(by roly.hudson)
Generate stadium geometry and analyse view quality
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Stadium geometry from the old cValue method.

Supports cricket bowls, old english football, orthogonal bowl and radial bowls.

Generate just the 2d profile using a cValue with multiple tier parameters for each tier

Generate a bowl plan form, combine the bowl plan with the profile to make a 3d mesh of the bowl or eyepoints of spectators

With spectator eyepoints analyse them for cValue, aValue (projected area of pitch) or eValue (ergonomic factors torsion and range of viewing angles) 

More details on grasshopper3d

Sources for this are stuff I have worked on over the last 10 years with various practices

The work can be reviewed here:

More functionality on its way...