/usr/include/blasr/algorithms/alignment/GraphPaperImpl.hpp is in libblasr-dev 0~20151014+gitbe5d1bf-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 | #ifndef GRAPH_PAPER_IMPL_HPP_
#define GRAPH_PAPER_IMPL_HPP_
template<typename T_Point>
bool SetBounds(vector<T_Point> &points, DNALength &minPos, DNALength &maxPos, int axis) {
int i;
DNALength maxRow = 0;
if (points.size() == 0) {
return false;
}
else {
if (axis == 0) {
minPos = maxPos = points[0].GetX();
}
else {
minPos = maxPos = points[0].GetY();
}
}
for (i = 1; i < points.size(); i++) {
DNALength curPos;
if (axis == 0) {
curPos = points[i].GetX();
}
else {
curPos = points[i].GetY();
}
if (curPos < minPos) {
minPos = curPos;
}
else if (curPos > maxPos) {
maxPos = curPos;
}
}
}
inline int GetIndex(DNALength pos, DNALength minPos, DNALength maxPos, int nBins) {
assert(maxPos != minPos);
float diff = pos - minPos;
float len = maxPos - minPos;
float ratio = diff/len;
return min((DNALength)(nBins-1),
((DNALength)(ratio * nBins)));
}
template<typename T_Point>
int GraphPaper(vector<T_Point> &points,
int nRows, int nCols,
FlatMatrix2D<int> &bins,
FlatMatrix2D<int> &scoreMat,
FlatMatrix2D<Arrow> &pathMat,
vector<bool> &onOptPath) {
bins.Resize(nRows, nCols);
bins.Fill(0);
scoreMat.Resize(nRows+1, nCols+1);
pathMat.Resize(nRows+1, nCols+1);
scoreMat.Fill(0);
pathMat.Fill(NoArrow);
onOptPath.resize(points.size());
fill(onOptPath.begin(), onOptPath.end(), false);
DNALength xMin, xMax, yMin, yMax;
SetBounds(points, xMin, xMax, 0);
xMax++; // make half-open interval.
SetBounds(points, yMin, yMax, 1);
yMax++; // ditto.
//
// First set up the grid to optimize over.
//
int i;
for (i = 0; i < points.size(); i++) {
int rowIndex = GetIndex(points[i].GetX(), xMin, xMax, nRows);
int colIndex = GetIndex(points[i].GetY(), yMin, yMax, nCols);
bins[rowIndex][colIndex]+= points[i].length;
}
//
// Now optimize using DP.
//
// First handle boundary strips
int r, c;
for (r = 1; r < nRows+1; r++) {
scoreMat[r][0] = 0;
pathMat[r][0] = Up;
}
for (c = 1; c < nCols+1; c++) {
scoreMat[0][c] = 0;
pathMat[0][c] = Left;
}
scoreMat[0][0] = 0;
for (r = 1; r < nRows + 1; r++) {
for (c = 1; c < nCols + 1; c++) {
int diagScore, leftScore, upScore;
diagScore = scoreMat[r-1][c-1];
leftScore = scoreMat[r][c-1];
upScore = scoreMat[r-1][c];
int optScore;
Arrow optDir;
if (diagScore >= leftScore and
diagScore >= upScore) {
optScore = diagScore;
optDir = Diagonal;
}
else if (leftScore >= diagScore and
leftScore >= upScore) {
optScore = leftScore;
optDir = Left;
}
else {
optScore = upScore;
optDir = Up;
}
scoreMat[r][c] = optScore + bins[r-1][c-1];
pathMat[r][c] = optDir;
}
}
r = nRows; c = nCols;
while (r > 0 or c > 0) {
Arrow dir = pathMat[r][c];
pathMat[r][c] = Star;
if (dir == Diagonal) { r--; c--; }
else if (dir == Left) { c--; }
else if (dir == Up) { r--; }
if (r == 0 and c == 0) { break; }
}
//
// Now mark inclusion/exclusion from matrix.
//
int nOpt = 0;
for (i = 0; i < points.size(); i++) {
int rowIndex = GetIndex(points[i].GetX(), xMin, xMax, nRows);
int colIndex = GetIndex(points[i].GetY(), yMin, yMax, nCols);
if (pathMat[rowIndex+1][colIndex+1] == Star) {
onOptPath[i] = true;
}
else if (pathMat[rowIndex][colIndex+1] == Star) {
onOptPath[i] = true;
}
else if (rowIndex + 2 < nRows and pathMat[rowIndex+2][colIndex+1] == Star) {
onOptPath[i] = true;
}
else if (pathMat[rowIndex+1][colIndex] == Star) {
onOptPath[i] = true;
}
else if (colIndex < nCols + 2 and pathMat[rowIndex+1][colIndex+2] == Star) {
onOptPath[i] = true;
}
if (onOptPath[i]) {
++nOpt;
}
}
return nOpt;
}
template<typename T_Point>
void RemoveOffOpt(vector<T_Point> &points, vector<bool> &optPath) {
int i, c;
for (i = 0, c = 0; i < points.size(); i++) {
if (optPath[i]) {
points[c] = points[i];
c++;
}
}
points.resize(c);
}
#endif
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