TUTORIAL #4 – Precision Operations I - Extraction
GSAPP
FAB-TACTICS I
RHINO TUTORIAL
Keith Kaseman
Objective:
Continue to fine tune:
UV Extraction;
Curves from Objects;
Rebuilding;
Control Point Editing (Curves).
Explore: Surface from Network of Curves;
Iterative Network Surface development;
Strategic Contour Extraction;
Raster / Vector Composite Drawing;
Scaled Drawing Extraction.
RESOURCES
Refer to / utilize the following files posted on the Course Folder:
 04_k_kaseman_linked.ai
 04_Title_Align.ai
 04_demo.3dm
 04_Site_Envelope_Layout.3dm
MODELING
Import all three stretched “Zone” Surfaces (drawings 02, 03, 04 from Assignment #3) into
04_Site_Envelope_Layout.3dm.
Refer to 04_k_kaseman_linked.ai.
Use the saved / named view, A4 01 for drawings 01-08.
Note: Numbered headings correlate to drawings in final illustrator layout.
01:
UV Extraction & Projection
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02:
Extract four complex UV Curves from any / all of the three stretched “Zone” Surfaces from
Assignment #3.
Project each curve to a side plane of the Site Volume (one curve per face).
Illustrate as shown.
Control Point Editing – Curve Network Construction
 Using Control Point Editing and Rebuilding Techniques, adjust the four projected curves such that
they all meet at the corners of the Site Envelope. (Rebuild curves to approximately 12 points, 3
degrees). Do not join these curves to each other!
 In the long direction, Construct three additional curves, snapping to the end curves (as shown).
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Use Control Point Editing and Rebuilding Techniques to strategically deform these three curves
such that a productive Curve Network is constructed.
03:
Surface A1: Surface From Network of Curves
 Construct a Surface from Network of Curves using all five curves in the network (created above).
 In the Surface from Network of Curves dialog box, set both tolerance levels to 0.1.
 With the Isocurve Density set to 1, Extract Wireframe from newly created surface, and illustrate as
shown.
04:
Surface A2: Rebuilt Surface A1
 Copy and Paste Surface A1 into a new layer.
 Rebuild copied surface such that the point count in both U and V directions is approximately 20.
 With the Isocurve Density set to 1, Extract Wireframe from newly created surface, and illustrate as
shown.
05:
Strategic Section Extraction from Surface A2
 Extract two sections in each direction for strategic manipulation and construction of a new Curve
Network.
 Illustrate as shown.
06:
New Curve Network: Rebuilt / Edited
 Rebuild section curves extracted above to approximately 12 points, then using Control Point
Editing techniques, dramatically manipulate these curves into a new configuration for the Curve
Network.
 Illustrate as shown.
07:
Surface A3: Surface from Network of Curves
 Using the curve network constructed / edited in drawing 06, construct a Surface from Network of
Curves.
 With the Isocurve Density set to 1, Extract Wireframe from newly created surface, and illustrate as
shown.
08:
Offset Surface (Solid) – Composite Raster / Vector Drawing
 Copy and paste Surface A3 into a new layer.
 Using the OffsetSrf command, and the Solid option within the command, offset the copy of
Surface A3 into a 2’ “solid” polysurface.
 Analyze the Volume of this new “solid” and label as shown.
 Cut topographic contours at every 4’.
 Create a hidden line drawing with only the following turned on:
o Site Corners
o Surface A3 (NOT the newly created offset “solid”)
o Topographic contour lines
 Assign a 50% transparency and a basic white color as a rendering material to this object / layer.
 Render this view to a 1600 x 1200 pixel resolution – in PhotoShop, crop this rendered image to its
extents.
 Once operating in Illustrator, Place the rendered image under the Hidden Line Drawing to create a
Composite Raster / Vector Drawing as shown.
09:
Characteristic Plan – Scale 1” = 30’
 As shown in class, strategically cut contours of Surface A3 at every 4’ such that the general and
topological characteristics of the surface are readily conveyed in a plan view.
 Create a 2-d Drawing from the Top View – Export the 2-d Drawing to Illustrator AT A SCALE OF
30’ = 1” (in export dialogue box, as opposed to “Snapshot of Current View”).
10:
Stacked Cross Sections – Scale 1” = 30’
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Cut Cross Sections (using the Contour tool) from Surface A3 – at every 10’.
Systematically “Stack” the resultant sections by moving all sections down in the Z direction 10’ (as
shown in class).
From within the Front View, create a 2-d drawing of these “Stacked” Sections, then Export the
resultant 2-d Drawing to Illustrator AT A SCALE OF 30’ = 1” (in export dialogue box, as
opposed to “Snapshot of Current View”).
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