[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： #eZ6)i<  
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关键点说几个： -4rDbDsr  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） `!:q;i]}  
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 Ab%;Z5$fr  
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 @RFs/'  

以下是几个重要的函数： [ xOzzp4  
1.判断点在区域中函数 I$NhXZ)KT  
2.计算夹角函数 R+q"_90_  
3.转置函数 RCTQhTy=  
4.得到区域中心点，及区域半径函数 O1 .w,U   
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） lkyzNy9R  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ZKQ hbNT  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single RT93Mt%P  
   cax = x2 - x1 Eca\fkj  
   cay = y2 - y1 Q'+MFld  
   cbx = x2 - x3 LA_3=@2.H  
   cby = y2 - y3 e{;OSk`x  
   mo_jj = cax * cbx + cay * cby /vY_Y3k#  
   mo_ca = Sqr(cax * cax + cay * cay) I$Qs;- (  
   mo_cb = Sqr(cbx * cbx + cby * cby) gH2,\z`[4  
   cos_acb = mo_jj / (mo_ca * mo_cb) -/_L*oYli  
   'ff_cos = cos_acb ky 8ep  
   If cos_acb >= 1 Then ze_{=Cv&Y  
   nn = 0 e*(b  
   ElseIf cos_acb <= -1 Then "dR|[a<#g  
   nn = 3.14159265258979 G*S|KH  
   Else #-3=o6DCK  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) mcz+P |  
   End If ,+qVu,  
   'ff_angle = nn *Nyev]8  
   ff_angle = nn * 180 / 3.14159265258979 bifS 2>c  
End Function

'判断点在区域内函数 < RCLI|  
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 aNyvNEV3C  
Dim aob, boc, cod, doa, sum As Single K:'q>D@  
  If ppx = p1x And ppy = p1y Then b{fQ|QD{^E  
     point_in = True liR?  
     Exit Function {]z4k[;.h  
  End If "x@=
'>:$  
  If ppx = p2x And ppy = p2y Then {;2vmx9  
     point_in = True "cTncL  
     Exit Function 5Z4-Z  
  End If tbnH,*  
   If ppx = p3x And ppy = p3y Then Kj=b[e%  
     point_in = True j)t+jcMUI  
     Exit Function iHf-{[[Z  
  End If SuZ&vqS  
     Qu,8t8  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) a[lY S{  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) `%3/   
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) m/NdJMoN=  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) {JV@"t-X3"  
    sum = aob + boc + cod + doa IVlf=k  
    If 360.01 > sum And sum > 359.99 Then JbB}y'c4}=  
       point_in = True I\qYkWg7  
    Else =)O,`.M.Y  
       point_in = False 1FtM>&%4  
    End If n.hv!W0  
End Function

'得到点半径,得到交点坐标函数 d--y  
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() LQnkcV  
    '求得中心点坐标 m\/ Tj0e  
Dim tt As String yfU<
UQ!1  
Dim rt(3) As Single MxzLK%am  
    '判断是否平行 v#=`%]mL  
   acx = p3x - p1x {brMqE>P#  
   acy = p3y - p1y 0J.dG/I%  
   bdx = p4x - p2x x\2?y
m@  
   bdy = p4y - p2y fjnTe  
   If acx * bdy = acy * bdx Then )} DUMq7  
      rt(0) = 0 Oi"a:bCU  
      Exit Function {{C`mgC  
   Else 9+,R`v  
      '判断斜率存在否 !L5jj#0  
      If p1x = p3x And p2x <> p4x Then vd`}/~o  
         tt = "ac_n_bd_y" t>B^q3\q?  
      ElseIf p1x <> p3x And p2x = p4x Then 8Ry7
4|`=R  
         tt = "ac_y_bd_n" EkT."K  
      ElseIf p1x <> p3x And p2x <> p4x Then C@N1ljXJT  
         tt = "ac_y_bd_y" k%[3Q>5iM  
      End If y]%w)4PS  
    Select Case tt +l^LlqA  
         Case "ac_n_bd_y" R{,ooxH\J  
            'bd线段方程 CukC6ub  
            k_bd = bdy / bdx UN"(5a8.  
            b_bd = p2y - k_bd * p2x 7^}Ll@  
            p_x = p1x vi@Lz3}::  
            p_y = k_bd * p_x + b_bd (h']a!  
         Case "ac_y_bd_n" q.Nweu!jQ  
            'ac线段方程 .^)UO  
            k_ac = acy / acx lCW8<g^  
            b_ac = p1y - k_ac * p1x R~bC,`Bh  
            p_x = p2x Oo?,f
w  
            p_y = k_ac * p_x + b_ac 5q@LxDy,b  
        Case "ac_y_bd_y" 7j5f ;O^+  
           'ac，bd线段都要求 E2GGEKrW  
           k_ac = acy / acx X &2oPo  
           b_ac = p1y - k_ac * p1x hzI*{  
           k_bd = bdy / bdx 5=(c%  
           b_bd = p2y - k_bd * p2x 7\o!HMfK  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) {F&-7u0  
           p_y = k_ac * p_x + b_ac xr0haN\p"  
        End Select 9*6]&:fm  
      rt(1) = p_x pIWI  
      rt(2) = p_y UDf9FnG}L  
     KlK`;cr?  
'计算最大半径 _DRrznaw  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) \Mv":Lm1  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) WS& kx~oQ  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) c41: !u^  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) /8@m<CW2Y  
Dim bb(5) As Single r!}al5~&  
  bb(1) = rr1 n{*e 9Aw  
  bb(2) = rr2 +@X5!S6  
  bb(3) = rr3 G;gJNK"e  
  bb(4) = rr4 /R X1UQ.s  
  nb = rr1 Q5S,{ ZeT  
For i = 1 To 4 OEd
Jc\n_R  
    If nb <= bb(i) Then PIcrA2ll  
       nb = bb(i) n$m"]inX  
    End If FDR1Gy  
Next i }aB#z<B6  
    rt(0) = Sqr(nb) /EwGW  
    rr = rt() \^*< y-jL  
  End If *X%m@KLIKv  
         e2CV6F@a  
End Function

高手啊.人才啊.

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

^^LjI  
有热压工艺方面的人才或者资料分享下； c cG['7  
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 Zy$Lrr!  

高手真多！

楼主威武霸气.