![]() ![]() The observer's position is shown as the red dot, the arrow points to the viewing direction, r denotes vision distance and θ is half the angle of view. Both these operations should be performed in a way efficient enough to use it in real-time rendering scenarios. line of sight ( LOS) queries on a given point should be serviced. Additionally, given a point in the world, we should be able to quickly tell if this point is visible to the observer i.e. ![]() ![]() With no obstacles it would be a sector, made of two edges (radii) and a connecting arc see figure 1. the field of view ( FoV) is to be determined. Given the observer's vision parameters - viewing direction, vision distance or the reach of sight and the angle of vision - we have to find the region visible to the observer i.e. ![]()
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