[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： .yj=*N.  
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描述:请输入描述

图片:2.jpg

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关键点说几个： +ow ^xiD  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） $ .Z2Rdlv(  
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 hJ4.:  
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 :3n.nKANr  

以下是几个重要的函数： t5Mo'*j =  
1.判断点在区域中函数 C;) xjZiR  
2.计算夹角函数 Y)*lw  
3.转置函数 +?:V\niQI  
4.得到区域中心点，及区域半径函数 S7q&|nI  
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） mfN@tMp  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 8vw]u_e  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single KxwLKaImI  
   cax = x2 - x1 dSZ#,Ea"  
   cay = y2 - y1 $bosGG  
   cbx = x2 - x3 ~\G3l,4  
   cby = y2 - y3 m^.
C(}  
   mo_jj = cax * cbx + cay * cby swFOh5z  
   mo_ca = Sqr(cax * cax + cay * cay) pb Ie)nK  
   mo_cb = Sqr(cbx * cbx + cby * cby) $IT9@}*{  
   cos_acb = mo_jj / (mo_ca * mo_cb) i|^6s87"N2  
   'ff_cos = cos_acb vNSf:5H$  
   If cos_acb >= 1 Then FO=1P7  
   nn = 0 Y%l3SB,5L  
   ElseIf cos_acb <= -1 Then B
-|Zo_7  
   nn = 3.14159265258979 <pUou  
   Else l5ds`uR#  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Gnt!!1_8L  
   End If "%t`I)  
   'ff_angle = nn & }}WP:U  
   ff_angle = nn * 180 / 3.14159265258979 DZ.trtK  
End Function

'判断点在区域内函数 TF-Ty  
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 (x0*(*A}  
Dim aob, boc, cod, doa, sum As Single ,D2_Z]  
  If ppx = p1x And ppy = p1y Then %H@76NvEz  
     point_in = True p3FnYz-V  
     Exit Function n(YHk\2  
  End If wKS-O%?  
  If ppx = p2x And ppy = p2y Then 6oh@$.ThG  
     point_in = True hUvuq,LH_  
     Exit Function `Uj?PcS_  
  End If I''R\Bp  
   If ppx = p3x And ppy = p3y Then / &D$kxz  
     point_in = True DbU;jorwu  
     Exit Function 0&IXzEOr  
  End If uE#,c\[8  
     t`YZ)
>Ws  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) tK}p05nPhl  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 83ic@[  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 5YI/Ec  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 66@3$P%1p  
    sum = aob + boc + cod + doa 795Jwv
  
    If 360.01 > sum And sum > 359.99 Then 27E9NO=  
       point_in = True -N8cjr4l  
    Else sC5uA .?>9  
       point_in = False -N7L#a  
    End If hdr}!wV  
End Function

'得到点半径,得到交点坐标函数 0i*'N ch#i  
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() wHOlj)CZ  
    '求得中心点坐标 JU'WiR bcb  
Dim tt As String ?VZ11?u  
Dim rt(3) As Single yD[zzEuQ  
    '判断是否平行 Q\27\2  
   acx = p3x - p1x @Xve qUUU  
   acy = p3y - p1y j(%gMVu  
   bdx = p4x - p2x m+Q5vkW  
   bdy = p4y - p2y HCJ8@nki  
   If acx * bdy = acy * bdx Then 5"kx}f2$  
      rt(0) = 0 ^)OZ`u
8  
      Exit Function ~[zFQ)([  
   Else WjY{rM,K  
      '判断斜率存在否 5>ADw3z'  
      If p1x = p3x And p2x <> p4x Then Z#4JA/c!  
         tt = "ac_n_bd_y" [arTx^  
      ElseIf p1x <> p3x And p2x = p4x Then H~[LJ5x  
         tt = "ac_y_bd_n" aJ6#=G61l  
      ElseIf p1x <> p3x And p2x <> p4x Then dNUR)X#e  
         tt = "ac_y_bd_y" >P\h,1  
      End If .Na&I)udX.  
    Select Case tt 6.U"_%  
         Case "ac_n_bd_y" QGH h;  
            'bd线段方程 ).NcLJw_  
            k_bd = bdy / bdx Ig1lol:;  
            b_bd = p2y - k_bd * p2x TsaW5ho<p  
            p_x = p1x GSz @rDGY  
            p_y = k_bd * p_x + b_bd qnq%mwDeD  
         Case "ac_y_bd_n" Hs"% S  
            'ac线段方程 v)@,:u)  
            k_ac = acy / acx ;.ysCF  
            b_ac = p1y - k_ac * p1x 1z~k1usRK  
            p_x = p2x IjG5X[@  
            p_y = k_ac * p_x + b_ac J
o{zy  
        Case "ac_y_bd_y"
Hva2j<h  
           'ac，bd线段都要求 x7
"z(rKl  
           k_ac = acy / acx [3j$ 4rP  
           b_ac = p1y - k_ac * p1x F8{ldzh  
           k_bd = bdy / bdx M!N` Orz  
           b_bd = p2y - k_bd * p2x !}>eo2$r^  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ";PG%_(  
           p_y = k_ac * p_x + b_ac N9i}p^F<_  
        End Select :O9P(X*  
      rt(1) = p_x >vlQ|/C  
      rt(2) = p_y |x &Z~y  
     V~OUE]]Q  
'计算最大半径 0jR){G9+  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) sA/,+aM  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ~TYbP  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) =m`l%V[  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) uuu\f*<  
Dim bb(5) As Single }*iAE>;  
  bb(1) = rr1 p{NPcT%&  
  bb(2) = rr2 )fNGB]%  
  bb(3) = rr3 (E!%v`_0
 
  bb(4) = rr4 'sj9[o@]  
  nb = rr1 `$J'UXtGc  
For i = 1 To 4 U?8i'5)  
    If nb <= bb(i) Then \).Nag+  
       nb = bb(i) eh$G.-2N  
    End If z>6.[Z(T  
Next i &oA~ Tx  
    rt(0) = Sqr(nb) c#=&!FRe  
    rr = rt() z{%oJ_  
  End If !q!"UMiG  
         T3=(`  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  e\D|
o?v  

a~opE!|m  
有热压工艺方面的人才或者资料分享下； B$?^wo  
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 5]d{6Nc3P  

高手真多！

楼主威武霸气.