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Learning Game AI Programming with Lua

You're reading from  Learning Game AI Programming with Lua

Product type Book
Published in Nov 2014
Publisher Packt
ISBN-13 9781783281336
Pages 352 pages
Edition 1st Edition
Languages
Author (1):
David Young David Young
Profile icon David Young

Table of Contents (16) Chapters

Learning Game AI Programming with Lua
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
1. Getting Started with AI Sandbox 2. Creating and Moving Agents 3. Character Animations 4. Mind Body Control 5. Navigation 6. Decision Making 7. Knowledge Representation 8. Perception 9. Tactics Index

Avoiding blocks and agents


Modifying the SeekingAgent.lua script by adding the weighted sum of the ForceToAvoidAgents and ForceToAvoidObjects functions allows for the seeking agent to avoid potential collisions. When running the sandbox, try shooting boxes in the path of the agent and watch it navigate around the boxes:

SeekingAgent.lua

function Agent_Update(agent, deltaTimeInMillis)
    local destination = agent:GetTarget();
    local deltaTimeInSeconds = deltaTimeInMillis / 1000;
    local avoidAgentForce = agent:ForceToAvoidAgents(1.5);
    local avoidObjectForce = agent:ForceToAvoidObjects(1.5);
    local seekForce = agent:ForceToPosition(destination);
    local targetRadius = agent:GetTargetRadius();
    local radius = agent:GetRadius();
    local position = agent:GetPosition();
    local avoidanceMultiplier = 3;

    -- Sum all forces and apply higher priority to avoidance 
    -- forces.
    local steeringForces =
        seekForce +
        avoidAgentForce * avoidanceMultiplier ...
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