[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： ,8U&?8l  
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关键点说几个： S 6@u@C  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） k:t]s_`<  
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 n9W(bG o  
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 Pr':51(  

以下是几个重要的函数： SE@LYeC}dE  
1.判断点在区域中函数 >c1qpk/  
2.计算夹角函数 cM(:xv  
3.转置函数 *v;2PP[^  
4.得到区域中心点，及区域半径函数 'nzg6^I7g  
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） 8g@<d^8@  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 l5S aT,%  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single |kyX3~  
   cax = x2 - x1 v [wb~uw\  
   cay = y2 - y1 >8~.wXyoC  
   cbx = x2 - x3 dPW#C5
dm  
   cby = y2 - y3 m~iXl,r  
   mo_jj = cax * cbx + cay * cby C.WX.Je  
   mo_ca = Sqr(cax * cax + cay * cay) du<tGsy  
   mo_cb = Sqr(cbx * cbx + cby * cby) g;H=6JeG/  
   cos_acb = mo_jj / (mo_ca * mo_cb) kKaE=H-x  
   'ff_cos = cos_acb Y+kfBvxyf  
   If cos_acb >= 1 Then qmkAg }2  
   nn = 0 [`ebM,W  
   ElseIf cos_acb <= -1 Then Z+*9#!?J  
   nn = 3.14159265258979 !EvAB+`jLI  
   Else zIqU,n|]s  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) \T4v|Pw\  
   End If OV1_|##LC  
   'ff_angle = nn Eq%}  
   ff_angle = nn * 180 / 3.14159265258979 H9'$C/w  
End Function

'判断点在区域内函数 aZH:#lUlj  
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 w;%.2VJ  
Dim aob, boc, cod, doa, sum As Single f/U`  
  If ppx = p1x And ppy = p1y Then )MtF23k)g  
     point_in = True 8EZ$g<}  
     Exit Function S8kCp;  
  End If p\Q5,eg  
  If ppx = p2x And ppy = p2y Then MU($|hwiL  
     point_in = True  `xKp%9  
     Exit Function BOX{]EOj  
  End If 'f#{{KA  
   If ppx = p3x And ppy = p3y Then hwPw]Ln/  
     point_in = True Mer/G2#&  
     Exit Function "H=6j)Cb  
  End If E@z<:pG{  
     `XJG(Oas\  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) kDEXN  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) @bi}W`  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) TtJH7  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) Fe#  1  
    sum = aob + boc + cod + doa h&M{]E9=  
    If 360.01 > sum And sum > 359.99 Then 3$9s\<j  
       point_in = True >f|||H}Snw  
    Else 034iK[ib"  
       point_in = False ?1*cO:O  
    End If ^-TE([bW  
End Function

'得到点半径,得到交点坐标函数 M f}~{+  
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() wVvF^VHV^  
    '求得中心点坐标 b10cuy|a/X  
Dim tt As String w0[6t#$F  
Dim rt(3) As Single 4`lLf  
    '判断是否平行 B~?*?Z'  
   acx = p3x - p1x On8v//=&  
   acy = p3y - p1y 5u,{6  
   bdx = p4x - p2x I!ED?n  
   bdy = p4y - p2y @T@<_ ?)  
   If acx * bdy = acy * bdx Then *zaQx+L  
      rt(0) = 0 jqz ux[6{  
      Exit Function ^NLmgwQ  
   Else ! :Y:pu0  
      '判断斜率存在否 {IjF+@I  
      If p1x = p3x And p2x <> p4x Then /RG:W0=K  
         tt = "ac_n_bd_y" >d(~#Z`  
      ElseIf p1x <> p3x And p2x = p4x Then 2pZXZ  
         tt = "ac_y_bd_n" D+#E-8  
      ElseIf p1x <> p3x And p2x <> p4x Then \/
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         tt = "ac_y_bd_y" ):P?  
      End If ,xw#NG6  
    Select Case tt 2\R'@L*  
         Case "ac_n_bd_y" w{{gu1#]G  
            'bd线段方程 T5|qRlW  
            k_bd = bdy / bdx 8mCxn@yV  
            b_bd = p2y - k_bd * p2x vXev$x=w-  
            p_x = p1x jxP;>K7O  
            p_y = k_bd * p_x + b_bd zp6C3RG(  
         Case "ac_y_bd_n" 0!D4pvlt  
            'ac线段方程 {k(g]#pP  
            k_ac = acy / acx &]Q@7Nl7:l  
            b_ac = p1y - k_ac * p1x <c*FCblv  
            p_x = p2x {WJm  
            p_y = k_ac * p_x + b_ac |a8iZ9/D6  
        Case "ac_y_bd_y"  hz{`h  
           'ac，bd线段都要求  52Yq  
           k_ac = acy / acx M+-*QyCFK  
           b_ac = p1y - k_ac * p1x 4M^=nae  
           k_bd = bdy / bdx Dxtp2wu%t  
           b_bd = p2y - k_bd * p2x IWk4&yHUAu  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) !d'GE`w T  
           p_y = k_ac * p_x + b_ac \h+
AXs<j  
        End Select 6S},(=  
      rt(1) = p_x 1}"++Z73P  
      rt(2) = p_y XYQ/^SI!:  
     Qo>b*Ku;  
'计算最大半径 3\AU 72-  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Fzm*Pz3  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) c7?_46J  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ,yC-+VL  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) SfA\}@3  
Dim bb(5) As Single 97Lte5c6r  
  bb(1) = rr1 j 'FVz&  
  bb(2) = rr2 '|ad_M  
  bb(3) = rr3 >d@&2FTO  
  bb(4) = rr4 |U~<3.:m:  
  nb = rr1 U1Q:= yD  
For i = 1 To 4 W=lyIb{?^0  
    If nb <= bb(i) Then '-QwssE  
       nb = bb(i) :X"?kK0V  
    End If xP_cQwm`1  
Next i MvuQz7M#d  
    rt(0) = Sqr(nb) xg30xC[  
    rr = rt() 0mpX)S  
  End If (DJ"WG  
         "Hya6k>j  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  }
e!x5g   

! _f9NK  
有热压工艺方面的人才或者资料分享下； FFV `P  
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 4F)-"ck  

高手真多！

楼主威武霸气.