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2D geometric model

 

 
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2D geometric model
 
 
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A 2D geometric model is a geometric model of an object as two-dimensional figure, usually on the Euclidean or Cartesian plane.

Even though all material objects are three-dimensional, a 2D geometric model is often adequate for certain flat objects, such as paper cut-outs and machine parts made of sheet metal
Sheet metal

Sheet metal is simply metal formed into thin and flat pieces. It is one of the fundamental forms used in metalworking, and can be cut and bent into a variety of different shapes....
.

2D geometric models are also convenient for describing certain types of artificial image
Image

An image is an artifact, usually two-dimensional , that has a similar appearance to some subject —usually a physical object or a person....
s, such as technical diagram
Diagram

A diagram is a 2D geometric model symbolic representation of information according to some visualization technique. Sometimes, the technique uses a Three-dimensional space visualization which is then graphical projection onto the 2D surface....
s, logo
Logo

A logo is a graphical element that, together with its logotype form a trademark or commercial brand. Typically, a logo's design is for immediate recognition....
s, the glyph
Glyph

A glyph is an element of writing. Two or more glyphs representing the same symbol, whether interchangeable or context-dependent, are called allographs; the abstract unit they are variants of is called a grapheme or character ....
s of a font
Typeface

In typography, a typeface is a set of one or more fonts, in one or more sizes, designed with stylistic unity, each comprising a coordinated set of glyphs....
, etc.






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A 2D geometric model is a geometric model of an object as two-dimensional figure, usually on the Euclidean or Cartesian plane.

Even though all material objects are three-dimensional, a 2D geometric model is often adequate for certain flat objects, such as paper cut-outs and machine parts made of sheet metal
Sheet metal

Sheet metal is simply metal formed into thin and flat pieces. It is one of the fundamental forms used in metalworking, and can be cut and bent into a variety of different shapes....
.

2D geometric models are also convenient for describing certain types of artificial image
Image

An image is an artifact, usually two-dimensional , that has a similar appearance to some subject —usually a physical object or a person....
s, such as technical diagram
Diagram

A diagram is a 2D geometric model symbolic representation of information according to some visualization technique. Sometimes, the technique uses a Three-dimensional space visualization which is then graphical projection onto the 2D surface....
s, logo
Logo

A logo is a graphical element that, together with its logotype form a trademark or commercial brand. Typically, a logo's design is for immediate recognition....
s, the glyph
Glyph

A glyph is an element of writing. Two or more glyphs representing the same symbol, whether interchangeable or context-dependent, are called allographs; the abstract unit they are variants of is called a grapheme or character ....
s of a font
Typeface

In typography, a typeface is a set of one or more fonts, in one or more sizes, designed with stylistic unity, each comprising a coordinated set of glyphs....
, etc. They are an essential tool of 2D computer graphics
2D computer graphics

2D computer graphics is the computer-based generation of digital images—mostly from two-dimensional models and by techniques specific to them....
 and often used as components of 3D geometric models, e.g. to describe the decal
Decal

A decal or transfer is a plastic, cloth paper or ceramic substrate that has printed on it a pattern that can be moved to another surface upon contact, usually with the aid of heat or water....
s to be applied to a car
Automobile

An automobile or motor car is a wheeled motor vehicle for transportation passengers, which also carries its own car engine or motor. Most definitions of the term specify that automobiles are designed to run primarily on roads, to have seating for one to eight people, to typically have four wheels, and to be constructed principally f...
 model.

2D geometric modeling techniques


  • simple geometric shape
    Geometry

    Geometry arose as the field of knowledge dealing with spatial relationships. Geometry was one of the two fields of pre-modern mathematics, the other being the study of numbers....
    s
  • boundary representation
    Boundary representation

    In solid modeling and computer-aided design, boundary representation—often abbreviated as B-rep or BREP—is a method for representing shapes using the limits....
  • Boolean operation
    Boolean operation

    Boolean operation may refer to one of the following related meanings.*Boolean function*an operation in a Boolean algebra ; in particular:**operations over the algebra of sets: union , intersection , etc....
    s


See also


  • computational geometry
    Computational geometry

    Computational geometry is a branch of computer science devoted to the study of algorithms which can be stated in terms of geometry. Some purely geometrical problems arise out of the study of computational geometric algorithms, and such problems are also considered to be part of computational geometry....
  • digital image
    Digital image

    A digital image is a representation of a two-dimensional using ones and zeros . Depending on whether or not the is fixed, it may be of vector graphics or raster graphics type....