| [89] | 1 | |
|---|
| 2 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" |
|---|
| 3 | "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
|---|
| 4 | |
|---|
| 5 | <!-- Generated by IDLdoc 2.0 --> |
|---|
| 6 | |
|---|
| 7 | <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> |
|---|
| 8 | <head> |
|---|
| [104] | 9 | <title>inquad.pro (SAXO Documentation)</title> |
|---|
| [89] | 10 | |
|---|
| 11 | |
|---|
| [191] | 12 | <link rel="stylesheet" type="text/css" media="all" href="./../main_files.css" /> |
|---|
| 13 | <link rel="stylesheet" type="text/css" media="print" href="./../main_files_print.css" /> |
|---|
| [89] | 14 | |
|---|
| 15 | |
|---|
| 16 | <script type="text/javascript"> |
|---|
| 17 | function setTitle() { |
|---|
| [104] | 18 | parent.document.title="inquad.pro (SAXO Documentation)"; |
|---|
| [89] | 19 | } |
|---|
| 20 | </script> |
|---|
| 21 | </head> |
|---|
| 22 | |
|---|
| 23 | <body onload="setTitle();"> |
|---|
| 24 | |
|---|
| 25 | <div id="navbar_title"> |
|---|
| [104] | 26 | <h1>SAXO Documentation</h1> |
|---|
| [89] | 27 | </div> |
|---|
| 28 | |
|---|
| 29 | |
|---|
| 30 | <div id="main_navbar"> |
|---|
| 31 | |
|---|
| 32 | <table cellspacing="0"> |
|---|
| 33 | <tr> |
|---|
| 34 | |
|---|
| [189] | 35 | <td><a href="./../overview.html" title="Overview of library">Overview</a></td> |
|---|
| [89] | 36 | |
|---|
| 37 | |
|---|
| 38 | |
|---|
| 39 | <td >Directory</td> |
|---|
| 40 | |
|---|
| 41 | |
|---|
| 42 | |
|---|
| [189] | 43 | <td><a href="./../idldoc-categories.html" title="Browse library by category">Categories</a></td> |
|---|
| [89] | 44 | |
|---|
| 45 | |
|---|
| 46 | |
|---|
| [189] | 47 | <td><a href="./../idldoc-index.html" title="Index of files, routines, and parameters">Index</a></td> |
|---|
| [89] | 48 | |
|---|
| 49 | |
|---|
| 50 | |
|---|
| [189] | 51 | <td><a href="./../search-page.html" title="Search library">Search</a></td> |
|---|
| [89] | 52 | |
|---|
| 53 | |
|---|
| 54 | <td id="selected">File</td> |
|---|
| 55 | |
|---|
| 56 | |
|---|
| [189] | 57 | <td><a href="../../../Interpolation//inquad.pro" title="Source code of a file">Source</a></td> |
|---|
| [89] | 58 | |
|---|
| 59 | |
|---|
| 60 | |
|---|
| [189] | 61 | <td><a href="./../idldoc-help.html" title="Help on IDLdoc">Help</a></td> |
|---|
| [89] | 62 | |
|---|
| 63 | |
|---|
| 64 | <td >Etc</td> |
|---|
| 65 | |
|---|
| 66 | <td id="flexible">Developer documentation</td> |
|---|
| 67 | </tr> |
|---|
| 68 | </table> |
|---|
| 69 | |
|---|
| 70 | </div> |
|---|
| 71 | |
|---|
| 72 | <div id="secondary_navbar"> |
|---|
| 73 | |
|---|
| [189] | 74 | <a href="imoms3.html"><<prev file</a> | <a href="inrecgrid.html">next file >></a> <a href="inquad.html" target="_TOP">view single page</a> | <a href="./../index.html" target="_TOP">view frames</a> summary: fields | routine details: <a href="#routine_details">routine</a> |
|---|
| [89] | 75 | |
|---|
| 76 | </div> |
|---|
| 77 | |
|---|
| 78 | |
|---|
| 79 | <div id="container"> |
|---|
| 80 | |
|---|
| [189] | 81 | <h1 class="directory"><a href="directory-overview.html">Interpolation/</a></h1> |
|---|
| [89] | 82 | <h2 class="pro_file">inquad.pro</h2> |
|---|
| 83 | |
|---|
| 84 | <div id="file_attr"> |
|---|
| 85 | <dl> |
|---|
| 86 | </dl> |
|---|
| 87 | </div> |
|---|
| 88 | |
|---|
| [138] | 89 | <div id="file_comments"> |
|---|
| 90 | to find if an (x,y) point is in a quadrilateral (x1,x2,x3,x4) |
|---|
| [101] | 91 | </div> |
|---|
| [89] | 92 | |
|---|
| 93 | |
|---|
| 94 | |
|---|
| 95 | |
|---|
| 96 | |
|---|
| 97 | |
|---|
| 98 | |
|---|
| 99 | |
|---|
| 100 | |
|---|
| 101 | <div id="routine_details"> |
|---|
| 102 | |
|---|
| 103 | |
|---|
| 104 | <div class="routine_details" id="_inquad"> |
|---|
| 105 | |
|---|
| [234] | 106 | <h2><a class="top" href="#container">top</a>inquad <span class="categories"> |
|---|
| [157] | 107 | Grid |
|---|
| [101] | 108 | </span></h2> |
|---|
| [89] | 109 | |
|---|
| 110 | <p class="header"> |
|---|
| [321] | 111 | <span class="result">result = </span>inquad(<span class="result"><a href="#_inquad_param_x">x</a>, <a href="#_inquad_param_y">y</a>, <a href="#_inquad_param_x1">x1</a>, <a href="#_inquad_param_y1">y1</a>, <a href="#_inquad_param_x2">x2</a>, <a href="#_inquad_param_y2">y2</a>, <a href="#_inquad_param_x3">x3</a>, <a href="#_inquad_param_y3">y3</a>, <a href="#_inquad_param_x4">x4</a>, <a href="#_inquad_param_y4">y4</a></span>, <a href="#_inquad_keyword_ONSPHERE">ONSPHERE</a>=<span class="result">ONSPHERE</span>, <a href="#_inquad_keyword_DOUBLE">DOUBLE</a>=<span class="result">DOUBLE</span>, <a href="#_inquad_keyword_DELTA">DELTA</a>=<span class="result">DELTA</span>, <a href="#_inquad_keyword_NOPRINT">NOPRINT</a>=<span class="result">NOPRINT</span>, <a href="#_inquad_keyword_NEWCOORD">NEWCOORD</a>=<span class="result">NEWCOORD</span>)</p> |
|---|
| [89] | 112 | |
|---|
| [234] | 113 | <div class="comments"> |
|---|
| 114 | </div> |
|---|
| [89] | 115 | |
|---|
| [138] | 116 | <h3>Return value</h3><div class="preformat"> |
|---|
| [242] | 117 | a n elements vector where n is the number of elements of |
|---|
| [138] | 118 | x. res[i]=j means that the point number i is located in the |
|---|
| 119 | quadrilateral number j with (0 <= j <= n_elements(x0)-1) |
|---|
| [101] | 120 | </div> |
|---|
| [89] | 121 | |
|---|
| 122 | |
|---|
| 123 | <h3>Parameters</h3> |
|---|
| 124 | |
|---|
| 125 | |
|---|
| 126 | <h4 id="_inquad_param_x">x |
|---|
| [101] | 127 | <span class="attr">in</span> |
|---|
| [89] | 128 | |
|---|
| 129 | |
|---|
| [101] | 130 | <span class="attr">required</span> |
|---|
| [89] | 131 | |
|---|
| 132 | |
|---|
| 133 | |
|---|
| 134 | |
|---|
| 135 | </h4> |
|---|
| 136 | |
|---|
| [118] | 137 | <div class="comments"></div> |
|---|
| [89] | 138 | |
|---|
| 139 | <h4 id="_inquad_param_y">y |
|---|
| [118] | 140 | <span class="attr">in</span> |
|---|
| [89] | 141 | |
|---|
| 142 | |
|---|
| [118] | 143 | <span class="attr">required</span> |
|---|
| [89] | 144 | |
|---|
| 145 | |
|---|
| 146 | |
|---|
| 147 | |
|---|
| 148 | </h4> |
|---|
| 149 | |
|---|
| [118] | 150 | <div class="comments"> |
|---|
| [138] | 151 | the coordinates of the point we want to know where it is. |
|---|
| 152 | Must be a scalar if /ONSPHERE activated else can be scalar or array. |
|---|
| [118] | 153 | </div> |
|---|
| [89] | 154 | |
|---|
| 155 | <h4 id="_inquad_param_x1">x1 |
|---|
| [101] | 156 | <span class="attr">in</span> |
|---|
| [89] | 157 | |
|---|
| 158 | |
|---|
| [101] | 159 | <span class="attr">required</span> |
|---|
| [89] | 160 | |
|---|
| 161 | |
|---|
| 162 | |
|---|
| 163 | |
|---|
| 164 | </h4> |
|---|
| 165 | |
|---|
| [118] | 166 | <div class="comments"></div> |
|---|
| [89] | 167 | |
|---|
| 168 | <h4 id="_inquad_param_y1">y1 |
|---|
| [118] | 169 | <span class="attr">in</span> |
|---|
| [89] | 170 | |
|---|
| 171 | |
|---|
| [118] | 172 | <span class="attr">required</span> |
|---|
| [89] | 173 | |
|---|
| 174 | |
|---|
| 175 | |
|---|
| 176 | |
|---|
| 177 | </h4> |
|---|
| 178 | |
|---|
| 179 | <div class="comments"></div> |
|---|
| 180 | |
|---|
| 181 | <h4 id="_inquad_param_x2">x2 |
|---|
| [118] | 182 | <span class="attr">in</span> |
|---|
| [89] | 183 | |
|---|
| 184 | |
|---|
| [118] | 185 | <span class="attr">required</span> |
|---|
| [89] | 186 | |
|---|
| 187 | |
|---|
| 188 | |
|---|
| 189 | |
|---|
| 190 | </h4> |
|---|
| 191 | |
|---|
| 192 | <div class="comments"></div> |
|---|
| 193 | |
|---|
| 194 | <h4 id="_inquad_param_y2">y2 |
|---|
| [118] | 195 | <span class="attr">in</span> |
|---|
| [89] | 196 | |
|---|
| 197 | |
|---|
| [118] | 198 | <span class="attr">required</span> |
|---|
| [89] | 199 | |
|---|
| 200 | |
|---|
| 201 | |
|---|
| 202 | |
|---|
| 203 | </h4> |
|---|
| 204 | |
|---|
| 205 | <div class="comments"></div> |
|---|
| 206 | |
|---|
| 207 | <h4 id="_inquad_param_x3">x3 |
|---|
| [118] | 208 | <span class="attr">in</span> |
|---|
| [89] | 209 | |
|---|
| 210 | |
|---|
| [118] | 211 | <span class="attr">required</span> |
|---|
| [89] | 212 | |
|---|
| 213 | |
|---|
| 214 | |
|---|
| 215 | |
|---|
| 216 | </h4> |
|---|
| 217 | |
|---|
| 218 | <div class="comments"></div> |
|---|
| 219 | |
|---|
| 220 | <h4 id="_inquad_param_y3">y3 |
|---|
| [118] | 221 | <span class="attr">in</span> |
|---|
| [89] | 222 | |
|---|
| 223 | |
|---|
| [118] | 224 | <span class="attr">required</span> |
|---|
| [89] | 225 | |
|---|
| 226 | |
|---|
| 227 | |
|---|
| 228 | |
|---|
| 229 | </h4> |
|---|
| 230 | |
|---|
| 231 | <div class="comments"></div> |
|---|
| 232 | |
|---|
| 233 | <h4 id="_inquad_param_x4">x4 |
|---|
| [118] | 234 | <span class="attr">in</span> |
|---|
| [89] | 235 | |
|---|
| 236 | |
|---|
| [118] | 237 | <span class="attr">required</span> |
|---|
| [89] | 238 | |
|---|
| 239 | |
|---|
| 240 | |
|---|
| 241 | |
|---|
| 242 | </h4> |
|---|
| 243 | |
|---|
| 244 | <div class="comments"></div> |
|---|
| 245 | |
|---|
| 246 | <h4 id="_inquad_param_y4">y4 |
|---|
| [118] | 247 | <span class="attr">in</span> |
|---|
| [89] | 248 | |
|---|
| 249 | |
|---|
| [118] | 250 | <span class="attr">required</span> |
|---|
| [89] | 251 | |
|---|
| 252 | |
|---|
| 253 | |
|---|
| 254 | |
|---|
| 255 | </h4> |
|---|
| 256 | |
|---|
| [118] | 257 | <div class="comments"> |
|---|
| [138] | 258 | the coordinates of the quadrilateral given in the CLOCKWISE order. |
|---|
| 259 | Scalar or array. |
|---|
| [118] | 260 | </div> |
|---|
| [89] | 261 | |
|---|
| 262 | |
|---|
| 263 | |
|---|
| 264 | |
|---|
| 265 | |
|---|
| 266 | |
|---|
| 267 | <h3>Keywords</h3> |
|---|
| 268 | |
|---|
| 269 | <h4 id="_inquad_keyword_ONSPHERE">ONSPHERE |
|---|
| 270 | |
|---|
| 271 | |
|---|
| 272 | |
|---|
| 273 | |
|---|
| 274 | |
|---|
| 275 | |
|---|
| 276 | |
|---|
| 277 | |
|---|
| 278 | </h4> |
|---|
| 279 | |
|---|
| [138] | 280 | <div class="comments"> |
|---|
| [163] | 281 | to specify that the quadrilateral are on a sphere and |
|---|
| 282 | that their coordinates are longitude-latitude coordinates. In this |
|---|
| [321] | 283 | case, east-west periodicity, poles singularity and other pbs |
|---|
| [138] | 284 | related to longitude-latitude coordinates are managed |
|---|
| 285 | automatically. |
|---|
| [101] | 286 | </div> |
|---|
| [89] | 287 | |
|---|
| 288 | <h4 id="_inquad_keyword_DOUBLE">DOUBLE |
|---|
| 289 | |
|---|
| 290 | |
|---|
| 291 | |
|---|
| 292 | |
|---|
| 293 | |
|---|
| 294 | |
|---|
| 295 | |
|---|
| 296 | |
|---|
| 297 | </h4> |
|---|
| 298 | |
|---|
| [138] | 299 | <div class="comments"> |
|---|
| 300 | use double precision to perform the computation |
|---|
| [101] | 301 | </div> |
|---|
| [89] | 302 | |
|---|
| [321] | 303 | <h4 id="_inquad_keyword_DELTA">DELTA |
|---|
| [89] | 304 | |
|---|
| 305 | |
|---|
| 306 | |
|---|
| 307 | |
|---|
| 308 | |
|---|
| 309 | |
|---|
| [121] | 310 | <span class="attr">default:</span> <span class="value">4</span> |
|---|
| [89] | 311 | |
|---|
| 312 | </h4> |
|---|
| 313 | |
|---|
| [121] | 314 | <div class="comments"> |
|---|
| [321] | 315 | to speed up the program, we reduce the aera where we look for potential |
|---|
| 316 | quadrilaterals containing (x,y). Delta defines the limit of the box |
|---|
| 317 | centred on (x,y) with a zonal and meridional extent of delta degrees. |
|---|
| [138] | 318 | </div> |
|---|
| [89] | 319 | |
|---|
| 320 | <h4 id="_inquad_keyword_NOPRINT">NOPRINT |
|---|
| 321 | |
|---|
| 322 | |
|---|
| 323 | |
|---|
| 324 | |
|---|
| 325 | |
|---|
| 326 | |
|---|
| 327 | |
|---|
| 328 | |
|---|
| 329 | </h4> |
|---|
| 330 | |
|---|
| [138] | 331 | <div class="comments"> |
|---|
| 332 | to suppress the print messages. |
|---|
| [101] | 333 | </div> |
|---|
| [89] | 334 | |
|---|
| 335 | <h4 id="_inquad_keyword_NEWCOORD">NEWCOORD |
|---|
| 336 | |
|---|
| 337 | |
|---|
| 338 | |
|---|
| 339 | |
|---|
| 340 | |
|---|
| 341 | |
|---|
| 342 | |
|---|
| 343 | |
|---|
| 344 | </h4> |
|---|
| 345 | |
|---|
| [118] | 346 | <div class="comments"> |
|---|
| 347 | </div> |
|---|
| [89] | 348 | |
|---|
| 349 | |
|---|
| 350 | |
|---|
| [138] | 351 | <h3>Examples</h3><div class="preformat"> |
|---|
| [101] | 352 | |
|---|
| [402] | 353 | IDL> x = 1.*[1, 2, 6, 7, 3] |
|---|
| 354 | IDL> y = 1.*[1, 3, 3, 4, 7] |
|---|
| 355 | IDL> x1 = 1.*[0,4,2] |
|---|
| 356 | IDL> y1 = 1.*[1,4,8] |
|---|
| 357 | IDL> x2 = 1.*[1,6,4] |
|---|
| 358 | IDL> y2 = 1.*[5,6,8] |
|---|
| 359 | IDL> x3 = 1.*[3,8,4] |
|---|
| 360 | IDL> y3 = 1.*[4,4,6] |
|---|
| 361 | IDL> x4 = 1.*[2,6,2] |
|---|
| 362 | IDL> y4 = 1.*[0,2,6] |
|---|
| 363 | IDL> splot, [0,10], [0,10], xstyle = 1, ystyle = 1,/nodata |
|---|
| 364 | IDL> for i=0,2 do oplot, [x4[i],x1[i],x2[i],x3[i],x4[i]],[y4[i],y1[i],y2[i],y3[i],y4[i]] |
|---|
| 365 | IDL> oplot, x, y, color = 20, psym = 1, thick = 2 |
|---|
| 366 | IDL> print, inquad(x, y, x1, y1, x2, y2, x3, y3, x4, y4) |
|---|
| [101] | 367 | |
|---|
| [234] | 368 | On a sphere see |
|---|
| [290] | 369 | <a href="..//Interpolation/clickincell.html">clickincell</a> ... |
|---|
| [101] | 370 | </div> |
|---|
| 371 | <h3>Version history</h3> |
|---|
| [89] | 372 | |
|---|
| [234] | 373 | <h4>Version</h4><div class="preformat"> |
|---|
| [402] | 374 | $Id: inquad.pro 371 2008-08-07 09:32:02Z pinsard $ |
|---|
| [118] | 375 | </div> |
|---|
| [138] | 376 | <h4>History</h4><div class="preformat"> |
|---|
| [101] | 377 | Sebastien Masson (smasson@lodyc.jussieu.fr) |
|---|
| 378 | August 2003 |
|---|
| [138] | 379 | Based on Convert_clic_ij.pro written by Gurvan Madec |
|---|
| [101] | 380 | </div> |
|---|
| [89] | 381 | |
|---|
| 382 | |
|---|
| [101] | 383 | <h3>Known issues</h3> |
|---|
| [89] | 384 | |
|---|
| 385 | |
|---|
| 386 | |
|---|
| [138] | 387 | <h4>Restrictions</h4><div class="preformat"> |
|---|
| 388 | I think degenerated quadrilateral (e.g. flat of twisted) is not work. |
|---|
| 389 | This has to be tested. |
|---|
| [101] | 390 | </div> |
|---|
| [89] | 391 | |
|---|
| 392 | |
|---|
| 393 | |
|---|
| 394 | |
|---|
| 395 | |
|---|
| 396 | |
|---|
| 397 | |
|---|
| 398 | |
|---|
| 399 | |
|---|
| [163] | 400 | <h3>Statistics</h3> |
|---|
| 401 | <table class="statistics"> |
|---|
| [321] | 402 | <tr><td>McCabe cyclic</td><td> 22</td></tr> |
|---|
| [163] | 403 | <tr><td>McCabe essential</td><td> 1</td></tr> |
|---|
| 404 | <tr><td>McCabe modular design</td><td> 1</td></tr> |
|---|
| 405 | </table> |
|---|
| [89] | 406 | |
|---|
| 407 | |
|---|
| 408 | </div> |
|---|
| 409 | |
|---|
| 410 | </div> |
|---|
| 411 | |
|---|
| 412 | |
|---|
| 413 | |
|---|
| 414 | <div id="tagline">Produced by IDLdoc 2.0.</div> |
|---|
| 415 | |
|---|
| 416 | </div> |
|---|
| 417 | |
|---|
| 418 | </body> |
|---|
| [249] | 419 | </html> |
|---|
