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You're tasked with implementing a crowd that walks around the streets of a city. Describe some ways you could implement this in a fast and efficient manner. How do you ensure that crowd members don't touch each other while moving? How do you get crowd members to get out of each others way, and ensure that no two crowd members can get stuck trying to get around each other?
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Answer Posted / Priyanka Bhardwaj
To efficiently implement a crowd, consider using navigation meshes or pathfinding grids. Navigation meshes divide the environment into walkable and impassable areas, allowing for faster movement calculations. To avoid collisions between crowd members, use spatial partitioning techniques such as quadtrees or octrees to quickly identify potential collisions. When two crowd members are about to collide, move them away from each other by adjusting their paths slightly so that they can pass without touching. To prevent crowd members from getting stuck while trying to get around each other, implement a steering behavior known as 'avoidance'. This behavior encourages crowd members to find an alternative path when obstacles are encountered.
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