Title: Theory / Unimportant / Art / Origami{ / Theory
Tags: récupéré MissingMedia hasSeenConjDef checkFrench complexity computer_to_instruction

Name: Traditional rules of Origami
Definition: One sheet of paper
Page: 3, 11
Chapter: 1, 2
Definition2: No cuts
Conjdef: All of
Definition3: No compass/ruler

Name: Mountain folds
Definition: A fold forming a ridge
Page: 11
Chapter: 2
Notation: chain
Definition2: A fold of negative angle

Name: A valley fold
Definition: A fold forming a trough (creux)
Page: 11
Chapter: 2
Context: Origami
Definition2: A fold of positive angle
Representation: dashed line

Name: A crease
Definition: A line left by folding and unfolding paper
Page: 11
Chapter: 2

Name: The fold angle
Definition: The angle of the paper, assuming we consider the part of the paper in a plane perpendicular to the fold
Page: 12
Chapter: 2

Name: Fold's characteristic
Definition: montain or valley
Page: 12
Chapter: 2
Definition2: sharp lines/rounded folds
Conjdef: all of
Definition3: Angle

Name: The near layer
Definition: The layer closest to you
Page: 14
Chapter: 2
Section: 1

Name: The far layer
Definition: The layer on the bottom
Page: 14
Chapter: 2
Section: 1
Context: Origami

Definition: Lines on a part of the paper hidden by other part of the paper
Page: 15
Chapter: 2
Section: 1
Notation: Dotted lines

Definition: creases
Page: 15
Chapter: 2
Section: 1
Notation: Thin line stopping before they reach the edge of the paper

Definition: show the application of pressure (usually in connection with a reverse or sink fold)
Page: 16
Chapter: 2
Section: 1
Context: Origami
Notation: Open hollow arrow

Definition: Indicate to turn the paper
Page: 16
Chapter: 2
Section: 1
Context: Origami
Notation: Arrow that incorporate a loop

Definition: Rotating the paper by the angle indicated, in the plane of the page.
Page: 16
Chapter: 2
Section: 1
Context: Origami

Definition: Indicates the vantage point from which a subsequent view is taken
Page: 17
Chapter: 2
Section: 1
Context: Origami

Definition: Repeat the steps indicated
Page: 17
Chapter: 2
Section: 1
Context: Origami

Definition: The fold is 90° angle of the other fold
Page: 17
Chapter: 2
Section: 1
Context: Origami

Definition: Create a valley fold
Page: 18
Chapter: 2
Context: Origami

Definition: Create a mountain fold
Page: 18
Chapter: 2
Context: Origami

Definition: Create a mountain fold between another layer
Page: 18, 19
Chapter: 2
Context: Origami

Definition: Unfold the layer
Page: 20
Chapter: 2
Context: Origami

Definition: Pull paper out from inside the model
Page: 20
Chapter: 2
Context: Origami

Definition: Valley fold and unfold to create a crease
Page: 20
Chapter: 2
Context: Origami

Definition: Mountain fold and unfold to create a crease
Page: 21
Chapter: 2
Context: Origami

Name: Crease pattern
Definition: The pattern of the creases, on the paper, as if the origami were made and then unmade.
Page: 21
Chapter: 2
Context: Origami

Page: 21
Section: 2
Time complexity: NP-complete
Extra: problem
Effect: Given a paper with crease on it, find orientation such that the folding is possible.
Context: Origami

Definition: Creases that lie flat
Page: 22
Chapter: 2
Context: Origami crease pattern
Notation: Thin gray lines

Definition: Creases that are valley fold lines
Page: 22
Chapter: 2
Context: Origami crease pattern
Notation: Dashed colored line

Definition: Creases that are mountain fold lines
Page: 22
Chapter: 2
Context: Origami crease pattern
Notation: Solid black line

Name: An assigned cease pattern
Definition: A cease pattern whose mountain/valley folds are distinctly labeled
Page: 22
Chapter: 2
Name2: A cease-assigned cease pattern

Name: An unassigned cease pattern
Definition: A cease pattern whose mountain/valley folds are not distinctly labeled
Page: 22
Chapter: 2

Name: Inside reverse fold
Page: 23
Chapter: 2
Intuition: A fold used to change the direction of a flap.

Name: Outside reverse fold
Page: 24
Chapter: 2
Section: 1
Index: 22
Kind: Fig

Question: By default, a reverse fold is
Answer: inside
Page: 25
Chapter: 2
Section: 1
Index: 22
Kind: Fig

Name: Hybrid reverse fold
Page: 25
Chapter: 2
Section: 1
Index: 23
Kind: Fig

Name: Rabbit-ear fold
Definition: Folding along each bisector of a triangle
Page: 25
Chapter: 2
Section: 1
Index: 23
Kind: Fig
Definition2: A figure which sends each edge to a common line

Smaller0: on the bisectors
Greater0: each folded edges lines on the same line
Page: 25
Chapter: 2
Section: 1
Smaller to greater: iff
Prefix Smaller: Rabbit-ear is folded

Name: Double rabbit ear
Definition: combination of a rabbit ear with its mirror image also on another layer.
Page: 27
Chapter: 2
Section: 1
Index: 37
Kind: Fig

Name: Squash fold
Definition: layers of a flap are spread to the sides and the folded edge flattened.
Page: 27
Chapter: 2
Section: 1
Index: 28
Kind: Fig

Name: A Swivel fold
Page: 28
Chapter: 2
Index: 30

Name: A Petal fold
Page: 28- 30
Chapter: 2
Index: 31, 34
Definition2: (avoid when you are not new to this)
Conjdef: Starting at
Intuition: Make a flap both narrow and longer

Name: A pleat
Page: 31
Chapter: 2
Context: Origami
Index: 36
Intuition: Allow to shape flaps
French: Pli

Name: A crimp
Page: 31
Chapter: 2
Index: 36
French: crêpage/ondulation

Name: A gusset
Definition: Something obtained by stretching pleat/crimp enough.
Page: 33
Chapter: 2
Index: 39
Intuition: It maintains pleat/crimp in place

Name: A spread sink
Definition: a flap is lifted up, its edges are spread symmetrically, and the result is flattened.
Page: 34
Chapter: 2
Index: 41

Name: An open sink
Definition: a simple inversion of a corner formed from a region in the interior of the paper.
Page: 34, https://www.quora.com/What-is-open-folds-and-close-folds
Chapter: 2
Index: 41
Conjdef: Obtaining
All the pleats are free of each other. The hole resembles an X.

Name: Double sink
Page: 36
Chapter: 2
Index: 44
Intuition: Combining a sink and its miror

Name: A sink
Page: 34, 37
Chapter: 2
Index: 45

Name: A closed sink
Page: 37
Chapter: 2
Context: Origami
Index: 45, 46
Definition2: Rabbit ear
Conjdef: Obtaining All pleats are bound to a neighbour pleat. The hole resembles an I.
Hide remaining def: yes

Name: Mixed sink
Definition: Two of the pleats are together, the two others (to the left) are still free of each other
Page: 38
Chapter: 2
Index: 47

Name: Unsink fold
Definition: pulling a layer upward
Page: 39
Chapter: 2
Index: 47

Name: One-crease elephant
Page: 41
Chapter: 3
Index: 1

Name: Elegance
Definition: a sense of fitness, of economy of effort
Page: 43
Chapter: 3

Name: Elegant fold
Definition: A fold whose creases seem to go together, in which there is no wasted paper, whose lines are visually pleasing.
Page: 43
Chapter: 3

Name: Elephant head
Page: 43, 44
Chapter: 3
Section: 1

Question: What's the price of adding small details to a part of the origami ?
Answer: You should add detail to other parts. Otherwise, it seems this part is neglected
Page: 43
Chapter: 3
Section: 1

Smaller0: more long points a model has
Greater0: more complex the folding sequence must be
Page: 48
Chapter: 3
Greater1: smaller the result is

Name: Technical fold
Definition: A fold whose underlying structure shows clear evidence of intentional design
Page: 48
Chapter: 3
Example: fairly complex and detailed, encompassing insects, crustaceans, and other point-ridden
animals
Name2: origami sekkei

Name: Bird base
Page: 50
Chapter: 3
Index: 8

Name: flap
Definition: a region of paper that can be manipulated relatively independently of other parts of the model
Page: 31
Chapter: 2
Context: Origami
French: rabat

Question: Which is more permanent, pleat or crimp ?
Answer: crimp
Page: 31
Chapter: 2

Smaller0: crimp
Greater0: pleat
Page: 31
Chapter: 2
Smaller to greater: is more permament than
Greater to smaller: is less permanent than

Question: The design of an origami model may be broken down into
Answer: forming the base
Page: 53
Chapter: 4
Answer2: forming the details

Name: A base
Definition: a regular geometric shape that has a structure similar to that of the subject
Page: 53, 54
Chapter: 4
Context: Origami
Definition2: a geometric form with the same general shape and/or number of flaps as the desired subject.
Intuition: Each modification affect most of the paper

Name: Detail folds
Definition: Folds that transform the appearance of the base into the final model
Page: 53
Chapter: 4
Context: Origami
Intuition: Each modification are local