Method and apparatus for adaptive phong shading

Details Method and apparatus for adaptive phong shading Method and apparatus for adaptive phong shading

G - Physics

06

T

G06T 15/50 (2006.01)

Patent

CA 2045889

In the method and apparatus of the present invention an adaptive shading method is utilized to generate shaded images in real time. The color or intensity is first computed at each of the vertices of the polygon. A series of tests are then performed to determine the order equation that is to be used to interpolate the color or intensity across the polygon between the vertices. Using this technique, polygons having a slight or no curvature and an infinite light source (thus being the simplest form of shading), will use an extremely fast, low order equation to interpolate across the polygon. Polygons, having a high degree of curvature and/or positional light source will utilize, as necessary, a higher order equation which requires additional computation time but produces desirable shading results.

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