FilterType Interface Reference

Selectively extract and filter point data using a custom filter operator. More...

#include <openvdb/tools/PointIndexGrid.h>

Detailed Description

Selectively extract and filter point data using a custom filter operator.

FilterType example:

template<typename T>
struct WeightedAverageAccumulator {
  using ValueType = T;

  WeightedAverageAccumulator(T const * const array, const T radius)
    : mValues(array), mInvRadius(1.0/radius), mWeightSum(0.0), mValueSum(0.0) {}

  void reset() { mWeightSum = mValueSum = T(0.0); }

  // the following method is invoked by the PointIndexFilter
  void operator()(const T distSqr, const size_t pointIndex) {
    const T weight = T(1.0) - openvdb::math::Sqrt(distSqr) * mInvRadius;
    mWeightSum += weight;
    mValueSum += weight * mValues[pointIndex];
  }

  T result() const { return mWeightSum > T(0.0) ? mValueSum / mWeightSum : T(0.0); }

private:
  T const * const mValues;
  const T mInvRadius;
  T mWeightSum, mValueSum;
}; // struct WeightedAverageAccumulator