Regular polygons can be created by using
Curve > Primitive > Cirlce
with "Object Degree" as 1. The "Sections" will then control the number of sides.
Remember to detach the resulting curves at the knot points before using it to create surfaces. Try experimenting with "Obeject degree" as 1 with surface primitives as well.
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Workflow: Alias to/fro ProE
Alias and ProE are used in a complimentary fashion in many companies. Data transfer issues are usually caused by incompatible ways in which Alias and ProE operates.
- By default higher degree NURBS data is converted to cubic polynomial upon import into ProE.
- By default ProE uses relative tolerance system.
- By default ProE uses INCH as unit measurement.
Detach function allows splitting curves and surfaces at different U and U,V parameters.
Click on any iso parameter to create a locator. To create additional locator, click with SHIFT key pressed. Once the locator is created it can be located anywhere on the surface by dragging. By pressing ALT key while moving the locator, it can be snapped to mid parameters. By clicking + CTRL key the locator can be snapped to the iso-parameter curve. You can also snap the locator to an external geometry by pressing CTRL+ALT key.
Controls updates of animation expressions, constraints, construction history and locators.
By default the history updates is switched off during transformation. Current machines with powerful processors, can handle most of the history updates on the fly during transformation. Try switching on the option. It can be switched off if the updates take too long.
The advantages of interactive feedback while modeling is of tremendous value. For example, while using the Align function, the modifier CVs of the master can be tweaked and the effect on the aligned surface is instantaneous and interactive. The feedback is also valuable for beginners to understand surface modifications.
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There are different ways in which the model can be view .. ALT+SHIFT and move movement, the tumble icon and the new view box. The tumble icon 
was the first one to appear in Alias and has some special function. With the left mouse button pressed in the icon the model can be viewed in all directions. With middle mouse button pressed, the viewpoint will rotate around the Z axis and with right mouse button the viewpoint will rotate around the horizontal axis.
This method can be used to check quality of lines/curves and their relation by parallel ax method.
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