1. Development of an Intuitive 3D Sketching Tool B. de Vries, A.J. Jessurun, M. Engeli

2. 3D Modeling Support: Current Status Application: Emphasis on Drawing and Presentation, not on Design Technology (focus of this presentation): Geometrical Representation Interface

3. Geometrical Representation Stack of operations on primitives (e.g. stretch, twist) Parameterized objects (e.g. length, width) Representation consistency vs. design evolution

4. Interface Unaware of geometrical representation 6 DOF input devices are troublesome New technologies: Touch sensitive LCD screen, Voice recognition Performing unreal operations is most interesting New metaphor instead of Mouse & Windows

5. DDDoolz objectives Minimal set of commands Easy creation and manipulation of masses and spaces Easy visual evaluation of the created model Claying metaphor LCD sketchpad Integration with design database

6. Basic Principle: Face Orientation Method Drag and Copy

7. System Features Sketch Straight Array Curve Navigate Walk Fly Orientate Move Delete Rotate model Import 3DS, Export to Autocad

8. Implementation World Up: Geometrical primitives, scripting, rendering Sketch device: Wacom sketchpad or Mouse Navigation device: Trackball or Mouse Free distribution of WUP player

9. Demo

10. Experiences First Years’ CAAD course: No learning Curve and Time Performance limits Design model Architectural office: Boxes used as Spaces Quest for Box dimensions adjustment

11. Improvements Group Boxes into Building Elements Boolean operations & Clipping Box Texture mapping Adjustable Box dimensions

12. How to get www.ds.arch.tue.nl/Research/DDDoolz