Wire-frame model
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A wire-frame model, also wireframe model, is a visual representation of a
Using a wire-frame model allows for the visualization of the underlying design structure of a 3D model. Traditional two-dimensional views and drawings/renderings can be created by the appropriate rotation of the object, and the selection of
Since wire-frame renderings are relatively simple and fast to calculate, they are often used in cases where a relatively high screen
The wire frame format is also well-suited and widely used in programming
Hand-drawn wire-frame-like illustrations date back as far as the Italian Renaissance.[2] Wire-frame models were also used extensively in video games to represent 3D objects during the 1980s and early 1990s, when "properly" filled 3D objects would have been too complex to calculate and draw with the computers of the time. Wire-frame models are also used as the input for computer-aided manufacturing (CAM).
There are three main types of 3D computer-aided design (CAD) models; wire frame is the most abstract and least realistic. The other types are surface and solid. The wire-frame method of modelling consists of only lines and curves that connect the points or vertices and thereby define the edges of an object.
Simple example of wireframe model
An object is specified by two tables: (1) Vertex Table, and, (2) Edge Table.
The vertex table consists of three-dimensional coordinate values for each vertex with reference to the origin.
Vertex | X | Y | Z |
---|---|---|---|
1 | 1 | 1 | 1 |
2 | 1 | -1 | 1 |
3 | -1 | -1 | 1 |
4 | -1 | 1 | 1 |
5 | 1 | 1 | -1 |
6 | 1 | -1 | -1 |
7 | -1 | -1 | -1 |
8 | -1 | 1 | -1 |
Edge table specifies the start and end vertices for each edge.
Edge | Start Vertex | End Vertex |
---|---|---|
1 | 1 | 2 |
2 | 2 | 3 |
3 | 3 | 4 |
4 | 4 | 1 |
5 | 5 | 6 |
6 | 6 | 7 |
7 | 7 | 8 |
8 | 8 | 5 |
9 | 1 | 5 |
10 | 2 | 6 |
11 | 3 | 7 |
12 | 4 | 8 |
A naive interpretation could create a wire-frame representation by simply drawing straight lines between the screen coordinates of the appropriate vertices using the edge list.
Unlike representations designed for more detailed rendering, face information is not specified (it must be calculated if required for solid rendering).
Appropriate calculations have to be performed to
See also
- Animation
- 3D computer graphics
- Computer animation
- Computer-generated imagery (CGI)
- Mockup
- Polygon mesh
- Vector graphics
- Virtual cinematography
References
- ^ "Wireframe Renders of 3D Models - CG Elves". 26 December 2015.
- ^ Nasifoglu, Yelda (7 November 2012). "Renaissance wireframe". Architectural Intentions from Vitruvius to the Renaissance Studio Project for ARCH 531. McGill University. Retrieved 11 March 2013.
- Principles of Engineering Graphics by Maxwell Macmillan International Editions
- ASME Engineer's Data Book by Clifford Matthews
- Engineering Drawing by N.D. Bhatt
- Texturing and Modeling by Davis S. Ebert
- 3D Computer Graphics by Alan Watt