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671 | werner | 2 | /******************************************************************************************** |
3 | ** iLand - an individual based forest landscape and disturbance model |
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4 | ** http://iland.boku.ac.at |
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5 | ** Copyright (C) 2009- Werner Rammer, Rupert Seidl |
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6 | ** |
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7 | ** This program is free software: you can redistribute it and/or modify |
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8 | ** it under the terms of the GNU General Public License as published by |
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9 | ** the Free Software Foundation, either version 3 of the License, or |
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10 | ** (at your option) any later version. |
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11 | ** |
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12 | ** This program is distributed in the hope that it will be useful, |
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13 | ** but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | ** GNU General Public License for more details. |
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16 | ** |
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17 | ** You should have received a copy of the GNU General Public License |
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18 | ** along with this program. If not, see <http://www.gnu.org/licenses/>. |
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19 | ********************************************************************************************/ |
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20 | |||
15 | Werner | 21 | #ifndef GRID_H |
22 | #define GRID_H |
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23 | |||
22 | Werner | 24 | #include <QtCore> |
15 | Werner | 25 | |
26 | |||
27 | #include <stdexcept> |
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145 | Werner | 28 | #include <limits> |
150 | iland | 29 | #include <cstring> |
15 | Werner | 30 | |
373 | werner | 31 | #include "global.h" |
32 | |||
247 | werner | 33 | /** Grid class (template). |
697 | werner | 34 | @ingroup tools |
74 | Werner | 35 | Orientation |
656 | werner | 36 | The grid is oriented as typically coordinates on the northern hemisphere: higher y-values -> north, higher x-values-> east. |
490 | werner | 37 | The projection is reversed for drawing on screen (Viewport). |
74 | Werner | 38 | N |
490 | werner | 39 | (0/2) (1/2) (2/2) |
656 | werner | 40 | W (0/1) (1/1) (2/1) E |
74 | Werner | 41 | (0/0) (1/0) (2/0) |
42 | S |
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43 | */ |
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15 | Werner | 44 | template <class T> |
45 | class Grid { |
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46 | public: |
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47 | |||
48 | Grid(); |
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49 | Grid(int cellsize, int sizex, int sizey) { mData=0; setup(cellsize, sizex, sizey); } |
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58 | Werner | 50 | Grid(const QRectF rect_metric, const float cellsize) { mData=0; setup(rect_metric,cellsize); } |
33 | Werner | 51 | // copy ctor |
52 | Grid(const Grid<T>& toCopy); |
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105 | Werner | 53 | ~Grid() { clear(); } |
54 | void clear() { if (mData) delete[] mData; mData=0; } |
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15 | Werner | 55 | |
18 | Werner | 56 | bool setup(const float cellsize, const int sizex, const int sizey); |
22 | Werner | 57 | bool setup(const QRectF& rect, const double cellsize); |
453 | werner | 58 | bool setup(Grid<T>& source) { mData = 0; mRect = source.mRect; return setup(source.cellsize(), source.sizeX(), source.sizeY()); } |
75 | Werner | 59 | void initialize(const T& value) {for( T *p = begin();p!=end(); ++p) *p=value; } |
150 | iland | 60 | void wipe(); ///< write 0-bytes with memcpy to the whole area |
154 | werner | 61 | void wipe(const T value); ///< overwrite the whole area with "value" size of T must be the size of "int" ERRORNOUS!!! |
764 | werner | 62 | /// copies the content of the source grid to this grid. |
63 | /// no operation, if the grids are not of the same size. |
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64 | void copy(const Grid<T> source) { if (source.count()==count()) memcpy(mData, source.mData, count()*sizeof(T)); } |
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15 | Werner | 65 | |
797 | werner | 66 | // get the number of cells in x and y direction |
145 | Werner | 67 | int sizeX() const { return mSizeX; } |
68 | int sizeY() const { return mSizeY; } |
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797 | werner | 69 | // get the size of the grid in metric coordinates (x and y direction) |
145 | Werner | 70 | float metricSizeX() const { return mSizeX*mCellsize; } |
71 | float metricSizeY() const { return mSizeY*mCellsize; } |
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797 | werner | 72 | /// get the metric rectangle of the grid |
49 | Werner | 73 | QRectF metricRect() const { return mRect; } |
797 | werner | 74 | /// get the rectangle of the grid in terms of indices |
75 | QRect rectangle() const { return QRect(QPoint(0,0), QPoint(sizeX(), sizeY())); } |
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76 | /// get the length of one pixel of the grid |
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145 | Werner | 77 | float cellsize() const { return mCellsize; } |
373 | werner | 78 | int count() const { return mCount; } ///< returns the number of elements of the grid |
79 | bool isEmpty() const { return mData==NULL; } ///< returns false if the grid was not setup |
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32 | Werner | 80 | // operations |
15 | Werner | 81 | // query |
33 | Werner | 82 | /// access (const) with index variables. use int. |
83 | inline const T& operator()(const int ix, const int iy) const { return constValueAtIndex(ix, iy); } |
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84 | /// access (const) using metric variables. use float. |
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85 | inline const T& operator()(const float x, const float y) const { return constValueAt(x, y); } |
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48 | Werner | 86 | inline const T& operator[] (const QPointF &p) const { return constValueAt(p); } |
33 | Werner | 87 | |
705 | werner | 88 | inline T& valueAtIndex(const QPoint& pos) {return valueAtIndex(pos.x(), pos.y());} ///< value at position defined by a QPoint defining the two indices (x,y) |
89 | T& valueAtIndex(const int ix, const int iy) { return mData[iy*mSizeX + ix]; } ///< const value at position defined by indices (x,y) |
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285 | werner | 90 | T& valueAtIndex(const int index) {return mData[index]; } ///< get a ref ot value at (one-dimensional) index 'index'. |
33 | Werner | 91 | |
705 | werner | 92 | /// value at position defined by a (integer) QPoint |
93 | inline const T& constValueAtIndex(const QPoint& pos) const {return constValueAtIndex(pos.x(), pos.y()); } |
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94 | /// value at position defined by a pair of integer coordinates |
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95 | inline const T& constValueAtIndex(const int ix, const int iy) const { return mData[iy*mSizeX + ix]; } |
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96 | /// value at position defined by the index within the grid |
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549 | werner | 97 | const T& constValueAtIndex(const int index) const {return mData[index]; } ///< get a ref ot value at (one-dimensional) index 'index'. |
33 | Werner | 98 | |
99 | T& valueAt(const QPointF& posf); ///< value at position defined by metric coordinates (QPointF) |
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100 | const T& constValueAt(const QPointF& posf) const; ///< value at position defined by metric coordinates (QPointF) |
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101 | |||
102 | T& valueAt(const float x, const float y); ///< value at position defined by metric coordinates (x,y) |
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103 | const T& constValueAt(const float x, const float y) const; ///< value at position defined by metric coordinates (x,y) |
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104 | |||
105 | Werner | 105 | bool coordValid(const float x, const float y) const { return x>=mRect.left() && x<mRect.right() && y>=mRect.top() && y<mRect.bottom(); } |
49 | Werner | 106 | bool coordValid(const QPointF &pos) const { return coordValid(pos.x(), pos.y()); } |
75 | Werner | 107 | |
55 | Werner | 108 | QPoint indexAt(const QPointF& pos) const { return QPoint(int((pos.x()-mRect.left()) / mCellsize), int((pos.y()-mRect.top())/mCellsize)); } ///< get index of value at position pos (metric) |
538 | werner | 109 | /// get index (x/y) of the (linear) index 'index' (0..count-1) |
110 | QPoint indexOf(const int index) const {return QPoint(index % mSizeX, index / mSizeX); } |
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373 | werner | 111 | bool isIndexValid(const QPoint& pos) const { return (pos.x()>=0 && pos.x()<mSizeX && pos.y()>=0 && pos.y()<mSizeY); } ///< return true, if position is within the grid |
112 | bool isIndexValid(const int x, const int y) const {return (x>=0 && x<mSizeX && y>=0 && y<mSizeY); } ///< return true, if index is within the grid |
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75 | Werner | 113 | /// force @param pos to contain valid indices with respect to this grid. |
55 | Werner | 114 | void validate(QPoint &pos) const{ pos.setX( qMax(qMin(pos.x(), mSizeX-1), 0) ); pos.setY( qMax(qMin(pos.y(), mSizeY-1), 0) );} ///< ensure that "pos" is a valid key. if out of range, pos is set to minimum/maximum values. |
105 | Werner | 115 | /// get the (metric) centerpoint of cell with index @p pos |
549 | werner | 116 | QPointF cellCenterPoint(const QPoint &pos) const { return QPointF( (pos.x()+0.5)*mCellsize+mRect.left(), (pos.y()+0.5)*mCellsize + mRect.top());} ///< get metric coordinates of the cells center |
881 | werner | 117 | /// get the metric cell center point of the cell given by index 'index' |
118 | QPointF cellCenterPoint(const int &index) const { QPoint pos=indexOf(index); return QPointF( (pos.x()+0.5)*mCellsize+mRect.left(), (pos.y()+0.5)*mCellsize + mRect.top());} |
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105 | Werner | 119 | /// get the metric rectangle of the cell with index @pos |
439 | werner | 120 | QRectF cellRect(const QPoint &pos) const { QRectF r( QPointF(mRect.left() + mCellsize*pos.x(), mRect.top() + pos.y()*mCellsize), |
55 | Werner | 121 | QSizeF(mCellsize, mCellsize)); return r; } ///< return coordinates of rect given by @param pos. |
105 | Werner | 122 | |
27 | Werner | 123 | inline T* begin() const { return mData; } ///< get "iterator" pointer |
37 | Werner | 124 | inline T* end() const { return mEnd; } ///< get iterator end-pointer |
717 | werner | 125 | inline QPoint indexOf(const T* element) const; ///< retrieve index (x/y) of the pointer element. returns -1/-1 if element is not valid. |
27 | Werner | 126 | // special queries |
33 | Werner | 127 | T max() const; ///< retrieve the maximum value of a grid |
128 | T sum() const; ///< retrieve the sum of the grid |
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129 | T avg() const; ///< retrieve the average value of a grid |
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391 | werner | 130 | // modifying operations |
131 | void add(const T& summand); |
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132 | void multiply(const T& factor); |
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33 | Werner | 133 | /// creates a grid with lower resolution and averaged cell values. |
134 | /// @param factor factor by which grid size is reduced (e.g. 3 -> 3x3=9 pixels are averaged to 1 result pixel) |
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135 | /// @param offsetx, offsety: start averaging with an offset from 0/0 (e.g.: x=1, y=2, factor=3: -> 1/2-3/4 -> 0/0) |
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136 | /// @return Grid with size sizeX()/factor x sizeY()/factor |
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137 | Grid<T> averaged(const int factor, const int offsetx=0, const int offsety=0) const; |
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138 | /// normalized returns a normalized grid, in a way that the sum() = @param targetvalue. |
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139 | /// if the grid is empty or the sum is 0, no modifications are performed. |
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140 | Grid<T> normalized(const T targetvalue) const; |
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373 | werner | 141 | T* ptr(int x, int y) { return &(mData[y*mSizeX + x]); } ///< get a pointer to the element denoted by "x" and "y" |
142 | inline double distance(const QPoint &p1, const QPoint &p2); ///< distance (metric) between p1 and p2 |
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143 | const QPoint randomPosition() const; ///< returns a (valid) random position within the grid |
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15 | Werner | 144 | private: |
77 | Werner | 145 | |
15 | Werner | 146 | T* mData; |
37 | Werner | 147 | T* mEnd; ///< pointer to 1 element behind the last |
49 | Werner | 148 | QRectF mRect; |
36 | Werner | 149 | float mCellsize; ///< size of a cell in meter |
150 | int mSizeX; ///< count of cells in x-direction |
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151 | int mSizeY; ///< count of cells in y-direction |
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152 | int mCount; ///< total number of cells in the grid |
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15 | Werner | 153 | }; |
154 | |||
155 | typedef Grid<float> FloatGrid; |
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156 | |||
877 | werner | 157 | enum GridViewType { GridViewRainbow=0, GridViewRainbowReverse=1, GridViewGray=2, GridViewGrayReverse=3, GridViewHeat=14, |
880 | werner | 158 | GridViewBrewerDiv=10, GridViewBrewerQual=11, GridViewTerrain=12, GridViewCustom=14 }; |
643 | werner | 159 | |
438 | werner | 160 | /** @class GridRunner is a helper class to iterate over a rectangular fraction of a grid |
161 | */ |
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162 | template <class T> |
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163 | class GridRunner { |
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164 | public: |
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650 | werner | 165 | // constructors with a QRectF (metric coordinates) |
617 | werner | 166 | GridRunner(Grid<T> &target_grid, const QRectF &rectangle) {setup(&target_grid, rectangle);} |
167 | GridRunner(const Grid<T> &target_grid, const QRectF &rectangle) {setup(&target_grid, rectangle);} |
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168 | GridRunner(Grid<T> *target_grid, const QRectF &rectangle) {setup(target_grid, rectangle);} |
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650 | werner | 169 | // constructors with a QRect (indices within the grid) |
170 | GridRunner(Grid<T> &target_grid, const QRect &rectangle) {setup(&target_grid, rectangle);} |
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171 | GridRunner(const Grid<T> &target_grid, const QRect &rectangle) {setup(&target_grid, rectangle);} |
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172 | GridRunner(Grid<T> *target_grid, const QRect &rectangle) {setup(target_grid, rectangle);} |
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438 | werner | 173 | T* next(); ///< to to next element, return NULL if finished |
662 | werner | 174 | T* current() const { return mCurrent; } |
650 | werner | 175 | void reset() { mCurrent = mFirst-1; mCurrentCol = -1; } |
176 | // helpers |
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177 | /// fill array with pointers to neighbors (north, east, west, south) |
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178 | /// or Null-pointers if out of range. |
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179 | /// the target array (rArray) is not checked and must be valid! |
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180 | void neighbors4(T** rArray); |
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181 | void neighbors8(T** rArray); |
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438 | werner | 182 | private: |
617 | werner | 183 | void setup(const Grid<T> *target_grid, const QRectF &rectangle); |
650 | werner | 184 | void setup(const Grid<T> *target_grid, const QRect &rectangle); |
185 | T* mFirst; // points to the first element of the grid |
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186 | T* mLast; // points to the last element of the grid |
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438 | werner | 187 | T* mCurrent; |
188 | size_t mLineLength; |
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189 | size_t mCols; |
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190 | size_t mCurrentCol; |
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191 | }; |
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192 | |||
646 | werner | 193 | /** @class Vector3D is a simple 3d vector. |
194 | QVector3D (from Qt) is in QtGui so we needed a replacement. |
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195 | */ |
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196 | class Vector3D |
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197 | { |
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198 | public: |
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199 | Vector3D(): mX(0.), mY(0.), mZ(0.) {} |
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200 | Vector3D(const double x, const double y, const double z): mX(x), mY(y), mZ(z) {} |
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201 | double x() const { return mX; } ///< get x-coordinate |
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202 | double y() const { return mY; } ///< get y-coordinate |
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203 | double z() const { return mZ; } ///< get z-coordinate |
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204 | // set variables |
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205 | void setX(const double x) { mX=x; } ///< set value of the x-coordinate |
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206 | void setY(const double y) { mY=y; } ///< set value of the y-coordinate |
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207 | void setZ(const double z) { mZ=z; } ///< set value of the z-coordinate |
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208 | private: |
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209 | double mX; |
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210 | double mY; |
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211 | double mZ; |
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212 | }; |
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438 | werner | 213 | |
33 | Werner | 214 | // copy constructor |
215 | template <class T> |
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216 | Grid<T>::Grid(const Grid<T>& toCopy) |
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217 | { |
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40 | Werner | 218 | mData = 0; |
50 | Werner | 219 | mRect = toCopy.mRect; |
33 | Werner | 220 | setup(toCopy.cellsize(), toCopy.sizeX(), toCopy.sizeY()); |
221 | const T* end = toCopy.end(); |
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222 | T* ptr = begin(); |
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223 | for (T* i= toCopy.begin(); i!=end; ++i, ++ptr) |
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224 | *ptr = *i; |
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225 | } |
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22 | Werner | 226 | |
33 | Werner | 227 | // normalize function |
32 | Werner | 228 | template <class T> |
33 | Werner | 229 | Grid<T> Grid<T>::normalized(const T targetvalue) const |
32 | Werner | 230 | { |
33 | Werner | 231 | Grid<T> target(*this); |
232 | T total = sum(); |
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233 | T multiplier; |
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234 | if (total) |
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235 | multiplier = targetvalue / total; |
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236 | else |
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237 | return target; |
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238 | for (T* p=target.begin();p!=target.end();++p) |
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239 | *p *= multiplier; |
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40 | Werner | 240 | return target; |
33 | Werner | 241 | } |
242 | |||
243 | |||
244 | template <class T> |
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245 | Grid<T> Grid<T>::averaged(const int factor, const int offsetx, const int offsety) const |
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246 | { |
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32 | Werner | 247 | Grid<T> target; |
248 | target.setup(cellsize()*factor, sizeX()/factor, sizeY()/factor); |
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249 | int x,y; |
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250 | T sum=0; |
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251 | target.initialize(sum); |
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252 | // sum over array of 2x2, 3x3, 4x4, ... |
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253 | for (x=offsetx;x<mSizeX;x++) |
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254 | for (y=offsety;y<mSizeY;y++) { |
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255 | target.valueAtIndex((x-offsetx)/factor, (y-offsety)/factor) += constValueAtIndex(x,y); |
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256 | } |
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257 | // divide |
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258 | double fsquare = factor*factor; |
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259 | for (T* p=target.begin();p!=target.end();++p) |
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260 | *p /= fsquare; |
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261 | return target; |
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262 | } |
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22 | Werner | 263 | |
36 | Werner | 264 | |
27 | Werner | 265 | template <class T> |
33 | Werner | 266 | T& Grid<T>::valueAt(const float x, const float y) |
267 | { |
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268 | return valueAtIndex( indexAt(QPointF(x,y)) ); |
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269 | } |
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36 | Werner | 270 | |
33 | Werner | 271 | template <class T> |
272 | const T& Grid<T>::constValueAt(const float x, const float y) const |
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273 | { |
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274 | return constValueAtIndex( indexAt(QPointF(x,y)) ); |
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275 | } |
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36 | Werner | 276 | |
33 | Werner | 277 | template <class T> |
22 | Werner | 278 | T& Grid<T>::valueAt(const QPointF& posf) |
279 | { |
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280 | return valueAtIndex( indexAt(posf) ); |
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281 | } |
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36 | Werner | 282 | |
33 | Werner | 283 | template <class T> |
284 | const T& Grid<T>::constValueAt(const QPointF& posf) const |
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285 | { |
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286 | return constValueAtIndex( indexAt(posf) ); |
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287 | } |
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22 | Werner | 288 | |
289 | template <class T> |
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15 | Werner | 290 | Grid<T>::Grid() |
291 | { |
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37 | Werner | 292 | mData = 0; mCellsize=0.f; |
293 | mEnd = 0; |
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15 | Werner | 294 | } |
295 | |||
296 | template <class T> |
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18 | Werner | 297 | bool Grid<T>::setup(const float cellsize, const int sizex, const int sizey) |
15 | Werner | 298 | { |
37 | Werner | 299 | mSizeX=sizex; mSizeY=sizey; mCellsize=cellsize; |
50 | Werner | 300 | if (mRect.isNull()) // only set rect if not set before |
301 | mRect.setCoords(0., 0., cellsize*sizex, cellsize*sizey); |
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15 | Werner | 302 | mCount = mSizeX*mSizeY; |
37 | Werner | 303 | if (mData) { |
304 | delete[] mData; mData=NULL; |
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305 | } |
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15 | Werner | 306 | if (mCount>0) |
37 | Werner | 307 | mData = new T[mCount]; |
308 | mEnd = &(mData[mCount]); |
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15 | Werner | 309 | return true; |
310 | } |
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311 | |||
312 | template <class T> |
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22 | Werner | 313 | bool Grid<T>::setup(const QRectF& rect, const double cellsize) |
15 | Werner | 314 | { |
49 | Werner | 315 | mRect = rect; |
22 | Werner | 316 | int dx = int(rect.width()/cellsize); |
49 | Werner | 317 | if (mRect.left()+cellsize*dx<rect.right()) |
22 | Werner | 318 | dx++; |
319 | int dy = int(rect.height()/cellsize); |
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49 | Werner | 320 | if (mRect.top()+cellsize*dy<rect.bottom()) |
22 | Werner | 321 | dy++; |
322 | return setup(cellsize, dx, dy); |
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15 | Werner | 323 | } |
324 | |||
261 | werner | 325 | /** retrieve from the index from an element reversely from a pointer to that element. |
326 | The internal memory layout is (for dimx=6, dimy=3): |
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327 | |||
328 | 6 7 8 9 10 11 |
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329 | 12 13 14 15 16 17 |
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330 | Note: north and south are reversed, thus the item with index 0 is located in the south-western edge of the grid! */ |
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487 | werner | 331 | template <class T> inline |
717 | werner | 332 | QPoint Grid<T>::indexOf(const T* element) const |
25 | Werner | 333 | { |
487 | werner | 334 | // QPoint result(-1,-1); |
25 | Werner | 335 | if (element==NULL || element<mData || element>=end()) |
487 | werner | 336 | return QPoint(-1, -1); |
25 | Werner | 337 | int idx = element - mData; |
487 | werner | 338 | return QPoint(idx % mSizeX, idx / mSizeX); |
339 | // result.setX( idx % mSizeX); |
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340 | // result.setY( idx / mSizeX); |
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341 | // return result; |
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25 | Werner | 342 | } |
22 | Werner | 343 | |
27 | Werner | 344 | template <class T> |
345 | T Grid<T>::max() const |
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346 | { |
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143 | Werner | 347 | T maxv = -std::numeric_limits<T>::max(); |
27 | Werner | 348 | T* p; |
349 | T* pend = end(); |
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350 | for (p=begin(); p!=pend;++p) |
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351 | maxv = std::max(maxv, *p); |
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352 | return maxv; |
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353 | } |
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354 | |||
33 | Werner | 355 | template <class T> |
356 | T Grid<T>::sum() const |
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357 | { |
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358 | T* pend = end(); |
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359 | T total = 0; |
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360 | for (T *p=begin(); p!=pend;++p) |
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361 | total += *p; |
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362 | return total; |
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363 | } |
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364 | |||
365 | template <class T> |
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366 | T Grid<T>::avg() const |
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367 | { |
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368 | if (count()) |
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369 | return sum() / T(count()); |
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370 | else return 0; |
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371 | } |
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372 | |||
150 | iland | 373 | template <class T> |
391 | werner | 374 | void Grid<T>::add(const T& summand) |
375 | { |
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376 | T* pend = end(); |
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377 | for (T *p=begin(); p!=pend;*p+=summand,++p) |
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378 | ; |
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379 | } |
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380 | |||
381 | template <class T> |
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382 | void Grid<T>::multiply(const T& factor) |
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383 | { |
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384 | T* pend = end(); |
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385 | for (T *p=begin(); p!=pend;*p*=factor,++p) |
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386 | ; |
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387 | } |
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388 | |||
389 | |||
390 | |||
391 | template <class T> |
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150 | iland | 392 | void Grid<T>::wipe() |
393 | { |
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394 | memset(mData, 0, mCount*sizeof(T)); |
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395 | } |
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396 | template <class T> |
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397 | void Grid<T>::wipe(const T value) |
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398 | { |
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154 | werner | 399 | /* this does not work properly !!! */ |
153 | werner | 400 | if (sizeof(T)==sizeof(int)) { |
401 | float temp = value; |
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402 | float *pf = &temp; |
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403 | |||
404 | memset(mData, *((int*)pf), mCount*sizeof(T)); |
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405 | } else |
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150 | iland | 406 | initialize(value); |
407 | } |
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408 | |||
373 | werner | 409 | template <class T> |
410 | double Grid<T>::distance(const QPoint &p1, const QPoint &p2) |
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411 | { |
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412 | QPointF fp1=cellCenterPoint(p1); |
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413 | QPointF fp2=cellCenterPoint(p2); |
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414 | double distance = sqrt( (fp1.x()-fp2.x())*(fp1.x()-fp2.x()) + (fp1.y()-fp2.y())*(fp1.y()-fp2.y())); |
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415 | return distance; |
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416 | } |
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417 | |||
418 | template <class T> |
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419 | const QPoint Grid<T>::randomPosition() const |
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420 | { |
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421 | return QPoint(irandom(0,mSizeX-1), irandom(0, mSizeY-1)); |
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422 | } |
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438 | werner | 423 | |
373 | werner | 424 | //////////////////////////////////////////////////////////// |
438 | werner | 425 | // grid runner |
426 | //////////////////////////////////////////////////////////// |
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427 | template <class T> |
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650 | werner | 428 | void GridRunner<T>::setup(const Grid<T> *target_grid, const QRect &rectangle) |
438 | werner | 429 | { |
650 | werner | 430 | QPoint upper_left = rectangle.topLeft(); |
651 | werner | 431 | // due to the strange behavior of QRect::bottom() and right(): |
650 | werner | 432 | QPoint lower_right = rectangle.bottomRight(); |
617 | werner | 433 | mCurrent = const_cast<Grid<T> *>(target_grid)->ptr(upper_left.x(), upper_left.y()); |
650 | werner | 434 | mFirst = mCurrent; |
585 | werner | 435 | mCurrent--; // point to first element -1 |
617 | werner | 436 | mLast = const_cast<Grid<T> *>(target_grid)->ptr(lower_right.x()-1, lower_right.y()-1); |
438 | werner | 437 | mCols = lower_right.x() - upper_left.x(); // |
617 | werner | 438 | mLineLength = target_grid->sizeX() - mCols; |
585 | werner | 439 | mCurrentCol = -1; |
440 | // qDebug() << "GridRunner: rectangle:" << rectangle |
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441 | // << "upper_left:" << target_grid.cellCenterPoint(target_grid.indexOf(mCurrent)) |
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442 | // << "lower_right:" << target_grid.cellCenterPoint(target_grid.indexOf(mLast)); |
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438 | werner | 443 | } |
444 | |||
445 | template <class T> |
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650 | werner | 446 | void GridRunner<T>::setup(const Grid<T> *target_grid, const QRectF &rectangle_metric) |
447 | { |
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448 | QRect rect(target_grid->indexAt(rectangle_metric.topLeft()), |
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449 | target_grid->indexAt(rectangle_metric.bottomRight()) ); |
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450 | setup (target_grid, rect); |
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451 | } |
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452 | |||
453 | template <class T> |
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438 | werner | 454 | T* GridRunner<T>::next() |
455 | { |
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456 | if (mCurrent>mLast) |
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457 | return NULL; |
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458 | mCurrent++; |
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459 | mCurrentCol++; |
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585 | werner | 460 | |
438 | werner | 461 | if (mCurrentCol >= mCols) { |
462 | mCurrent += mLineLength; // skip to next line |
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463 | mCurrentCol = 0; |
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464 | } |
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585 | werner | 465 | if (mCurrent>mLast) |
466 | return NULL; |
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467 | else |
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468 | return mCurrent; |
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438 | werner | 469 | } |
470 | |||
650 | werner | 471 | template <class T> |
656 | werner | 472 | /// get pointers the the 4-neighborhood |
473 | /// north, east, south, west |
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803 | werner | 474 | /// 0-pointers are returned for edge pixels. |
650 | werner | 475 | void GridRunner<T>::neighbors4(T** rArray) |
476 | { |
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477 | // north: |
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651 | werner | 478 | rArray[0] = mCurrent + mCols + mLineLength > mLast?0: mCurrent + mCols + mLineLength; |
650 | werner | 479 | // south: |
651 | werner | 480 | rArray[3] = mCurrent - (mCols + mLineLength) < mFirst?0: mCurrent - (mCols + mLineLength); |
650 | werner | 481 | // east / west |
656 | werner | 482 | rArray[1] = mCurrentCol<mCols? mCurrent + 1 : 0; |
483 | rArray[2] = mCurrentCol>0? mCurrent-1 : 0; |
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650 | werner | 484 | } |
485 | |||
486 | /// get pointers to the 8-neighbor-hood |
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487 | /// north/east/west/south/NE/NW/SE/SW |
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803 | werner | 488 | /// 0-pointers are returned for edge pixels. |
650 | werner | 489 | template <class T> |
490 | void GridRunner<T>::neighbors8(T** rArray) |
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491 | { |
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492 | neighbors4(rArray); |
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493 | // north-east |
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656 | werner | 494 | rArray[4] = rArray[0] && rArray[1]? rArray[0]+1: 0; |
650 | werner | 495 | // north-west |
656 | werner | 496 | rArray[5] = rArray[0] && rArray[2]? rArray[0]-1: 0; |
650 | werner | 497 | // south-east |
656 | werner | 498 | rArray[6] = rArray[3] && rArray[1]? rArray[3]+1: 0; |
650 | werner | 499 | // south-west |
656 | werner | 500 | rArray[7] = rArray[3] && rArray[2]? rArray[3]-1: 0; |
650 | werner | 501 | |
502 | } |
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503 | |||
438 | werner | 504 | //////////////////////////////////////////////////////////// |
36 | Werner | 505 | // global functions |
373 | werner | 506 | //////////////////////////////////////////////////////////// |
36 | Werner | 507 | |
508 | /// dumps a FloatGrid to a String. |
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46 | Werner | 509 | /// rows will be y-lines, columns x-values. (see grid.cpp) |
599 | werner | 510 | QString gridToString(const FloatGrid &grid, const QChar sep=QChar(';'), const int newline_after=-1); |
36 | Werner | 511 | |
512 | /// creates and return a QImage from Grid-Data. |
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513 | /// @param black_white true: max_value = white, min_value = black, false: color-mode: uses a HSV-color model from blue (min_value) to red (max_value), default: color mode (false) |
||
514 | /// @param min_value, max_value min/max bounds for color calcuations. values outside bounds are limited to these values. defaults: min=0, max=1 |
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515 | /// @param reverse if true, color ramps are inversed (to: min_value = white (black and white mode) or red (color mode). default = false. |
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516 | /// @return a QImage with the Grids size of pixels. Pixel coordinates relate to the index values of the grid. |
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517 | QImage gridToImage(const FloatGrid &grid, |
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518 | bool black_white=false, |
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519 | double min_value=0., double max_value=1., |
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520 | bool reverse=false); |
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521 | |||
556 | werner | 522 | |
285 | werner | 523 | /** load into 'rGrid' the content of the image pointed at by 'fileName'. |
524 | Pixels are converted to grey-scale and then transformend to a value ranging from 0..1 (black..white). |
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525 | */ |
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526 | bool loadGridFromImage(const QString &fileName, FloatGrid &rGrid); |
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527 | |||
46 | Werner | 528 | /// template version for non-float grids (see also version for FloatGrid) |
599 | werner | 529 | /// @param sep string separator |
530 | /// @param newline_after if <>-1 a newline is added after every 'newline_after' data values |
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36 | Werner | 531 | template <class T> |
599 | werner | 532 | QString gridToString(const Grid<T> &grid, const QChar sep=QChar(';'), const int newline_after=-1) |
36 | Werner | 533 | { |
534 | QString res; |
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535 | QTextStream ts(&res); |
||
536 | |||
599 | werner | 537 | int newl_counter = newline_after; |
708 | werner | 538 | for (int y=grid.sizeY()-1;y>=0;--y){ |
46 | Werner | 539 | for (int x=0;x<grid.sizeX();x++){ |
599 | werner | 540 | ts << grid.constValueAtIndex(x,y) << sep; |
541 | if (--newl_counter==0) { |
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542 | ts << "\r\n"; |
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543 | newl_counter = newline_after; |
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544 | } |
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36 | Werner | 545 | } |
546 | ts << "\r\n"; |
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547 | } |
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548 | |||
549 | return res; |
||
550 | } |
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46 | Werner | 551 | |
599 | werner | 552 | /// template version for non-float grids (see also version for FloatGrid) |
553 | /// @param valueFunction pointer to a function with the signature: QString func(const T&) : this should return a QString |
||
554 | /// @param sep string separator |
||
555 | /// @param newline_after if <>-1 a newline is added after every 'newline_after' data values |
||
556 | template <class T> |
||
557 | QString gridToString(const Grid<T> &grid, QString (*valueFunction)(const T& value), const QChar sep=QChar(';'), const int newline_after=-1 ) |
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708 | werner | 558 | { |
559 | QString res; |
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560 | QTextStream ts(&res); |
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599 | werner | 561 | |
708 | werner | 562 | int newl_counter = newline_after; |
563 | for (int y=grid.sizeY()-1;y>=0;--y){ |
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564 | for (int x=0;x<grid.sizeX();x++){ |
||
565 | ts << (*valueFunction)(grid.constValueAtIndex(x,y)) << sep; |
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599 | werner | 566 | |
708 | werner | 567 | if (--newl_counter==0) { |
568 | ts << "\r\n"; |
||
569 | newl_counter = newline_after; |
||
570 | } |
||
571 | } |
||
599 | werner | 572 | ts << "\r\n"; |
573 | } |
||
708 | werner | 574 | |
575 | return res; |
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599 | werner | 576 | } |
646 | werner | 577 | void modelToWorld(const Vector3D &From, Vector3D &To); |
599 | werner | 578 | |
579 | template <class T> |
||
580 | QString gridToESRIRaster(const Grid<T> &grid, QString (*valueFunction)(const T& value) ) |
||
581 | { |
||
646 | werner | 582 | Vector3D model(grid.metricRect().left(), grid.metricRect().top(), 0.); |
583 | Vector3D world; |
||
599 | werner | 584 | modelToWorld(model, world); |
607 | werner | 585 | QString result = QString("ncols %1\r\nnrows %2\r\nxllcorner %3\r\nyllcorner %4\r\ncellsize %5\r\nNODATA_value %6\r\n") |
599 | werner | 586 | .arg(grid.sizeX()) |
587 | .arg(grid.sizeY()) |
||
600 | werner | 588 | .arg(world.x(),0,'f').arg(world.y(),0,'f') |
599 | werner | 589 | .arg(grid.cellsize()).arg(-9999); |
694 | werner | 590 | QString line = gridToString(grid, valueFunction, QChar(' ')); // for special grids |
591 | return result + line; |
||
592 | } |
||
599 | werner | 593 | |
594 | template <class T> |
||
595 | QString gridToESRIRaster(const Grid<T> &grid ) |
||
596 | { |
||
646 | werner | 597 | Vector3D model(grid.metricRect().left(), grid.metricRect().top(), 0.); |
598 | Vector3D world; |
||
599 | werner | 599 | modelToWorld(model, world); |
683 | werner | 600 | QString result = QString("ncols %1\r\nnrows %2\r\nxllcorner %3\r\nyllcorner %4\r\ncellsize %5\r\nNODATA_value %6\r\n") |
599 | werner | 601 | .arg(grid.sizeX()) |
602 | .arg(grid.sizeY()) |
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680 | werner | 603 | .arg(world.x(),0,'f').arg(world.y(),0,'f') |
599 | werner | 604 | .arg(grid.cellsize()).arg(-9999); |
694 | werner | 605 | QString line = gridToString(grid, QChar(' ')); // for normal grids (e.g. float) |
606 | return result + line; |
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599 | werner | 607 | } |
608 | |||
15 | Werner | 609 | #endif // GRID_H |