The AI Systems of Left 4 Dead - Valve

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Goal: Deliver Robust Behavior Performances ‣ Path Optimization vs Reactive Path Following • Resultant path is reasonably close to optimized path • Reactive Path Following is used for all actors in Left 4 Dead
Goal: Deliver Robust Behavior Performances ‣ Reactive Path Following: Climbing • To ensure the Common Infected horde are always dangerous, they have the ability to rapidly climb • Climbing is algorithmic, using a similar technique to local obstacle avoidance • Algorithmic climbing solves two major issues • Navigating the complex geometry of the post apocalyptic world of Left 4 Dead • Navigating over movable physics props
Page 1 and 2: The AI Systems of Left 4 Dead Micha
Page 3 and 4: Left 4 Dead: The Survivor Team
Page 5 and 6: Left 4 Dead: The Special Infected
Page 7 and 8: Left 4 Dead
Page 9 and 10: Left 4 Dead
Page 11 and 12: Goals of Left 4 Dead AI ‣ Deliver
Page 13 and 14: Goal: Deliver Robust Behavior Perfo
Page 27: Goal: Deliver Robust Behavior Perfo
Page 47 and 48: Goal: Provide Competent Human Playe
Page 49 and 50: Goal: Provide Competent Human Playe
Page 53 and 54: Goal: Promote Replayability ‣ In
Page 55 and 56: Goal: Promote Replayability Procedu
Page 57 and 58: ‣ The Navigation Mesh • Represe
Page 61 and 62: ‣ The Active Area Set Goal: Promo
Page 63 and 64: ‣ The Active Area Set Goal: Promo
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Goal: Generate dramatic game pacing
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‣ Just the beginning… • Expan
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THANK YOU!
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The AI Systems of Left 4 Dead - Valve

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