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# The Original Code is the Python Computer Graphics Kit.
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# The Initial Developer of the Original Code is Matthias Baas.
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# $Id: icamera.py,v 1.1.1.1 2004/12/12 14:31:41 mbaas Exp $
from protocols import Interface
from iworldobject import IWorldObject
class ICamera(IWorldObject):
"""The camera protocol.
"""
def projection(self, width, height, near, far):
"""Return the projection matrix for this camera.
This method has to return the matrix that should be used to
project the scene onto the screen. This matrix can either
be an orthographic or perspective matrix.
\param width (\c int) Viewport width
\param height (\c int) Viewport height
\param near (\c float) Near plane value
\param far (\c float) Far plane value
\return Projection matrix (\c mat4)
"""
def viewTransformation(self):
"""Return the view transformation matrix of this camera.
The view transformation transforms from World coordinates
into Camera coordinates and is usually the inverse of the
\c transform attribute. However, an implementation can
choose to cache an inverted matrix.
"""
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