Computer Graphics Part 6a (Lighting)
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Give the general idea/definition of lighting..
How to compute the color of objects according to the position of light, normal vector and camera position (-> Phong illumination model)
What affects the color of a point on the object?
- position of sample point
- position of the light
- color and intensity of the light
- camera vector
- normal vector of the surface at the vertex
- ohysical charactersistics of the object (reflectance model, color)
Explain the Phong illumination model
- 3 parameter model - simple sum of 3 illumination terms
specular reflection detail
How do you deal with multiple light sources?
how are dot products used in lighting calculations?
How does the computation of different colors work?
How do you account for light attenuation (alter the lighting equation)?
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