TechTalk about different 3D technologies and there use in CAD Systems

1. Raytracing and the usage in Computer Aided Design-programs 1 University of Business, Design and Technology - English

2. Table of Contents Basics OpenGL general description and functionality Constructive solid geometry (CSG) Raytracing global lighting model Raytracing importance for CAD CAD modeling Implementation of render technologies Generative Modeling Language for architectural Design CAD as basis for generative manufacturing method using the example of product design 2 University of Business, Design and Technology - English

3. Basics OpenGL general description and functionality Constructive Solid Geometry (CSG) Raytracing global lighting model Raytracing importance for CAD 3 University of Business, Design and Technology - English

4. general description and functionality 2-divided render pipeline vertex operations -> form surfaces of objects pixel operations -> operations to give pixels a color value post processing result is displayed by frame buffer 4 University of Business, Design and Technology - English Pixel operations (AA,HDR etc.) vertex operations

5. Constructive Solid Geometry High-Level Graphics API simplify computer graphics because many computations are done automatically by CSG used to build complex objects/structures good interaction with Raytracing algorithms 5 University of Business, Design and Technology - English simple example complex example Photo of a raytraced CSG image

6. Basics OpenGL general description and functionality Constructive Solid Geometry (CSG) Raytracing global lighting model Raytracing importance for CAD 6 University of Business, Design and Technology - English

7. global lighting model local lighting models: material computation for every single object global lighting models: computation of the whole scene computation complexity makes real-time raytracing (nearly) impossible 7 University of Business, Design and Technology - English Gouraud Shading

8. global lighting model algorithm functionality 8 University of Business, Design and Technology - English

9. Raytracing importance for CAD most realistic illustration of graphical models large scalability point of interest of current research -> large number of good programs 9 University of Business, Design and Technology - English big city rendering raytraced model of Porsche Carrera GT2

10. CAD modeling Implementation of render technologies for CAD Generative Modeling Language for architectural design CAD as basis for generative manufacturing method using the example of product design 10 University of Business, Design and Technology - English

11. Implementation of render technologies for CAD Basics are OpenGL SL and CSG API Main focus is an easy user interface and simple-named facility possibilities limitation of functions and primitives, concerning special aspects of usage Example: shearing of objects and complex NURBS not necessary for architecture because building this is impossible 11 University of Business, Design and Technology - English

12. CAD modeling Implementation of render technologies for CAD Generative Modeling Language for architectural design CAD as basis for generative manufacturing method using the example of product design 12 University of Business, Design and Technology - English

14. scene consists of sequentially computed formulae instead of a collection of objects

15. fast and easy generation of highly complex structures

16. Advantages:

17. highly scalable

18. fast

19. high level of detail

20. Very smooth impression of generated structures

21. Disadvantages:

22. rather complex style programming

23. cryptic language13 University of Business, Design and Technology - English

24. Generative Modeling Language for architectural design University of Business, Design and Technology - English 14 GML model of the cologne cathedral

25. Generative Modeling Language for architectural design procedural model of a metropolis University of Business, Design and Technology - English 15 procedural model of pompeii

26. Generative Modeling Language for architectural design another big aspect in architecture: lighting with the help of raytracing, very accurate 3D models possible 16 University of Business, Design and Technology - English Picture of an Exhibition with Relux Outside-to-Inside-View with AVE exterior view of a buildbing, made with AVE

27. CAD modeling Implementation of render technologies for CAD Generative Modeling Language for architectural design CAD as basis for generative manufacturing method using the example of product design 17 University of Business, Design and Technology - English

28. CAD as basis for generative manufacturing method using the example of product design displaying problem of complex forms rather contradictory aims in visualization CADs for product design are compromises and collections of many technologies 18 University of Business, Design and Technology - English

29. CAD as basis for generative manufacturing method using the example of product design example of industrial design: car design and development 19 University of Business, Design and Technology - English 3D model of Lamborghini LP640, done with Maya raytraced model of a Porsche Carrera GT2, done with 3ds max

30. CAD as basis for generative manufacturing method using the example of product design example for product design: a ball pen as an item for mass production 20 University of Business, Design and Technology - English The design of a ball pen, created by Katja Albrecht (student of product design at HS Wismar)

32. lighting in Relux: ezzatbaroudi.wordpress.com

33. cars: open test renderings from some forums

34. AVE renderings: http://www.vrvis.at/rendering/applications/architecture/?sid=-48f9cfd4

35. procedural modeling results: www.digitalurban.blogspot.com

36. GML pictures of the cologne cathedral: result of Sven Havemann‘s theses (TU Braunschweig)

37. raytracing illustration, shading models, vertex example & render pipeline: wikipedia

38. HDR Image OpenGL: Futuremark 3D

39. Information:

40. www.wikipedia.de

41. www.generative-modeling.org

42. www.opengl.org

43. http://www.autodesk.com/techpubs/aliasstudio/2009/

44. various scripts of german and international universities/ facilities of higher education

45. www.cgal.com

46. http://gts.sourceforge.net

47. http://opencsg.org/

48. http://www.solidgraphics.com/21 University of Business, Design and Technology - English