71 lines
1.2 KiB
Plaintext
71 lines
1.2 KiB
Plaintext
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file physxMeshHash.I
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* @author enn0x
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* @date 2010-09-13
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*/
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/**
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*
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*/
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INLINE PhysxMeshHash::
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PhysxMeshHash() {
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_time = 1;
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MeshHashRoot *r = _hashIndex;
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for (int i=0; i < _hashIndexSize; i++) {
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r->first = -1;
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r->timeStamp = 0;
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r++;
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}
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_spacing = 0.25f;
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_invSpacing = 1.0f / _spacing;
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}
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/**
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*
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*/
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INLINE PhysxMeshHash::
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~PhysxMeshHash() {
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}
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/**
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*
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*/
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INLINE int PhysxMeshHash::
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hash_function(int xi, int yi, int zi) const {
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unsigned int h = (xi * 92837111)^(yi * 689287499)^(zi * 283923481);
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return h % _hashIndexSize;
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}
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/**
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*
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*/
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INLINE void PhysxMeshHash::
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cell_coord_of(const NxVec3 &v, int &xi, int &yi, int &zi) const {
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xi = (int)(v.x * _invSpacing); if (v.x < 0.0f) xi--;
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yi = (int)(v.y * _invSpacing); if (v.y < 0.0f) yi--;
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zi = (int)(v.z * _invSpacing); if (v.z < 0.0f) zi--;
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}
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/**
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*
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*/
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INLINE NxF32 PhysxMeshHash::
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get_grid_spacing() const {
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return 1.0f / _invSpacing;
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}
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