[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： 7`P1=`..  
3vc2t6S%*  
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关键点说几个： j"4]iI+{"  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） $=ua$R4Z+  
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 @tfatq+q  
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 aUyJi  

以下是几个重要的函数： a-Ne!M[  
1.判断点在区域中函数 g7`uWAxZa  
2.计算夹角函数 [W--%=Ou  
3.转置函数 m'"Ra-  
4.得到区域中心点，及区域半径函数 ;Ebpf J  
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） [h@MA
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6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ghVxcK  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ^#,cWG}z  
   cax = x2 - x1 Xb5$ijH  
   cay = y2 - y1 xyaU!E*  
   cbx = x2 - x3 }c;h:CE#  
   cby = y2 - y3 *+>R^\uT  
   mo_jj = cax * cbx + cay * cby ]qNPOnlp  
   mo_ca = Sqr(cax * cax + cay * cay) JrVBd hLr  
   mo_cb = Sqr(cbx * cbx + cby * cby) `^1&Qz>  
   cos_acb = mo_jj / (mo_ca * mo_cb) [0-zJy|,  
   'ff_cos = cos_acb
Dwi[aC+k  
   If cos_acb >= 1 Then cwKOE?!  
   nn = 0 %{K6
 
   ElseIf cos_acb <= -1 Then G[[NDK  
   nn = 3.14159265258979 dD}!E  
   Else ,';+
A{aV  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) A}Gj;vaw  
   End If 2z
=GKV  
   'ff_angle = nn n:5*Tg9  
   ff_angle = nn * 180 / 3.14159265258979 EL=}xug,?  
End Function

'判断点在区域内函数 m K@a7fF?  
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 vaEAjg*To<  
Dim aob, boc, cod, doa, sum As Single /@\3#2;  
  If ppx = p1x And ppy = p1y Then k<3_!?3  
     point_in = True DLrG-C33  
     Exit Function .5m^)hi  
  End If  p3r1lUw  
  If ppx = p2x And ppy = p2y Then pd{;
`EW|  
     point_in = True ,.+"10=N.  
     Exit Function wOp# mT  
  End If Y)L\*+ >"[  
   If ppx = p3x And ppy = p3y Then tFd^5A*  
     point_in = True A*:(%!  
     Exit Function UW[{Y|oE  
  End If 4';]fmf@[i  
     ;ckv$S[p  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 6c>tA2G|8  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) i#~1|2  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) \T_?<t,UT  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) [+st?;"GF  
    sum = aob + boc + cod + doa f-tV8  
    If 360.01 > sum And sum > 359.99 Then sE8.,\  
       point_in = True D{,B[5  
    Else Gr;~P*  
       point_in = False '#.:%4  
    End If AOaf,ZF 8  
End Function

'得到点半径,得到交点坐标函数 7OOB6[.fu  
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() 79%${ajSI  
    '求得中心点坐标 t MB;GIb#  
Dim tt As String DZXv3gnX  
Dim rt(3) As Single A?;/]m;  
    '判断是否平行 ,7M9f  
   acx = p3x - p1x &K^h'>t'  
   acy = p3y - p1y r\[HR
^`  
   bdx = p4x - p2x %'* |N[  
   bdy = p4y - p2y $}k"wI[  
   If acx * bdy = acy * bdx Then 3MjMN%{P  
      rt(0) = 0 2uWzcy ?F  
      Exit Function L#u6_`XJ+  
   Else kQIWDN  
      '判断斜率存在否 9~,eu  
      If p1x = p3x And p2x <> p4x Then IHo6&  
         tt = "ac_n_bd_y" $vy.BYFm  
      ElseIf p1x <> p3x And p2x = p4x Then W{;!JI7;z  
         tt = "ac_y_bd_n" mc(&'U8R0I  
      ElseIf p1x <> p3x And p2x <> p4x Then oT|E\wj  
         tt = "ac_y_bd_y" VUF7-C*  
      End If -"a+<(Y  
    Select Case tt i}<R>]S  
         Case "ac_n_bd_y" e`$v\7K  
            'bd线段方程 {=g-zsc]K  
            k_bd = bdy / bdx 4kg9
R^0  
            b_bd = p2y - k_bd * p2x 6g$04C3tHi  
            p_x = p1x b9y E  
            p_y = k_bd * p_x + b_bd EmY4>lr  
         Case "ac_y_bd_n" |x
<  
            'ac线段方程 A{6ZEQAh>  
            k_ac = acy / acx $
LRFG(  
            b_ac = p1y - k_ac * p1x ?o.G@-  
            p_x = p2x }UGPEf\  
            p_y = k_ac * p_x + b_ac i]$d3J3  
        Case "ac_y_bd_y" jSYj+k  
           'ac，bd线段都要求 1|gP :t}  
           k_ac = acy / acx ?>o39|M_w  
           b_ac = p1y - k_ac * p1x bvu` =  
           k_bd = bdy / bdx DR0W)K ^  
           b_bd = p2y - k_bd * p2x !)9zH  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ',!#?aGV  
           p_y = k_ac * p_x + b_ac ao-C9|2>NU  
        End Select NOS5bm&-  
      rt(1) = p_x wqGZkFg1  
      rt(2) = p_y i2j)%Gc}  
     *q0N$}k  
'计算最大半径 tIr66'8  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Y*}Sq|y  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) e;6Sj  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) >Le mTr  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) H7SqM D*y9  
Dim bb(5) As Single f8&=D4)-w  
  bb(1) = rr1 \:=Phbn  
  bb(2) = rr2 v;$^1I  
  bb(3) = rr3 gN]`$==c[  
  bb(4) = rr4 ev?>Nq+Z  
  nb = rr1 P!O#"(r2]  
For i = 1 To 4 r\NnWS J  
    If nb <= bb(i) Then ;:!LAe  
       nb = bb(i) S$H
4xkKs  
    End If 0"QE,pLe4  
Next i Lw#hnLI.  
    rt(0) = Sqr(nb) e+6~JbMV  
    rr = rt() gEe}xI  
  End If p~mB;pZ%;  
         gvU6p[D  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  m&q;.|W  

]| yH8m  
有热压工艺方面的人才或者资料分享下； +Xp;T`,v  
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 fh^_=R(/  

高手真多！

楼主威武霸气.