..
  This file was automatically converted from MediaWiki syntax.
  If some markup is wrong, looks weird or doesn't make sense, feel free
  to fix it.

  Please remove this comment once this file was manually checked
  and no "strange ReST" artifacts remain.

.. _seek:

Seek
====

'Seek' is a behavior where an AICharacter moves in the direction of a target
NodePath or position until it reaches that entity.

Video of this behavior in Panda3D :

{{#ev:youtube\|-UMeYgZLa8Q}}

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

In PandAI, seek is defined as :


.. code-block:: python
    
    aiBehaviors.seek(NodePath target, float priority)
    aiBehaviors.seek(Vec3 position, float priority)

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 seeks is determined when you first
create your AICharacter object using the AICharacter constructor.

-  Note : Seek's direction is calculated only during the first instance of the
   call and so is more efficient than pursue, if all you want is an object to
   go to a point.

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

Here is a full program written implementing 'seek' using PandAI :


.. 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 *
    
    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(-10, 0, 0)
            self.seeker = Actor("models/ralph",
                                     {"run":"models/ralph-run"})
            self.seeker.reparentTo(render)
            self.seeker.setScale(0.5)
            self.seeker.setPos(ralphStartPos)
            # Target
            self.target = loader.loadModel("models/arrow")
            self.target.setColor(1,0,0)
            self.target.setPos(5,0,0)
            self.target.setScale(1)
            self.target.reparentTo(render)
          
        def setAI(self):
            #Creating AI World
            self.AIworld = AIWorld(render)
     
            self.AIchar = AICharacter("seeker",self.seeker, 100, 0.05, 5)
            self.AIworld.addAiChar(self.AIchar)
            self.AIbehaviors = self.AIchar.getAiBehaviors()
            
            self.AIbehaviors.seek(self.target)
            self.seeker.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()
    



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

-  Note: To get the full working demo for this, please visit :

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