OpenMesh::Decimater::ModBaseT< MeshT > Class Template Reference

Base class for all decimation modules. More...

`#include <OpenMesh/Tools/Decimater/ModBaseT.hh>`

Inheritance diagram for OpenMesh::Decimater::ModBaseT< MeshT >:
[legend]

## Public Types

enum | { ILLEGAL_COLLAPSE = -1, LEGAL_COLLAPSE = 0 }
typedef MeshT | Mesh
typedef CollapseInfoT< MeshT > | CollapseInfo

## Public Member Functions

virtual | ~ModBaseT ()
| Virtual desctructor.
virtual const std::string & | name () const
| Set module's name (using DECIMATER_MODNAME macro)
bool | is_binary (void) const
| Returns true if criteria returns a binary value.
void | set_binary (bool _b)
| Set whether module is binary or not.
virtual void | initialize ()
| Initialize module-internal stuff.
virtual float | collapse_priority (const CollapseInfoT< MeshT > &)
| Return collapse priority. More...
virtual void | preprocess_collapse (const CollapseInfoT< MeshT > &)
| Before _from_vh has been collapsed into _to_vh, this method will be called.
virtual void | postprocess_collapse (const CollapseInfoT< MeshT > &)
| After _from_vh has been collapsed into _to_vh, this method will be called.
virtual void | set_error_tolerance_factor (double _factor)
| This provides a function that allows the setting of a percentage of the original contraint. More...

## Protected Member Functions

| ModBaseT (MeshT &_mesh, bool _is_binary)
| Default constructor. More...
MeshT & | mesh ()
| Access the mesh associated with the decimater.

## Protected Attributes

double | error_tolerance_factor_

## Detailed Description

### template<typename MeshT>
class OpenMesh::Decimater::ModBaseT< MeshT >

Base class for all decimation modules.

Each module has to implement this interface. To build your own module you have to

1. derive from this class.
2. create the basic settings with DECIMATING_MODULE().
3. override collapse_priority(), if necessary.
4. override initialize(), if necessary.
5. override postprocess_collapse(), if necessary.

A module has two major working modes:

1. binary mode
2. non-binary mode

In the binary mode collapse_priority() checks a constraint and returns LEGAL_COLLAPSE or ILLEGAL_COLLAPSE.

In the non-binary mode the module computes a float error value in the range [0, inf) and returns it. In the case a constraint has been set, e.g. the error must be lower than a upper bound, and the constraint is violated, collapse_priority() must return ILLEGAL_COLLAPSE.

See also
  collapse_priority()

Todo:
  "Tutorial on building a custom decimation module."

## Member Enumeration Documentation

## anonymous enum

template<typename MeshT>

anonymous enum

Enumerator
ILLEGAL_COLLAPSE | indicates an illegal collapse
LEGAL_COLLAPSE | indicates a legal collapse

## Constructor & Destructor Documentation

## ModBaseT()

template<typename MeshT>

OpenMesh::Decimater::ModBaseT< MeshT >::ModBaseT | ( | MeshT & | _mesh,
|  | bool | _is_binary
| ) |  |

inlineprotected

Default constructor.

See also
  Mesh Decimation Framework

## Member Function Documentation

## collapse_priority()

template<typename MeshT>

virtual float OpenMesh::Decimater::ModBaseT< MeshT >::collapse_priority | ( | const CollapseInfoT< MeshT > & |  | ) |

inlinevirtual

Return collapse priority.

In the binary mode collapse_priority() checks a constraint and returns LEGAL_COLLAPSE or ILLEGAL_COLLAPSE.

In the non-binary mode the module computes a float error value in the range [0, inf) and returns it. In the case a constraint has been set, e.g. the error must be lower than a upper bound, and the constraint is violated, collapse_priority() must return ILLEGAL_COLLAPSE.

Returns
  Collapse priority in the range [0,inf), `LEGAL_COLLAPSE` or `ILLEGAL_COLLAPSE`.

Reimplemented in OpenMesh::Decimater::ModNormalDeviationT< MeshT >, OpenMesh::Decimater::ModNormalFlippingT< MeshT >, OpenMesh::Decimater::ModHausdorffT< MeshT >, OpenMesh::Decimater::ModRoundnessT< MeshT >, OpenMesh::Decimater::ModQuadricT< MeshT >, OpenMesh::Decimater::ModQuadricT< D >, and OpenMesh::Decimater::ModEdgeLengthT< MeshT >.

## set_error_tolerance_factor()

template<typename MeshT>

virtual void OpenMesh::Decimater::ModBaseT< MeshT >::set_error_tolerance_factor | ( | double | _factor | ) |

inlinevirtual

This provides a function that allows the setting of a percentage of the original contraint.

Note that the module might need to be re-initialized again after setting the percentage

Parameters

  _factor | has to be in the closed interval between 0.0 and 1.0

Reimplemented in OpenMesh::Decimater::ModNormalDeviationT< MeshT >, OpenMesh::Decimater::ModRoundnessT< MeshT >, OpenMesh::Decimater::ModNormalFlippingT< MeshT >, OpenMesh::Decimater::ModQuadricT< MeshT >, OpenMesh::Decimater::ModQuadricT< D >, OpenMesh::Decimater::ModHausdorffT< MeshT >, OpenMesh::Decimater::ModAspectRatioT< MeshT >, and OpenMesh::Decimater::ModEdgeLengthT< MeshT >.

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

- OpenMesh/Tools/Decimater/ModBaseT.hh