1. CAD Modelling/Drawing

2. 3D CAD Modelling types - Wireframe  These types of drawings only show the structure of the object drawn.  No other details are shown.

3. 3D CAD Modelling types - Surface Rendered  These types of drawings show the objects as solid shapes.

4. 3D CAD Modelling types - Surface Rendered  You can view surface detail as a rendered block.  It looks realistic due to the highlights and shading generated by the package.  This allows high quality drawings to be produced very quickly.  It also means that very realistic models of a design can be produced without having to manufacture them, saving design firms time and money.

5. 3D CAD Modelling Types – Solid  3D model is built up using simple geometric forms such as cones, cylinders, prisms and cuboids.  These can be added or subtracted to produce complex 3D models.

6. 3D CAD Drawings  As all 3D packages use different commands to produce shapes so you will not be asked to name any of these commands in your exam.  You should however, be aware of some of the things that can be done using these packages.

7. 3D CAD Drawings  There are certain things common to all 3D packages and this is how the shapes are produced.  You can:  combine shapes  subtract them from each other  add them together  obtain the orthographic views of the 3D object using one command.

8. 3D CAD Drawings - Combining Shapes  Shapes can be combined.

9. 3D CAD Drawings - Subtracting Shapes  Shapes can be subtracted from each other.

10. 3D CAD Drawings - Adding Shapes  You can add shapes to each other.

11. 3D CAD Drawings - Orthographic Views  You can use one command to obtain the 3 orthographic views of the object. Elevation Plan End Elevation

12. 3D CAD Drawings  There are a huge number of other things you can do with 3D CAD packages.  It is because of the speed that these very realistic drawings can be produced at that design companies have moved to using these type of drawing packages.

13. 3D CAD Drawings - Advantages  An orthographic drawing of an object can be produced by the software by clicking a button.  Very realistic objects can be designed very quickly.  Because these designs are so realistic and can be made to look like the actual material they will be made from, clients can see exactly what is being made so a physical model is not required, reducing costs and the time it takes to design a new product. Return