[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： =TwV_Dro~  
t 0nGZ%`  

描述:请输入描述

图片:2.jpg

h,rGa\X~0  

关键点说几个： -gv@ .#N  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） T{{J' _s5L  
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 <!-8g!  
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 KFCuv15w,3  

以下是几个重要的函数： Gxy>aS3  
1.判断点在区域中函数 7==Uz?}C  
2.计算夹角函数 FOM~Uj  
3.转置函数 --Dw8FR9  
4.得到区域中心点，及区域半径函数 #fzvK+  
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） WFjNS'WI_  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 agM.-MK  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Kbg`
ZO*  
   cax = x2 - x1 l:z:tJ#(  
   cay = y2 - y1 ;=5V)1~i1;  
   cbx = x2 - x3 4)]g=-3  
   cby = y2 - y3 -EF(J  
   mo_jj = cax * cbx + cay * cby L<1"u.3Z`}  
   mo_ca = Sqr(cax * cax + cay * cay) cx_[Y  
   mo_cb = Sqr(cbx * cbx + cby * cby) 4CW/  
   cos_acb = mo_jj / (mo_ca * mo_cb) h<Yn0(.  
   'ff_cos = cos_acb \Y Cj/tG8  
   If cos_acb >= 1 Then *O)_D bj  
   nn = 0
>|o-&dk  
   ElseIf cos_acb <= -1 Then lqF{Y<l  
   nn = 3.14159265258979 K.*?\)&  
   Else ?\<2*sW [k  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) nbMH:UY,J  
   End If h$f/NSct2  
   'ff_angle = nn nxsQDw\hy  
   ff_angle = nn * 180 / 3.14159265258979 j<szQ%tJlI  
End Function

'判断点在区域内函数 Te[[x
hTyw  
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 htX'
bA  
Dim aob, boc, cod, doa, sum As Single >u*woNw(XM  
  If ppx = p1x And ppy = p1y Then _8 vxb  
     point_in = True MeQ(,irr^  
     Exit Function r?{Vqephz  
  End If B 0 K2Uw  
  If ppx = p2x And ppy = p2y Then D8m?`^Zz  
     point_in = True \CUxGyu  
     Exit Function 7KRc^ *pZs  
  End If $C9<{zX
 
   If ppx = p3x And ppy = p3y Then '8*gJ7]  
     point_in = True ~<v{CBq[  
     Exit Function 2}$Vi$ R  
  End If [O"i!AQ  
     s.=)p"pTd  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 2mu~hJ  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) yC+N18y?  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ;f=:~go  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) uqTOEHH7  
    sum = aob + boc + cod + doa eb9qg.9Z  
    If 360.01 > sum And sum > 359.99 Then &0(2Z^Z>fw  
       point_in = True sn5N9=\+T  
    Else +}mj6I  
       point_in = False 
KS*W<_I  
    End If `3pe\s  
End Function

'得到点半径,得到交点坐标函数 )z/j5tnvm  
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() wf|CE410  
    '求得中心点坐标 h@{@OAu?  
Dim tt As String =_^g]?5i  
Dim rt(3) As Single y*uL,WH  
    '判断是否平行 /3KEX{'@U  
   acx = p3x - p1x HS(
<wI  
   acy = p3y - p1y Z:T4Z}4N  
   bdx = p4x - p2x N..9N$+(  
   bdy = p4y - p2y zN2sipJS8  
   If acx * bdy = acy * bdx Then NA/+bgyuT>  
      rt(0) = 0 `&pb`P<`  
      Exit Function .*Hv^_  
   Else QO#ZQ~  
      '判断斜率存在否 h$ZF[Xbfe  
      If p1x = p3x And p2x <> p4x Then k;LENB2iv  
         tt = "ac_n_bd_y" ^
f<f&V  
      ElseIf p1x <> p3x And p2x = p4x Then t8?+yG;  
         tt = "ac_y_bd_n" _ORW'(:Z  
      ElseIf p1x <> p3x And p2x <> p4x Then Z:Kob b  
         tt = "ac_y_bd_y" zR{TW
k]  
      End If L"}@>&6  
    Select Case tt b]|7{yMV  
         Case "ac_n_bd_y" TS UN(_XGW  
            'bd线段方程 YmF`7W  
            k_bd = bdy / bdx <m@U`RFm  
            b_bd = p2y - k_bd * p2x %'g/4I  
            p_x = p1x Uj!L:u2b  
            p_y = k_bd * p_x + b_bd ^'
[|  
         Case "ac_y_bd_n" 7XR[`Tn9<  
            'ac线段方程 l  
            k_ac = acy / acx U{ahA  
            b_ac = p1y - k_ac * p1x ~)ByARao=  
            p_x = p2x Wq,UxMz  
            p_y = k_ac * p_x + b_ac pkk0?$l",  
        Case "ac_y_bd_y" O$&p<~  
           'ac，bd线段都要求 pAa{,,Qc  
           k_ac = acy / acx |=h>3Z=r!  
           b_ac = p1y - k_ac * p1x ko, u  
           k_bd = bdy / bdx E* lqCh  
           b_bd = p2y - k_bd * p2x %"KBX~3+Kj  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) mS%D" e  
           p_y = k_ac * p_x + b_ac UyF]gO  
        End Select [6/%ynlP  
      rt(1) = p_x =3( ZUV X  
      rt(2) = p_y ^3r2Q?d\  
     g8qN+Gg  
'计算最大半径 Q0 ^?jh  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) SQz>e  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) LXK+W
B/s  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 4Yn*q~f  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) %*s[s0$c  
Dim bb(5) As Single E4{^[=}  
  bb(1) = rr1 #v~5f;[AAs  
  bb(2) = rr2 u;Z~Px4]v  
  bb(3) = rr3 ?VzST }  
  bb(4) = rr4 Ur@'X-  
  nb = rr1 }2h~o~  
For i = 1 To 4 ZAiQofQ:2  
    If nb <= bb(i) Then J7l1-  
       nb = bb(i) GQ[\R&]q<  
    End If =)T5Y,+rJ  
Next i 35,SPR  
    rt(0) = Sqr(nb) s\ ~r 8  
    rr = rt() N*$Q(K  
  End If tZ6KU11O  
         h\20
  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  `2UzJ~  

>H?8?a D  
有热压工艺方面的人才或者资料分享下； tE- s/  
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 YW0UIO  

高手真多！

楼主威武霸气.