Decision Making - Learning Game AI Programming with Lua - page 344

The flee action

To create a flee action that causes our agent to run away from its enemy, we need to first
find a valid path that is at least 4.0 meters away. Picking an arbitrary point on the navmesh
will work, but we must ensure that there is a valid path to that point from the agent's cur-
rent position:

SoldierActions.lua :

function SoldierActions_FleeCleanUp(userData)
-- No cleanup is required for fleeing.

end

function SoldierActions_FleeInitialize(userData)
local sandbox = userData.agent:GetSandbox();

if (userData.enemy) then
local endPoint = Sandbox.RandomPoint(sandbox,
"default");
local path = Sandbox.FindPath(
sandbox,
"default",
userData.agent:GetPosition(),
endPoint);

-- Find a valid position at least 16 units away from

the

-- current enemy.
-- Note: Since pathfinding is not affected by the

enemy,

-- it is entirely possible to generate paths that

move the

-- Agent into the enemy, instead of away from the

enemy.

while #path == 0 do
endPoint = Sandbox.RandomPoint(sandbox,

"default");

while Vector.DistanceSquared(endPoint,