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Download PDF by David Young: Learning Game AI Programming with Lua

By David Young

ISBN-10: 1783281340

ISBN-13: 9781783281343

Online game AI could be simply damaged up right into a variety of elements corresponding to choice making, animation dealing with, and strategies, however the stability and interplay among each one procedure moves a stability among stable AI and undesirable AI.

Beginning with an creation to the AI sandbox, each one new point of video game AI is brought, carried out, after which extended upon. Going ahead, you are going to discover ways to make the most of open resource libraries akin to Ogre3D, Bullet Physics, OpenSteer, Recast, Detour, and Lua to create an AI sandbox with a complete codebase on hand to extend and step through.

This is completed via a step by step method, from studying to maneuver easy shapes to totally animating your squaddies. through the top of the booklet, your AI might be in a position to navigate, pathfind, deal with animation playback, speak, and understand their atmosphere.

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Next, the agent itself is pushed as the only parameter to the Agent_Initialize function. cpp void AgentUtilities::Initialize(Agent* const agent) { // Retrieves the lua virtual machine the agent script is // running on. lua_State* luaVM = agent->GetLuaVM(); lua_getglobal(luaVM, "Agent_Initialize"); // Agent_Initialize accepts one parameter, an Agent. [ 23 ] Getting Started with AI Sandbox AgentUtilities::PushAgent(luaVM, agent); // Execute the Agent_Initialize function and check for // success. = 0) { assert(false); } } Lua calling C/C++ functions Exposing C++ functions to Lua takes place through a process called function binding.

Once the code has finished executing, any return values are pushed back to the stack for the executing Lua script to handle. The Lua call stack indexing scheme [ 20 ] Chapter 1 When interfacing with Lua, stack values can either be retrieved bottom-up, or top-down. The top element in the stack can be retrieved with an index of -1, while the bottom element of the stack can be retrieved with an index of 1. Additional elements can be retrieved by indexing -2, -3, 2, 3, and so on. Lua differs from most programming languages by index values beginning from 1 instead of 0.

Additional elements can be retrieved by indexing -2, -3, 2, 3, and so on. Lua differs from most programming languages by index values beginning from 1 instead of 0. Lua primitives Lua has 8 basic primitives: nil, Boolean, number, string, function, userdata, thread, and table: • Nil: Here, a value corresponds to a null value in C. • Boolean: Here, values are equivalent to their C++ counterparts and represent either true or false. • Number: This internally represent doubles that Lua uses to store integers, longs, floats, and doubles.

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Learning Game AI Programming with Lua by David Young


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