'判断点在区域内函数 S5Px9&N8(
Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean W'0wT ZG
Dim aob, boc, cod, doa, sum As Single (I~,&aBr
If ppx = p1x And ppy = p1y Then )sS<%Xf
point_in = True [7s5Vt|
Exit Function Ixec]UOS
End If #uXOyiE
If ppx = p2x And ppy = p2y Then w\2[dd
point_in = True Om1z
Exit Function Vi? Z`G]w!
End If ~IWi@m{
If ppx = p3x And ppy = p3y Then
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point_in = True vo(?[[
Exit Function <m6I)}K
End If 25~$qY_
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aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 0'~b<>G%
boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Uq+
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cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) mpF_+Mn
doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 2E1TJ.[BS
sum = aob + boc + cod + doa q-3KF
If 360.01 > sum And sum > 359.99 Then jN<]yhqf
point_in = True 2b"5/$|6
Else !KlSw,&=.6
point_in = False JX/d;N7a
End If &4%J35~
End Function