Give an eight-step procedure for constructing pictorials by inverse tracking of surfaces.

Question

What will be an ideal response?

Answer 1

The process of tracking vertices and edges to create a mental image, or a pictorial drawing, from a multiview drawing is a slow but reliable method. However, after gaining experience doing this, some people may find it faster and easier to skip this process and go directly to the surface tracking. The eight-step model creation process is the same as that used with points and edges except for some slight modifications.


Step 1: Define the location and directions of a coordinate system consistent in all views.


Step 2: Define an anchor surface.


Step 3: Mark the limits of the foundation volume.


Step 4: Locate a surface adjacent to the anchor surface and draw its boundary.


Step 5: Successively locate other adjacent surfaces and draw those boundaries.


Step 6: Convert hidden lines.


Step 7: Add internal features.


Step 8: Check model validity.