ucsd-compfab

Week 3.2 - Unrolling Surfaces

Agenda

3d Basics and Unrolling Surfaces

• Artist of the Day
• Unrolling Surfaces
• Work Time (Ex 4, Proj 1)
• Individual Project 1 Check-Ins
• Homework

Artist of the Day

Lawrence Malstaf

• Folding
• Shrink
• Portfolio website

Unrolling Surfaces

Example Unrolling Surfaces

Rhino file: unroll.3dm

Mesh to Flat Surface

• Simplify the mesh first (ReduceMesh command)

Unroll Surface command

• Flattening with UnrollSurf
  • works on “developable” surfaces, only curving in one direction:
    • vs.
  • Can you construct an approximate 3d shape from “developable” sections? see this sphere from strips:
    • 
• To specify where the unrolled polysurface will split
  • Use the UnjoinEdge command
  • Select the edges that should be open after unrolling.

Other 3D -> 2D Commands

• FlattenSrf draws a 2d outline of the developable surface in the construction plane.
• Smash flattens double curved surface.
• Squish and SquishBack
  • 

Other Re-Meshing Commands

• ShrinkWrap
  • 
• QuadRemesh
  • 

Homework

• Exercise 4: Papercraft DUE Tuesday 10/22 Design and Fabricate
• Work on Project 1

Reference

• https://www.polyhedra.net/en/
• Exact Flat for Rhino

Other Software

Free

• Blender https://www.blender.org/download/ (free)
  • Export Paper Model extension: https://extensions.blender.org/add-ons/export-paper-model/ (free)
• Papercraft: https://github.com/rodrigorc/papercraft (free, open source Mac or Windows)
  • (you have to build it on Mac with rust/cargo)

Paid

• Pepakura Designer: https://tamasoft.co.jp/pepakura-en/ (Windows $$)
• Unfolder: https://www.unfolder.app/ (Mac $$, free trial)
• Papermaker: https://papercraft-maker.com/ (online, $$ to export)

Video Tutorials

Rhino Unroll Surfaces

• Rhino 3d unfolding: https://www.youtube.com/watch?v=uhpe1p03Av0
• Becky Chierichetti round complex curve organic shape to papercraft with Rhino: https://www.youtube.com/watch?v=f27CniZ5ErA
• RhinoGuide 3D to 2D to 3D: https://www.youtube.com/watch?v=xhmDp1_rXGk
• Unfold polysurface unroll surface and labels: https://www.youtube.com/watch?v=I2A0Mme6by4
• Digital Design Unit - TU Darmstadt Curved folding with Rhino https://www.youtube.com/watch?v=du2VN2rhNgM - simulation and unrolling
• Origami folding with Rhino and Kangaroo https://www.youtube.com/watch?v=htxKMyhoe5k

Rhino to Pepakure

• Unfold a Rhino model using Pepakura software https://www.youtube.com/watch?v=PnO7Ebl5yb0

Blender for Papercraft

• Blender for Papercraft https://www.youtube.com/watch?v=2qwZGWjhtcM
• Export blender as paper model https://www.youtube.com/watch?v=2_RSrkYBcUI