[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： OgC,oj,!/  
?nbu`K6T  

描述:请输入描述

图片:2.jpg

La'6k  

关键点说几个：
YVgH[-`,  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） s2|.LmC3|B  
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 =7H\llL4BC  
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 3c,4 wyn  

以下是几个重要的函数： &oHr]=xA  
1.判断点在区域中函数 m;{HlDez  
2.计算夹角函数 rXMc0SPk  
3.转置函数 IO 0n
T  
4.得到区域中心点，及区域半径函数 p_&B+ <z  
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） f+s)A(?3  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 71P. 9Iz  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Q%?%zuU  
   cax = x2 - x1 s[h;9 I1w  
   cay = y2 - y1 uM\\(g}  
   cbx = x2 - x3 Kg>B$fBx)  
   cby = y2 - y3 XXA'B{@Y)  
   mo_jj = cax * cbx + cay * cby !> +Lre@  
   mo_ca = Sqr(cax * cax + cay * cay) 5EI"5&`*  
   mo_cb = Sqr(cbx * cbx + cby * cby) +2 oZML  
   cos_acb = mo_jj / (mo_ca * mo_cb) $V?sD{=W  
   'ff_cos = cos_acb RfD#/G3|  
   If cos_acb >= 1 Then W% Lrp{  
   nn = 0 VWK/(>TP  
   ElseIf cos_acb <= -1 Then F}meKc?a  
   nn = 3.14159265258979 u1u;
aG  
   Else {fl[BX]kZ  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) &1^~G0Rh\  
   End If Z`GEF|eh  
   'ff_angle = nn %@)q=*=y  
   ff_angle = nn * 180 / 3.14159265258979 iM:-750n/  
End Function

'判断点在区域内函数 \eQPvkx2  
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 A=|a!N/  
Dim aob, boc, cod, doa, sum As Single G"u4]!$/  
  If ppx = p1x And ppy = p1y Then mSu$1m8  
     point_in = True *)^ZUk  
     Exit Function g +gcH  
  End If 3PRU  
  If ppx = p2x And ppy = p2y Then ip{b*@K  
     point_in = True
lnjs{`^  
     Exit Function tq'hiS(b  
  End If z4(\yx  
   If ppx = p3x And ppy = p3y Then Wrp+B[{r\  
     point_in = True T>#~.4A0  
     Exit Function rZ-< Ryg  
  End If }.9a!/@Aj  
     qyKR]%yzi  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 4Jc~I  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) MwSfuP  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 7iM@BeIf  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) Q7v1xBM  
    sum = aob + boc + cod + doa  g;AW  
    If 360.01 > sum And sum > 359.99 Then 09Eg ti.  
       point_in = True P()W\+",n  
    Else 2
MYez>D  
       point_in = False y,`0f|  
    End If E U RKzJk  
End Function

'得到点半径,得到交点坐标函数 N;!!*
3a9=  
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() KXcRm)  
    '求得中心点坐标 bi@'m?XwJ  
Dim tt As String !lsa5w{  
Dim rt(3) As Single 4u41M,nJQd  
    '判断是否平行 N,VI55J:y>  
   acx = p3x - p1x -Ks)1w>l
 
   acy = p3y - p1y tr/.pw6  
   bdx = p4x - p2x -*T0Cl.  
   bdy = p4y - p2y ]{+Y!tD  
   If acx * bdy = acy * bdx Then *(]ZdB_2  
      rt(0) = 0 q?]KZ_a  
      Exit Function .V_5q:tu  
   Else QpoC-4F  
      '判断斜率存在否 K g.O2F77  
      If p1x = p3x And p2x <> p4x Then 7'{Vh{.  
         tt = "ac_n_bd_y" #NL'r99D/o  
      ElseIf p1x <> p3x And p2x = p4x Then TPKD'@:x  
         tt = "ac_y_bd_n" uocFOlU0n  
      ElseIf p1x <> p3x And p2x <> p4x Then }K,3SO(:  
         tt = "ac_y_bd_y" r5(efTgAd+  
      End If DZH2U+K  
    Select Case tt 1Id"|/b%$  
         Case "ac_n_bd_y" swJQwY  
            'bd线段方程 $cm9xW&  
            k_bd = bdy / bdx Wy/h"R\=  
            b_bd = p2y - k_bd * p2x \GioSg  
            p_x = p1x a gL@A  
            p_y = k_bd * p_x + b_bd mC(YO y  
         Case "ac_y_bd_n" EaL>~:j  
            'ac线段方程 {/aHZ<I&^h  
            k_ac = acy / acx 01RW|rN  
            b_ac = p1y - k_ac * p1x {9XNh[NbP  
            p_x = p2x I};*O6D`  
            p_y = k_ac * p_x + b_ac +/M%%:>mY  
        Case "ac_y_bd_y" ;3bUgI}.J  
           'ac，bd线段都要求 u'DpZ  
           k_ac = acy / acx [io|qLr}\  
           b_ac = p1y - k_ac * p1x ;$4&Qp:#  
           k_bd = bdy / bdx R)isWw4  
           b_bd = p2y - k_bd * p2x 0&2`)W?9  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) Xi\c>eALO  
           p_y = k_ac * p_x + b_ac SdnO#J}{  
        End Select 0B}2~}#  
      rt(1) = p_x }*qj,8-9  
      rt(2) = p_y
IAe/)  
     G!%8DX5  
'计算最大半径 C'Y2kb  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) !<~cjgdx  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) /J&DYxl":  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) b8vZ^8tBV  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) fl2XI=[v4  
Dim bb(5) As Single E2>+V{TF  
  bb(1) = rr1 /Ah&d@b  
  bb(2) = rr2 N&Ho$,2s  
  bb(3) = rr3 0O*kC43E_  
  bb(4) = rr4 n;>=QG -v  
  nb = rr1 9ZY,T]ym?  
For i = 1 To 4 9zIqSjos"  
    If nb <= bb(i) Then P4/~_$e  
       nb = bb(i) %so{'rQl  
    End If A&WC})H5  
Next i E7aG&K  
    rt(0) = Sqr(nb) =1,1}OucP  
    rr = rt() ev_'.t'  
  End If kBoQjOV`  
         ~gNFcJuy  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  0.w7S6v|&  

n_9Ex&?e  
有热压工艺方面的人才或者资料分享下； nw%`CnzT  
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 2{vAs  

高手真多！

楼主威武霸气.