{"id":80,"date":"2008-02-15T08:41:06","date_gmt":"2008-02-15T07:41:06","guid":{"rendered":"http:\/\/www.ozone3d.net\/blogs\/lab\/?p=80"},"modified":"2011-09-07T20:16:04","modified_gmt":"2011-09-07T19:16:04","slug":"quick-review-generation-darbres-avec-dryadenglishquick-review-tree-generation-with-dryadenglish","status":"publish","type":"post","link":"https:\/\/www.ozone3d.net\/blogs\/lab\/20080215\/quick-review-generation-darbres-avec-dryadenglishquick-review-tree-generation-with-dryadenglish\/","title":{"rendered":"Quick Review – G\u00e9n\u00e9ration d’Arbres avec Dryad"},"content":{"rendered":"[French]\nDryad<\/a> est un g\u00e9n\u00e9rateur d’arbres. C’est une application OpenGL et il est disponible pour Windows et MacOS X. Dryad permet de s\u00e9lectionner un arbre \u00e0 partir d’un espace d’arbres (sur le cot\u00e9 droit de l’application) en utilisant une interpolation entre les diff\u00e9rents arbres se trouvant autour de la souris. Attention car Dryad est tr\u00e8s gourmand en m\u00e9moire et 2Go de ram sont vivement conseill\u00e9s. <\/p>\n

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Une fois le type d’arbre s\u00e9lectionn\u00e9, un clique sur l’icone des engrenages qui affiche les param\u00e8tres de l’arbre. Il est possible de tout param\u00e9trer: le tronc, les feuilles, les branches.<\/p>\n

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Sur l’image suivante, j’ai diminu\u00e9 le nombre de feuilles et l\u00e9g\u00e8rement incurv\u00e9 les branches du haut.<\/p>\n

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Mes r\u00e9glages aboutissent \u00e0 ce r\u00e9sultat final:<\/p>\n

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Dryad exporte votre cr\u00e9ation sous la forme d’un fichier OBJ. Celui de l’image pr\u00e9c\u00e9dente fait environ 62Mo, ouch! Le fichier OBJ est correctement g\u00e9n\u00e9r\u00e9 et est accompagn\u00e9 de son fichier de materiaux. En modifiant \u00e0 nouveau les param\u00e8tres, j’obtient un fichier OBJ de 2Mo qui contient environ 24000 faces. Ok chargeons-le maintenant dans HyperView3D:<\/p>\n

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Le probl\u00e8me est que les coordonn\u00e9es z et y sont invers\u00e9es. Mais HyperView3D poss\u00e8de une petite fonction pour rem\u00e9dier \u00e0 ce probl\u00e8me: la permutation des coordonn\u00e9es Y et Z des vertices. Vu que c’est un probl\u00e8me que l’on rencontre de temps en temps, cette petite fonctionnalit\u00e9 est utile.<\/p>\n

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Pour ceux qui veulent s’amuser avec ce mod\u00e8le OBJ, le voil\u00e0: Dryad_Tree.zip<\/a>.<\/p>\n

Conclusion: Dryad est un petit utilitaire pratique pour la g\u00e9n\u00e9ration d’arbres mais n\u00e9cessite une machine puissante. L’export en OBJ permet d’exploiter ses cr\u00e9ations dans toutes les applications 3D qui prennent en charge ce format (comme Demoniak3D<\/a> par exemple!).<\/p>\n

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Dryad<\/a> is a tree gnenrator. It’s an OpenGL application and is available for Windows and MacOS X. Dryad allows to select a tree from a space called “the space of all trees” (in the right side of the app). The tree is created by interpolation between all trees that lie near the mouse. Pay attention because Dryad is very memory-consuming and 2 Gb of ram is recommended.<\/p>\n

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Once you have select your tree, a click on the gearing icon displays the tree parameters. You can customize everything: trunk, leaves, branches.<\/p>\n

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On the following image, I reduced the number of leaves and slightly incurved the upper branches.<\/p>\n

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My adjustments end up to :<\/p>\n

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Dryad exports your creation in an OBJ file. The one of the previous image is a huge 62Mb OBJ file, ouch! The OBJ file is properly generated and comes with its materials file. 62Mb is too big, and after a few adjustments, I get a 2Mb OBJ file with approximately 24000 faces. Okay now let’s load it in HyperView3D:<\/p>\n

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Now the problem now is that Y and Z coordinates are reversed. But HyperView3D has a little function to solve this problem: the swap of Y and Z coordinates. Because we encouter this problem time to time, this little function is useful…<\/p>\n

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For those who want to play with that OBJ file, you can grab it here: Dryad_Tree.zip<\/a>.<\/p>\n

Conclusion: Dryad is a handy utility for trees generation but requires a powerful computer. The OBJ export makes it possible to exploit the trees in all 3D applications that can load this standard format (like Demoniak3D<\/a> for instance!).<\/p>\n","protected":false},"excerpt":{"rendered":"

[French] Dryad est un g\u00e9n\u00e9rateur d’arbres. C’est une application OpenGL et il est disponible pour Windows et MacOS X. Dryad permet de s\u00e9lectionner un arbre \u00e0 partir d’un espace d’arbres (sur le cot\u00e9 droit de l’application) en utilisant une interpolation entre les diff\u00e9rents arbres se trouvant autour de la souris. Attention car Dryad est tr\u00e8s gourmand en m\u00e9moire et 2Go de ram sont vivement conseill\u00e9s. … Continue reading Quick Review – G\u00e9n\u00e9ration d’Arbres avec Dryad<\/span> »<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[42],"tags":[238,241,240,638,239,72],"class_list":["post-80","post","type-post","status-publish","format-standard","hentry","category-tests-reviews","tag-dryad","tag-hyperview3d","tag-obj-file","tag-opengl","tag-tree-generation","tag-utility"],"aioseo_notices":[],"views":1372,"_links":{"self":[{"href":"https:\/\/www.ozone3d.net\/blogs\/lab\/wp-json\/wp\/v2\/posts\/80","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ozone3d.net\/blogs\/lab\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ozone3d.net\/blogs\/lab\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ozone3d.net\/blogs\/lab\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ozone3d.net\/blogs\/lab\/wp-json\/wp\/v2\/comments?post=80"}],"version-history":[{"count":0,"href":"https:\/\/www.ozone3d.net\/blogs\/lab\/wp-json\/wp\/v2\/posts\/80\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.ozone3d.net\/blogs\/lab\/wp-json\/wp\/v2\/media?parent=80"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ozone3d.net\/blogs\/lab\/wp-json\/wp\/v2\/categories?post=80"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ozone3d.net\/blogs\/lab\/wp-json\/wp\/v2\/tags?post=80"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}