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TopologyRefinerFactory< MESH > Class Template Reference

Factory for constructing TopologyRefiners from specific mesh classes. More...

`#include <topologyRefinerFactory.h>`

Inheritance diagram for TopologyRefinerFactory< MESH >:

## Classes

struct | Options
| Options related to the construction of each TopologyRefiner. More...

## Static Public Member Functions

static TopologyRefiner * | Create (MESH const &mesh, Options options=Options())
| Instantiates a TopologyRefiner from client-provided topological representation.
static TopologyRefiner * | Create (TopologyRefiner const &baseLevel)
| Instantiates a TopologyRefiner from the base level of an existing instance.

## Protected Types

typedef Vtr::internal::Level::TopologyError | TopologyError
Protected Types inherited from TopologyRefinerFactoryBase
typedef Vtr::internal::Level::ValidationCallback | TopologyCallback

## Static Protected Member Functions

Methods to be provided to complete assembly of the TopologyRefiner

These methods are to be specialized to implement all details specific to class MESH required to convert MESH data to TopologyRefiner. Note that some of these must be specialized in order to complete construction while some are optional.

There are two minimal construction requirements (to specify the size and content of all topology relations) and three optional (to specify feature tags, face-varying data, and runtime validation and error reporting).

See comments in the generic stubs, the factory for Far::TopologyDescriptor or the tutorials for more details on writing these.

static bool | resizeComponentTopology (TopologyRefiner &newRefiner, MESH const &mesh)
| Specify the number of vertices, faces, face-vertices, etc.
static bool | assignComponentTopology (TopologyRefiner &newRefiner, MESH const &mesh)
| Specify the relationships between vertices, faces, etc. ie the face-vertices, vertex-faces, edge-vertices, etc.
static bool | assignComponentTags (TopologyRefiner &newRefiner, MESH const &mesh)
| (Optional) Specify edge or vertex sharpness or face holes
static bool | assignFaceVaryingTopology (TopologyRefiner &newRefiner, MESH const &mesh)
| (Optional) Specify face-varying data per face
static void | reportInvalidTopology (TopologyError errCode, char const *msg, MESH const &mesh)
| (Optional) Control run-time topology validation and error reporting
Base level assembly methods to be used within resizeComponentTopology()

These methods specify sizes of various quantities, e.g. the number of vertices, faces, face-vertices, etc. The number of the primary components (vertices, faces and edges) should be specified prior to anything else that references them (e.g. we need to know the number of faces before specifying the vertices for that face.

If a full boundary representation with all neighborhood information is not available, e.g. faces and vertices are available but not edges, only the face-vertices should be specified. The remaining topological relationships will be constructed later in the assembly (though at greater cost than if specified directly).

The sizes for topological relationships between individual components should be specified in order, i.e. the number of face-vertices for each successive face.

static void | setNumBaseVertices (TopologyRefiner &newRefiner, int count)
| Specify the number of vertices to be accommodated.
static void | setNumBaseFaces (TopologyRefiner &newRefiner, int count)
| Specify the number of faces to be accommodated.
static void | setNumBaseEdges (TopologyRefiner &newRefiner, int count)
| Specify the number of edges to be accommodated.
static void | setNumBaseFaceVertices (TopologyRefiner &newRefiner, Index f, int count)
| Specify the number of vertices incident each face.
static void | setNumBaseEdgeFaces (TopologyRefiner &newRefiner, Index e, int count)
| Specify the number of faces incident each edge.
static void | setNumBaseVertexFaces (TopologyRefiner &newRefiner, Index v, int count)
| Specify the number of faces incident each vertex.
static void | setNumBaseVertexEdges (TopologyRefiner &newRefiner, Index v, int count)
| Specify the number of edges incident each vertex.
static int | getNumBaseVertices (TopologyRefiner const &newRefiner)
static int | getNumBaseFaces (TopologyRefiner const &newRefiner)
static int | getNumBaseEdges (TopologyRefiner const &newRefiner)
Base level assembly methods to be used within assignComponentTopology()

These methods populate relationships between components – in much the same manner as they are inspected once the TopologyRefiner is completed.

An array of fixed size is returned from these methods and its entries are to be populated with the appropriate indices for its neighbors. At minimum, the vertices for each face must be specified. As noted previously, the remaining relationships will be constructed as needed.

The ordering of entries in these arrays is important – they are expected to be ordered counter-clockwise for a right-hand orientation.

Non-manifold components must be explicitly tagged as such and they do not require the ordering expected of manifold components. Special consideration must also be given to certain non-manifold situations, e.g. the same edge cannot appear twice in a face, and a degenerate edge (same vertex at both ends) can only have one incident face. Such considerations are typically achievable by creating multiple instances of an edge. So while there will always be a one-to-one correspondence between vertices and faces, the same is not guaranteed of edges in certain non-manifold circumstances.

static IndexArray | getBaseFaceVertices (TopologyRefiner &newRefiner, Index f)
| Assign the vertices incident each face.
static IndexArray | getBaseFaceEdges (TopologyRefiner &newRefiner, Index f)
| Assign the edges incident each face.
static IndexArray | getBaseEdgeVertices (TopologyRefiner &newRefiner, Index e)
| Assign the vertices incident each edge.
static IndexArray | getBaseEdgeFaces (TopologyRefiner &newRefiner, Index e)
| Assign the faces incident each edge.
static IndexArray | getBaseVertexFaces (TopologyRefiner &newRefiner, Index v)
| Assign the faces incident each vertex.
static IndexArray | getBaseVertexEdges (TopologyRefiner &newRefiner, Index v)
| Assign the edges incident each vertex.
static LocalIndexArray | getBaseVertexFaceLocalIndices (TopologyRefiner &newRefiner, Index v)
| Assign the local indices of a vertex within each of its incident faces.
static LocalIndexArray | getBaseVertexEdgeLocalIndices (TopologyRefiner &newRefiner, Index v)
| Assign the local indices of a vertex within each of its incident edges.
static LocalIndexArray | getBaseEdgeFaceLocalIndices (TopologyRefiner &newRefiner, Index e)
| Assign the local indices of an edge within each of its incident faces.
static void | populateBaseLocalIndices (TopologyRefiner &newRefiner)
| Determine all local indices by inspection (only for pure manifold meshes)
static void | setBaseEdgeNonManifold (TopologyRefiner &newRefiner, Index e, bool b)
| Tag an edge as non-manifold.
static void | setBaseVertexNonManifold (TopologyRefiner &newRefiner, Index v, bool b)
| Tag a vertex as non-manifold.
Base level assembly methods to be used within assignComponentTags()
These methods are used to assign edge or vertex sharpness, for tagging faces as holes, etc. Unlike topological assignment, only those components that possess a feature of interest need be explicitly assigned. Since topological construction is largely complete by this point, a method is available to identify an edge for sharpness assignment given a pair of vertices.
static Index | findBaseEdge (TopologyRefiner const &newRefiner, Index v0, Index v1)
| Identify an edge to be assigned a sharpness value given a vertex pair.
static void | setBaseEdgeSharpness (TopologyRefiner &newRefiner, Index e, float sharpness)
| Assign a sharpness value to a given edge.
static void | setBaseVertexSharpness (TopologyRefiner &newRefiner, Index v, float sharpness)
| Assign a sharpness value to a given vertex.
static void | setBaseFaceHole (TopologyRefiner &newRefiner, Index f, bool isHole)
| Tag a face as a hole.
Base level assembly methods to be used within assignFaceVaryingTopology()
Face-varying data is assigned to faces in much the same way as face-vertex topology is assigned – indices for face-varying values are assigned to the corners of each face just as indices for vertices were assigned. Independent sets of face-varying data are stored in channels. The identifier of each channel (an integer) is expected whenever referring to face-varying data in any form.
static int | createBaseFVarChannel (TopologyRefiner &newRefiner, int numValues)
| Create a new face-varying channel with the given number of values.
static int | createBaseFVarChannel (TopologyRefiner &newRefiner, int numValues, Sdc::Options const &fvarOptions)
| Create a new face-varying channel with the given number of values and independent interpolation options.
static IndexArray | getBaseFaceFVarValues (TopologyRefiner &newRefiner, Index face, int channel=0)
| Assign the face-varying values for the corners of each face.
static bool | populateBaseLevel (TopologyRefiner &refiner, MESH const &mesh, Options options)
Static Protected Member Functions inherited from TopologyRefinerFactoryBase
static bool | prepareComponentTopologySizing (TopologyRefiner &refiner)
static bool | prepareComponentTopologyAssignment (TopologyRefiner &refiner, bool fullValidation, TopologyCallback callback, void const *callbackData)
static bool | prepareComponentTagsAndSharpness (TopologyRefiner &refiner)
static bool | prepareFaceVaryingChannels (TopologyRefiner &refiner)

## Detailed Description

template<class MESH>
class OpenSubdiv::OPENSUBDIV_VERSION::Far::TopologyRefinerFactory< MESH >

Factory for constructing TopologyRefiners from specific mesh classes.

TopologyRefinerFactory<MESH> is the factory class template to convert an instance of TopologyRefiner from an arbitrary mesh class. While a class template, the implementation is not (cannot) be complete, so specialization of a few methods is required (it is a stateless factory, so no instance and only static methods).

This template provides both the interface and high level assembly for the construction of the TopologyRefiner instance. The high level construction executes a specific set of operations to convert the client's MESH into TopologyRefiner. This set of operations combines methods independent of MESH from the base class with those specialized here for class MESH.

Definition at line 78 of file topologyRefinerFactory.h.

## Member Typedef Documentation

## TopologyError

template<class MESH >

typedef Vtr::internal::Level::TopologyError TopologyError

protected

Definition at line 131 of file topologyRefinerFactory.h.

## Member Function Documentation

## assignComponentTags()

template<class MESH >

bool assignComponentTags | ( | TopologyRefiner & | newRefiner,
|  | MESH const & | mesh )

staticprotected

(Optional) Specify edge or vertex sharpness or face holes

Definition at line 677 of file topologyRefinerFactory.h.

## assignComponentTopology()

template<class MESH >

bool assignComponentTopology | ( | TopologyRefiner & | newRefiner,
|  | MESH const & | mesh )

staticprotected

Specify the relationships between vertices, faces, etc. ie the face-vertices, vertex-faces, edge-vertices, etc.

Definition at line 608 of file topologyRefinerFactory.h.

## assignFaceVaryingTopology()

template<class MESH >

bool assignFaceVaryingTopology | ( | TopologyRefiner & | newRefiner,
|  | MESH const & | mesh )

staticprotected

(Optional) Specify face-varying data per face

Definition at line 661 of file topologyRefinerFactory.h.

## Create() [1/2]

template<class MESH >

TopologyRefiner * Create | ( | MESH const & | mesh,
|  | Options | options = Options() )

static

Instantiates a TopologyRefiner from client-provided topological representation.

If only the face-vertices topological relationships are specified with this factory, edge relationships have to be inferred, which requires additional processing. If the client topological rep can provide this information, it is highly recommended to do so.

Parameters

  mesh | Client's topological representation (or a converter)
  options | Options controlling the creation of the TopologyRefiner

Returns
  A new instance of TopologyRefiner or 0 for failure

Definition at line 333 of file topologyRefinerFactory.h.

## Create() [2/2]

template<class MESH >

TopologyRefiner * Create | ( | TopologyRefiner const & | baseLevel | ) |

static

Instantiates a TopologyRefiner from the base level of an existing instance.

This allows lightweight copies of the same topology to be refined differently for each new instance. As with other classes that refer to an existing TopologyRefiner, it must generally exist for the entire lifetime of the new instance. In this case, the base level of the original instance must be preserved.

Parameters

  baseLevel | An existing TopologyRefiner to share base level.

Returns
  A new instance of TopologyRefiner or 0 for failure

Definition at line 351 of file topologyRefinerFactory.h.

## createBaseFVarChannel() [1/2]

template<class MESH >

int createBaseFVarChannel | ( | TopologyRefiner & | newRefiner,
|  | int | numValues )

inlinestaticprotected

Create a new face-varying channel with the given number of values.

Definition at line 548 of file topologyRefinerFactory.h.

## createBaseFVarChannel() [2/2]

template<class MESH >

int createBaseFVarChannel | ( | TopologyRefiner & | newRefiner,
|  | int | numValues,
|  | Sdc::Options const & | fvarOptions )

inlinestaticprotected

Create a new face-varying channel with the given number of values and independent interpolation options.

Definition at line 553 of file topologyRefinerFactory.h.

## findBaseEdge()

template<class MESH >

Index findBaseEdge | ( | TopologyRefiner const & | newRefiner,
|  | Index | v0,
|  | Index | v1 )

inlinestaticprotected

Identify an edge to be assigned a sharpness value given a vertex pair.

Definition at line 508 of file topologyRefinerFactory.h.

## getBaseEdgeFaceLocalIndices()

template<class MESH >

LocalIndexArray getBaseEdgeFaceLocalIndices | ( | TopologyRefiner & | newRefiner,
|  | Index | e )

inlinestaticprotected

Assign the local indices of an edge within each of its incident faces.

Definition at line 492 of file topologyRefinerFactory.h.

## getBaseEdgeFaces()

template<class MESH >

IndexArray getBaseEdgeFaces | ( | TopologyRefiner & | newRefiner,
|  | Index | e )

inlinestaticprotected

Assign the faces incident each edge.

Definition at line 476 of file topologyRefinerFactory.h.

## getBaseEdgeVertices()

template<class MESH >

IndexArray getBaseEdgeVertices | ( | TopologyRefiner & | newRefiner,
|  | Index | e )

inlinestaticprotected

Assign the vertices incident each edge.

Definition at line 471 of file topologyRefinerFactory.h.

## getBaseFaceEdges()

template<class MESH >

IndexArray getBaseFaceEdges | ( | TopologyRefiner & | newRefiner,
|  | Index | f )

inlinestaticprotected

Assign the edges incident each face.

Definition at line 466 of file topologyRefinerFactory.h.

## getBaseFaceFVarValues()

template<class MESH >

IndexArray getBaseFaceFVarValues | ( | TopologyRefiner & | newRefiner,
|  | Index | face,
|  | int | channel = 0 )

inlinestaticprotected

Assign the face-varying values for the corners of each face.

Definition at line 560 of file topologyRefinerFactory.h.

## getBaseFaceVertices()

template<class MESH >

IndexArray getBaseFaceVertices | ( | TopologyRefiner & | newRefiner,
|  | Index | f )

inlinestaticprotected

Assign the vertices incident each face.

Definition at line 461 of file topologyRefinerFactory.h.

## getBaseVertexEdgeLocalIndices()

template<class MESH >

LocalIndexArray getBaseVertexEdgeLocalIndices | ( | TopologyRefiner & | newRefiner,
|  | Index | v )

inlinestaticprotected

Assign the local indices of a vertex within each of its incident edges.

Definition at line 502 of file topologyRefinerFactory.h.

## getBaseVertexEdges()

template<class MESH >

IndexArray getBaseVertexEdges | ( | TopologyRefiner & | newRefiner,
|  | Index | v )

inlinestaticprotected

Assign the edges incident each vertex.

Definition at line 486 of file topologyRefinerFactory.h.

## getBaseVertexFaceLocalIndices()

template<class MESH >

LocalIndexArray getBaseVertexFaceLocalIndices | ( | TopologyRefiner & | newRefiner,
|  | Index | v )

inlinestaticprotected

Assign the local indices of a vertex within each of its incident faces.

Definition at line 497 of file topologyRefinerFactory.h.

## getBaseVertexFaces()

template<class MESH >

IndexArray getBaseVertexFaces | ( | TopologyRefiner & | newRefiner,
|  | Index | v )

inlinestaticprotected

Assign the faces incident each vertex.

Definition at line 481 of file topologyRefinerFactory.h.

## getNumBaseEdges()

template<class MESH >

int getNumBaseEdges | ( | TopologyRefiner const & | newRefiner | ) |

inlinestaticprotected

Definition at line 428 of file topologyRefinerFactory.h.

## getNumBaseFaces()

template<class MESH >

int getNumBaseFaces | ( | TopologyRefiner const & | newRefiner | ) |

inlinestaticprotected

Definition at line 423 of file topologyRefinerFactory.h.

## getNumBaseVertices()

template<class MESH >

int getNumBaseVertices | ( | TopologyRefiner const & | newRefiner | ) |

inlinestaticprotected

Definition at line 433 of file topologyRefinerFactory.h.

## populateBaseLevel()

template<class MESH >

bool populateBaseLevel | ( | TopologyRefiner & | refiner,
|  | MESH const & | mesh,
|  | Options | options )

staticprotected

Definition at line 358 of file topologyRefinerFactory.h.

## populateBaseLocalIndices()

template<class MESH >

void populateBaseLocalIndices | ( | TopologyRefiner & | newRefiner | ) |

inlinestaticprotected

Determine all local indices by inspection (only for pure manifold meshes)

Definition at line 514 of file topologyRefinerFactory.h.

## reportInvalidTopology()

template<class MESH >

void reportInvalidTopology | ( | TopologyError | errCode,
|  | char const * | msg,
|  | MESH const & | mesh )

staticprotected

(Optional) Control run-time topology validation and error reporting

Definition at line 694 of file topologyRefinerFactory.h.

## resizeComponentTopology()

template<class MESH >

bool resizeComponentTopology | ( | TopologyRefiner & | newRefiner,
|  | MESH const & | mesh )

staticprotected

Specify the number of vertices, faces, face-vertices, etc.

Definition at line 567 of file topologyRefinerFactory.h.

## setBaseEdgeNonManifold()

template<class MESH >

void setBaseEdgeNonManifold | ( | TopologyRefiner & | newRefiner,
|  | Index | e,
|  | bool | b )

inlinestaticprotected

Tag an edge as non-manifold.

Definition at line 520 of file topologyRefinerFactory.h.

## setBaseEdgeSharpness()

template<class MESH >

void setBaseEdgeSharpness | ( | TopologyRefiner & | newRefiner,
|  | Index | e,
|  | float | sharpness )

inlinestaticprotected

Assign a sharpness value to a given edge.

Definition at line 531 of file topologyRefinerFactory.h.

## setBaseFaceHole()

template<class MESH >

void setBaseFaceHole | ( | TopologyRefiner & | newRefiner,
|  | Index | f,
|  | bool | isHole )

inlinestaticprotected

Tag a face as a hole.

Definition at line 541 of file topologyRefinerFactory.h.

## setBaseVertexNonManifold()

template<class MESH >

void setBaseVertexNonManifold | ( | TopologyRefiner & | newRefiner,
|  | Index | v,
|  | bool | b )

inlinestaticprotected

Tag a vertex as non-manifold.

Definition at line 525 of file topologyRefinerFactory.h.

## setBaseVertexSharpness()

template<class MESH >

void setBaseVertexSharpness | ( | TopologyRefiner & | newRefiner,
|  | Index | v,
|  | float | sharpness )

inlinestaticprotected

Assign a sharpness value to a given vertex.

Definition at line 536 of file topologyRefinerFactory.h.

## setNumBaseEdgeFaces()

template<class MESH >

void setNumBaseEdgeFaces | ( | TopologyRefiner & | newRefiner,
|  | Index | e,
|  | int | count )

inlinestaticprotected

Specify the number of faces incident each edge.

Definition at line 445 of file topologyRefinerFactory.h.

## setNumBaseEdges()

template<class MESH >

void setNumBaseEdges | ( | TopologyRefiner & | newRefiner,
|  | int | count )

inlinestaticprotected

Specify the number of edges to be accommodated.

Definition at line 412 of file topologyRefinerFactory.h.

## setNumBaseFaces()

template<class MESH >

void setNumBaseFaces | ( | TopologyRefiner & | newRefiner,
|  | int | count )

inlinestaticprotected

Specify the number of faces to be accommodated.

Definition at line 407 of file topologyRefinerFactory.h.

## setNumBaseFaceVertices()

template<class MESH >

void setNumBaseFaceVertices | ( | TopologyRefiner & | newRefiner,
|  | Index | f,
|  | int | count )

inlinestaticprotected

Specify the number of vertices incident each face.

Definition at line 439 of file topologyRefinerFactory.h.

## setNumBaseVertexEdges()

template<class MESH >

void setNumBaseVertexEdges | ( | TopologyRefiner & | newRefiner,
|  | Index | v,
|  | int | count )

inlinestaticprotected

Specify the number of edges incident each vertex.

Definition at line 455 of file topologyRefinerFactory.h.

## setNumBaseVertexFaces()

template<class MESH >

void setNumBaseVertexFaces | ( | TopologyRefiner & | newRefiner,
|  | Index | v,
|  | int | count )

inlinestaticprotected

Specify the number of faces incident each vertex.

Definition at line 450 of file topologyRefinerFactory.h.

## setNumBaseVertices()

template<class MESH >

void setNumBaseVertices | ( | TopologyRefiner & | newRefiner,
|  | int | count )

inlinestaticprotected

Specify the number of vertices to be accommodated.

Definition at line 417 of file topologyRefinerFactory.h.

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

- opensubdiv/far/topologyRefiner.h
- opensubdiv/far/topologyRefinerFactory.h