crease indices size not matching the sum of the lengths array.
InvalidCreaseIndicesElement	Encodes crease indices element is not in the face vertex indices vector.
InvalidCreaseWeightsSize	Encodes if crease weights is the size of the number of creases or the number of crease edges.
NegativeCreaseWeights	Encodes if crease weights are negative.
InvalidCornerIndicesElement	Encodes corner indices element is not in the face vertex indices vector.
NegativeCornerWeights	Encodes if corner weights are negative.
InvalidCornerWeightsSize	Encodes if corner weights is not the size of the number of corner indices.
InvalidHoleIndicesElement	Encodes if the hole indices are negative or greater than the maximum face index (face count - 1)
InvalidFaceVertexCountsElement	Encodes if a vertex count is less than 3.
InvalidFaceVertexIndicesElement	Encodes if the element is negative.
InvalidFaceVertexIndicesSize	Encodes if the indices size does not match the sum of the face vertex counts array.

Definition at line 65 of file meshTopologyValidation.h.

Member Function Documentation

begin()

const_iterator begin ( ) const

inline

Returns an iterator for the beginning of the invalidation vector if it has been initialized.

Otherwise, returns an empty iterator.

Definition at line 187 of file meshTopologyValidation.h.

cbegin()

const_iterator cbegin ( ) const

inline

Returns an iterator for the beginning of the invalidation vector if it has been initialized.

Otherwise, returns an empty iterator.

Definition at line 200 of file meshTopologyValidation.h.

cend()

const_iterator cend ( ) const

inline

Returns an iterator for the end of the invalidation vector if it has been initialized.

Otherwise, returns an empty iterator.

Definition at line 206 of file meshTopologyValidation.h.

end()

const_iterator end ( ) const

inline

Returns an iterator for the end of the invalidation vector if it has been initialized.

Otherwise, returns an empty iterator.

Definition at line 193 of file meshTopologyValidation.h.

operator bool()

operator bool ( ) const

inlineexplicit

Return true if the topology is valid.

Definition at line 178 of file meshTopologyValidation.h.

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

• pxr/imaging/pxOsd/meshTopologyValidation.h