blob: a6c41ba3e6f73e88a8086ddeb92e48fdeb5a8502 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
#pragma once
#include <fstream>
#include <memory>
#include "vector.h"
using Velocity = Vector<double>;
using Density = double;
class FluidBuffer {
private:
const std::size_t dim_x_;
const std::size_t dim_y_;
std::unique_ptr<Density[]> density_;
std::unique_ptr<Velocity[]> velocity_;
public:
FluidBuffer(std::size_t dimX, std::size_t dimY):
dim_x_(dimX),
dim_y_(dimY),
density_(new Density[dimX*dimY]),
velocity_(new Velocity[dimX*dimY]) { }
std::size_t dimX() const {
return dim_x_;
}
std::size_t dimY() const {
return dim_y_;
}
Density& density(std::size_t x, std::size_t y) {
return density_[y*dim_x_ + x];
}
Density& curr(Vector<std::size_t> pos) {
return density(pos[0], pos[1]);
}
Velocity& velocity(std::size_t x, std::size_t y) {
return velocity_[y*dim_x_ + x];
}
Velocity& velocity(Vector<std::size_t> pos) {
return velocity(pos[0], pos[1]);
}
void writeAsVTK(int time) {
std::ofstream fout;
fout.open(("result/data_t" + std::to_string(time) + ".vtk").c_str());
fout << "# vtk DataFile Version 3.0\n";
fout << "lbm_output\n";
fout << "ASCII\n";
fout << "DATASET RECTILINEAR_GRID\n";
fout << "DIMENSIONS " << dimX() << " " << dimY() << " 1" << "\n";
fout << "X_COORDINATES " << dimX() << " float\n";
for( std::size_t x = 0; x < dimX(); ++x ) {
fout << x << " ";
}
fout << "\nY_COORDINATES " << dimY() << " float\n";
for( std::size_t y = 0; y < dimY(); ++y ) {
fout << y << " ";
}
fout << "\nZ_COORDINATES " << 1 << " float\n";
fout << 0 << "\n";
fout << "POINT_DATA " << dimX() * dimY() << "\n";
fout << "VECTORS velocity float\n";
for ( std::size_t y = 0; y < dimY(); ++y ) {
for ( std::size_t x = 0; x < dimX(); ++x ) {
fout << velocity(x,y)[0] << " " << velocity(x,y)[1] << " 0\n";
}
}
fout << "SCALARS density float 1\n";
fout << "LOOKUP_TABLE default\n";
for ( std::size_t y = 0; y < dimY(); ++y ) {
for ( std::size_t x = 0; x < dimX(); ++x ) {
fout << density(x,y) << "\n";
}
}
fout.close();
}
};
|
