'判断点在区域内函数
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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 jGCW ^#GE
Dim aob, boc, cod, doa, sum As Single /H% pOL6(r
If ppx = p1x And ppy = p1y Then )%7A. UO)
point_in = True \^cn}db)
Exit Function {xX|5/z
End If )J0V B't
If ppx = p2x And ppy = p2y Then &Te:l-x
point_in = True *79<ypKG$
Exit Function M{QNpoM
End If <k!G%R<9
If ppx = p3x And ppy = p3y Then ngjbE +
point_in = True elN3B91\6r
Exit Function e1-=|!U7#
End If .YkKIei
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aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) J :(l&
boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) #a&Vx&7L
cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) HChewrUAn
doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) "e"`Or
sum = aob + boc + cod + doa ^ytd~iK8
If 360.01 > sum And sum > 359.99 Then F t}tIP7
point_in = True j;
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Else Y>+ D\|%Q
point_in = False 2i)y'+s
End If &}uO ]0bR
End Function
