[分享]绝对随机网点分布（excel之vba） [复制链接]

想学习的请研究下，直接给程序就没意思了，由于公司想做一套导光板的模具，没有现成的软件可用，就自己做了较简单的程序，虽然简单，但基本功能已经满足了导光板网点设计的要求；具备功能：任意多边形区域；含有光轴，且可以根据光源调整；网点密度可沿光轴方向调整，效果图如下： vMBF7Jfx  
pa1.+
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e.X*x4*>~  

关键点说几个： zd1X(e<|{  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） PGTi-o}  
2.需要定义光轴的方向；简便的方法就是指定光源坐标，及网点区域坐标，这样光轴就确定了 EA@p]+P  
3.网点区域密度可调；把区域分成若干小块，每块的密度不同即可 Jb. V4  

以下是几个重要的函数： tbbZGyg5b  
1.判断点在区域中函数 Qrr8i:Y^  
2.计算夹角函数 \[m{&%^G  
3.转置函数 ,{{e'S9cy  
4.得到区域中心点，及区域半径函数 Yvky=RM  
5.再有就是若干个点抽取其中一部分；或者采用随机分布（该方法会有重合点，所以没采用） Jzqv6A3G  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 %!_okf  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single >Q159
qZ  
   cax = x2 - x1 :nk$?5ib  
   cay = y2 - y1 zq(R!a6  
   cbx = x2 - x3 $9_yD&&  
   cby = y2 - y3 XYeuYLut  
   mo_jj = cax * cbx + cay * cby nYfZ[Q>v  
   mo_ca = Sqr(cax * cax + cay * cay) ~Q
q0  
   mo_cb = Sqr(cbx * cbx + cby * cby) AOvn<Q  
   cos_acb = mo_jj / (mo_ca * mo_cb) (`z
`
ni  
   'ff_cos = cos_acb lIs<&-0  
   If cos_acb >= 1 Then $:v!*0/  
   nn = 0 eVD
O]5?  
   ElseIf cos_acb <= -1 Then C_c*21X  
   nn = 3.14159265258979 9d4Agj M  
   Else Xbm\"g
\  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) gpo+-NnG  
   End If <,r(^Ntz  
   'ff_angle = nn ~,199K#'  
   ff_angle = nn * 180 / 3.14159265258979 <{ Z$!]i1  
End Function

'判断点在区域内函数 zOV.cI6fZz  
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 (5-4`:1ux  
Dim aob, boc, cod, doa, sum As Single =Zg%& J  
  If ppx = p1x And ppy = p1y Then zjuU*$A4  
     point_in = True Lm-
yTMNPn  
     Exit Function $-tgd<2h  
  End If STfcx]L  
  If ppx = p2x And ppy = p2y Then dnZA+Pa  
     point_in = True _A[k&nO!&J  
     Exit Function q4'Vb  
  End If hcQky/c\#b  
   If ppx = p3x And ppy = p3y Then ;r**`O  
     point_in = True KF'DOXBw>  
     Exit Function `pB]_"b  
  End If zcn> 4E)  
     a{oG[e   
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ;QRnZqSv  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) QX1rnVzg0  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) U$-;^=;  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) F@+FXnz  
    sum = aob + boc + cod + doa tH7@oV;  
    If 360.01 > sum And sum > 359.99 Then tEj-c@`"x-  
       point_in = True ?9F_E+!  
    Else mJj [f8  
       point_in = False BCrX>Pp}r  
    End If F4Jc7k2  
End Function

'得到点半径,得到交点坐标函数 LjE@[@d  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() ,KM-DCwcG  
    '求得中心点坐标 Z#J cNquM  
Dim tt As String :^G;`T`L  
Dim rt(3) As Single Lc0U-!{G  
    '判断是否平行 ?Re6oLm<B  
   acx = p3x - p1x zOkIPv52~  
   acy = p3y - p1y 2+Y8b::  
   bdx = p4x - p2x MS_@ Xe  
   bdy = p4y - p2y `|t X[':  
   If acx * bdy = acy * bdx Then $p(,Qz(.8  
      rt(0) = 0 7tEK&+H`  
      Exit Function C(
ay7  
   Else (%i)A$i6a  
      '判断斜率存在否 Qh3V[br  
      If p1x = p3x And p2x <> p4x Then `|Ll  
         tt = "ac_n_bd_y" cz2guUu  
      ElseIf p1x <> p3x And p2x = p4x Then 0<,Q7onDD:  
         tt = "ac_y_bd_n" )_MIUQ%  
      ElseIf p1x <> p3x And p2x <> p4x Then |GDf<\  
         tt = "ac_y_bd_y" FN25,Q8:*I  
      End If M-K.[}}-d  
    Select Case tt Bi!j re  
         Case "ac_n_bd_y" $. ;j4%%  
            'bd线段方程 H1FD|Q3  
            k_bd = bdy / bdx ^KBE2C  
            b_bd = p2y - k_bd * p2x l> Mth+,b  
            p_x = p1x @,Re<%\  
            p_y = k_bd * p_x + b_bd |L@9q
wF  
         Case "ac_y_bd_n" wR x5` @  
            'ac线段方程 ?r`UBR+[  
            k_ac = acy / acx ^m3[mY [a  
            b_ac = p1y - k_ac * p1x Tb2Tb2C  
            p_x = p2x Eyv|~D  
            p_y = k_ac * p_x + b_ac TQcEe@$)  
        Case "ac_y_bd_y" DgJG: D{  
           'ac，bd线段都要求 eH*u,/  
           k_ac = acy / acx fnZaIV=H  
           b_ac = p1y - k_ac * p1x #4?(A[]>H  
           k_bd = bdy / bdx eX+FtN  
           b_bd = p2y - k_bd * p2x U%Igj:%?;`  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) x vi&d1  
           p_y = k_ac * p_x + b_ac #^\qFj  
        End Select 5i 6*$#OM_  
      rt(1) = p_x *zf@J'  
      rt(2) = p_y f/FK>oUh  
     :4{;^|RgU  
'计算最大半径 i$Rlb5RU  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) xn
yp'O8yk  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 97$1na3gq  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) v4:g*MD?~  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) q ;@
:,^  
Dim bb(5) As Single A? =(
q  
  bb(1) = rr1 ~7N>tjB  
  bb(2) = rr2 /,>@+^1  
  bb(3) = rr3 l c<&f  
  bb(4) = rr4 LPg1G+e  
  nb = rr1 jslfq@5v  
For i = 1 To 4 0(uNFyIG  
    If nb <= bb(i) Then R*C  
       nb = bb(i) WIe2j  
    End If "S">#.L  
Next i ZQd\!K8y^Q  
    rt(0) = Sqr(nb) 91Cg   
    rr = rt() 0@ -
3U{Q  
  End If /K#t$
O4  
         F-^#EkEGe  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  kfF.Ctr1a  

giy4<   
有热压工艺方面的人才或者资料分享下； x,Im%!h  
我公司主要做透镜类产品，现在有客户要审核我公司的导光膜工艺，头疼 =K<8X!xUW  

高手真多！

楼主威武霸气.