Demerit - phong shading or normal vector interpolation shadi, Computer Graphics

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Demerit - phong shading or normal vector interpolation shading

Needs lot of computations to determine intensity at a point, hence increases the cost of shading in any implementation.

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This renders a polygon surface by linearly interpolating intensity values across the surface. Intensity values for each polygon are matched with the values of adjacent polygon alon

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For good understanding of the application of the rules specified above see the following figure, where the shaded region demonstrates the clipped polygon. Fi

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Phong Model or Phong Specular Reflection Model It is an empirical model that is not based on physics, although physical observation. Phong observed here for extremely shiny su

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