[back]  3.34. Snail Surface 
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The snail surface [ 8 ] is represented by the following equations.
x = u cos(v) sin(u) 
3117 

y = u cos(u) cos(v) 
3118 

z = u sin(v) 
3119 
To represent the area, the two parameters u and v can assume the following values (domain of definition), for example.
u is an element from the set of numbers [0, 2 pi] 

v is an element from the number set [pi, pi] 
The domain of definition can be changed in the plugin.
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