What is the level of detail?
Detail level in computer graphics indicates the process of simplifying various graphic aspects of a three -dimensional (3D) object that is rendered at a distance. The purpose of implementing the level of details is, so the rendering rate can be increased if there are more objects in the virtual scene and some of them are so far from the viewer that foreign details are not as visible. Depending on the exact way of integrated the level of detail into the program, it can be one of two types: discrete or continuous. Discreet boat replaces 3D models or textures with separate, usually premade models that have less detail. Continuous Lod uses algorithms to dynamic increase or reduce the details on the model as needed. If properly implemented, it is almost imperceptible to the viewer. When the calculated distance between the object in the virtual scene and the viewer's location is above a certain number, the level of details can be reduced. This reduction usually leads either the fewer polygons that make up3D object, reduced images of quality texture or combination of both. The speed rendering speed that uses the detail level is significantly faster than the speed rendering rate where objects are consistently in full detail.
The discrete level of detail is a method that uses a set number of distances to determine which model of the object will be rendered. Various 3D quality levels can be created either in the modeling program or calculated when the program starts and then saves for later use. This method works well because it is simple and fast. Some programmers and artists are also not preferred, because sometimes the jump from one model of the boat to another may seem too obvious and cause to find out suddenly and in more detail in front of the viewer.
continuous level of detail actually uses algorithms to make polygons form an object, and either divide them for larger details notBo consolidate faces for less detail. This version of the boat allows a smooth transition from one pixel to full detail as soon as the distance is reduced. However, algorithms can sometimes be a very intense processor and also have the opportunity to bring undesirable results, such as missing polygon faces or changes in 3D models that distort initial geometry.
Other variations of ships include a reduction in image quality mapped images for texture mapping, instead using very low quality, or even using a full color without texture mapping to approach the appearance from a distance. In another method, instead of loading a 3D model with reduced quality for LOD purposes, it is replaced by a geometric primitive such as Sphere or a rectangle that makes much faster than any polygons. There are other algorithms that can be used for more specific types of ship calculations such as those that are needed to modify off -road networks and those that can be used for approximate objects that move fast in cellsthe scene.