Pierre Étienne Bézier
|Died||25 November 1999(aged 89)|
|Alma mater||École Nationale Supérieure d'Arts et Métiers |
École Supérieure d'Électricité
|Known for||Bézier curve |
Conservatoire National des Arts et Métiers
Pierre Étienne Bézier (September 1, 1910 – November 25, 1999; [pjɛʁ etjɛn bezje]) was a French engineer and one of the founders of the fields of solid, geometric and physical modelling as well as in the field of representing curves, especially in CAD/CAM systems. As an engineer at Renault, he became a leader in the transformation of design and manufacturing, through mathematics and computing tools, into computer-aided design and three-dimensional modeling.
Born in Paris, Bézier was the son and grandson of engineers. He obtained a degree in mechanical engineering from the École nationale supérieure d'arts et métiers in 1930. He earned a second degree in electrical engineering in 1931 at the École supérieure d'électricité, and a doctorate in 1977 in mathematics from the Pierre-and-Marie-Curie University where he contributed to the study of parametric polynomial curves and their vector coefficients.
From 1968 to 1979 Bézier was Professor of Production Engineering at the Conservatoire National des Arts et Métiers.
He wrote four books and numerous papers, and received several distinctions including the Steven Anson Coons Award from the Association for Computing Machinery and an honorary doctorate from the Technical University Berlin. He was an honorary member of the American Society of Mechanical Engineers and of the Société Belge des Mécaniciens, president of the Société des Ingénieurs et Scientifiques de France, Société des Ingénieurs Arts et Metiers, and one of the first Advisory Editors of Computer-Aided Design magazine.
Bézier popularized but did not actually create the Bézier curve — using such curves to design automobile bodies. The curves were first developed in 1959 by Paul de Casteljau using de Casteljau's algorithm, a numerically stable method to evaluate Bézier curves. The curves remain widely used in computer graphics to model smooth curves.
Bézier developed the notation, consisting of nodes with attached control handles, with which the curves are represented in computer software. The control handles define the shape of the curve on either side of the common node, and can be manipulated by the user, via the software.
Bézier curves were adopted as the standard curve of the PostScript language and subsequently were adopted by vector programs such as Adobe Illustrator, CorelDRAW and Inkscape. Most outline fonts, including TrueType and PostScript Type 1, are defined with Bézier curves.
He began his 42-year tenure at Renault as a Tool Setter. In 1934, Bézier became Tool Designer and in 1945 became Head of the Tool Design Office. As Director of Production Engineering in 1949, he designed the "transfer machines" that produced most of the mechanical parts for the Renault 4CV. The transfer machines were high-performance work tools designed to machine engine blocks. While imprisoned during WWII, Bézier developed and improved on the "automatic machine principle" introduced before the war by General Motors. The new "transfer station", with multiple workstations and electromagnetic heads (antecedents to robots), enabled different operations on a single part to be consecutively performed by transferring the part from one station to another.
In 1957, Bézier became Director of the Machine Tool Division, responsible for the automatic assembly of mechanical components and for the design and production of numerical control drilling and milling machines. Bézier began managing technical development at Renault in 1960. He retired from Renault in 1975.
Bézier began researching CAD/Computer-aided manufacturing in 1960 while at Renault, focusing on the UNISURF system he developed for use with drawing machines, computer control, interactive free-form curves, surface design and 3D milling for manufacturing clay models and masters. UNISURF debuted in 1968 and has been in full use since 1975.
- "The Pierre Bézier Award". Solidmodeling.org. Archived from the original on 2009-09-30.
- "Dr. Pierre Bezier, Engineer, Inventor, Author, and Mathematician". Engology.com. Archived from the original on 2012-05-26.
- Bezier, Pierre (1977). Essai de définition numérique des courbes et des surfaces experimentales: Contribution à l'étude des propriétés des courbes et des surfaces paramétriques polynomiales à coefficients vectoriels (Thesis). Diss. Universite Pierre et Marie Curie (Paris VI).
- "Obituary". flutterby.com.
- "Renault History". Renault, via conceptcarz.com.