• Ken Martin's avatar
    Improve the shadow maps in VTK · f983396c
    Ken Martin authored
    This patch changes how the shadow maps work so that
    less shadow code is in the mappers. Now the mappers get
    a key that contains the shadow map pass and they let
    that pass handle setting up shader code and uniforms.
    
    Also changed the shadow map algorithm slightly.  The old approach did
    a 1/3 weighting of pixels (0,0) (1,0) and (0,1)  This new algorithm
    does a 2x2 box convolution against the 3x3 pixel neighborhood.
    It takes 9 tex lookups but produces much nicer results.
    f983396c
vtkShadowMapPass.cxx 15.1 KB