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# $Id: gltargetspotlight.py,v 1.4 2005/07/03 09:43:36 mbaas Exp $

## \file gltargetspotlight.py
## Contains the GLTargetSpotLight class.

import protocols
import scene
from Interfaces import *
from slots import *
from cgtypes import vec3
from worldobject import _initWorldObject, _preInitWorldObject
import lookat
import cmds
import _core

# GLTargetSpotLight
class GLTargetSpotLight(_core.GLSpotLight):
    """This class represents an OpenGL spot light.

    The direction of the light is the local positive Z axis.
    """

    protocols.advise(instancesProvide=[ISceneItem])

    def __init__(self,
                 name="GLSpotLight",
                 parent=None,
                 enabled=True,
                 intensity=1.0,
                 ambient=None,
                 diffuse=None,
                 specular=None,
                 constant_attenuation=1.0,
                 linear_attenuation=0.0,
                 quadratic_attenuation=0.0,
                 exponent=0.0,
                 cutoff=45.0,
                 target=vec3(0,0,0),
                 cast_shadow = False,
                 auto_insert=True,
                 **params
                 ):
        exec _preInitWorldObject
        _core.GLSpotLight.__init__(self, name)

        _initWorldObject(self, name=name, parent=parent,
                         auto_insert=auto_insert,
                         **params)

        target = vec3(target)

        # Target
        self.target_slot = Vec3Slot(target)
        self.addSlot("target", self.target_slot)

        self.enabled = enabled
        self.intensity = intensity
        if ambient!=None:
            self.ambient = vec3(ambient)
        if diffuse!=None:
            self.diffuse = vec3(diffuse)
        if specular!=None:
            self.specular = vec3(specular)
        self.constant_attenuation = constant_attenuation
        self.linear_attenuation = linear_attenuation
        self.quadratic_attenuation = quadratic_attenuation
        self.exponent = exponent
        self.cutoff = cutoff

        self.cast_shadow = cast_shadow

        # Create the internal LookAt component
        self._lookat = lookat.LookAt()
        self._lookat.name = "GLTargetSpot_LookAt"
        self._lookat.output_slot.connect(self.rot_slot)
        self.pos_slot.connect(self._lookat.pos_slot)
        self.target_slot.connect(self._lookat.target_slot)
        

    # Create the "target" property
    exec slotPropertyCode("target")

    def protocols(self):
        return [ISceneItem]

    

        
