Chaste Commit::baa90ac2819b962188b7562f2326be23c47859a7
RandomDirectionCentreBasedDivisionRule.cpp
1/*
2
3Copyright (c) 2005-2024, University of Oxford.
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5
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7University of Oxford, having an administrative office at Wellington
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10This file is part of Chaste.
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12Redistribution and use in source and binary forms, with or without
13modification, are permitted provided that the following conditions are met:
14 * Redistributions of source code must retain the above copyright notice,
15 this list of conditions and the following disclaimer.
16 * Redistributions in binary form must reproduce the above copyright notice,
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19 * Neither the name of the University of Oxford nor the names of its
20 contributors may be used to endorse or promote products derived from this
21 software without specific prior written permission.
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23THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
24AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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32OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33
34*/
35
36#include "RandomDirectionCentreBasedDivisionRule.hpp"
37#include "RandomNumberGenerator.hpp"
38
39template<unsigned ELEMENT_DIM, unsigned SPACE_DIM>
40std::pair<c_vector<double, SPACE_DIM>, c_vector<double, SPACE_DIM> > RandomDirectionCentreBasedDivisionRule<ELEMENT_DIM, SPACE_DIM>::CalculateCellDivisionVector(
41 CellPtr pParentCell,
43{
44 // Get separation parameter
45 double separation = rCellPopulation.GetMeinekeDivisionSeparation();
46
47 // Make a random direction vector of the required length
48 c_vector<double, SPACE_DIM> random_vector;
49
50 /*
51 * Pick a random direction and move the parent cell backwards by 0.5*separation
52 * in that direction and return the position of the daughter cell 0.5*separation
53 * forwards in that direction.
54 */
55 switch (SPACE_DIM)
56 {
57 case 1:
58 {
59 double random_direction = -1.0 + 2.0*(RandomNumberGenerator::Instance()->ranf() < 0.5);
60
61 random_vector(0) = 0.5*separation*random_direction;
62 break;
63 }
64 case 2:
65 {
66 double random_angle = 2.0*M_PI*RandomNumberGenerator::Instance()->ranf();
67
68 random_vector(0) = 0.5*separation*cos(random_angle);
69 random_vector(1) = 0.5*separation*sin(random_angle);
70 break;
71 }
72 case 3:
73 {
74 /*
75 * Note that to pick a random point on the surface of a sphere, it is incorrect
76 * to select spherical coordinates from uniform distributions on [0, 2*pi) and
77 * [0, pi) respectively, since points picked in this way will be 'bunched' near
78 * the poles. See #2230.
79 */
82
83 double random_azimuth_angle = 2*M_PI*u;
84 double random_zenith_angle = std::acos(2*v - 1);
85
86 random_vector(0) = 0.5*separation*cos(random_azimuth_angle)*sin(random_zenith_angle);
87 random_vector(1) = 0.5*separation*sin(random_azimuth_angle)*sin(random_zenith_angle);
88 random_vector(2) = 0.5*separation*cos(random_zenith_angle);
89 break;
90 }
91 default:
92 // This can't happen
94 }
95
96 c_vector<double, SPACE_DIM> parent_position = rCellPopulation.GetLocationOfCellCentre(pParentCell) - random_vector;
97 c_vector<double, SPACE_DIM> daughter_position = parent_position + 2.0*random_vector;
98
99 std::pair<c_vector<double, SPACE_DIM>, c_vector<double, SPACE_DIM> > positions(parent_position, daughter_position);
100
101 return positions;
102}
103
104// Explicit instantiation
111
112// Serialization for Boost >= 1.36
#define NEVER_REACHED
#define EXPORT_TEMPLATE_CLASS_ALL_DIMS(CLASS)
c_vector< double, SPACE_DIM > GetLocationOfCellCentre(CellPtr pCell)
virtual std::pair< c_vector< double, SPACE_DIM >, c_vector< double, SPACE_DIM > > CalculateCellDivisionVector(CellPtr pParentCell, AbstractCentreBasedCellPopulation< ELEMENT_DIM, SPACE_DIM > &rCellPopulation)
static RandomNumberGenerator * Instance()