Uses of 3D – How is 3D used by the interactive media and computer gamesindustries?Basic principles – How are 3D models displayed and constructed?There are Three popular ways to represent a model: 1. Polygonal modeling - Points in 3D space, called vertices, are connected by line segments to form a polygonal mesh. The vast majority of 3D models today are built as textured polygonal models, because they are flexible and because computers can render them so quickly. However, polygons are planar and can only approximate curved surfaces using many polygons. 2. Curve modeling - Surfaces are defined by curves, which are influenced by weighted control points. The curve follows (but does not necessarily interpolate) the points. Increasing the weight for a point will pull the curve closer to that point. Curve types include Nonuniform rational B-spline (NURBS), Splines, Patches and geometric primitives 3. Digital sculpting - Still a fairly new method of modeling, 3D sculpting has become very popular in the few short years it has been around. There are currently 3 types of digital sculpting: Displacement, which is the most widely used among applications at this moment, volumetric and dynamic tessellation. Displacement uses a dense model (often generated by Subdivision surfaces of a polygon control mesh) and stores new locations for the vertex positions through use of a 32bit image map that stores the adjusted locations. Volumetric which is based loosely on Voxels has similar capabilities as displacement but does not suffer from polygon stretching when there are not enough polygons in a region to achieve a deformation. Dynamic tesselation Is similar to Voxel but divides the surface using triangulation to maintain a smooth surface and allow finer details. These methods allow for very artistic exploration as the model will have a new topology created over it once the models form and possibly details have been sculpted. The new mesh will usually have the original high resolution mesh information transferred into displacement data or normal map data if for a game engine. 4. http://en.wikipedia.org/wiki/3D_modeling
5.3D development software – Examine the software tools used in the production of 3D models.Autodesk 3ds Max, formerly 3D Studio Max, is 3D computer graphics software for making3D animations, models, and images. It was developed and produced by Autodesk Media andEntertainment. It has modeling capabilities, a flexible plugin architecture and can be used onthe Microsoft Windows platform. It is frequently used by video game developers, TVcommercial studios and architectural visualization studios. It is also used for movie effectsand movie pre-visualization.In addition to its modeling and animation tools, the latest version of 3ds Max also featuresshaders (such as ambient occlusion and subsurface scattering), dynamic simulation, particlesystems, radiosity, normal map creation and rendering, global illumination, a customizableuser interface, and its own scripting language.http://en.wikipedia.org/wiki/Autodesk_3ds_MaxSketchUp is a 3D modeling program optimized for a broad range of applications such asarchitectural, civil, mechanical, film as well as video game design — and available in free aswell as professional versions.The program highlights its ease of use, and an online repository of model assemblies (e.g.,windows, doors, automobiles, entourage, etc.) known as 3D Warehouse enables designers tolocate, download, use and contribute free models. The program includes a drawing layoutfunctionality, allows surface rendering in variable "styles," accommodates third-party "plug-in" programs enabling other capabilities (e.g., near photo realistic rendering) and enablesplacement of its models within Google Earth.
In early 2012, Google, the previous owner of Sketchup, announced it will sell the program toTrimble, a company formerly known for GPS location serviceshttp://en.wikipedia.org/wiki/SketchUpLightWave is a software package used for rendering 3D images, both animated and static. Itincludes a rendering engine that supports such advanced features as realistic reflection andrefraction, radiosity, and caustics. The 3D modeling component supports both polygonmodeling and subdivision surfaces. The animation component has features such as reverseand forward kinematics for character animation, particle systems and dynamics. Programmerscan expand LightWaves capabilities using an included SDK which offers LScript scripting (aproprietary scripting language) and common C language interfaces.http://en.wikipedia.org/wiki/LightWave_3DBlender is a free and open-source 3D computer graphics software product used for creatinganimated films, visual effects, interactive 3D applications or video games. Blenders featuresinclude 3D modeling, UV unwrapping, texturing, rigging and skinning, fluid and smokesimulation, particle simulation, animating,match moving, camera tracking, rendering, videoediting and compositing. It also features a built-in game engine.http://en.wikipedia.org/wiki/Blender_(software)