Thierry Lefebvre Ph.D. Email & Phone Number

Saint-Rémy-Lès-Chevreuse, Fr

Vélizy-Villacoublay, Île-De-France, France

Improvements of the scalability and performance of 3D virtual twins applications thanks to the implementation of 3DTiles-based technologies.The underlying objective is also to unify and facilitate the data exchange between brands (CATIA / GEOVIA / SIMULIA...) in order to improve all Dassault Systèmes applications interoperability.- Implementation of POCs to demonstrate the value of the technology- Specification of protocol with visualization teams- Implementation of data preparation tools - Algorithms (3D geometry decimation / Image compression / TIN tesselation / texture packing - no fit polygons...)- Transversal management for integration into Dassault systèmes web and native applications.

Vélizy-Villacoublay

GEOVIA City R&D Technology Senior Manager :Manage team in charge of city applicaitons development integrated to the Dassault Systèmes 3DEXPERIENCE Platform.The team's challenge is to be able to efficiently display a large number of GIS and 3D data composing virutal city twins, and to offer 2D/3D visualization tools of GIS data for analysis and simulation purposes.Few projects & customers : - Rennes 2030 :http://rennes2030.fr/- Virtual Singapore : https://www.nrf.gov.sg/programmes/virtual-singapore- Application video : https://www.youtube.com/watch?v=-O2UlWCx4gUManagement :- development team.- many internships supervisor- apprenticeship supervisor with ECE engineering school- hiring interviewsTechnologies :Real-time Rendering / Post-processing / PBR materials / VBO optimizations. Spatial structure (quadtree - R+tree..)Datasources (CityGML / GIS...) & datamodel Languages : Frontend : WebGL - GLSL / Javascript / HTML5 - CSS3Backend : NodeJS / Java / C++ / GDALPOC development using : - Redux / MobX / Web components- GIS features developments (heatmap, clustering, styling (SLD), viewshed, ...)- WebGL globe development (cesiumjs like) with atmospheric scattering.

Vélizy-Villacoublay

- CATIA geometric modeler : - C++ : develop polyhedral operators ( volume, centre of inertia,...) - CUDA : enhance performances of polyhedral operators using GPU (silhouette,...) - https://www.spatial.com/products/cgm- Realistic globe (@ scale 1 )development (C# - SharpDX)- Ocean simulation & rendering (clothoid based)- 3D Experience Platform : web3D (JS / WebGL)-internship supervisor

Boulogne-Billancourt Area, France

Develop softwares for Lighting Simulation (Customers : VALEO, Hyundai/Kia)Write specifications / implement (C++ / Qt / OpenGL) / validate / deliver / maintain.

Guyancourt, Fr.

PHD Thesis at the Technical Centre For Simulation (CTS) Of Renault in the framework of a cooperation with the Marne-la-Vallée University.I worked on lighting simulation to facilitate the study and validation of headlight distribution without the need of physical products. Specifically, I focused on studying material reflectance, such as road markings, road signs, dry or wet asphalt, in order to improve the simulation of the environment.Additionally, I worked on simulating the dazzle effect caused by tunnels and incoming vehicles to analyze driver behavior in hazardous driving situations.http://www.experts.renault.com/kemeny/phds/thierry_lefebvre/http://www.experts.renault.com/kemeny/projects/car_light_simulator/accueil.htmlhttps://pdfs.semanticscholar.org/5dc0/94381dfce4a0795baccf02a040a68d6622a6.pdfAlso work on display system calibration (icc profile / Sensics HMD / ...)

Guyancourt

Implementation of a dazzle effect module in the SCANeR II software for Renault driving simulators Mise en place d'un module d'éblouissement dans le logiciel SCANeR II pour les simulateurs de conduite Renault (client : Direction de l'Ingénierie des Equipements Carrosserie).Reference: Nishita research : http://nishitalab.org/user/nis/cdrom/pg/glare_m.pdfhttp://www.experts.renault.com/kemeny/projects/car_light_simulator/accueil.html

Les Ulis, Île-De-France, France

Etude et correction d'un phénomène de perturbation dans le domaine du radar secondaire (IFF).

Développement de site intranet en DHTML.

Doctor Of Philosophy - Phd, Computer Graphics

« Simulation d'éclairage réaliste de matériaux hétérogènes en temps réel ». (BTF, BRDF, photométrie, anti-aliasing temporel). Contrat.

Dea / Maïtrise / Licence / Deug, Mathematics And Computer Science

DEUG SM (Sciences de la Matière) / Licence Informatique / Maîtrise Informatique DEA Informatique Fondamentale et Applications (mention.

Bac E (S Option Tsa)