'判断点在区域内函数 *&f$K1p
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 wd)jl%
Dim aob, boc, cod, doa, sum As Single <\;#jF%V
If ppx = p1x And ppy = p1y Then &d|r~NhP
point_in = True !fj(tPq
Exit Function "U7qo}`I
End If M}!2H*
If ppx = p2x And ppy = p2y Then HF(KN{0.B
point_in = True 2,*M|+W~
Exit Function `hb%+-lj+
End If G\(|N9^:
If ppx = p3x And ppy = p3y Then o^
XtU5SVq
point_in = True 2p"WTd
Exit Function F;]%V%F.X
End If @*sWu_-Y%
AF%@VLf
aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) +>PX&F
boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) )P+7PhE{J
cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) pxa(
doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) qT^I?g"!
sum = aob + boc + cod + doa ,2W8=ON
If 360.01 > sum And sum > 359.99 Then `*shF9.\C
point_in = True hodgDrmO/
Else B
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point_in = False )vSRHE
End If k`N^Vdr
End Function