{"id":55,"date":"2007-05-25T13:44:00","date_gmt":"2007-05-25T11:44:00","guid":{"rendered":"http:\/\/wordpress.callac.online\/index.php\/dessiner-et-nommer-un-point\/"},"modified":"2023-10-14T20:12:40","modified_gmt":"2023-10-14T18:12:40","slug":"dessiner-et-nommer-un-point","status":"publish","type":"page","link":"https:\/\/wordpress.callac.online\/index.php\/edition-mathematique\/metapost\/figures-geometriques\/dessiner-et-nommer-un-point\/","title":{"rendered":"Dessiner et nommer un point"},"content":{"rendered":"<p>En Metapost, un point est de type <em>pair<\/em>.<\/p>\n<p>Ainsi, pour d\u00e9finir les points A, B, C et D, on \u00e9crira la ligne :<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">pair A,B,C,D;<\/pre>\n<p>Pour d\u00e9finir leurs coordonn\u00e9es, on taper par exemple :<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">A:=(0,0);\nB:=(5u,0);\nC:=0.5[A,B];\nD:=(A+2B)\/3;<\/pre>\n<p>Remarquez que les coordonn\u00e9es sont donn\u00e9es comme des multiples de l&rsquo;unit\u00e9 <em>u<\/em> qui est d\u00e9finie en d\u00e9but de figure.<\/p>\n<p>Pour les dessiner, il y a plusieurs marque possibles que l&rsquo;on d\u00e9finit par la commande <em>marque_p:=\u00a0\u00bbtype de marque\u00a0\u00bb<\/em> o\u00f9 le type de marque est \u00e0 choisir parmi :<br \/>\n&#8211; \u00ab\u00a0rien\u00a0\u00bb : valeur par d\u00e9faut ;<br \/>\n&#8211; \u00ab\u00a0plein\u00a0\u00bb : disque noir ;<br \/>\n&#8211; \u00ab\u00a0creux\u00a0\u00bb : cercle ;<br \/>\n&#8211; \u00ab\u00a0croix\u00a0\u00bb.<\/p>\n<p>Pour tracer le point A, on a le choix entre le dessiner uniquement, ou le dessiner en le nommant. Les commandes sont :<br \/>\n&#8211; <em>pointe(A);<\/em><br \/>\n&#8211; <em>nomme.pos(A);<\/em><br \/>\n&#8211; <em>label.pos(btex $A$ etex,A);<\/em><\/p>\n<p><em>pos<\/em>est \u00e0 remplacer par les attributs de position de Metapost :<br \/>\n&#8211; <em> top <\/em> : en haut ;<br \/>\n&#8211; <em> bot <\/em> : en bas ;<br \/>\n&#8211; <em> rt <\/em> : \u00e0 droite ;<br \/>\n&#8211; <em> lft <\/em> : \u00e0 gauche ;<br \/>\n&#8211; <em> urt <\/em> : en haut \u00e0 droite ;<br \/>\n&#8211; <em> ulft <\/em>: en haut \u00e0 gauche<br \/>\n&#8211; <em> lrt <\/em> : en bas \u00e0 droite ;<br \/>\n&#8211; <em> llft <\/em> : en bas \u00e0 gauche.<\/p>\n<p>Voici un exemple d&rsquo;utilisation.<\/p>\n<figure id=\"attachment_527\" aria-describedby=\"caption-attachment-527\" style=\"width: 245px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\" aligncenter size-full wp-image-527\" title=\"Les points\" src=\"http:\/\/wordpress.callac.online\/wp-content\/uploads\/2007\/05\/jpg_figure2.jpg\" alt=\"Les points\" width=\"245\" height=\"169\" align=\"center\" \/><figcaption id=\"caption-attachment-527\" class=\"wp-caption-text\">Les points<\/figcaption><\/figure>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">input geometriesyr16.mp ;\n\n%------------------------------------------------------------------------\n% Exercice 1\n%------------------------------------------------------------------------\n\nu:=1cm;\nfigure (-8u,-8u,10u,8u);\npair A,B,C,D,E,F,G,H,O;\n\nA:=(0,0);\nB:=(6u,0);\nC:=(6u,4u);\nD:=(0,4u);\nE:=0.5[A,B];\nF:=0.5[B,C];\nG:=0.5[C,D];\nH:=0.5[D,A];\nO:=0.5[A,C];\n\nmarque_p:=\"plein\";\nnomme.llft(A);\nnomme.lrt(B);\nnomme.urt(C);\nnomme.ulft(D);\n\nmarque_p:=\"creux\";\nnomme.bot(E);\nnomme.top(G);\n\nmarque_p:=\"croix\";\nnomme.rt(F);\nnomme.lft(H);\n\npointe(O);\n\n\n\nfin;\n%-----------------------------------------------------------------------\n\n\n%-----------------------------------------------------------------------\nend ;<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>En Metapost, un point est de type pair. Ainsi, pour d\u00e9finir les points A, B, C et D, on \u00e9crira la ligne : pair A,B,C,D; Pour d\u00e9finir leurs coordonn\u00e9es, on&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2412,"menu_order":2,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-55","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Dessiner et nommer un point - Maths &amp; Num\u00e9rique<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/wordpress.callac.online\/index.php\/edition-mathematique\/metapost\/figures-geometriques\/dessiner-et-nommer-un-point\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dessiner et nommer un point - Maths &amp; Num\u00e9rique\" \/>\n<meta property=\"og:description\" content=\"En Metapost, un point est de type pair. 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