Workshop 3c Arch 200c 2012 Fall
Course	Arch 200c
Date	2012/10/04
Learning Objectives	Computational underpinnings of NURBS modeling. Project B Pinup.
Agenda	Computational underpinnings of NURBS modeling The "CAD Factory" approach Project B Digital Pinup (1hr)
Uses Tool(s)	Rhinoceros

Computational Underpinnings of NURBS Modeling

A broad-strokes overview of NURBS geometry , including its history, technical definition, and common applications.

Some relevant commands in Rhino:

Direction

Displays directionality of curves and surfaces, and allows one to modify or "flip" the direction.

Display of Backfaces

Hidden deep in the Display Options dialog box is a setting for displaying surface directionality at all times when modeling.

Extract Isocurve

Creates a curve along an isoparametric line of a surface.

Isocurve Show/Hide/Density

Controls how surface isocurves are displayed.

Shrink Trimmed Surface

Contracts the underlying untrimmed surface close to trimming boundaries. Also will make any surface that happens to be trimmed along an isoparametric line into an untrimmed surface.

Untrim

Use the Untrim command to remove a trimming boundary from a surface.

The "CAD Factory" Approach

Some relevant command for our lesson today:

Create Curve via Control Points

Create Curve via Interpolation

Create Curve via Handle Curve

Control Points On

Edit Points On

Handlebar Editor

Insert/Remove Knot

Project B Digital Pinup

Please post your most current work to the class "200c Commons" BOX.