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##

Parameter Interpolation and Normalization

Phong shading implies that for every pixel, the vectors being involved in the
shading equation are interpolated, normalized and their dot product computed.
Without normalization the highlights get lost across a polygon. To be general,
the interpolation of two vectors
and
is
considered. This can be any vectors: the light vector , viewing
vector or normal vector .

**Subsections**

Gerald Schröcker
2002-03-21