Cnc Domentos

About Freeform Origami (0.1.x Alpha)
Tomohiro Tachi∗
September 8, 2011

1

Overview

Freeform Origami is a Win32 software written by Tomohiro Tachi for enabling interactive design
of three-dimensional origami based on continuously modifying origami shapes under several
geometric constraints.
c
Freeform Origami ⃝Tomohiro Tachi 2008-2011. All rights reserved.
The now-released or lowerversion of the software is a proprietary freeware applying the following
terms of use.

1.1

Terms of Use

1. Non-commercial redistribution is allowed, if and only if the software is distributed without
any change and with this document.
2. The user is allowed to use the software if and only if the work achieved using the software including research publications, exhibitions, educationalworkshops, and architectural/product designs, (henceforth resulting works), satisfy either (or both) of the following
conditions.
1. (Personal Use): The resulting works are personal, i.e., neither public, educational,
nor commercial.
2. (Non-Personal Use with Attribution): The resulting works express a proper reference to the software or to the related paper publication.
3. Any other type ofusage of the software is prohibited, i.e., requires author’s explicit permission.

1.2

URLs

• The software is downloadable from http://www.tsg.ne.jp/TT/software/#ffo.
• Any questions and bug reports are planned to be responded at freeform origami group at
curvedfolding.com (http://www.curvedfolding.com/group/freeformorigami/).

1.3

Papers

For technical details of the software,the following references can help.
∗

Department of General Systems Studies, The University of Tokyo, 3-8-1 Komaba, Meguro-Ku, Tokyo 1538092, Japan, tachi@idea.c.u-tokyo.ac.jp

1

• Tomohiro Tachi, ”Generalization of Rigid-Foldable Quadrilateral-Mesh Origami,” Journal
of the International Association for Shell and Spatial Structures (IASS), 50(3), pp. 173–
179, December 2009.
• TomohiroTachi, ”Freeform Variations of Origami”, in Proceedings of The 14th International Conference on Geometry and Graphics (ICGG 2010), Kyoto, Japan, pp. 273–274,
August 5-9, 2010.
• Tomohiro Tachi, ”Freeform Rigid-Foldable Structure using Bidirectionally Flat-Foldable
Planar Quadrilateral Mesh”, Advances in Architectural Geometry 2010, pp. 87–102,
September 2010.

2
2.1

Basic User InterfaceScreens

FreeformOrigami.exe shows the screen like Figure 1.
Left pane 3D View. Shows 3D view of the model when the model is loaded. Most of manipulation is done on this screen.
Right Upper pane Crease pattern. Shows the developed pattern of the form when ”developable” constraint is activated (check Sytem→developable).
Right Down pane Flat-folded pattern. Shows the X-ray view of the form inthe completely
flat-folded state if ”flat-foldable” constraint is activated (check Sytem→flat-foldable).

2.2

Coloring Scheme

The edges are colored according to the crease property. These assignment can be changed using
Tool→assign.
Red
Blue
Dark Gray
Light Gray

2.3

Mountain
Valley
General Crease
Triangulation

Changing View

In order to change view, use mouse:
Rotate View: Use Right Button Drag for 3D rotation (for 3D view) and 2D rotation (for
crease pattern and flat-folded pattern views).
Pan View : use Middle Button Drag or Shift + Right Button Drag for panning.
Zoom View : use Wheel to zoom up and down.
Most of other operations are done by left click/drag, selecting menu, or pressing key, and their
combination depending which tool you are using.

2.4Simulation Mode vs. Edit Mode

The software runs in two different mode ”Simulation Mode” and ”Design Mode.” The default
mode is defined by “System → Simulation First” check list. Only while you press Tab key, the
software runs in the opposite mode.

2

Crease Pattern

3D View

Flat-Folded Pattern

Figure 1: Screen shot of the software.
Simulation Mode When the background color of...