AI for Game Developers by David M. Bourg

By David M. Bourg

Advances in 3D visualization and physics-based simulation know-how make sure that online game builders to create compelling, visually immersive gaming environments that have been merely dreamed of years in the past. yet contemporary online game avid gamers have grown in sophistication in addition to the video games they play. it really is now not sufficient to wow your avid gamers with stunning pictures; your next step in growing much more immersive video games is more desirable man made intelligence, or AI.

Fortunately, complex AI video game thoughts are in the take hold of of each online game developer--not simply those that commit their careers to AI. if you are new to online game programming or if you are an skilled online game programmer who must wake up to velocity fast on AI strategies, you will find AI for video game builders to be the fitting place to begin for realizing and utilizing AI strategies for your video games.

Written for the amateur AI programmer, AI for video game builders introduces you to ideas resembling finite country machines, fuzzy good judgment, neural networks, and so forth, in common, easy-to-understand language, supported with code samples in the course of the complete e-book (written in C/C++). From uncomplicated innovations akin to chasing and evading, development move, and flocking to genetic algorithms, the publication offers a mixture of deterministic (traditional) and non-deterministic (newer) AI concepts aimed squarely at rookies AI builders. different subject matters coated within the e-book contain: capability functionality dependent pursuits: a strategy that handles chasing, evading swarming, and collision avoidance at the same time uncomplicated pathfinding and waypoints, together with a complete bankruptcy dedicated to the A* pathfinding set of rules AI scripting Rule-based AI: know about versions except fuzzy common sense and finite country machines simple chance Bayesian suggestions not like different books at the topic, AI for video game builders does not try and conceal each point of video game AI, yet to give you usable, complicated suggestions you could practice for your video games instantly. If you may have desired to use AI to expand the play-life of your video games, lead them to extra demanding, and most significantly, cause them to extra enjoyable, then this booklet is for you.

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AI for Game Developers All Online Books Table of Contents View as Frames Chapter 2. Chasing and Evading In this chapter we focus on the ubiquitous problem of chasing and evading. Whether you're developing a spaceship shooter, a strategy simulation, or a role-playing game, chances are you will be faced with trying to make your game's nonplayer characters either chase down or run from your player character. In an action or arcade game the situation might involve having enemy spaceships track and engage the player's ship.

Figure 2-1. Basic tile-based chase As you can see, the troll first moves diagonally toward the player until one of the coordinates, the horizontal in [*] this case, equals that of the player's. Then the troll advances toward the player straight along the other coordinate axis, the vertical in this case. Clearly this does not look very natural. A better approach is to have the troll move directly toward the player in a straight line. You can implement such an algorithm without too much difficulty, as we discuss in the next section.

The local y-axis fixed to the predator points in the positive direction from the back to the front of the vehiclethat is, the vehicle always heads along the positive local y-axis. So, if the x-position of the prey, in terms of the predator's local coordinate system, is negative, the prey is somewhere to the starboard side of the predator and the port steering force should be activated to correct the predator's heading so that it again points directly toward the prey. Similarly, if the prey's x-coordinate is positive, it is somewhere on the port side of the predator and the starboard steering force should be activated to correct the predator's heading.

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