08-Shading

08-Shading - Shading(coloring lighting 1 Shading...

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1 Shading (coloring, lighting)
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2 Shading Determining the light traveling from a point in the scene to the viewer’s eye Images courtesy of Watt, Watt & Watt, and Foley & van Dam
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3 Local versus Global Illumination ! Global Illumination ! Considers indirect illumination ! Reflection ! Refraction ! Shadows ! Local Illumination ! Only considers direct illumination ! No reflection ! No refraction ! Shadows possible
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4 Local versus Global Illumination 2 P 1 P Indirect Illumination Direct Illumination We will do local only for this lecture…
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5 Local versus Global Illumination Images courtesy of Francois Sillion To understand shading properly, we need to review some basic notions of physics…
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6 Ideal Specular Reflection Reflection is only in the mirror direction N L M θ
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7 Ideal Diffuse Reflection Reflection is equal in all directions diffuse r i x f ρ ω = ) , , ( N L
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8 Directional Diffuse Reflection Reflection is concentrated around the mirror direction N L M
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Ambient Light If a surface is visible from the eye, but not a light, it will be rendered black (if indirect light is not considered). Ambient light is an approximation to indirect light
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This note was uploaded on 09/27/2010 for the course CSCI 480 taught by Professor Sathyanaraya during the Spring '08 term at USC.

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08-Shading - Shading(coloring lighting 1 Shading...

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