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(Solved): Consider a red sphere with diffuse reflectance coefficients (0.6,0,0) centered at (-25,20,11). There ...



Consider a red sphere with diffuse reflectance coefficients (0.6,0,0) centered at (-25,20,11). There is a single point light source in the scene at (16,53,3) with light intensity (185,185,185). Assuming that there is no light attenuation, what will be the red channel value of the diffuse (Lambertian) color component of the point P = (-22,24,11) on this sphere?  



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Solution: The diffuse color component at point P is 0.6*185 = 111. Explanation: The diffuse color component at point P is 0.6*185 = 111. We can use the formula for the diffuse color component: diffuse = kd*I*max(0, dot(N,L)) where: kd is the diffuse
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