Introduction to Surfaces

1
Introduction to Surfaces

• Surface modelling
• No physical properties, no clash detection, no
  Union command
• Can hide, use 3D modify commands
• New topics
• 5 types of surfaces
• Revolved
• Tabulated
• Ruled
• Edge defined
• 3D mesh
• Script files

2
Have a Go

• Start by following 3D Surfaces notes
• Then try 2 example sheets
• Tabulated Surface Example
• Open the Tabsurf template
• New current, layer
• Create Polyline boundaries for each shape
• Draw, Boundary, ltobject type to Polylinegt ..
• Draw the lines and tabsurf
• Remember When you change the SURFTAB1 value you
  must erase the surface and then create it again.
• Ruled Surface Example
• Open the Rulsurf template and complete the
  example
• Take Surfaces Quick Reference Sheet

3
Further Work

• Surfaces Exercises 1-5
• Ruled Surfaces Example
• Complete this example without using the template.
• Hints
• Draw the straight lines
• Then for the arcs
• Move the UCS origin to end of one of the arcs
• Complete the arc using relative co-ordinates for
  the second point.
• Move the UCS origin to the start of the other arc