[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： k`U")lv  
Z;=G5O uvQ  
YwyP+Sr\  

关键点说几个： Ppi/`X  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） c""*Ng*T  
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 W~(@*
H  
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 =B<>H$  

以下是几个重要的函数： m}&cX
Y  
1.判断点在区域中函数 BH6)`0&2*N  
2.计算夹角函数 3fPd|F.kF  
3.转置函数 ya7PF~:E-  
4.得到区域中心点，及区域半径函数 CZ*#FY  
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） FeOo;|a  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 o zg%-  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Tk~RT<\Ab+  
   cax = x2 - x1 V6l~Aj}/  
   cay = y2 - y1 GP=i6I6C  
   cbx = x2 - x3 l{q$[/J~)  
   cby = y2 - y3 v`&  
   mo_jj = cax * cbx + cay * cby [MLJs-*   
   mo_ca = Sqr(cax * cax + cay * cay) #m>Rt~(,S  
   mo_cb = Sqr(cbx * cbx + cby * cby) &q~**^;'  
   cos_acb = mo_jj / (mo_ca * mo_cb) V)x(\ls]SX  
   'ff_cos = cos_acb O`Ht|@[6  
   If cos_acb >= 1 Then nADt8  
   nn = 0 [4qCW{x._  
   ElseIf cos_acb <= -1 Then "
>pW:apl%  
   nn = 3.14159265258979 vwy10PlqL  
   Else Arvxl(R\4  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) P$l-p'U-  
   End If 0LI:R'P+P[  
   'ff_angle = nn &?+vHE}  
   ff_angle = nn * 180 / 3.14159265258979 ! C}t)R]^  
End Function

'判断点在区域内函数 [h"#Gwb=;  
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 agQ5%t#  
Dim aob, boc, cod, doa, sum As Single }qf9ra  
  If ppx = p1x And ppy = p1y Then  $^&SEz  
     point_in = True Znl&.,c)  
     Exit Function @\~qXz{6J  
  End If NF?FEUoxz  
  If ppx = p2x And ppy = p2y Then }h+_kRQ  
     point_in = True B_f0-nKP  
     Exit Function qg7] YT&  
  End If
i&cH  
   If ppx = p3x And ppy = p3y Then {HgW9N(  
     point_in = True ZqI.n4:9  
     Exit Function G5^gwG+  
  End If "|1MJuY_6  
     @G/':N   
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) # SmM5%  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) +{%@kX<V_  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) %}z/_QZ  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 7ko7)"N  
    sum = aob + boc + cod + doa tE)%*z@<Lt  
    If 360.01 > sum And sum > 359.99 Then ETu7G5?  
       point_in = True 'pE %'8R  
    Else E)(`Z0  
       point_in = False MSEBvZ-  
    End If nMU#g])y)  
End Function

'得到点半径,得到交点坐标函数 'e6W$?z  
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() 0/.#V*KM  
    '求得中心点坐标 0XlX7Sk+  
Dim tt As String [7Nn%eZC  
Dim rt(3) As Single 39!o!_g  
    '判断是否平行 %EPqJ(T  
   acx = p3x - p1x YY
I  
   acy = p3y - p1y Q^Ln`zMe  
   bdx = p4x - p2x nf< <]iHf  
   bdy = p4y - p2y (PYUfiOf  
   If acx * bdy = acy * bdx Then S(A0),  
      rt(0) = 0 zIbl[[M&  
      Exit Function ;{|a~e?Y  
   Else Q6S[sTKR  
      '判断斜率存在否 f{e*R#+&  
      If p1x = p3x And p2x <> p4x Then @ ADY?  
         tt = "ac_n_bd_y" V,qZF=}S  
      ElseIf p1x <> p3x And p2x = p4x Then ;U<)$5  
         tt = "ac_y_bd_n" tC+9W1o  
      ElseIf p1x <> p3x And p2x <> p4x Then .Jdw:  
         tt = "ac_y_bd_y" Fm}O,=  
      End If K. G#[  
    Select Case tt /3%]Ggwe  
         Case "ac_n_bd_y" *9^CgLF  
            'bd线段方程
SX}GKu  
            k_bd = bdy / bdx "sFdr
XJ  
            b_bd = p2y - k_bd * p2x whNRUOK:  
            p_x = p1x ;J\{r$q  
            p_y = k_bd * p_x + b_bd )<.S3  
         Case "ac_y_bd_n" )ymF:]QC  
            'ac线段方程 ./<3jf :  
            k_ac = acy / acx HkvCQH  
            b_ac = p1y - k_ac * p1x 0jv9N6IM  
            p_x = p2x if5Y!Tx?G  
            p_y = k_ac * p_x + b_ac >1ZMQgCG  
        Case "ac_y_bd_y" *Oz
5I  
           'ac，bd线段都要求 17D167\X  
           k_ac = acy / acx MbnV5b:X  
           b_ac = p1y - k_ac * p1x ;_j\E(^%  
           k_bd = bdy / bdx ;$i9gP[|m  
           b_bd = p2y - k_bd * p2x E08AZOY&g  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) dab>@z4  
           p_y = k_ac * p_x + b_ac 3:Co K#  
        End Select e;3$7$n Pv  
      rt(1) = p_x ,h/0:?R KW  
      rt(2) = p_y b&~uK"O'7d  
     {>FA ~}cX.  
'计算最大半径 2|}p&~G(  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Q\=u2}/z0  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) D~f.)kkC4  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) =X&h5;x'  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) MPzqw)_-v  
Dim bb(5) As Single rvE!Q=y~  
  bb(1) = rr1 N#.IpY'7Ze  
  bb(2) = rr2 P>N\q
  
  bb(3) = rr3 `*oLEX
YN  
  bb(4) = rr4 LR)is  
  nb = rr1 `"ie57-  
For i = 1 To 4 ^J% w[FE  
    If nb <= bb(i) Then SgXXitg9+  
       nb = bb(i) zm8m J2s  
    End If z5'VsK:  
Next i xC;$/u%'  
    rt(0) = Sqr(nb) TaolX*$5  
    rr = rt() )%j)*Ymz;  
  End If i0AC.]4e"  
         O1#rCFC|y  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  E<4}mSn)  

t&uHn5  
有热压工艺方面的人才或者资料分享下； ;Dgp !*v=  
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 0q;] ;m  

高手真多！

楼主威武霸气.