[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： #nTzn2  
F|,_k%QP  
IQ$cLr-S  

关键点说几个： 6:Fb>|]*PY  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） q%g!TFMg  
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 G?p !*7N  
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 }XJA#@  

以下是几个重要的函数： ku8C#%.m3  
1.判断点在区域中函数 zWN<"[agc  
2.计算夹角函数 <_o).hE{  
3.转置函数 sbeS9vE  
4.得到区域中心点，及区域半径函数 ~Ox !7Lp  
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） .paKV"LJ  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 H ~VeY\:w  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ?M<q95pL  
   cax = x2 - x1 ~Av
B5  
   cay = y2 - y1 {IB}g:  
   cbx = x2 - x3 vYPZVqF_$  
   cby = y2 - y3 TJ_<21a  
   mo_jj = cax * cbx + cay * cby ktA5]f;  
   mo_ca = Sqr(cax * cax + cay * cay) %1oh+'ES F  
   mo_cb = Sqr(cbx * cbx + cby * cby) [}mx4i  
   cos_acb = mo_jj / (mo_ca * mo_cb) I_dO*k%l  
   'ff_cos = cos_acb #YiphR&  
   If cos_acb >= 1 Then ro%Jg  
   nn = 0 w \U?64  
   ElseIf cos_acb <= -1 Then ij=_h_nA  
   nn = 3.14159265258979 ;4MC/Q/  
   Else M:PEY*4H  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Bu]PNKIi  
   End If prk@uYCa =  
   'ff_angle = nn ^t2b`n60  
   ff_angle = nn * 180 / 3.14159265258979 F|wT']1Y  
End Function

'判断点在区域内函数 +~7x+6E  
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 w$evAPuz^  
Dim aob, boc, cod, doa, sum As Single ns&3Dh(IVP  
  If ppx = p1x And ppy = p1y Then )w_hbU_Pb&  
     point_in = True ~VKuRli|m  
     Exit Function |uIgZ|7[  
  End If YXlaE=9bn  
  If ppx = p2x And ppy = p2y Then %(X^GL  
     point_in = True 3nbTK3,  
     Exit Function !r#36kO  
  End If *-vH64e  
   If ppx = p3x And ppy = p3y Then sqv!,@*q  
     point_in = True 6N#0D2~^  
     Exit Function !^x;4@Ejm  
  End If 1)BIh~1{p  
     INRP@Cp1  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) _g]h \3  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 1G}\IK1+  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) &-c{  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) (R|_6[zy  
    sum = aob + boc + cod + doa d1>L&3HKx  
    If 360.01 > sum And sum > 359.99 Then [sXnB$  
       point_in = True +v)+ k  
    Else q&nEodv>+  
       point_in = False t!&p5wJ*Q  
    End If IQ $/|b/  
End Function

'得到点半径,得到交点坐标函数 k fY0u  
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() !E~czC\p6  
    '求得中心点坐标 W5(.Hub}  
Dim tt As String Q-}cB  
Dim rt(3) As Single u|sdQ  
    '判断是否平行 HXP/2&|JY  
   acx = p3x - p1x qM(@wFg  
   acy = p3y - p1y k0IztFyj:R  
   bdx = p4x - p2x G\B:i
yKl  
   bdy = p4y - p2y ehV}}1>O  
   If acx * bdy = acy * bdx Then G4,.kK  
      rt(0) = 0 ?hOvY)  
      Exit Function bqwn_=.  
   Else G7YBo4v  
      '判断斜率存在否 We@wN:  
      If p1x = p3x And p2x <> p4x Then @ [<B:Tqo  
         tt = "ac_n_bd_y" CPLsSv5  
      ElseIf p1x <> p3x And p2x = p4x Then KSR'X0'  
         tt = "ac_y_bd_n" gJJBRn{MI  
      ElseIf p1x <> p3x And p2x <> p4x Then |o#pd\  
         tt = "ac_y_bd_y" @
0D  
      End If a\xf\$Ym  
    Select Case tt 0[92&:c,  
         Case "ac_n_bd_y" {S"!c.  
            'bd线段方程 )P#xny2  
            k_bd = bdy / bdx %TDY &@i=  
            b_bd = p2y - k_bd * p2x I^?hVH  
            p_x = p1x )E}eK-Yu  
            p_y = k_bd * p_x + b_bd ,h},jkY4  
         Case "ac_y_bd_n" roNs~]6  
            'ac线段方程 @ 5V3I^  
            k_ac = acy / acx wF)g@cw  
            b_ac = p1y - k_ac * p1x 7xfN}iHG  
            p_x = p2x ?Vc/mO2X  
            p_y = k_ac * p_x + b_ac J8@7 5p9  
        Case "ac_y_bd_y" ?1]h5Uh[b  
           'ac，bd线段都要求 tWI%
P&b  
           k_ac = acy / acx n=%D}W  
           b_ac = p1y - k_ac * p1x d$PQb9Q+f  
           k_bd = bdy / bdx 2T-3rC)  
           b_bd = p2y - k_bd * p2x zxy/V^mu  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) SV
i{B*  
           p_y = k_ac * p_x + b_ac wmaj[e,h  
        End Select T-.Bof(?w  
      rt(1) = p_x |K'7BK_^J  
      rt(2) = p_y o(Q='kK  
     : G0^t
 
'计算最大半径 mO@S
l(9  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 0Rz",Mu>  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 'ExTnv ~  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) m8z414o  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) FfibR\dhY  
Dim bb(5) As Single 4FcY NJq  
  bb(1) = rr1 W-ol*
S  
  bb(2) = rr2 V w5@)l*f  
  bb(3) = rr3 .!Q?TSQ+{!  
  bb(4) = rr4 `E5vO1Pl  
  nb = rr1 FSyeDC^@  
For i = 1 To 4 e%v0EJ},  
    If nb <= bb(i) Then lKLb\F%  
       nb = bb(i) V6tUijz  
    End If #yR@.&P  
Next i )Zit6I  
    rt(0) = Sqr(nb) 8@BN6  
    rr = rt() S3Sn_zqG  
  End If F!&_  
         9 p`|~^X  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  sVJwe\!  

M<x W)R  
有热压工艺方面的人才或者资料分享下； , ,=7deR  
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 _LUTIqlvi  

高手真多！

楼主威武霸气.