[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： 0z.oPV@  
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关键点说几个： ae_Y?g+3  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） waT'|9{  
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 n W:P"L  
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 oG{0{%*@  

以下是几个重要的函数： @@uKOFA?  
1.判断点在区域中函数 ^hZZ5(</8P  
2.计算夹角函数 X/Sp!W-H  
3.转置函数 n4Xh}KtH  
4.得到区域中心点，及区域半径函数 ` ES-LLhVf  
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） e\)r"!?H`  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 wHuz~y6  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single nz2`YyR  
   cax = x2 - x1 +,c]FAx4  
   cay = y2 - y1 /0m0""  
   cbx = x2 - x3 yRAfIB$T}"  
   cby = y2 - y3 3le$0f:O  
   mo_jj = cax * cbx + cay * cby n?(s
n  
   mo_ca = Sqr(cax * cax + cay * cay) {e!3|&AX  
   mo_cb = Sqr(cbx * cbx + cby * cby) yOTC>?p%  
   cos_acb = mo_jj / (mo_ca * mo_cb) L$t.$[~L  
   'ff_cos = cos_acb @6"+x  
   If cos_acb >= 1 Then >q&X#E<w  
   nn = 0 -y|*x-iZ  
   ElseIf cos_acb <= -1 Then l~Hu#+O  
   nn = 3.14159265258979 7TW&=(  
   Else W\EvMV"  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ;UpdkY 1  
   End If ~e<^jhpJ
 
   'ff_angle = nn A1Es>NK[qW  
   ff_angle = nn * 180 / 3.14159265258979 7TtDI=f  
End Function

'判断点在区域内函数 uCx6/n6'  
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 zDf96eK  
Dim aob, boc, cod, doa, sum As Single 9\Md.>  
  If ppx = p1x And ppy = p1y Then B7.<A#y2  
     point_in = True 3Yf~5csY  
     Exit Function PDpuHHB  
  End If zeshM8=  
  If ppx = p2x And ppy = p2y Then s|][p|  
     point_in = True KFBBqP  
     Exit Function G%fXHAs.+  
  End If KBDNK_7A  
   If ppx = p3x And ppy = p3y Then SaOOD-u  
     point_in = True cwE?+vB  
     Exit Function 5mX"0a_Q  
  End If e7yn"kd  
     D}rnpwp{  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) b63DD(  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 4N)45@jk[  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) O[8wF86R  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) =d$m@rc0r  
    sum = aob + boc + cod + doa W[LQ$uj  
    If 360.01 > sum And sum > 359.99 Then pmiC|F83!8  
       point_in = True  c`}YL4  
    Else HggINMG  
       point_in = False J;k8 a2$_  
    End If [5PQrf~M
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End Function

'得到点半径,得到交点坐标函数 Cy5M0{  
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() $'w>doUlA  
    '求得中心点坐标 }-@h H(  
Dim tt As String 2UMX%+ "J  
Dim rt(3) As Single !]MGIh#u  
    '判断是否平行 "d*-
k R  
   acx = p3x - p1x z>HM$n`YD  
   acy = p3y - p1y au+a7~0~  
   bdx = p4x - p2x \98|.EG  
   bdy = p4y - p2y +hIMfhF  
   If acx * bdy = acy * bdx Then ahR-^^'$  
      rt(0) = 0 1`9'.w+r  
      Exit Function loD:4e1  
   Else QSvgbjdE  
      '判断斜率存在否 #Wt1Ph_;  
      If p1x = p3x And p2x <> p4x Then } DjbVYH  
         tt = "ac_n_bd_y" Lw6}bB`}  
      ElseIf p1x <> p3x And p2x = p4x Then 17lc5#^L  
         tt = "ac_y_bd_n" U3pMv|b  
      ElseIf p1x <> p3x And p2x <> p4x Then DuRC1@e  
         tt = "ac_y_bd_y" RCMO?CBe  
      End If t x1(6V&l;  
    Select Case tt 2SYV2  
         Case "ac_n_bd_y" :+ AqY(Gz  
            'bd线段方程 Zb2.o5#}  
            k_bd = bdy / bdx w_#5Na}>d  
            b_bd = p2y - k_bd * p2x {W
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            p_x = p1x 4x$Ts %]  
            p_y = k_bd * p_x + b_bd WE&"W$0  
         Case "ac_y_bd_n" wTn"  
            'ac线段方程 mam(h{f$  
            k_ac = acy / acx +?Y(6$o  
            b_ac = p1y - k_ac * p1x b@[\+P] "  
            p_x = p2x {&h=  
            p_y = k_ac * p_x + b_ac G:;(,  
        Case "ac_y_bd_y" ;CA7
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           'ac，bd线段都要求 I z)~h>-F  
           k_ac = acy / acx ys9MV%*  
           b_ac = p1y - k_ac * p1x SA.,Q~_T7  
           k_bd = bdy / bdx ANd#m9(x  
           b_bd = p2y - k_bd * p2x HNV"'p;  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) +w+qTZyky  
           p_y = k_ac * p_x + b_ac Jek)`D  
        End Select `f%sq*O~  
      rt(1) = p_x xJ)vfo  
      rt(2) = p_y XD|vB+j\O  
     }"AGX  
'计算最大半径 nNcmL/
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   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) _"sFLe{  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) G `JXi/#`  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) lISu[{b?  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Sv03="&  
Dim bb(5) As Single M-NY&@Nj  
  bb(1) = rr1 9h'klaE(  
  bb(2) = rr2 z_en.  
  bb(3) = rr3 !e:HE/&>i  
  bb(4) = rr4 t5  
  nb = rr1
<utD&D8w  
For i = 1 To 4 @W*Zrc1NF  
    If nb <= bb(i) Then .p(~/MnO  
       nb = bb(i) %/=#8v4*  
    End If \S"YLRn"  
Next i #zc{N"!  
    rt(0) = Sqr(nb) 06vxsT@
 
    rr = rt() h
h"=|c  
  End If "K-2y^Dl  
         yX;v  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  yjbqby7  

{{?[b^  
有热压工艺方面的人才或者资料分享下； <|s9@;(I  
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 TB gD"i-  

高手真多！

楼主威武霸气.