fdaccc22db
Change the VTKM_CONT_EXPORT to VTKM_CONT. (Likewise for EXEC and EXEC_CONT.) Remove the inline from these macros so that they can be applied to everything, including implementations in a library. Because inline is not declared in these modifies, you have to add the keyword to functions and methods where the implementation is not inlined in the class.
231 lines
7.1 KiB
C++
231 lines
7.1 KiB
C++
//============================================================================
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// Copyright (c) Kitware, Inc.
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// All rights reserved.
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// See LICENSE.txt for details.
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// This software is distributed WITHOUT ANY WARRANTY; without even
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// the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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// PURPOSE. See the above copyright notice for more information.
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//
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// Copyright 2014 Sandia Corporation.
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// Copyright 2014 UT-Battelle, LLC.
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// Copyright 2014 Los Alamos National Security.
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Under the terms of Contract DE-AC52-06NA25396 with Los Alamos National
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// Laboratory (LANL), the U.S. Government retains certain rights in
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// this software.
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//============================================================================
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#ifndef VTKM_KERNEL_SPLINE_3RD_ORDER_H
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#define VTKM_KERNEL_SPLINE_3RD_ORDER_H
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#include "KernelBase.h"
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//
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// Spline 3rd Order kernel.
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//
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namespace vtkm { namespace worklet {
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namespace splatkernels {
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template <int Dimensions>
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struct Spline3rdOrder : public KernelBase< Spline3rdOrder<Dimensions> >
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{
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//---------------------------------------------------------------------
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// Constructor
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// Calculate coefficients used repeatedly when evaluating the kernel
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// value or gradient
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VTKM_EXEC_CONT
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Spline3rdOrder(double smoothingLength)
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: KernelBase< Spline3rdOrder<Dimensions> >(smoothingLength)
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{
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Hinverse_ = 1.0/smoothingLength;
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Hinverse2_ = Hinverse_*Hinverse_;
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maxRadius_ = 2.0*smoothingLength;
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maxRadius2_ = maxRadius_*maxRadius_;
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//
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if (Dimensions==2) {
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norm_ = 10.0/(7.0*M_PI);
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}
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if (Dimensions==3) {
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norm_ = 1.0/M_PI;
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}
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scale_W_ = norm_ * PowerExpansion<Dimensions> (Hinverse_);
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scale_GradW_ = norm_ * PowerExpansion<Dimensions+1>(Hinverse_);
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}
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//---------------------------------------------------------------------
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// Calculates the kernel value for the given distance
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VTKM_EXEC_CONT
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double w(double distance) const
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{
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// compute Q=(r/h)
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double Q = distance * Hinverse_;
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if (Q<1.0) {
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return scale_W_ *(1.0 - (3.0/2.0)*Q*Q + (3.0/4.0)*Q*Q*Q);
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}
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else if (Q<2.0) {
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double q2 = (2.0-Q);
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return scale_W_ * (1.0/4.0) * (q2*q2*q2);;
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}
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else {
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return 0.0;
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}
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}
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//---------------------------------------------------------------------
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// Calculates the kernel value for the given squared distance
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VTKM_EXEC_CONT
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double w2(double distance2) const
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{
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// compute Q
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double Q = sqrt(distance2) * Hinverse_;
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if (Q<1.0) {
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return scale_W_ *(1.0 - (3.0/2.0)*Q*Q + (3.0/4.0)*Q*Q*Q);
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}
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else if (Q<2.0) {
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double q2 = (2.0-Q);
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return scale_W_ * (1.0/4.0) * (q2*q2*q2);;
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}
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else {
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return 0.0;
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}
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}
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//---------------------------------------------------------------------
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// compute w(h) for a variable h kernel
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VTKM_EXEC_CONT
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double w(double h, double distance) const
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{
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double Hinverse = 1.0/h;
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double scale_W = norm_ * PowerExpansion<Dimensions>(Hinverse);
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double Q = distance * Hinverse;
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if (Q<1.0) {
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return scale_W *(1.0 - (3.0/2.0)*Q*Q + (3.0/4.0)*Q*Q*Q);
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}
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else if (Q<2.0) {
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double q2 = (2.0-Q);
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return scale_W * (1.0/4.0) * (q2*q2*q2);;
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}
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else {
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return 0.0;
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}
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}
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//---------------------------------------------------------------------
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// compute w(h) for a variable h kernel using distance squared
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VTKM_EXEC_CONT
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double w2(double h, double distance2) const
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{
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double Hinverse = 1.0/h;
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double scale_W = norm_ * PowerExpansion<Dimensions>(Hinverse);
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double Q = sqrt(distance2) * Hinverse;
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if (Q<1.0) {
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return scale_W *(1.0 - (3.0/2.0)*Q*Q + (3.0/4.0)*Q*Q*Q);
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}
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else if (Q<2.0) {
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double q2 = (2.0-Q);
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return scale_W * (1.0/4.0) * (q2*q2*q2);;
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}
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else {
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return 0.0;
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}
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}
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//---------------------------------------------------------------------
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// Calculates the kernel derivation for the given distance of two particles.
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// The used formula is the derivation of Speith (3.126) for the value
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// with (3.21) for the direction of the gradient vector.
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// Be careful: grad W is antisymmetric in r (3.25)!.
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VTKM_EXEC_CONT
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vector_type gradW(double distance, const vector_type& pos) const
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{
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double Q = distance * Hinverse_;
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if (Q==0.0) {
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return vector_type(0.0);
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}
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else if (Q<1.0) {
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return scale_GradW_ * (-3.0*Q + (9.0/4.0)*Q*Q) * pos;
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}
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else if (Q<2.0) {
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double q2 = (2.0-Q);
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return scale_GradW_ * (-3.0/4.0)*q2*q2 * pos;
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}
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else {
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return vector_type(0.0);
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}
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}
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//---------------------------------------------------------------------
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VTKM_EXEC_CONT
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vector_type gradW(double h, double distance, const vector_type& pos) const
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{
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double Hinverse = 1.0/h;
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double scale_GradW = norm_ * PowerExpansion<Dimensions+1>(Hinverse);
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double Q = distance * Hinverse;
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if (Q==0.0) {
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return vector_type(0.0);
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}
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else if (Q<1.0) {
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return scale_GradW * (-3.0*Q + (9.0/4.0)*Q*Q) * pos;
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}
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else if (Q<2.0) {
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double q2 = (2.0-Q);
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return scale_GradW * (-3.0/4.0)*q2*q2 * pos;
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}
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else {
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return vector_type(0.0);
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}
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}
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//---------------------------------------------------------------------
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// return the maximum distance at which this kernel is non zero
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VTKM_EXEC_CONT
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double maxDistance() const
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{
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return maxRadius_;
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}
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//---------------------------------------------------------------------
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// return the maximum distance at which this variable h kernel is non zero
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VTKM_EXEC_CONT
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double maxDistance(double h) const
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{
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return 2.0*h;
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}
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//---------------------------------------------------------------------
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// return the maximum distance at which this kernel is non zero
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VTKM_EXEC_CONT
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double maxSquaredDistance() const
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{
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return maxRadius2_;
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}
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//---------------------------------------------------------------------
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// return the maximum distance at which this kernel is non zero
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VTKM_EXEC_CONT
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double maxSquaredDistance(double h) const
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{
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return 4.0*h*h;
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}
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//---------------------------------------------------------------------
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// return the multiplier between smoothing length and max cutoff distance
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VTKM_EXEC_CONT
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double getDilationFactor() const { return 2.0; }
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private:
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double norm_;
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double Hinverse_;
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double Hinverse2_;
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double maxRadius_;
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double maxRadius2_;
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double scale_W_;
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double scale_GradW_;
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};
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}}}
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#endif
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