More on 180 Rule

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More on 180 Rule

• Bala Muralikrishnan
• Dept of MEES, UNCC

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180 rule

• function p1,p2,p3 oneeightyrule(p1,p2,p3,index
  )
• There are four cases to consider here
• Case 1
• if (index lt p1)
• If (theta(p2)-theta(index)ltpi)
• p1 index
• else
• p3 p2
• p2 p1
• p1 index
• end

p1
index
p2
p3
3
180 rule

• Case 2
• elseif (index lt p2)
• If (theta(p3)-theta(index)ltpi)
• p2 index
• else
• ??
• end

index
p2
p1
p3
index
p1
p2
p3
4
180 rule

• Case 3
• elseif (index lt p3)
• If (theta(index)-theta(p1)ltpi)
• ??
• else
• ??
• end

p2
p1
index
p3
p2
p1
index
p3
5
180 rule

• Case 4
• Else if (index gt p3)
• If (theta(index)-theta(p2)ltpi)
• ??
• else
• ??
• end
• end

p2
p1
p3
index
p1
p2
index
p3