ai_escortpatrol Class Reference

Inheritance diagram for ai_escortpatrol:

Public Member Functions
def	init
def	Execute

Data Fields
	timer
	target
	thrustfactor

Detailed Description

Definition at line 22 of file ai_escortpatrol.py.

Member Function Documentation

def Execute

(

self)

Definition at line 35 of file ai_escortpatrol.py.

References Vector.Cross(), unit.facingAngleToUnit(), unit.getSignedVelocity(), sre_parse.max, Vector.SafeNorm(), Vector.Sub(), ai_escortpatrol.target, ai_escortpatrol.thrustfactor, ai_escortpatrol.timer, and vsrandom.uniform().

    def Execute(self):
        import unit
        import Vector
        import vsrandom
        VS.PythonAI.Execute(self);
        distance = abs(self.GetParent().getDistance(self.target))

        # evade the target and almost parallel flyby
        if (distance<=2000 and VS.GetGameTime()>self.timer):
            angle = unit.facingAngleToUnit(self.GetParent(),self.target)
            velocity = unit.getSignedVelocity(self.GetParent())
            if (angle<0.30):
                angular = 0.80-angle
                change  = (vsrandom.uniform(-angular,angular),
                            vsrandom.uniform(angular,angular),
                            vsrandom.uniform(-angular,angular))
                self.GetParent().SetAngularVelocity(change)
            if (velocity<100):
                self.GetParent().LongitudinalThrust(100)
            self.timer = VS.GetGameTime()+1

        # patrol in random direction
        if (distance>2000 and distance<7000 and VS.GetGameTime()>self.timer):
            angular = vsrandom.uniform(0.01,0.10)
            change  = (vsrandom.uniform(-angular,angular),
                        vsrandom.uniform(angular,angular),
                        vsrandom.uniform(-angular,angular))
            self.GetParent().SetAngularVelocity(change)
            velocity = unit.getSignedVelocity(self.GetParent())
            if (velocity<100):
                self.GetParent().LongitudinalThrust(200)
            self.timer = VS.GetGameTime()+2

        # return to target proximity
        if (distance>=7000 and VS.GetGameTime()>self.timer):
            # calculates the angular velocity required to turn back on target
            vec = Vector.Sub(self.GetParent().Position(),self.target.Position())
            change = Vector.Cross(Vector.SafeNorm(self.GetParent().GetOrientation()[2]),Vector.SafeNorm(vec))
            self.GetParent().SetAngularVelocity(change)
            # calculate the required thrust depending on mass and 
            # signed velocity magnitude as result of momentum
            velocity = unit.getSignedVelocity(self.GetParent())
            if (velocity<100):
                if (velocity<0):
                    # thrust more while not flying forward
                    thrust = self.thrustfactor * max(abs(velocity),300)
                else:
                    thrust = self.thrustfactor * 300
                self.GetParent().LongitudinalThrust(thrust)
            self.timer = VS.GetGameTime()+1
        return 1