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The LOD-ing algorithm reduces the geometrical complexity of a 3D object the further it is from the viewer and returns that lost complexity as the viewer gets closer to the 3D object, causing it to pop as it becomes suddenly more detailed. The LOD-ing algorithms can depend on more factors than just distance from the viewer, but it is often the ...
Hidden-surface algorithms can be used for hidden-line removal, but not the other way around. Reif and Sen [ 17 ] proposed an O (log 4 n )-time algorithm for the hidden-surface problem, using O (( n + v )/log n ) CREW PRAM processors for a restricted model of polyhedral terrains, where v is the output size.
The objects in 3-D computer graphics are often referred to as 3-D models. Unlike the rendered image, a model's data is contained within a graphical data file. A 3-D model is a mathematical representation of any three-dimensional object; a model is not technically a graphic until it is displayed.
A hidden-surface determination algorithm is a solution to the visibility problem, which was one of the first major problems in the field of 3D computer graphics. [ citation needed ] The process of hidden-surface determination is sometimes called hiding , and such an algorithm is sometimes called a hider .
2D Computer Aided Design, 3D Modeling, Basic Rendering, Rudimentary Animation (of Camera, not objects) Proprietary: Blender: 2024-08-20 v 4.2.1 [1] [2] Blender Foundation: Microsoft Windows, macOS, Linux, BSD, Solaris, AmigaOS 4, MorphOS
In principle, any 2D vector graphics renderer can be used to render 3D objects by first projecting them onto a 2D image plane. [27]: 93, 431, 505, 553 3D rasterization Adapts 2D rasterization algorithms so they can be used more efficiently for 3D rendering, handling hidden surface removal via scanline or z-buffer techniques. Different realistic ...
However, this is not always possible. A virtual hand that can select and re-locate virtual objects will work as well. 3D widgets can be used to put controls on objects: these are usually called 3D Gizmos or Manipulators (a good example are the ones from Blender). Users can employ these to re-locate, re-scale or re-orient an object (Translate ...
The process makes rendering objects quicker and more efficient by reducing the number of polygons for the program to draw. For example, in a city street scene, there is generally no need to draw the polygons on the sides of the buildings facing away from the camera; they are completely occluded by the sides facing the camera.