Mercurial > dive4elements > gnv-client
comparison gnv-artifacts/src/main/java/de/intevation/gnv/raster/Palette.java @ 435:67091b17462d
Added code to split palette interval into equal sized parts.
gnv-artifacts/trunk@483 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Fri, 25 Dec 2009 12:00:14 +0000 |
| parents | 3a0c0ad113d9 |
| children | 7399bb8f83ea |
comparison
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| 434:0eed5749fd63 | 435:67091b17462d |
|---|---|
| 30 private String description; | 30 private String description; |
| 31 | 31 |
| 32 private Color color; | 32 private Color color; |
| 33 | 33 |
| 34 public Entry() { | 34 public Entry() { |
| 35 } | |
| 36 | |
| 37 public Entry(Entry other) { | |
| 38 index = other.index; | |
| 39 from = other.from; | |
| 40 to = other.to; | |
| 41 description = other.description; | |
| 42 color = other.color; | |
| 35 } | 43 } |
| 36 | 44 |
| 37 public Entry( | 45 public Entry( |
| 38 int index, | 46 int index, |
| 39 double from, | 47 double from, |
| 90 } | 98 } |
| 91 | 99 |
| 92 public String getDescription() { | 100 public String getDescription() { |
| 93 return description; | 101 return description; |
| 94 } | 102 } |
| 103 | |
| 104 public boolean isInfinity() { | |
| 105 return from == -Double.MAX_VALUE | |
| 106 || to == Double.MAX_VALUE; | |
| 107 } | |
| 95 } // class Entry | 108 } // class Entry |
| 96 | 109 |
| 97 protected Entry [] entries; | 110 protected Entry [] entries; |
| 98 protected Entry lookup; | 111 protected Entry lookup; |
| 99 protected Color [] rgbs; | 112 protected Color [] rgbs; |
| 138 } | 151 } |
| 139 | 152 |
| 140 buildLookup(); | 153 buildLookup(); |
| 141 } | 154 } |
| 142 | 155 |
| 156 public Palette(Palette original, int N) { | |
| 157 if (N < 2) { | |
| 158 throw new IllegalArgumentException("N < 2"); | |
| 159 } | |
| 160 | |
| 161 Entry [] origEntries = original.entries; | |
| 162 | |
| 163 int newSize = 0; | |
| 164 for (int i = 0; i < origEntries.length; ++i) { | |
| 165 // cannot split infinity intervals | |
| 166 newSize += origEntries[i].isInfinity() ? 1 : N; | |
| 167 } | |
| 168 | |
| 169 entries = new Entry[newSize]; | |
| 170 rgbs = new Color[newSize]; | |
| 171 | |
| 172 for (int i = 0, j = 0; i < origEntries.length; ++i) { | |
| 173 Entry origEntry = origEntries[i]; | |
| 174 if (origEntry.isInfinity()) { | |
| 175 // infinity intervals are just copied | |
| 176 Entry nEntry = new Entry(origEntry); | |
| 177 entries[j] = nEntry; | |
| 178 rgbs[j] = nEntry.color; | |
| 179 nEntry.index = j++; | |
| 180 } | |
| 181 else { | |
| 182 // split interval into N parts | |
| 183 double from = origEntry.from; | |
| 184 double to = origEntry.to; | |
| 185 double delta = (to - from)/N; | |
| 186 while (from < to) { | |
| 187 Entry nEntry = new Entry(origEntry); | |
| 188 nEntry.from = from; | |
| 189 nEntry.to = from + delta; | |
| 190 from += delta; | |
| 191 entries[j] = nEntry; | |
| 192 rgbs[j] = nEntry.color; | |
| 193 nEntry.index = j++; | |
| 194 } | |
| 195 } // limited interval | |
| 196 } // for all original entries | |
| 197 | |
| 198 buildLookup(); | |
| 199 } | |
| 200 | |
| 143 private static final double doubleValue(String s) { | 201 private static final double doubleValue(String s) { |
| 144 if (s == null || (s = s.trim()).length() == 0) { | 202 if (s == null || (s = s.trim()).length() == 0) { |
| 145 return 0d; | 203 return 0d; |
| 146 } | 204 } |
| 147 if ((s = s.toLowerCase()).startsWith("-inf")) { | 205 if ((s = s.toLowerCase()).startsWith("-inf")) { |
| 166 protected void buildLookup() { | 224 protected void buildLookup() { |
| 167 Arrays.sort(entries); | 225 Arrays.sort(entries); |
| 168 lookup = buildLookup(entries, 0, entries.length-1); | 226 lookup = buildLookup(entries, 0, entries.length-1); |
| 169 } | 227 } |
| 170 | 228 |
| 229 public Palette subdivide(int N) { | |
| 230 return new Palette(this, N); | |
| 231 } | |
| 232 | |
| 171 public String getDescription() { | 233 public String getDescription() { |
| 172 return description; | 234 return description; |
| 173 } | 235 } |
| 174 | 236 |
| 175 public int getSize() { | 237 public int getSize() { |