leokruto.blogg.se - Line of sight game

However, technically vision is blocked by walls i.e. When describing a world in 2D, buildings naturally map to polygons and are thus taken as input by the algorithm. Note: The convention used through out is lower case letters for scalars and uppercase letters for vector values.

Set of polygons includes the world boundary.

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.