[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： ]iV]7g8:  
*p{p.%Qs:  
aBAoSn  

关键点说几个： Es=G' au  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） t>[QW`EeP  
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 &9e  
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 P]+B}))  

以下是几个重要的函数： ?V`-z#y7  
1.判断点在区域中函数 o[;P@F  
2.计算夹角函数 XfcYcN  
3.转置函数 AD   
4.得到区域中心点，及区域半径函数 RE!WuLs0"  
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） |q4=*Xq  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ;(K/O?nrJ  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single AMrYT+1  
   cax = x2 - x1 tMLiG4 |7  
   cay = y2 - y1 MJX ny4n  
   cbx = x2 - x3 .#y#u={{l  
   cby = y2 - y3 x& _Y( bHA  
   mo_jj = cax * cbx + cay * cby WrP+n  
   mo_ca = Sqr(cax * cax + cay * cay) xWLZlUHEu  
   mo_cb = Sqr(cbx * cbx + cby * cby) :V(C+bm *  
   cos_acb = mo_jj / (mo_ca * mo_cb) /5 z+N(RFC  
   'ff_cos = cos_acb U<Oc&S{]*  
   If cos_acb >= 1 Then 2IJniS=[>  
   nn = 0 /CALXwL  
   ElseIf cos_acb <= -1 Then #>yOp
*  
   nn = 3.14159265258979 A^lm0[3q  
   Else x|Uwk=;X|s  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) |kmP#`P~  
   End If j&ti "|2\  
   'ff_angle = nn *6JA&zj0B  
   ff_angle = nn * 180 / 3.14159265258979 /Ey%aA4v  
End Function

'判断点在区域内函数 *v#V%_o  
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 \<I&utn  
Dim aob, boc, cod, doa, sum As Single NvzPZ9=@-  
  If ppx = p1x And ppy = p1y Then 5XT^K)'  
     point_in = True 7j|CWurvq  
     Exit Function 2KO`+
  
  End If x7B;\D#`i/  
  If ppx = p2x And ppy = p2y Then jhRr!  
     point_in = True ['>ZC3?"h  
     Exit Function ;/NC[:'$D  
  End If L=54uCv Q  
   If ppx = p3x And ppy = p3y Then Z<<=2Xl(  
     point_in = True [1GwcXr  
     Exit Function 4SUzR\  
  End If BN&)5M?Xt6  
     &qY]W=9uK  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 7r:&%?2:g  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) RKzO$T  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) z}}P+P/  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) {KDN|o+%  
    sum = aob + boc + cod + doa I[rR-4.F]  
    If 360.01 > sum And sum > 359.99 Then z\FBN=54z  
       point_in = True _KloX{a  
    Else Qu<6X@+5  
       point_in = False AP z"k?D0  
    End If 3AENY@*  
End Function

'得到点半径,得到交点坐标函数 7L:Eg  
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() $XcH
.z  
    '求得中心点坐标 WnGi;AGH=1  
Dim tt As String #|+4`Gf^  
Dim rt(3) As Single o%-KO? YW  
    '判断是否平行 |d~'X%b%  
   acx = p3x - p1x 67/\0mV:~  
   acy = p3y - p1y &2%|?f|  
   bdx = p4x - p2x }; 7I   
   bdy = p4y - p2y feS$)H9-  
   If acx * bdy = acy * bdx Then JXRU9`3)A  
      rt(0) = 0 k$5l kP.  
      Exit Function wWx{#!W  
   Else Yx,E5
}-  
      '判断斜率存在否 #mJRL[V5^  
      If p1x = p3x And p2x <> p4x Then 96;5  
         tt = "ac_n_bd_y" %hm
Rh~/&  
      ElseIf p1x <> p3x And p2x = p4x Then ]5@n`;&#.  
         tt = "ac_y_bd_n" $;
(@0UDE  
      ElseIf p1x <> p3x And p2x <> p4x Then H;<>uELie  
         tt = "ac_y_bd_y" :B=Gb8?  
      End If g/68& M  
    Select Case tt &:ZR% f  
         Case "ac_n_bd_y" <7)sS<I  
            'bd线段方程 *@^@7`W  
            k_bd = bdy / bdx aeNbZpFQ  
            b_bd = p2y - k_bd * p2x %=*|:v
 
            p_x = p1x 8kcMgCO  
            p_y = k_bd * p_x + b_bd OqRRf  
         Case "ac_y_bd_n" -Op^3WWyY  
            'ac线段方程 +-),E.  
            k_ac = acy / acx &N=vs  
            b_ac = p1y - k_ac * p1x tBJ4lb  
            p_x = p2x [\eVX`it  
            p_y = k_ac * p_x + b_ac %A3m%&(m&%  
        Case "ac_y_bd_y" {7DXSe4  
           'ac，bd线段都要求 G0Z5h  
           k_ac = acy / acx dg~lz80  
           b_ac = p1y - k_ac * p1x RhB)AUAj  
           k_bd = bdy / bdx !U}2YM J  
           b_bd = p2y - k_bd * p2x F =*4]O  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) KX;JX*)J  
           p_y = k_ac * p_x + b_ac 2[(~_VJ  
        End Select IUEpE9_  
      rt(1) = p_x zjow %  
      rt(2) = p_y x'\C'zeF  
     du~V=%9  
'计算最大半径 S[7^#O.)  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ig YYkt  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) NZZy^p&O  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) |,=^P`#%  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) : qK-Rku  
Dim bb(5) As Single |/xx**?  
  bb(1) = rr1 MCEHv}W  
  bb(2) = rr2 5oCg&aT  
  bb(3) = rr3 }wp/,\_ >  
  bb(4) = rr4
aaKf4}  
  nb = rr1 jDQ?b\^  
For i = 1 To 4 'nM4t  
    If nb <= bb(i) Then g-UCvY I  
       nb = bb(i) i
\^4EQ
  
    End If :2M&C+f[  
Next i K^@9\cl^  
    rt(0) = Sqr(nb) })70S8k  
    rr = rt() YU8]W%  
  End If g"|>^90  
         ?_bFe![q  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  jO&*E'pk  

3)W zX  
有热压工艺方面的人才或者资料分享下； esnq/  
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 PZusYeV8b  

高手真多！

楼主威武霸气.