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.. _pusher-example:

Pusher Example
==============



.. only:: python

    Here is a short example that shows two small spheres using a
    ``CollisionHandlerPusher``:
    
    
    .. code-block:: python
        
        from direct.showbase.ShowBase import ShowBase
        from panda3d.core import CollisionTraverser, CollisionHandlerPusher
        from panda3d.core import CollisionNode, CollisionSphere
        from panda3d.core import Point3
        
        # Initialize the scene.
        ShowBase()
        
        # Initialize the collision traverser.
        base.cTrav = CollisionTraverser()
        
        # Initialize the Pusher collision handler.
        pusher = CollisionHandlerPusher()
        
        # Load a model.
        smiley = loader.loadModel('smiley')
        # Reparent the model to the camera so we can move it.
        smiley.reparentTo(camera)
        # Set the initial position of the model in the scene.
        smiley.setPos(0, 25.5, 0.5)
        
        # Create a collision node for this object.
        cNode = CollisionNode('smiley')
        # Attach a collision sphere solid to the collision node.
        cNode.addSolid(CollisionSphere(0, 0, 0, 1.1))
        # Attach the collision node to the object's model.
        smileyC = smiley.attachNewNode(cNode)
        # Set the object's collision node to render as visible.
        smileyC.show()
        
        # Load another model.
        frowney = loader.loadModel('frowney')
        # Reparent the model to render.
        frowney.reparentTo(render)
        # Set the position of the model in the scene.
        frowney.setPos(5, 25, 0)
        
        # Create a collsion node for this object.
        cNode = CollisionNode('frowney')
        # Attach a collision sphere solid to the collision node.
        cNode.addSolid(CollisionSphere(0, 0, 0, 1.1))
        # Attach the collision node to the object's model.
        frowneyC = frowney.attachNewNode(cNode)
        # Set the object's collision node to render as visible.
        frowneyC.show()
        
        # Add the Pusher collision handler to the collision traverser.
        base.cTrav.addCollider(frowneyC, pusher)
        # Add the 'frowney' collision node to the Pusher collision handler.
        pusher.addCollider(frowneyC, frowney, base.drive.node())
        
        # Have the 'smiley' sphere moving to help show what is happening.
        frowney.posInterval(5, Point3(5, 25, 0), startPos=Point3(-5, 25, 0), fluid=1).loop()
        
        # Run the scene. Move around with the mouse to see how the moving sphere changes 
        # course to avoid the one attached to the camera.
        run()
    
    




.. only:: cxx

    Incomplete Section
    ==================
    
    
    Note: this section is incomplete. It will be updated soon.