Creating and Moving Agents - Learning Game AI Programming with Lua - page 100

agent, seekForce, deltaTimeInSeconds);
AgentUtilities_ClampHorizontalSpeed(agent);

local targetRadiusSquared =
(targetRadius + radius) * (targetRadius + radius);

-- Calculate the position where the Agent touches the
ground.
local adjustedPosition =
agent:GetPosition() -
Vector.new(0, agent:GetHeight()/2, 0);

-- If the agent is within the target radius pick a new
-- random position to move to.
if (Vector.DistanceSquared(adjustedPosition,
destination) <
targetRadiusSquared) then

-- New target is within the 100 meter squared

movement

-- space.
local target = agent:GetTarget();
target.x = math.random(-50, 50);
target.z = math.random(-50, 50);

agent:SetTarget(target);

end

-- Draw debug information for target and target radius.
Core.DrawCircle(
destination, targetRadius, Vector.new(1, 0, 0));
Core.DrawLine(position, destination, Vector.new(0, 1,

0));

-- Debug outline representing the space the Agent can

move

-- within.
Core.DrawSquare(Vector.new(), 100, Vector.new(1, 0, 0));

end