In 3D computer graphics rendering pipelines, how many primary polygon surface shading models are traditionally distinguished?
In 3D computer graphics rendering pipelines, how many primary polygon surface shading models are traditionally distinguished?
Multiple Choice Options
- A✓ Correct Option
3 (Flat, Gouraud, and Phong shading)
- B
2
- C
4
- D
5
Detailed Technical Solution & Explanation
In 3D computer graphics, surface illumination models are rendered across polygonal meshes using 3 classic polygon shading techniques:
1. Flat (Constant) Shading: Computes illumination once per polygon face using the surface normal. Fast, but produces visible faceted boundaries.
2. Gouraud Shading (Intensity Interpolation): Computes illumination at each polygon vertex, then bilinearly interpolates color intensities across the interior of the polygon.
3. Phong Shading (Normal Vector Interpolation): Bilinearly interpolates vertex normal vectors across the polygon surface and evaluates the lighting model at every individual pixel (fragment), producing realistic specular highlights.