[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： 6\NX
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关键点说几个： 35]j;8N:  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） e]dPF[?7  
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 ft~|  
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 _rWM]  

以下是几个重要的函数： Q*mMF@-:  
1.判断点在区域中函数 )$9C`d[  
2.计算夹角函数 +[ZMrTW!0C  
3.转置函数 oneSgJ  
4.得到区域中心点，及区域半径函数 vJ'yz#tl
9  
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） -Z/6;2
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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 xRTg [  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 69<rsp(p  
   cax = x2 - x1 pT_e;,KW U  
   cay = y2 - y1 ![X.%  
   cbx = x2 - x3 kDceBs s  
   cby = y2 - y3 T`RQUJO  
   mo_jj = cax * cbx + cay * cby )z4kP09  
   mo_ca = Sqr(cax * cax + cay * cay) KH@) +Rj  
   mo_cb = Sqr(cbx * cbx + cby * cby) yoA*\V  
   cos_acb = mo_jj / (mo_ca * mo_cb) 3'
:[i2[  
   'ff_cos = cos_acb :+
gCO!9Y  
   If cos_acb >= 1 Then 0
=(-8vwd  
   nn = 0 00.iMmJ  
   ElseIf cos_acb <= -1 Then (X`t"*y"  
   nn = 3.14159265258979 tUAY]BJ*s  
   Else Ph!KL\  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ru6HnLhL  
   End If NkjQyMF  
   'ff_angle = nn |V~(mS747:  
   ff_angle = nn * 180 / 3.14159265258979 d)17r\*>I  
End Function

'判断点在区域内函数 |\r\i&|g1  
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 Q&U= jX  
Dim aob, boc, cod, doa, sum As Single (m =u;L"o  
  If ppx = p1x And ppy = p1y Then <4A(Z$ZX)  
     point_in = True `v/tf|v6  
     Exit Function /wCxf5q0  
  End If .*wjkirF#~  
  If ppx = p2x And ppy = p2y Then k9VQ6A  
     point_in = True @l6dJ  
     Exit Function B=RKi\K6a  
  End If !PP?2Ax  
   If ppx = p3x And ppy = p3y Then bl=*3qB  
     point_in = True MT#[ -M\  
     Exit Function s)&R W#:X  
  End If NYV0<z@M2M  
     G
}
hkr  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) |sZ9/G7  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) iNrmhiql  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) HIp {< M3  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) LM`tNZ1Fc!  
    sum = aob + boc + cod + doa V{aIhH>P  
    If 360.01 > sum And sum > 359.99 Then >5@ 0lYhH  
       point_in = True XuAc3~HAd  
    Else r Xk   
       point_in = False T6?d`i i1  
    End If 6`$z*C2{  
End Function

'得到点半径,得到交点坐标函数 Q^5 t]HKn  
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() Y?SJQhN6W  
    '求得中心点坐标 <qj@waKw4  
Dim tt As String =|t1eSzc  
Dim rt(3) As Single Vblf6qaBs  
    '判断是否平行 |P?B AWYeQ  
   acx = p3x - p1x #2t\>7]  
   acy = p3y - p1y B!C32~[  
   bdx = p4x - p2x Qz90 mb  
   bdy = p4y - p2y |8?{JKsg  
   If acx * bdy = acy * bdx Then OpX  
      rt(0) = 0 y&|{x "  
      Exit Function Yy:sZJ  
   Else 2F)OyE  
      '判断斜率存在否 HDG"a&$   
      If p1x = p3x And p2x <> p4x Then Y7I  
         tt = "ac_n_bd_y" Yy;1N{dbT  
      ElseIf p1x <> p3x And p2x = p4x Then ,UJPLj^  
         tt = "ac_y_bd_n" 6B P%&RL  
      ElseIf p1x <> p3x And p2x <> p4x Then F,$$N>  
         tt = "ac_y_bd_y" 8pKPbi;(2  
      End If IaqN@IlWb  
    Select Case tt :<G+)hIK  
         Case "ac_n_bd_y" T{2//$T?  
            'bd线段方程 pNme jz:  
            k_bd = bdy / bdx g(/O)G.  
            b_bd = p2y - k_bd * p2x =7Gi4X%  
            p_x = p1x 3JO:n6  
            p_y = k_bd * p_x + b_bd XSIO0ep  
         Case "ac_y_bd_n" Wl"fh_  
            'ac线段方程 H zK=UcD  
            k_ac = acy / acx m`6`a|Twp$  
            b_ac = p1y - k_ac * p1x )u:8Pv  
            p_x = p2x a'.=.eDQ  
            p_y = k_ac * p_x + b_ac _C\ d^a(  
        Case "ac_y_bd_y" SQCuY<mD  
           'ac，bd线段都要求 Hd}t=6  
           k_ac = acy / acx g5]DA.&(  
           b_ac = p1y - k_ac * p1x #!<s& f|O  
           k_bd = bdy / bdx Gs?sO?j  
           b_bd = p2y - k_bd * p2x G!Q)?N   
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ?AH<y/i<Y  
           p_y = k_ac * p_x + b_ac qt)mUq;>  
        End Select ?7dDQI7^(  
      rt(1) = p_x 3Sb%
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      rt(2) = p_y 3Q6
#m3AWY  
     r+obm)Qtp  
'计算最大半径 *Fs^T^ ?r  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 6H9]]Unju  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) .h }D%Qa  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) U;Wmx  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) z#!Cg*K(  
Dim bb(5) As Single ?Io2lFvI@Y  
  bb(1) = rr1 3@A k6Uh  
  bb(2) = rr2 ~~ w4854  
  bb(3) = rr3 V)@scB|>,  
  bb(4) = rr4 #@`^ .  
  nb = rr1 'S ;vv]}Gs  
For i = 1 To 4 *]k"H`JoFC  
    If nb <= bb(i) Then Yf9L~K  
       nb = bb(i) 3`I_  
    End If +{*&I DW  
Next i tt91)^GdYa  
    rt(0) = Sqr(nb) a_x6 v*  
    rr = rt()  ,1kV9_x  
  End If g==^ioS}*  
         L*38T\  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  <ZLs+|1  

VPuzu|  
有热压工艺方面的人才或者资料分享下； cD]t%`*  
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 qdhD6#r  

高手真多！

楼主威武霸气.