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5 | <title>triangule_c.pro (SAXO Documentation Assistant)</title> |
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45 | <table border="0" cellpadding="0" cellspacing="0" width="98%" bgcolor="#F0F0FF" valign="bottom"> |
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46 | <tr> |
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47 | <td width="10%"> |
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48 | <a href="triangule.html"><img src="./../../prev.gif" border="0" alt="Previous"></a></td> |
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49 | <td width="80%" align="center" valign="center"> |
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50 | <font size=-1><i>SAXO Documentation Assistant</i>: <a href="./../../home.html">Overview</a></font></td> |
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51 | <td width="10%" align="right"> |
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52 | <a href="triangule_e.html"><img src="./../../next.gif" border="0" alt="Next"></a></td> |
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53 | </tr> |
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54 | </table> |
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55 | |
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56 | |
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57 | <h1><font size="-2">ToBeReviewed/TRIANGULATION/</font></h1> |
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58 | <h2>triangule_c.pro</h2> |
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59 | |
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60 | <dl> |
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61 | </dl> |
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62 | |
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63 | |
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64 | Construct the triangulation array. |
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65 | |
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66 | The idea is: construct a list of triangle which link points between them. |
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67 | This is automatically done by the function TRIANGULATE |
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68 | Here: |
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69 | we consider the fact that points are disposed on a grid (regular or not, |
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70 | but not unstructured, that is to say that points are written following a |
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71 | rectangular matrix). A easy way to do triangles between all points is then: |
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72 | |
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73 | for each point (i,j) of the matrix -except those of the last line and of |
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74 | the last column- we call rectangle (i,j) the rectangle made of the four |
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75 | points (i,j), (i+1,j), (i,j+1), (i+1,j+1). To trace all triangle, we just |
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76 | have to trace the 2 triangles contained in rectangles (i,j) |
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77 | |
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78 | We notice that each rectangle (i,j) have 2 diagonals (it is true... Make a |
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79 | drawing to make sure!!), so there are two possible choice for each rectangle |
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80 | we want to cut in 2 triangles... |
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81 | |
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82 | It is thanks to this choice that we will be able to trace coast with right |
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83 | angles. At each angle of coast remarkable by the existence of an unique land |
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84 | point or of an unique ocean point on one of the four summit of a rectangle (i,j), |
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85 | we have to cut the rectangle following the diagonal passing by this point. |
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86 | |
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87 | |
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88 | |
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89 | |
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90 | |
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91 | <a name="#_triangule_c"></a> |
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92 | |
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93 | <h2>triangule_c <font size="-1" color="#006633"> |
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94 | Graphics |
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95 | </font></h2> |
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96 | |
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97 | <p><font face="Courier"><i>result = </i>triangule_c(<i>[<a href="#_triangule_c_keyword_maskentree">maskentree</a>]</i>, <a href="#_triangule_c_keyword_COINMONTE">COINMONTE</a>=<i>array</i>, <a href="#_triangule_c_keyword_COINDESCEND">COINDESCEND</a>=<i>array</i>, <a href="#_triangule_c_keyword_BASIC">BASIC</a>=<i>BASIC</i>, <a href="#_triangule_c_keyword_KEEP_CONT">KEEP_CONT</a>=<i>KEEP_CONT</i>)</font></p> |
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98 | |
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99 | |
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100 | |
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101 | |
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102 | <h3>Return value</h3> |
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103 | res: tableau 2d (3,nbre de triangles). |
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104 | Each line of res represent indexes of points constituting summits of a triangle. |
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105 | See how we trace triangles in definetri.pro |
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106 | |
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107 | |
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108 | |
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109 | <h3>Parameters</h3> |
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110 | |
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111 | |
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112 | <a name="#_triangule_c_keyword_maskentree"></a> |
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113 | <h4>maskentree |
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114 | <font size="-1" color="#006633">in</font> |
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115 | |
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116 | <font size="-1" color="#006633">optional</font> |
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117 | |
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118 | |
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119 | <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>2d array</i></font> |
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120 | |
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121 | |
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122 | </h4> |
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123 | |
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124 | |
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125 | It is a 2d array which will serve to mask the field we will trace after with CONTOUR, |
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126 | ...TRIANGULATION=triangule(mask) |
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127 | If this argument is not specified, the function use tmask |
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128 | |
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129 | |
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130 | |
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131 | |
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132 | |
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133 | <h3>Keywords</h3> |
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134 | |
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135 | |
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136 | <a name="#_triangule_c_keyword_COINMONTE"></a> |
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137 | <h4>COINMONTE |
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138 | |
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139 | |
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140 | |
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141 | |
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142 | |
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143 | <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>array</i></font> |
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144 | |
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145 | |
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146 | </h4> |
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147 | |
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148 | |
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149 | To obtain the array of "ascending land corner" to be treated with |
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150 | completecointerre.pro in the variable array instead of make it pass by the global |
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151 | variable twin_corners_up. |
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152 | |
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153 | |
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154 | <a name="#_triangule_c_keyword_COINDESCEND"></a> |
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155 | <h4>COINDESCEND |
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156 | |
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157 | |
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158 | |
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159 | |
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160 | |
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161 | <font size="-1" color="#006633">type:</font> <font size="-1" color="#006633"><i>array</i></font> |
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162 | |
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163 | |
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164 | </h4> |
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165 | |
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166 | |
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167 | See COINMONTE |
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168 | |
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169 | |
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170 | <a name="#_triangule_c_keyword_BASIC"></a> |
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171 | <h4>BASIC |
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172 | |
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173 | |
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174 | |
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175 | |
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176 | |
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177 | |
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178 | |
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179 | |
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180 | </h4> |
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181 | |
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182 | |
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183 | Specify that the mask is on a basic grid (use the triangulation for vertical cuts and hovmoellers) |
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184 | |
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185 | |
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186 | <a name="#_triangule_c_keyword_KEEP_CONT"></a> |
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187 | <h4>KEEP_CONT |
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188 | |
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189 | |
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190 | |
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191 | |
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192 | |
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193 | |
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194 | |
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195 | |
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196 | </h4> |
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197 | |
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198 | |
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199 | To keep the triangulation even on the continents |
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200 | |
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201 | |
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202 | |
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203 | |
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204 | |
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205 | </pre><h3>Version history</h3> |
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206 | |
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207 | <h4>Version</h4> |
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208 | $Id: triangule_c.pro 370 2008-08-07 07:59:15Z pinsard $ |
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209 | |
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210 | <h4>History</h4> |
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211 | Sebastien Masson (smasson@lodyc.jussieu.fr) |
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212 | 26/4/1999 |
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213 | |
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214 | |
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215 | |
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216 | <h3>Known issues</h3> |
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217 | |
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218 | |
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219 | <h4>Todo items</h4> |
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220 | seb L.267->268 je ne pense pas que ce soit ce que tu voulais dire mais |
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221 | c'est la traduction de ce qu'il y avait écrit. Correction si besoin. |
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222 | |
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223 | <h4>Restrictions</h4> |
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224 | Data whose we want to do the contour must be disposed in a matrix. |
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225 | On the other hand, in the matrix, the points's arrangement can not be |
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226 | irregular. If it is, use TRIANGULE. |
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227 | |
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228 | |
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229 | <h3>Other attributes</h3> |
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230 | |
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231 | |
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232 | <h4>Uses routines</h4> |
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233 | <a href="../..//Obsolete/common.html">common</a> |
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234 | <a href="../..//Matrix/different.html">different</a> |
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235 | <a href="../..//ToBeReviewed/TRIANGULATION/definetri.html">definetri</a> |
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236 | |
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237 | |
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238 | |
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239 | |
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240 | |
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241 | <font size="-3"><p> </p></font> |
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242 | <hr size="1" color="#CCCCCC"/> |
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243 | |
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244 | |
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245 | |
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246 | |
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247 | <p><font color="gray" size="-3"> Produced by IDLdoc 2.0.</font></p> |
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248 | |
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249 | </body> |
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250 | </html> |
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