godot/thirdparty/thekla_atlas/nvmath/Fitting.h
Hein-Pieter van Braam bf05309af7 Import thekla_atlas
As requested by reduz, an import of thekla_atlas into thirdparty/
2017-12-08 15:47:15 +01:00

51 lines
2.3 KiB
C++

// This code is in the public domain -- Ignacio Castaño <castano@gmail.com>
#pragma once
#ifndef NV_MATH_FITTING_H
#define NV_MATH_FITTING_H
#include "Vector.h"
#include "Plane.h"
namespace nv
{
namespace Fit
{
Vector3 computeCentroid(int n, const Vector3 * points);
Vector3 computeCentroid(int n, const Vector3 * points, const float * weights, const Vector3 & metric);
Vector4 computeCentroid(int n, const Vector4 * points);
Vector4 computeCentroid(int n, const Vector4 * points, const float * weights, const Vector4 & metric);
Vector3 computeCovariance(int n, const Vector3 * points, float * covariance);
Vector3 computeCovariance(int n, const Vector3 * points, const float * weights, const Vector3 & metric, float * covariance);
Vector4 computeCovariance(int n, const Vector4 * points, float * covariance);
Vector4 computeCovariance(int n, const Vector4 * points, const float * weights, const Vector4 & metric, float * covariance);
Vector3 computePrincipalComponent_PowerMethod(int n, const Vector3 * points);
Vector3 computePrincipalComponent_PowerMethod(int n, const Vector3 * points, const float * weights, const Vector3 & metric);
Vector3 computePrincipalComponent_EigenSolver(int n, const Vector3 * points);
Vector3 computePrincipalComponent_EigenSolver(int n, const Vector3 * points, const float * weights, const Vector3 & metric);
Vector4 computePrincipalComponent_EigenSolver(int n, const Vector4 * points);
Vector4 computePrincipalComponent_EigenSolver(int n, const Vector4 * points, const float * weights, const Vector4 & metric);
Vector3 computePrincipalComponent_SVD(int n, const Vector3 * points);
Vector4 computePrincipalComponent_SVD(int n, const Vector4 * points);
Plane bestPlane(int n, const Vector3 * points);
bool isPlanar(int n, const Vector3 * points, float epsilon = NV_EPSILON);
bool eigenSolveSymmetric3(const float matrix[6], float eigenValues[3], Vector3 eigenVectors[3]);
bool eigenSolveSymmetric4(const float matrix[10], float eigenValues[4], Vector4 eigenVectors[4]);
// Returns number of clusters [1-4].
int compute4Means(int n, const Vector3 * points, const float * weights, const Vector3 & metric, Vector3 * cluster);
}
} // nv namespace
#endif // NV_MATH_FITTING_H