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// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// SPDX-FileCopyrightText: Copyright (c) 2008-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
#ifndef PX_SPARSE_GRID_PARAMS_H
#define PX_SPARSE_GRID_PARAMS_H
#include "foundation/PxSimpleTypes.h"
#include "foundation/PxMath.h"
#if !PX_DOXYGEN
namespace physx
{
#endif
/**
\brief Parameters to define the sparse grid settings like grid spacing, maximal number of subgrids etc.
*/
struct PxSparseGridParams
{
/**
\brief Default constructor.
*/
PX_INLINE PxSparseGridParams()
{
maxNumSubgrids = 512;
subgridSizeX = 32;
subgridSizeY = 32;
subgridSizeZ = 32;
gridSpacing = 0.2f;
haloSize = 1;
}
/**
\brief Copy constructor.
*/
PX_CUDA_CALLABLE PX_INLINE PxSparseGridParams(const PxSparseGridParams& params)
{
maxNumSubgrids = params.maxNumSubgrids;
subgridSizeX = params.subgridSizeX;
subgridSizeY = params.subgridSizeY;
subgridSizeZ = params.subgridSizeZ;
gridSpacing = params.gridSpacing;
haloSize = params.haloSize;
}
PX_CUDA_CALLABLE PX_INLINE PxU32 getNumCellsPerSubgrid() const
{
return subgridSizeX * subgridSizeY * subgridSizeZ;
}
PX_CUDA_CALLABLE PX_INLINE PxReal getSqrt3dx() const
{
return PxSqrt(3.0f) * gridSpacing;
}
/**
\brief (re)sets the structure to the default.
*/
PX_INLINE void setToDefault()
{
*this = PxSparseGridParams();
}
/**
\brief Assignment operator
*/
PX_INLINE void operator = (const PxSparseGridParams& params)
{
maxNumSubgrids = params.maxNumSubgrids;
subgridSizeX = params.subgridSizeX;
subgridSizeY = params.subgridSizeY;
subgridSizeZ = params.subgridSizeZ;
gridSpacing = params.gridSpacing;
haloSize = params.haloSize;
}
PxU32 maxNumSubgrids; //!< Maximum number of subgrids
PxReal gridSpacing; //!< Grid spacing for the grid
PxU16 subgridSizeX; //!< Subgrid resolution in x dimension (must be an even number)
PxU16 subgridSizeY; //!< Subgrid resolution in y dimension (must be an even number)
PxU16 subgridSizeZ; //!< Subgrid resolution in z dimension (must be an even number)
PxU16 haloSize; //!< Number of halo cell layers around every subgrid cell. Only 0 and 1 are valid values
};
#if !PX_DOXYGEN
} // namespace physx
#endif
#endif