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+ // Redistribution and use in source and binary forms, with or without
+ // modification, are permitted provided that the following conditions
+ // are met:
+ // * Redistributions of source code must retain the above copyright
+ // notice, this list of conditions and the following disclaimer.
+ // * Redistributions in binary form must reproduce the above copyright
+ // notice, this list of conditions and the following disclaimer in the
+ // documentation and/or other materials provided with the distribution.
+ // * Neither the name of NVIDIA CORPORATION nor the names of its
+ // contributors may be used to endorse or promote products derived
+ // from this software without specific prior written permission.
+ //
+ // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+ // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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+ // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ // OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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+ // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ //
+ // Copyright (c) 2008-2026 NVIDIA Corporation. All rights reserved.
+ // Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
+ // Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
+
+ #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