Friday, 7 October 2016

UV Mapping, Texturing, Rigging and Animation

UV mapping is the process of applying a 2D image to a 3D object or mesh. Where X, Y and Z apply to the axes of a 3D shape, U and V refer to the 2D axes. Essentially, a UV map is what the image or texture is applied to, to be able to wrap onto the 3D shape.


Textures and shaders are what makes the object not only visible, but appear three dimensional. They are what determines the visual appearance of your object, regardless of its shape. A shader is “…a set of instructions applied to a 3D model that lets the computer know how it should be displayed”, and textures “…are two-dimensional image files that can be mapped onto the model's 3D surface through a process known as texture mapping” (About Tech, 2016).


Rigging is used in the animation process to give movement to a character. It is the application of a ‘skeleton’ to the 3D mesh which has its own bones and joints, all which can be used to manipulate movement in the object. Rigging a character for a full feature animation can take days, even weeks.


Animation is “…the process of displaying still images in a rapid sequence to create the illusion of movement” (Wise Geek, n.d.). The three main types of animation are traditional, stop motion, and computer generated. A traditional animation is a very time consuming process. Each frame is drawn by hand, scanned, and then edited digitally. In stop motion, a physical object is photographed one movement at a time, after which the photographs are digitally pieced together to make a full motion. Computer generated animation involves the creation (and rigging) of a digital 3D character, which is modelled according to the required movements, and once again, pieced together to form the full motion. 


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References

About Tech (August, 2016). 3D model components - vertices, edges, polygons & more. Retrieved from 
         http://3d.about.com/od/3d-101-The-Basics/a/Anatomy-Of-A-3d-Model.htm

Wise Geek (n.d.). What is animation? Retrieved from
         http://www.wisegeek.org/what-is-animation.htm