Rev 75 | Rev 80 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
1 | |||
15 | Werner | 2 | #ifndef GRID_H |
3 | #define GRID_H |
||
4 | |||
22 | Werner | 5 | #include <QtCore> |
15 | Werner | 6 | |
7 | |||
8 | #include <stdexcept> |
||
9 | |||
74 | Werner | 10 | /** @class Grid class (template). |
15 | Werner | 11 | |
74 | Werner | 12 | Orientation |
13 | The grid is oriented as typically coordinates on the northern hemisphere: greater y-values -> north, greater x-values-> east. |
||
14 | The projection is reversed for drawing on screen (Viewport): |
||
15 | N |
||
16 | (2/0) (2/1) (2/2) |
||
17 | E (1/0) (1/1) (2/1) W |
||
18 | (0/0) (1/0) (2/0) |
||
19 | S |
||
20 | */ |
||
15 | Werner | 21 | template <class T> |
22 | class Grid { |
||
23 | public: |
||
24 | |||
25 | Grid(); |
||
26 | Grid(int cellsize, int sizex, int sizey) { mData=0; setup(cellsize, sizex, sizey); } |
||
58 | Werner | 27 | Grid(const QRectF rect_metric, const float cellsize) { mData=0; setup(rect_metric,cellsize); } |
33 | Werner | 28 | // copy ctor |
29 | Grid(const Grid<T>& toCopy); |
||
15 | Werner | 30 | ~Grid() { if (mData) delete[] mData; } |
31 | |||
18 | Werner | 32 | bool setup(const float cellsize, const int sizex, const int sizey); |
22 | Werner | 33 | bool setup(const QRectF& rect, const double cellsize); |
75 | Werner | 34 | void initialize(const T& value) {for( T *p = begin();p!=end(); ++p) *p=value; } |
15 | Werner | 35 | |
36 | const int sizeX() const { return mSizeX; } |
||
37 | const int sizeY() const { return mSizeY; } |
||
38 | const float metricSizeX() const { return mSizeX*mCellsize; } |
||
39 | const float metricSizeY() const { return mSizeY*mCellsize; } |
||
49 | Werner | 40 | QRectF metricRect() const { return mRect; } |
15 | Werner | 41 | const float cellsize() const { return mCellsize; } |
27 | Werner | 42 | const int count() const { return mCount; } |
49 | Werner | 43 | const bool isEmpty() const { return mData==NULL; } |
32 | Werner | 44 | // operations |
15 | Werner | 45 | // query |
33 | Werner | 46 | /// access (const) with index variables. use int. |
47 | inline const T& operator()(const int ix, const int iy) const { return constValueAtIndex(ix, iy); } |
||
48 | /// access (const) using metric variables. use float. |
||
49 | inline const T& operator()(const float x, const float y) const { return constValueAt(x, y); } |
||
48 | Werner | 50 | inline const T& operator[] (const QPointF &p) const { return constValueAt(p); } |
33 | Werner | 51 | |
77 | Werner | 52 | inline T& valueAtIndex(const QPoint& pos); ///< value at position defined by indices (x,y) |
33 | Werner | 53 | T& valueAtIndex(const int ix, const int iy) { return valueAtIndex(QPoint(ix,iy)); } ///< const value at position defined by indices (x,y) |
54 | |||
55 | const T& constValueAtIndex(const QPoint& pos) const; ///< value at position defined by a (integer) QPoint |
||
32 | Werner | 56 | const T& constValueAtIndex(const int ix, const int iy) const { return constValueAtIndex(QPoint(ix,iy)); } |
33 | Werner | 57 | |
58 | T& valueAt(const QPointF& posf); ///< value at position defined by metric coordinates (QPointF) |
||
59 | const T& constValueAt(const QPointF& posf) const; ///< value at position defined by metric coordinates (QPointF) |
||
60 | |||
61 | T& valueAt(const float x, const float y); ///< value at position defined by metric coordinates (x,y) |
||
62 | const T& constValueAt(const float x, const float y) const; ///< value at position defined by metric coordinates (x,y) |
||
63 | |||
49 | Werner | 64 | bool coordValid(const float x, const float y) const { return mRect.contains(x,y); } |
65 | bool coordValid(const QPointF &pos) const { return coordValid(pos.x(), pos.y()); } |
||
75 | Werner | 66 | |
55 | Werner | 67 | 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) |
68 | bool isIndexValid(const QPoint& pos) const { return (pos.x()>=0 && pos.x()<mSizeX && pos.y()>=0 && pos.y()<mSizeY); } ///< get index of value at position pos (index) |
||
75 | Werner | 69 | /// force @param pos to contain valid indices with respect to this grid. |
55 | Werner | 70 | 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. |
71 | QPointF cellCoordinates(const QPoint &pos) { return QPointF( (pos.x()+0.5)*mCellsize+mRect.left(), (pos.y()+0.5)*mCellsize + mRect.top());} ///< get metric coordinates of the cells center |
||
72 | QRectF cellRect(const QPoint &pos) { QRectF r( QPointF(mRect.left() + mCellsize*pos.x(), mRect.top() + pos.y()*mCellsize), |
||
73 | QSizeF(mCellsize, mCellsize)); return r; } ///< return coordinates of rect given by @param pos. |
||
27 | Werner | 74 | inline T* begin() const { return mData; } ///< get "iterator" pointer |
37 | Werner | 75 | inline T* end() const { return mEnd; } ///< get iterator end-pointer |
27 | Werner | 76 | QPoint indexOf(T* element) const; ///< retrieve index (x/y) of the pointer element. returns -1/-1 if element is not valid. |
77 | // special queries |
||
33 | Werner | 78 | T max() const; ///< retrieve the maximum value of a grid |
79 | T sum() const; ///< retrieve the sum of the grid |
||
80 | T avg() const; ///< retrieve the average value of a grid |
||
81 | /// creates a grid with lower resolution and averaged cell values. |
||
82 | /// @param factor factor by which grid size is reduced (e.g. 3 -> 3x3=9 pixels are averaged to 1 result pixel) |
||
83 | /// @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) |
||
84 | /// @return Grid with size sizeX()/factor x sizeY()/factor |
||
85 | Grid<T> averaged(const int factor, const int offsetx=0, const int offsety=0) const; |
||
86 | /// normalized returns a normalized grid, in a way that the sum() = @param targetvalue. |
||
87 | /// if the grid is empty or the sum is 0, no modifications are performed. |
||
88 | Grid<T> normalized(const T targetvalue) const; |
||
77 | Werner | 89 | T* ptr(int x, int y) { return &(mData[y*mSizeX + x]); } |
15 | Werner | 90 | private: |
77 | Werner | 91 | |
15 | Werner | 92 | T* mData; |
37 | Werner | 93 | T* mEnd; ///< pointer to 1 element behind the last |
49 | Werner | 94 | QRectF mRect; |
36 | Werner | 95 | float mCellsize; ///< size of a cell in meter |
96 | int mSizeX; ///< count of cells in x-direction |
||
97 | int mSizeY; ///< count of cells in y-direction |
||
98 | int mCount; ///< total number of cells in the grid |
||
15 | Werner | 99 | }; |
100 | |||
101 | typedef Grid<float> FloatGrid; |
||
102 | |||
33 | Werner | 103 | // copy constructor |
104 | template <class T> |
||
105 | Grid<T>::Grid(const Grid<T>& toCopy) |
||
106 | { |
||
40 | Werner | 107 | mData = 0; |
50 | Werner | 108 | mRect = toCopy.mRect; |
33 | Werner | 109 | setup(toCopy.cellsize(), toCopy.sizeX(), toCopy.sizeY()); |
110 | const T* end = toCopy.end(); |
||
111 | T* ptr = begin(); |
||
112 | for (T* i= toCopy.begin(); i!=end; ++i, ++ptr) |
||
113 | *ptr = *i; |
||
114 | } |
||
22 | Werner | 115 | |
33 | Werner | 116 | // normalize function |
32 | Werner | 117 | template <class T> |
33 | Werner | 118 | Grid<T> Grid<T>::normalized(const T targetvalue) const |
32 | Werner | 119 | { |
33 | Werner | 120 | Grid<T> target(*this); |
121 | T total = sum(); |
||
122 | T multiplier; |
||
123 | if (total) |
||
124 | multiplier = targetvalue / total; |
||
125 | else |
||
126 | return target; |
||
127 | for (T* p=target.begin();p!=target.end();++p) |
||
128 | *p *= multiplier; |
||
40 | Werner | 129 | return target; |
33 | Werner | 130 | } |
131 | |||
132 | |||
133 | template <class T> |
||
134 | Grid<T> Grid<T>::averaged(const int factor, const int offsetx, const int offsety) const |
||
135 | { |
||
32 | Werner | 136 | Grid<T> target; |
137 | target.setup(cellsize()*factor, sizeX()/factor, sizeY()/factor); |
||
138 | int x,y; |
||
139 | T sum=0; |
||
140 | target.initialize(sum); |
||
141 | // sum over array of 2x2, 3x3, 4x4, ... |
||
142 | for (x=offsetx;x<mSizeX;x++) |
||
143 | for (y=offsety;y<mSizeY;y++) { |
||
144 | target.valueAtIndex((x-offsetx)/factor, (y-offsety)/factor) += constValueAtIndex(x,y); |
||
145 | } |
||
146 | // divide |
||
147 | double fsquare = factor*factor; |
||
148 | for (T* p=target.begin();p!=target.end();++p) |
||
149 | *p /= fsquare; |
||
150 | return target; |
||
151 | } |
||
22 | Werner | 152 | |
15 | Werner | 153 | template <class T> |
22 | Werner | 154 | T& Grid<T>::valueAtIndex(const QPoint& pos) |
155 | { |
||
75 | Werner | 156 | //if (isIndexValid(pos)) { |
77 | Werner | 157 | return mData[pos.y()*mSizeX + pos.x()]; |
75 | Werner | 158 | //} |
159 | //qCritical("Grid::valueAtIndex. invalid: %d/%d", pos.x(), pos.y()); |
||
160 | //return mData[0]; |
||
22 | Werner | 161 | } |
36 | Werner | 162 | |
27 | Werner | 163 | template <class T> |
164 | const T& Grid<T>::constValueAtIndex(const QPoint& pos) const |
||
165 | { |
||
75 | Werner | 166 | //if (isIndexValid(pos)) { |
77 | Werner | 167 | return mData[pos.y()*mSizeX + pos.x()]; |
75 | Werner | 168 | //} |
169 | //qCritical("Grid::constValueAtIndex. invalid: %d/%d", pos.x(), pos.y()); |
||
170 | //return mData[0]; |
||
27 | Werner | 171 | } |
22 | Werner | 172 | |
173 | template <class T> |
||
33 | Werner | 174 | T& Grid<T>::valueAt(const float x, const float y) |
175 | { |
||
176 | return valueAtIndex( indexAt(QPointF(x,y)) ); |
||
177 | } |
||
36 | Werner | 178 | |
33 | Werner | 179 | template <class T> |
180 | const T& Grid<T>::constValueAt(const float x, const float y) const |
||
181 | { |
||
182 | return constValueAtIndex( indexAt(QPointF(x,y)) ); |
||
183 | } |
||
36 | Werner | 184 | |
33 | Werner | 185 | template <class T> |
22 | Werner | 186 | T& Grid<T>::valueAt(const QPointF& posf) |
187 | { |
||
188 | return valueAtIndex( indexAt(posf) ); |
||
189 | } |
||
36 | Werner | 190 | |
33 | Werner | 191 | template <class T> |
192 | const T& Grid<T>::constValueAt(const QPointF& posf) const |
||
193 | { |
||
194 | return constValueAtIndex( indexAt(posf) ); |
||
195 | } |
||
22 | Werner | 196 | |
197 | template <class T> |
||
15 | Werner | 198 | Grid<T>::Grid() |
199 | { |
||
37 | Werner | 200 | mData = 0; mCellsize=0.f; |
201 | mEnd = 0; |
||
15 | Werner | 202 | } |
203 | |||
204 | template <class T> |
||
18 | Werner | 205 | bool Grid<T>::setup(const float cellsize, const int sizex, const int sizey) |
15 | Werner | 206 | { |
37 | Werner | 207 | mSizeX=sizex; mSizeY=sizey; mCellsize=cellsize; |
50 | Werner | 208 | if (mRect.isNull()) // only set rect if not set before |
209 | mRect.setCoords(0., 0., cellsize*sizex, cellsize*sizey); |
||
15 | Werner | 210 | mCount = mSizeX*mSizeY; |
37 | Werner | 211 | if (mData) { |
212 | delete[] mData; mData=NULL; |
||
213 | } |
||
15 | Werner | 214 | if (mCount>0) |
37 | Werner | 215 | mData = new T[mCount]; |
216 | mEnd = &(mData[mCount]); |
||
15 | Werner | 217 | return true; |
218 | } |
||
219 | |||
220 | template <class T> |
||
22 | Werner | 221 | bool Grid<T>::setup(const QRectF& rect, const double cellsize) |
15 | Werner | 222 | { |
49 | Werner | 223 | mRect = rect; |
22 | Werner | 224 | int dx = int(rect.width()/cellsize); |
49 | Werner | 225 | if (mRect.left()+cellsize*dx<rect.right()) |
22 | Werner | 226 | dx++; |
227 | int dy = int(rect.height()/cellsize); |
||
49 | Werner | 228 | if (mRect.top()+cellsize*dy<rect.bottom()) |
22 | Werner | 229 | dy++; |
230 | return setup(cellsize, dx, dy); |
||
15 | Werner | 231 | } |
232 | |||
25 | Werner | 233 | template <class T> |
27 | Werner | 234 | QPoint Grid<T>::indexOf(T* element) const |
25 | Werner | 235 | { |
236 | QPoint result(-1,-1); |
||
237 | if (element==NULL || element<mData || element>=end()) |
||
238 | return result; |
||
239 | int idx = element - mData; |
||
77 | Werner | 240 | result.setX( idx / mSizeX); |
241 | result.setY( idx % mSizeX); |
||
25 | Werner | 242 | return result; |
243 | } |
||
22 | Werner | 244 | |
27 | Werner | 245 | template <class T> |
246 | T Grid<T>::max() const |
||
247 | { |
||
248 | T maxv = std::numeric_limits<T>::min(); |
||
249 | T* p; |
||
250 | T* pend = end(); |
||
251 | for (p=begin(); p!=pend;++p) |
||
252 | maxv = std::max(maxv, *p); |
||
253 | return maxv; |
||
254 | } |
||
255 | |||
33 | Werner | 256 | template <class T> |
257 | T Grid<T>::sum() const |
||
258 | { |
||
259 | T* pend = end(); |
||
260 | T total = 0; |
||
261 | for (T *p=begin(); p!=pend;++p) |
||
262 | total += *p; |
||
263 | return total; |
||
264 | } |
||
265 | |||
266 | template <class T> |
||
267 | T Grid<T>::avg() const |
||
268 | { |
||
269 | if (count()) |
||
270 | return sum() / T(count()); |
||
271 | else return 0; |
||
272 | } |
||
273 | |||
36 | Werner | 274 | ////////////////////////////////////////////////////////////7 |
275 | // global functions |
||
276 | ////////////////////////////////////////////////////////////7 |
||
277 | |||
278 | /// dumps a FloatGrid to a String. |
||
46 | Werner | 279 | /// rows will be y-lines, columns x-values. (see grid.cpp) |
36 | Werner | 280 | QString gridToString(const FloatGrid &grid); |
281 | |||
282 | /// creates and return a QImage from Grid-Data. |
||
283 | /// @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) |
||
284 | /// @param min_value, max_value min/max bounds for color calcuations. values outside bounds are limited to these values. defaults: min=0, max=1 |
||
285 | /// @param reverse if true, color ramps are inversed (to: min_value = white (black and white mode) or red (color mode). default = false. |
||
286 | /// @return a QImage with the Grids size of pixels. Pixel coordinates relate to the index values of the grid. |
||
287 | QImage gridToImage(const FloatGrid &grid, |
||
288 | bool black_white=false, |
||
289 | double min_value=0., double max_value=1., |
||
290 | bool reverse=false); |
||
291 | |||
46 | Werner | 292 | /// template version for non-float grids (see also version for FloatGrid) |
36 | Werner | 293 | template <class T> |
46 | Werner | 294 | QString gridToString(const Grid<T> &grid) |
36 | Werner | 295 | { |
296 | QString res; |
||
297 | QTextStream ts(&res); |
||
298 | |||
46 | Werner | 299 | for (int y=0;y<grid.sizeY();y++){ |
300 | for (int x=0;x<grid.sizeX();x++){ |
||
36 | Werner | 301 | ts << grid.constValueAtIndex(x,y) << ";"; |
302 | } |
||
303 | ts << "\r\n"; |
||
304 | } |
||
305 | |||
306 | return res; |
||
307 | } |
||
46 | Werner | 308 | |
15 | Werner | 309 | #endif // GRID_H |