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.. _wander:

Wander
======

'Wander' is an AI behavior where an AICharacter will move in a random
direction to generate realistic movement around an environment with no goal
position in mind.

{{#ev:youtube\|jy6F6HnenoE}}

In PandAI, 'Wander' is defined as :


.. code-block:: python
    
    aiBehaviors.wander(double wander_radius, int flag, double aoe, float priority)



where :

Wander Radius represents the degree of wandering. This is implemented via a
guiding circle in front of the AI Character.

Flag represents which plane to wander in (0 - XY, 1 - YZ, 2 - XZ, 3 - XYZ). By
default, it is in the XY plane.

Area of Effect is the radius from the starting point where the AICharacter
would wander within.

priority is by default set to 1.0 and is used when using two or more steering
behaviors on an AICharacter.

--------------

The velocity at which the AICharacter wanders is determined when you first
create your AICharacter object using the AICharacter constructor.

--------------

The full working code for this in Panda3D :



.. code-block:: python
    
    import direct.directbase.DirectStart
    from panda3d.core import *
    from direct.showbase.DirectObject import DirectObject
    from direct.task import Task
    from direct.actor.Actor import Actor
    #for Pandai
    from panda3d.ai import *
    
    # Globals
    speed = 0.75
    
    class World(DirectObject):
    
        def __init__(self):
            base.disableMouse()
            base.cam.setPosHpr(0,0,55,0,-90,0)
            
            self.loadModels()
            self.setAI()
    
        def loadModels(self):
            # Seeker
            ralphStartPos = Vec3(0, 0, 0)
            self.wanderer = Actor("models/ralph",
                                     {"run":"models/ralph-run"})
            self.wanderer.reparentTo(render)
            self.wanderer.setScale(0.5)
            self.wanderer.setPos(ralphStartPos)
          
        def setAI(self):
            #Creating AI World
            self.AIworld = AIWorld(render)
     
            self.AIchar = AICharacter("wanderer",self.wanderer, 100, 0.05, 5)
            self.AIworld.addAiChar(self.AIchar)
            self.AIbehaviors = self.AIchar.getAiBehaviors()
            
            self.AIbehaviors.wander(5, 0, 10, 1.0)
            self.wanderer.loop("run")
    
            #AI World update        
            taskMgr.add(self.AIUpdate,"AIUpdate")
            
        #to update the AIWorld    
        def AIUpdate(self,task):
            self.AIworld.update()            
            return Task.cont
     
    w = World()
    run()
    

To get the full working
demo, please visit :

https://sites.google.com/site/etcpandai/documentation/steering-behaviors/wander/PandAIWanderExample.zip?attredirects=0&d;=1