[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： #Rs5W  
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e6 <9`Xg  

关键点说几个： ,E%O_:}R  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 8NNs_~+x}  
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 ?y"M>#  
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 <4zSh3  

以下是几个重要的函数： JIYzk]Tj  
1.判断点在区域中函数 c7[Ba\Cr4h  
2.计算夹角函数 *<"{(sAvk  
3.转置函数 f|/ ,eP$  
4.得到区域中心点，及区域半径函数 Qs#;sy W@~  
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） i]@k'2N  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ,I]]52+?4  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ]F;1l3I-  
   cax = x2 - x1 6g#E/{kQw  
   cay = y2 - y1 F|oyrG  
   cbx = x2 - x3 TT#V'r\  
   cby = y2 - y3 <*/Z>Z_c2  
   mo_jj = cax * cbx + cay * cby k;SKQN  
   mo_ca = Sqr(cax * cax + cay * cay) pu?COA  
   mo_cb = Sqr(cbx * cbx + cby * cby) 3Q7PY46  
   cos_acb = mo_jj / (mo_ca * mo_cb) "&;X/~j  
   'ff_cos = cos_acb e5;YY  
   If cos_acb >= 1 Then y
4=T0[ V  
   nn = 0 Q]RE,ZZ  
   ElseIf cos_acb <= -1 Then 5'w&M{{9  
   nn = 3.14159265258979 VyNU<}  
   Else (hKjr1s  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) c]
$$ap  
   End If 9U )9u["DH  
   'ff_angle = nn }6{00er  
   ff_angle = nn * 180 / 3.14159265258979 z?UEn#E2
 
End Function

'判断点在区域内函数 [`bK {Dq2  
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 (VHPcoL  
Dim aob, boc, cod, doa, sum As Single )}_}D+2  
  If ppx = p1x And ppy = p1y Then :gRVa=}=  
     point_in = True  >Af0S;S  
     Exit Function ol {N^fiK  
  End If ?UeV5<TewS  
  If ppx = p2x And ppy = p2y Then -0NkAQrg  
     point_in = True d+0= a]  
     Exit Function !i@A}$y  
  End If A4KkX  
   If ppx = p3x And ppy = p3y Then Uw3wR!:  
     point_in = True @2_E9{T  
     Exit Function 23Q 88z  
  End If [W3sveqj&  
     =fB"T+  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) $_\x}`c~.  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) `v2Xp3o4f  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) "%_T7A ![  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 2l:cP2fa  
    sum = aob + boc + cod + doa A2P.5EN  
    If 360.01 > sum And sum > 359.99 Then Q0ba;KPm  
       point_in = True N'pYz0_H  
    Else KAu>U3\/  
       point_in = False |S:erYE,G  
    End If iYlkc  
End Function

'得到点半径,得到交点坐标函数 {yd(n_PqY  
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() ]kO|kIs  
    '求得中心点坐标 O+[s4]  
Dim tt As String (/{bJt~b  
Dim rt(3) As Single BV}sN{  
    '判断是否平行 kcMg`pJ4<  
   acx = p3x - p1x nm%7e!{m  
   acy = p3y - p1y Z4gn7 'V  
   bdx = p4x - p2x 8-@HzS%  
   bdy = p4y - p2y 7fl{<uf  
   If acx * bdy = acy * bdx Then KUHkjA_  
      rt(0) = 0 8{6`?qst@  
      Exit Function W
B `h)  
   Else [N"=rY4G  
      '判断斜率存在否 !>GDp>0  
      If p1x = p3x And p2x <> p4x Then BD]o+96qP  
         tt = "ac_n_bd_y" {V8uk
$  
      ElseIf p1x <> p3x And p2x = p4x Then >Y|P+Z\7  
         tt = "ac_y_bd_n" j}fSz)`i  
      ElseIf p1x <> p3x And p2x <> p4x Then }n"gX>e~  
         tt = "ac_y_bd_y" )Z\Zw~L  
      End If s E;2;2u"  
    Select Case tt 82o|(pw  
         Case "ac_n_bd_y" nu2m5RYx  
            'bd线段方程 E#!.;AQ  
            k_bd = bdy / bdx vw-y:,5`t8  
            b_bd = p2y - k_bd * p2x 
z&jASL  
            p_x = p1x ob|^lAU  
            p_y = k_bd * p_x + b_bd O]61guxro  
         Case "ac_y_bd_n" 6#
a82_  
            'ac线段方程 Ua~8DdW  
            k_ac = acy / acx I\IDt~  
            b_ac = p1y - k_ac * p1x 'rVB2 `z-  
            p_x = p2x D/,(xWaT  
            p_y = k_ac * p_x + b_ac <KE%|6oER  
        Case "ac_y_bd_y" C@pn4[jTl  
           'ac，bd线段都要求 pkTVQdtRG  
           k_ac = acy / acx 0+.<BOcW5  
           b_ac = p1y - k_ac * p1x JcfGe4  
           k_bd = bdy / bdx i8f+woZL  
           b_bd = p2y - k_bd * p2x IfY?P(P  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) XdnpL$0  
           p_y = k_ac * p_x + b_ac TFzk5  
        End Select =T)y(] ;M$  
      rt(1) = p_x J.O{+{&cd  
      rt(2) = p_y HJd{j,M  
     ZQ'|B  
'计算最大半径 !HeQMz  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) XK;Vu#E*^  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) D'^UZZlI^I  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Tz0XBH_  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ",aEN=+|hV  
Dim bb(5) As Single w?Cho</Xu  
  bb(1) = rr1 *Y!RU{w+Z  
  bb(2) = rr2 - Nt8'-  
  bb(3) = rr3 Zb'a+8[  
  bb(4) = rr4 _@g\.7@0G  
  nb = rr1 !JVv`YN  
For i = 1 To 4 }VHvC"  
    If nb <= bb(i) Then cyh;1Q
 
       nb = bb(i) ][XCpJ)8  
    End If I$XwM  
Next i 5'<mfY'B  
    rt(0) = Sqr(nb) %MCS_'N J  
    rr = rt() t[AA=  
  End If q%,y66pFr  
         ;hh.w??  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ?.c:k;j  

|;"(C# B  
有热压工艺方面的人才或者资料分享下； >GmO8dK  
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 n8FIxl&u  

高手真多！

楼主威武霸气.