1.5 SHADED POLYGONS

 

• This method is identical to the previous method, except a polygon will be filled with pixels of varying color, which makes the object appear more real.

 

• A Light Source(s) is defined for a picture. The light has a specific color, direction, distance, etc.

 

• Ambient light (background, non-direct) also plays a part.

 

 

• The color of a pixel will change with the angle of the polygon to the light, the distance from the light, the color of the light, etc.

 

• Advantages,

- the solid begins to look like cartoons, or paintings

- still simple to understand and implement

• Disadvantages,

- can be slow

- requires shaded image display capabilities

 

• Many Shading methods can be used to give different approximations of light,

- Goroud shading

- Phong shading

 

 

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