CSC418 Computer Graphics Shading Color.

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Presentation transcript:

CSC418 Computer Graphics Shading Color

Flat Shading Apply only one illumination calculation for each face. Which point on the facet do we illuminate? Pros? Cons?

Gouraud Shading Apply the illumination model at vertices and interpolate the color intensity across faces. Remember bilinear interpolation? Pros? Cons?

Phong Shading Not to be confused with Phong Illumination model. Apply the illumination model at every point on the face. Calculate the normal at any point in a face by interpolating the vertex normals.of that face. Pros? Cons? Silhouettes?

Light & Color Visible Light (Energy at various wavelengths) 400-700nm HSV (Hue, Saturation, Value) Complementary colors 3 color matching Metamers Pure colors

CIE chromaticity CIE theoretical XYZ colors (not physically realizable) why? Normalizing the color

CIE chromaticity Color gamut

Next Lecture midterm!! …and the crowd goes wild!