Games include models of people, monsters, cars and so forth. These models are almost universally created using a third party tool. Models normally consist of a polygon mesh that specifies the structure of the model, textures which are layered over the polygon mesh and animations. Animations specify standard motions that the object can perform, such as laughing, waving, running and so forth. In theory, it is possible to specify models and their animations directly in Ogre, but this would be so time-consuming that people use third party modeling tools instead. Modeling tools use proprietary formats for the models they generate. However, many tools provide a plug-in capability, allowing them to be extended to provide output in the format that Ogre expects. Drawing/painting tools are used to create textures for models and landscapes. Textures are simply bitmap images that are stretched over polygon meshes to make them look realistic. Worlds normally consist of exterior terrain populated with entities (trees, houses, monsters, etc.), water, sky and light sources. Very broadly speaking, there are two problems in creating worlds: creating the terrain, and populating the terrain with all those other things (entities, water, sky, light sources.) World design tools help to solve these problems. Some tools deal exclusively with terrain generation, while others help with laying out the scene. Using exporters available for the following programs allows for export to a scene format known as DotScene. This can be efficiently optimized using the DotSceneOctree scene manager, and lends itself well to large outdoor areas. The term level is normally used to describe the interiors of building, dungeons or industrial complexes in which many games take place. Levels are different from exteriors in that they typically consist of regular geometry (hallways, staircases, etc.) rather than terrain. Level design tools typically allow the definition of the level's geometry as well as the placement of entities (furniture, monsters, etc.) and light sources. While levels can be displayed in any scene manager, Ogre provides the BSP scene manager which employs BSP culling and collision management to render levels efficiently. This scene manager is no longer subject to legal restrictions since the release of GTKRadiant and q3map2 under the GNU GPL by id Software. BSP levels are generated from Quake .map files, created via a map editor. By default, all search terms are optional. It behaves like an OR logic. Objects that contain the more terms are rated higher in the results and will appear first in their type. For example, wiki forum will find: Add a plus sign ( + ) before a term to indicate that the term must appear in results. Example: +wiki forum will find objects containing at least wiki. Objects with both terms and many occurences of the terms will appear first. Add a minus sign ( - ) before a term to indicate that the term must not appear in the results. To reduce a term's value without completely excluding it, use a tilde. Example: -wiki forum will find objects that do not contain wiki but contain forum Use parenthesis ( ) to group terms into subexpressions. Example: +wiki +(forum blog) will find objects that contain wiki and forum or that contain wiki and blog in any order. Use double quotes ( ' ' ) around a phrase to find terms in the exact order, exactly as typed. Example: 'Alex Bell' will not find Bell Alex or Alex G. Bell. Add an asterisk ( * ) after a term to find objects that include the root word. For example, run* will find: Add a tilde ( ~ ) before a term to reduce its value indicate to the ranking of the results. Objects that contain the term will appear lower than other objects (unlike the minus sign which will completely exclude a term). Example: +wiki ~forum will rate an object with only wiki higher that an object with wiki and forum. Add a less than ( <, ) or greater than ( >, ) sign before a term to change the term's contribution to the overall relevance value assigned to a object. Example: +wiki +(>,forum <, blog) will find objects that contain wiki and forum or wiki and blog in any order. wiki forum will be rated higher. Source.


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Last Modified: April 23, 2016 @ 10:08 am