1. Three-Dimensional Modeling

2. Types of Models  Wireframe  Surface  Primitive  Solids

3. Wireframe Models

4. Wireframes do not make good models The same edge and vertex list can describe different objects depending on how they are interpreted.

5. Surface Model  Wireframe with a cover  Hollow  Only benefit: visualization

6. Primitives  Three-Dimensional Geometric Figures are combined to form a model

7. Common Geometric Primitives

8. Boolean Operations

9. Solids Modeling  Mechanical Engineering Applications  Begin with a “Solid” piece of material  Manufacture of Prototypes  Design to Manufacture  Recently Available  AutoDesk and GeoPak are developing Civil Engineering Applications

10. Solids Modeling Example: Science Fair Rotor was drawn using ProEngineer Rotor drawing was downloaded to the CNC machine which then produced the part.

11. Solids Modeling Example: Science Fair Completed Rotor Generator

12. Methods of constructing models  Coordinates  Extrusion  Primitives

13. Coordinate Method

14. Coordinate Method (continued)

15. Combination of Methods

16. MicroStation Wireframe

17. Solids Modeling Parametric Specification of a Cylinder

18. Solids Modeling Software