OpenVDB: EllipsoidSettings< AttributeTs, RadiusAttributeT, FilterT > Struct Template Reference

OpenVDB 12.1.1

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EllipsoidSettings< AttributeTs, RadiusAttributeT, FilterT > Struct Template Reference

Anisotropic point rasterization based on the principal component analysis of point neighbours. See the struct member documentation for detailed behavior. More...

`#include <openvdb/points/PointRasterizeSDF.h>`

Inheritance diagram for EllipsoidSettings< AttributeTs, RadiusAttributeT, FilterT >:

## Public Types
using | BaseT = SphereSettings<AttributeTs, RadiusAttributeT, FilterT>
using | AttributeTypes = typename BaseT::AttributeTypes
using | RadiusAttributeType = typename BaseT::RadiusAttributeType
using | FilterType = typename BaseT::FilterType

## Public Attributes
std::string | rotation = "rotation"
std::string | pws = ""
Real | halfband
math::Transform::Ptr | transform
std::vector< std::string > | attributes
const FilterT * | filter
util::NullInterrupter * | interrupter
std::string | radius
RadiusScaleT | radiusScale

## Protected Types
using | RadiusScaleT

## Detailed Description

template<typename AttributeTs = TypeList<>, typename RadiusAttributeT = Vec3f, typename FilterT = NullFilter>
struct openvdb::v12_1::points::EllipsoidSettings< AttributeTs, RadiusAttributeT, FilterT >

Anisotropic point rasterization based on the principal component analysis of point neighbours. See the struct member documentation for detailed behavior.

This rasterization technique is typically used with the accompanying PCA tools in PrincipalComponentAnalysis.h which initializes the required attributes. These attributes define the rotational and affine transformations which can be used to construct ellipsoids for each point. Typically (for our intended surfacing) these transformations are built by analysing each points neighbourhood distributions and constructing tight ellipsoids that orient themselves to follow these point distributions.

Note
  Protected inheritance prevents accidental struct slicing

## Member Typedef Documentation

## ◆ AttributeTypes

template<typename AttributeTs = TypeList<>, typename RadiusAttributeT = Vec3f, typename FilterT = NullFilter>

using AttributeTypes = typename BaseT::AttributeTypes

## ◆ BaseT

template<typename AttributeTs = TypeList<>, typename RadiusAttributeT = Vec3f, typename FilterT = NullFilter>

using BaseT = SphereSettings<AttributeTs, RadiusAttributeT, FilterT>

## ◆ FilterType

template<typename AttributeTs = TypeList<>, typename RadiusAttributeT = Vec3f, typename FilterT = NullFilter>

using FilterType FilterType = typename BaseT::FilterType

## ◆ RadiusAttributeType

template<typename AttributeTs = TypeList<>, typename RadiusAttributeT = Vec3f, typename FilterT = NullFilter>

using RadiusAttributeType = typename BaseT::RadiusAttributeType

## ◆ RadiusScaleT

using RadiusScaleT
| inherited

Parameters

  radiusScale | the scale applied to every world space radius value

Note
  If no radius attribute is provided, this is used as the uniform world space radius for every point. Most surfacing operations will perform faster if they are able to assume a uniform radius (so use this value instead of setting the radius parameter if radii are uniform).
  Type of the scale is always double precision (the Promote exists as this could be a vector scale - see EllipsoidSettings).

## Member Data Documentation

## ◆ attributes

template<typename AttributeTs = TypeList<>, typename RadiusAttributeT = Vec3f, typename FilterT = NullFilter>

std::vector<std::string> attributes

Parameters

  attributes | list of attributes to transfer

if the attributes vector is empty, only the surface is built. Otherwise, every voxel's closest point is used to transfer each attribute in the attributes parameter to a new grid of matching topology. The built surface is always the first grid returned from the surfacing operation, followed by attribute grids in the order that they appear in this vector.

The AttributeTs template parameter should be a TypeList of the required or possible attributes types. Example:

// compile support for int, double and Vec3f attribute transferring
using SupportedTypes = TypeList<int, double, Vec3f>;
SphereSettings<SupportedTypes> s;
// Produce 4 additional grids from the "v", "Cd", "id" and "density"
// attributes. Their attribute value types must be available in the
// provided TypeList
s.attributes = {"v", "Cd", "id", "density"};
openvdb::v12_1::TypeList
A list of types (not necessarily unique).
Definition TypeList.h:578
openvdb::v12_1::points::SphereSettings
Generic settings for narrow band spherical stamping with a uniform or varying radius and optionally w...
Definition PointRasterizeSDF.h:157
openvdb::v12_1::points::SphereSettings::attributes
std::vector< std::string > attributes
Definition PointRasterizeSDF.h:216

A runtime error will be thrown if no equivalent type for a given attribute is found in the AttributeTs TypeList.

Note
  The destination types of these grids is equal to the ValueConverter result of the attribute type applied to the PointDataGridT.

## ◆ filter

template<typename AttributeTs = TypeList<>, typename RadiusAttributeT = Vec3f, typename FilterT = NullFilter>

const FilterT* filter

Parameters

  filter | a filter to apply to points. Only points that evaluate to true using this filter are rasterized, regardless of any other filtering derived schemes may use.

## ◆ halfband

template<typename AttributeTs = TypeList<>, typename RadiusAttributeT = Vec3f, typename FilterT = NullFilter>

Real halfband

Parameters

  halfband | the half band width of the generated surface.

## ◆ interrupter

template<typename AttributeTs = TypeList<>, typename RadiusAttributeT = Vec3f, typename FilterT = NullFilter>

util::NullInterrupter* interrupter

Parameters

  interrupter | optional interrupter

## ◆ pws

template<typename AttributeTs = TypeList<>, typename RadiusAttributeT = Vec3f, typename FilterT = NullFilter>

std::string pws = ""

Parameters

  pws | An optional attribute which represents the world space position of a point.

This can be useful to override the position of a point in index space. If it exists, it must be a Vec3d type.

## ◆ radius

template<typename AttributeTs = TypeList<>, typename RadiusAttributeT = Vec3f, typename FilterT = NullFilter>

std::string radius

Note
  For ellipsoid rasterization, the radius attribute and scale need to be Vec3f types (RadiusAttributeT defaults to this). This represents each ellipsoids stretch and squash coefficients.

## ◆ radiusScale

template<typename AttributeTs = TypeList<>, typename RadiusAttributeT = Vec3f, typename FilterT = NullFilter>

RadiusScaleT radiusScale

## ◆ rotation

template<typename AttributeTs = TypeList<>, typename RadiusAttributeT = Vec3f, typename FilterT = NullFilter>

std::string rotation = "rotation"

Parameters

  rotation | the attribute containing each points orthogonal rotation matrix.

This attribute must exist and represents the rotation of each points ellipse. Must be a Mat3s type.

## ◆ transform

template<typename AttributeTs = TypeList<>, typename RadiusAttributeT = Vec3f, typename FilterT = NullFilter>

math::Transform::Ptr transform

Parameters

  transform | the target transform for the surface. Most surfacing operations impose linear restrictions on the target transform.