'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 wMkHx3XD
Dim aob, boc, cod, doa, sum As Single KsGW@Ho:
If ppx = p1x And ppy = p1y Then sm"Rp~[i
point_in = True ,i6U*
Exit Function pcv\|)&}
End If ,$!F,c
If ppx = p2x And ppy = p2y Then 7x.j:{2
point_in = True %V;*E]
Exit Function 4Kt0}W
End If H6Zo|n
If ppx = p3x And ppy = p3y Then "~ =O`5V
point_in = True ;a|%W4 "
Exit Function K91O$'J
End If F&`%L#s|
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aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) - 5v{p
boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Wlg 1t~1=
cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) }#tbK 2[
doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) xjD$i'V+
sum = aob + boc + cod + doa '=G6$O2
If 360.01 > sum And sum > 359.99 Then j0"4X
point_in = True ^PC;fn,I
Else x
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point_in = False kXdXyq
End If o5RvxGN
End Function