'判断点在区域内函数 !JjNm*F[
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 lOIf4
Dim aob, boc, cod, doa, sum As Single R}OjSiS\
If ppx = p1x And ppy = p1y Then dW|S\S'&
point_in = True >-CNHb
Exit Function h~&5;
End If C7
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If ppx = p2x And ppy = p2y Then )OQih+#?W
point_in = True P[Id[}5Pw
Exit Function :C#(yp
End If Reg%ah|$/=
If ppx = p3x And ppy = p3y Then %i.;~>
point_in = True 9 NC'iFQ#
Exit Function Qu|<1CrZj]
End If c 9zMI
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aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Z&J.8A]L
boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) "Za 'K+4
cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) /JP%gD"8
doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) )TkXdA?.
sum = aob + boc + cod + doa 0
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If 360.01 > sum And sum > 359.99 Then cbX<
point_in = True L' x[wM0w;
Else <%LN3T
point_in = False gG,gL9o
End If m' L8z
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End Function