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Bien entendu, lorsque Henri Poincaré énonçait cette malicieuse vérité, l'informatique n'existait pas encore. Mais les figures exemptes de fautes que nous livre l'ordinateur sont-elles issues d'un juste raisonnement ? Le dessin libre en tant que support de la pensée créatrice est-il resté irremplaçable, malgré la révolution numérique ? Cet ouvrage propose de répondre à ces questions, en s'appuyant sur une méthode inédite, véritable outil de recherche formelle, de création, mais aussi de compréhension des volumes et de communication autour d'un projet. Les 400 figures tracées à main levée directement à la craie au tableau noir, par la prise de risque qu'elles supposent, restent le meilleur moyen de plonger les lecteurs au cœur même de ces "raisonnements corrects" tout en les persuadant que si elles sont "mal dessinées", leur justesse et leur pertinence demeurent. L'auteur livre ainsi à ses lecteurs une synthèse originale de ce qui fut longtemps le corpus incontournable des sciences appliquées à l'art dans les écoles supérieures, à partir d'exercices de géométrie simple jusqu'à la géométrie descriptive, pour exploiter efficacement les multiples ouvertures qu'ils autorisent : l'architecture, le design, la sculpture, la cristallographie, le nombre d'or, la mathématique des surfaces... Toutes les parties constituantes de la perspective sont présentées selon leur domaine d'application, depuis les axonométries jusqu'à une méthode à trois points de fuite. Ce traité se destine donc aux étudiants d'écoles d'architecture et d'art, aux designers, illustrateurs, architectes et historiens d'art, mais aussi à tout public curieux d'appréhender ces disciplines fondamentales par la géométrie qui les réunit, entre les arts et les sciences.

Geometry, Descriptive --- Perspective --- Geometry in architecture --- Handbooks, manuals, etc. --- Géométrie descriptive --- Géométrie en architecture --- Guides, manuels, etc.

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Architect Preston Scott Cohen combines the use of the most advanced digital modeling technologies with a fascination for 17th century descriptive geometry. He uses familiar forms distorted by oblique projections and similar devices to create complex designs that challenge our preconceptions about the nature of order in architecture.Contested Symmetries and Other Predicaments in Architecture features Cohen's intricate abstract geometries and lucidly describes both the mechanics and the theory behind their application. A wealth of projects, including the widely acclaimed Torus House, are represented through drawings, models, and computer-generated images.

Architecture --- Geometry in architecture. --- Symmetry (Art) --- Geometry, Projective. --- Architecture --- Architecture --- Architecture --- Géométrie en architecture --- Symétrie (Art) --- Géométrie projective --- Architecture --- Architecture --- History --- Computer-aided design. --- Computer-aided design. --- Histoire --- Conception assistée par ordinateur --- Conception assistée par ordinateur --- Cohen, Preston Scott --- Themes, motives.

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"The flowering of Gothic architecture depended to a striking extent on the use of drawing as a tool of design. By drawing precise 'blueprints' with simple tools such as the compass and straightedge, Gothic draftsmen were able to develop a linearized architecture of unprecedented complexity and sophistication. Examination of their surviving drawings can provide valuable and remarkably intimate information about the Gothic design process. Gothic drawings include compass pricks, uninked construction lines, and other telltale traces of the draftsman's geometrically-based working method. This book offers a new perspective on Gothic architectural creativity. It shows, in a series of rigorous geometrical case studies, how Gothic design evolved over time, in two senses: in the hours of the draftsman's labor, and across the centuries of the late Middle Ages"--Provided by publisher.

Architectural drawing, Medieval. --- Architecture, Gothic --- Geometry in architecture --- Dessin d'architecture médiéval --- Architecture gothique --- Géométrie en architecture --- Designs and plans --- History --- Dessins et plans --- Histoire --- Architectural drawing --- 721.02 --- 72.033.5 --- Gothic architecture --- Christian antiquities --- Church architecture --- Drawing, Architectural --- Plans --- Architectural design --- Communication in architectural design --- Drawing --- Mechanical drawing --- Arbeidsmethoden: architectuurtekeningen; bouwmodellen; maquettes --- Gotische bouwkunst. Architectuur van de late-Middeleeuwen --- 72.033.5 Gotische bouwkunst. Architectuur van de late-Middeleeuwen --- 721.02 Arbeidsmethoden: architectuurtekeningen; bouwmodellen; maquettes --- Dessin d'architecture médiéval --- Géométrie en architecture --- Architectural drawing, Medieval --- Architecture --- Medieval architectural drawing --- Composition, proportion, etc.

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Architecture --- Architectural design. --- Geometry in architecture. --- Fractals. --- Design architectural --- Géométrie en architecture --- Fractales --- Composition, proportion, etc. --- Composition, proportion, etc --- 514 --- 72.01 --- Architectural design --- -Fractals --- Geometry in architecture --- #KVIV:BB --- 51 --- 72 --- 72.012/013 --- 745 --- Fractal geometry --- Fractal sets --- Geometry, Fractal --- Sets, Fractal --- Sets of fractional dimension --- Dimension theory (Topology) --- Architecture, Western (Western countries) --- Building design --- Buildings --- Construction --- Western architecture (Western countries) --- Art --- Building --- Design --- Structural design --- Geometry --- Architectuurtheorie. Bouwprincipes. Esthetica van de bouwkunst. Filosofie van de bouwkunst --- Wiskunde --- Meetkunde --- Geometrie --- Architectuur --- Ontwerp (architectuur) --- Fractals --- Fractale structuren --- Design and construction --- 510.8 --- architectuur --- compositie --- fractals --- ontwerpen --- wiskunde --- wiskunde, grafische rekenwijzen en voorstellingen - numeriek rekenen, fractals --- 72.01 Architectuurtheorie. Bouwprincipes. Esthetica van de bouwkunst. Filosofie van de bouwkunst --- 514 Geometry --- Géométrie en architecture --- Proportion (Architecture) --- Composition (Art) --- Proportion --- 72.01 Theory and philosophy of architecture. Principles of design, proportion, optical effect --- Theory and philosophy of architecture. Principles of design, proportion, optical effect