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Computer simulation has three meanings: simulating abstract models, creating 3D graphics models, and reproducing the functions of one system on another. Computer models are used in various fields, classified by four variables. 3D models can be formed using primitive shapes or NURBS, spline and patch modeling, or polygon modeling. Emulation allows one device to mimic another for ease of use.
Computer simulation has three meanings. Computer simulation can refer to a computer program that simulates an abstract model so that it can be studied and analyzed. It can also refer to a 3D computer graphics model made to represent a three-dimensional object through the use of specialized software. Finally, computer simulation can refer to the practice called emulation in which the functions of one particular system are reproduced on a second system.
A computer model, also known as a computational model, is a computer simulation used extensively in the sciences and social sciences as an extension of mathematical modeling. A computer simulation of this type creates a sampling of representative outcomes or sequences of events in situations where reproducing all possible consequences of the model is prohibitively expensive and the models may be more or less abstract. Computer models are used in biology, chemistry and physics as well as in economics and psychology. The typology of computer models classifies them according to a set of four variables. Are they stochastic or deterministic? stationary or dynamic? continuous or discrete? local or distributed?
Computer simulations in the form of 3D models are used in healthcare, science, architecture, and most commonly in movies, computer games, and video games. Most 3D models take one of two approaches. On the one hand, they can show an object as a solid, defining it by its volume. The alternative is to show the edge or shell of an object. This is the predominant model for games and movies.
3D models can be formed in different ways. Like some books for learning to draw, they can be based entirely on very simple geometric shapes. While sketchbooks use circles, squares, triangles and other 2D models, computer modeling will use balls, cubes and pyramids, for example. This style of modeling is called primitive because it is limited to the use of primitive or fundamental shapes.
There are three other types of model training. One is NURBS (Nonuniform Rational B-spline), which was created by two engineers who worked for French automakers, Pierre Bézier and Paul de Casteljau. Bézier’s decision to publish his work has led to his name becoming closely associated with curves. NURBS are used in computer aided design (CAD) programs, as well as programs for manufacturing, engineering, and animation.
Spline and patch modeling is similar to NURBS, with the surface defined by curved lines. Polygon modeling forms a polygon mesh using line segments to connect vertices. They are used in many 3D models, but can only approximate curved surfaces, since every polygon is planar.
The type of computer simulation known as emulation can allow one device to mimic another. This is useful, for example, in the case where a particular brand of computer peripherals has a dominant position in the market and peripherals from other brands can emulate the dominant device for ease of use. Software emulators to run Apple software on other platforms and Windows software on Apple Macintosh computers are another use for this type of modeling.
