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Unity AI Programming Essentials by Dan Violet Sagmiller, Curtis Bennett

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React AI

Different Methods' React, a $45 AI, introduces a behavior tree and the use of a navigation mesh, or NavMesh. A NavMesh is a series of interconnected polygons forming a complex area used for travel. It creates a simplified graph of the level that is inputted into the pathfinding system. This simplified graph that it creates is smoother and tends to have characters that travel better than a grid-based graph. A behavior tree is a parent-child structure used for making decisions in many AIs. We will look at behavior trees and navigation meshes in more detail in the later chapters. NavMesh is a basic feature available in Unity, but the behavior tree is not. Unlike the other two AIs shown, this AI requires a bit more coding to get started, ...

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