'判断点在区域内函数 s M*ay,v;
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 Px&_6}YWy
Dim aob, boc, cod, doa, sum As Single N!Rt040.%
If ppx = p1x And ppy = p1y Then }zx
~
point_in = True a]T&-#c,}
Exit Function -rn6ZSD)
End If ddyX+.LMk
If ppx = p2x And ppy = p2y Then Xh>($ U
point_in = True 5|nc^
12
Exit Function r4fHD~#l{
End If P.qzP/Ny
If ppx = p3x And ppy = p3y Then #K6cBfqI
point_in = True P/dnH
Exit Function 8'HS$J;C
End If F,{mF2U*$
o$buoGSPc
aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) &'x~<rx
boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Ff%V1BH[
cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) avL_>7q
doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) i*Ldec^
sum = aob + boc + cod + doa 4]uj+J
If 360.01 > sum And sum > 359.99 Then uTxa5j
point_in = True /rnI"ze`
Else kB> ~Tb0
point_in = False {VE
h@yn
End If Cq"KKuf
End Function