1 | // ----------------------------------------------------------------------- |
---|
2 | // Scan.cc: Member functions for the Scan class. |
---|
3 | // ----------------------------------------------------------------------- |
---|
4 | // Copyright (C) 2006, Matthew Whiting, ATNF |
---|
5 | // |
---|
6 | // This program is free software; you can redistribute it and/or modify it |
---|
7 | // under the terms of the GNU General Public License as published by the |
---|
8 | // Free Software Foundation; either version 2 of the License, or (at your |
---|
9 | // option) any later version. |
---|
10 | // |
---|
11 | // Duchamp is distributed in the hope that it will be useful, but WITHOUT |
---|
12 | // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
---|
13 | // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
---|
14 | // for more details. |
---|
15 | // |
---|
16 | // You should have received a copy of the GNU General Public License |
---|
17 | // along with Duchamp; if not, write to the Free Software Foundation, |
---|
18 | // Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA |
---|
19 | // |
---|
20 | // Correspondence concerning Duchamp may be directed to: |
---|
21 | // Internet email: Matthew.Whiting [at] atnf.csiro.au |
---|
22 | // Postal address: Dr. Matthew Whiting |
---|
23 | // Australia Telescope National Facility, CSIRO |
---|
24 | // PO Box 76 |
---|
25 | // Epping NSW 1710 |
---|
26 | // AUSTRALIA |
---|
27 | // ----------------------------------------------------------------------- |
---|
28 | #include <duchamp/PixelMap/Scan.hh> |
---|
29 | #include <iostream> |
---|
30 | #include <math.h> |
---|
31 | |
---|
32 | namespace PixelInfo |
---|
33 | { |
---|
34 | |
---|
35 | Scan::Scan() |
---|
36 | { |
---|
37 | this->itsY=-1; |
---|
38 | this->itsX=-1; |
---|
39 | this->itsXLen=0; |
---|
40 | } |
---|
41 | |
---|
42 | Scan::Scan(const Scan& s) |
---|
43 | { |
---|
44 | operator=(s); |
---|
45 | } |
---|
46 | //------------------------------------------------------ |
---|
47 | |
---|
48 | Scan& Scan::operator= (const Scan& s) |
---|
49 | { |
---|
50 | if(this == &s) return *this; |
---|
51 | this->itsY=s.itsY; |
---|
52 | this->itsX=s.itsX; |
---|
53 | this->itsXLen=s.itsXLen; |
---|
54 | return *this; |
---|
55 | } |
---|
56 | //------------------------------------------------------ |
---|
57 | |
---|
58 | Scan nullScan() |
---|
59 | { |
---|
60 | /** |
---|
61 | * A simple way of returning a scan with zero length. |
---|
62 | */ |
---|
63 | Scan null(-1,-1,0); |
---|
64 | return null; |
---|
65 | } |
---|
66 | |
---|
67 | bool Scan::isNull() |
---|
68 | { |
---|
69 | return (itsY==-1 && itsX==-1 && itsXLen==0); |
---|
70 | } |
---|
71 | |
---|
72 | //------------------------------------------------------ |
---|
73 | |
---|
74 | Scan unite(Scan &scan1, Scan &scan2) |
---|
75 | { |
---|
76 | /** |
---|
77 | * Return a scan that includes all pixels from both scans, but |
---|
78 | * only if they overlap. If they do not, return the null scan. |
---|
79 | * |
---|
80 | */ |
---|
81 | |
---|
82 | Scan joined; |
---|
83 | if(!touching(scan1,scan2)){ |
---|
84 | // std::cerr << "Joining scans failed! (" |
---|
85 | // << scan1 <<"),("<<scan2<<") don't overlap\n"; |
---|
86 | joined = nullScan(); |
---|
87 | } |
---|
88 | else{ |
---|
89 | long y = scan1.getY(); |
---|
90 | long x = std::min(scan1.getX(),scan2.getX()); |
---|
91 | long xmax = std::max(scan1.getXmax(),scan2.getXmax()); |
---|
92 | joined.define(y,x,xmax-x+1); |
---|
93 | } |
---|
94 | return joined; |
---|
95 | } |
---|
96 | |
---|
97 | //------------------------------------------------------ |
---|
98 | |
---|
99 | Scan intersect(Scan &scan1, Scan &scan2) |
---|
100 | { |
---|
101 | /** |
---|
102 | * Return a scan that includes all pixels that lie in both scans. |
---|
103 | * |
---|
104 | * If they do not overlap, return the null scan. |
---|
105 | * |
---|
106 | */ |
---|
107 | |
---|
108 | Scan intersection; |
---|
109 | if(!overlap(scan1,scan2)){ |
---|
110 | // std::cerr << "Intersecting scans failed! (" |
---|
111 | // << scan1 <<"),("<<scan2<<") don't overlap.\n"; |
---|
112 | intersection = nullScan(); |
---|
113 | } |
---|
114 | else{ |
---|
115 | long y = scan1.getY(); |
---|
116 | long x = std::max(scan1.getX(),scan2.getX()); |
---|
117 | long xmax = std::min(scan1.getXmax(),scan2.getXmax()); |
---|
118 | intersection.define(y,x,xmax-x+1); |
---|
119 | } |
---|
120 | return intersection; |
---|
121 | } |
---|
122 | //------------------------------------------------------ |
---|
123 | |
---|
124 | bool touching(Scan &scan1, Scan &scan2) |
---|
125 | { |
---|
126 | /** |
---|
127 | * Test whether two scans either overlap, or lie adjacent |
---|
128 | * (ie. there are no pixels lying between the two scans). |
---|
129 | * \return A bool value. |
---|
130 | */ |
---|
131 | // if(scan1.getY()!=scan2.getY()) return false; |
---|
132 | // else if(scan1.getX() <= scan2.getX()) |
---|
133 | // return (scan2.getX() <= scan1.getXmax()+1); |
---|
134 | // else |
---|
135 | // return (scan1.getX() <= scan2.getXmax()+1); |
---|
136 | return overlap(scan1,scan2) || adjacent(scan1,scan2); |
---|
137 | |
---|
138 | } |
---|
139 | //------------------------------------------------------ |
---|
140 | |
---|
141 | bool overlap(Scan &scan1, Scan &scan2) |
---|
142 | { |
---|
143 | /** |
---|
144 | * Test whether two scans overlap, ie. they have pixels in |
---|
145 | * common. |
---|
146 | * \return A bool value. |
---|
147 | */ |
---|
148 | if(scan1.getY()!=scan2.getY()) return false; |
---|
149 | else if(scan1.getX() <= scan2.getX()) |
---|
150 | return (scan2.getX() <= scan1.getXmax()); |
---|
151 | else |
---|
152 | return (scan1.getX() <= scan2.getXmax()); |
---|
153 | |
---|
154 | } |
---|
155 | //------------------------------------------------------ |
---|
156 | |
---|
157 | bool adjacent(Scan &scan1, Scan &scan2) |
---|
158 | { |
---|
159 | /** |
---|
160 | * Test whether two scans lie adjacent (ie. there are no pixels |
---|
161 | * lying between the two scans). If they overlap, return false. |
---|
162 | * \return A bool value. |
---|
163 | */ |
---|
164 | if(scan1.getY()!=scan2.getY()) return false; |
---|
165 | else if(scan1.getX() <= scan2.getX()) |
---|
166 | return (scan2.getX() == scan1.getXmax()+1); |
---|
167 | else |
---|
168 | return (scan1.getX() == scan2.getXmax()+1); |
---|
169 | |
---|
170 | } |
---|
171 | //------------------------------------------------------ |
---|
172 | |
---|
173 | std::ostream& operator<< ( std::ostream& theStream, Scan& scan) |
---|
174 | { |
---|
175 | /** |
---|
176 | * Output the three key parameters of the scan. |
---|
177 | */ |
---|
178 | // theStream << scan.itsY; |
---|
179 | // theStream << " " << scan.itsX; |
---|
180 | // theStream << " " << scan.itsXLen; |
---|
181 | if(scan.isNull()) theStream << "NULL"; |
---|
182 | else{ |
---|
183 | theStream << scan.itsX; |
---|
184 | theStream << "-" << scan.getXmax(); |
---|
185 | theStream << ", " << scan.itsY; |
---|
186 | } |
---|
187 | return theStream; |
---|
188 | } |
---|
189 | //------------------------------------------------------ |
---|
190 | |
---|
191 | bool operator< (Scan lhs, Scan rhs) |
---|
192 | { |
---|
193 | /** |
---|
194 | * Test for less-than first on the y-values, and if they are |
---|
195 | * equal, test on the starting x-value, and then finally on the |
---|
196 | * length. |
---|
197 | * |
---|
198 | * This is necessary for sorting functions on lists of Scans (used |
---|
199 | * by the Object2D class). |
---|
200 | */ |
---|
201 | if(lhs.itsY != rhs.itsY) return (lhs.itsY < rhs.itsY); |
---|
202 | else if(lhs.itsX != rhs.itsX) return (lhs.itsX < rhs.itsX); |
---|
203 | else return (lhs.itsXLen < rhs.itsXLen); |
---|
204 | } |
---|
205 | //------------------------------------------------------ |
---|
206 | |
---|
207 | bool operator== (Scan lhs, Scan rhs) |
---|
208 | { |
---|
209 | /** |
---|
210 | * For two scans to be equal, all three parameters must be equal. |
---|
211 | */ |
---|
212 | return (lhs.itsY == rhs.itsY) && |
---|
213 | (lhs.itsX == rhs.itsX) && |
---|
214 | (lhs.itsXLen == rhs.itsXLen); |
---|
215 | } |
---|
216 | //------------------------------------------------------ |
---|
217 | |
---|
218 | bool Scan::isInScan(long x, long y) |
---|
219 | { |
---|
220 | return (y == this->itsY) && |
---|
221 | ( (x>= this->itsX) && (x < (this->itsXLen+this->itsX)) ); |
---|
222 | } |
---|
223 | //------------------------------------------------------ |
---|
224 | |
---|
225 | float minSep(Scan &s1, Scan &s2) |
---|
226 | { |
---|
227 | |
---|
228 | if(s1.getX() > s2.getXmax()) return hypot(s1.getX()-s2.getXmax(),s1.getY()-s2.getY()); |
---|
229 | else if(s2.getX() > s1.getXmax()) return hypot(s2.getX()-s1.getXmax(),s1.getY()-s2.getY()); |
---|
230 | else return fabsf(s1.getY()-s2.getY()); |
---|
231 | |
---|
232 | } |
---|
233 | //------------------------------------------------------ |
---|
234 | |
---|
235 | |
---|
236 | void mergeList(std::vector<Scan> scanlist) |
---|
237 | { |
---|
238 | std::vector<Scan>::iterator iter; |
---|
239 | int counter=0,compCounter; |
---|
240 | while(counter<(scanlist.size()-1)){ |
---|
241 | |
---|
242 | |
---|
243 | compCounter = counter+1; |
---|
244 | |
---|
245 | do{ |
---|
246 | |
---|
247 | if(touching(scanlist[counter],scanlist[compCounter])){ |
---|
248 | Scan temp = unite(scanlist[counter],scanlist[compCounter]); |
---|
249 | iter = scanlist.begin()+compCounter; |
---|
250 | scanlist.erase(iter); |
---|
251 | iter = scanlist.begin()+counter; |
---|
252 | scanlist.erase(iter); |
---|
253 | scanlist.push_back(temp); |
---|
254 | } |
---|
255 | else compCounter ++; |
---|
256 | }while(compCounter < scanlist.size()); |
---|
257 | |
---|
258 | counter++; |
---|
259 | } |
---|
260 | |
---|
261 | } |
---|
262 | |
---|
263 | |
---|
264 | } |
---|