[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： eVw\v#gd  
Pz]bZPHn  
=tr1*s{  

关键点说几个： -Y*VgoK%  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 3
gb|x?  
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 )O,wRd>5  
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 H@V 7!d  

以下是几个重要的函数： pD"YNlB^  
1.判断点在区域中函数 KkEv#2n  
2.计算夹角函数 m9Ax\lf  
3.转置函数 mw_ E&v  
4.得到区域中心点，及区域半径函数 *n8%F9F  
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） P` #QGZ>  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 6SVqRD<`  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single tAjx\7IX  
   cax = x2 - x1 'B_\TU0 O  
   cay = y2 - y1 9Y/L?km_(  
   cbx = x2 - x3 in<}fAro6  
   cby = y2 - y3 cq*=|m0}Z  
   mo_jj = cax * cbx + cay * cby c"7j3/p  
   mo_ca = Sqr(cax * cax + cay * cay) ~]
BMrgn  
   mo_cb = Sqr(cbx * cbx + cby * cby) dt_e  
   cos_acb = mo_jj / (mo_ca * mo_cb) -?<4Og[^  
   'ff_cos = cos_acb 9GgA6#  
   If cos_acb >= 1 Then @wp4|G  
   nn = 0 \?DR s  
   ElseIf cos_acb <= -1 Then YD\]{,F|  
   nn = 3.14159265258979 ,m^;&&  
   Else ME^,'&  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) jij<yM8$g  
   End If ,Ol (piR  
   'ff_angle = nn F[saP0 *  
   ff_angle = nn * 180 / 3.14159265258979 '7*=`q{  
End Function

'判断点在区域内函数 Jq ]:<TQ  
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 W0XF~  
Dim aob, boc, cod, doa, sum As Single Kmz7c|  
  If ppx = p1x And ppy = p1y Then FJNF%a)x2I  
     point_in = True PXz
T6)  
     Exit Function j>Ag\@2ME  
  End If \}_Yd8  
  If ppx = p2x And ppy = p2y Then (\a6H2z8l  
     point_in = True (*\jbK
 
     Exit Function ~u87H?  
  End If N^w'Hw0  
   If ppx = p3x And ppy = p3y Then Q;u SWt<{  
     point_in = True ' GG=Ebt  
     Exit Function wmU0E/{9]  
  End If x;\wY'  
     S/[E8T"  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) %ZP+zhn}  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) /mM2M-  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 4~z?"  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) &<pKx!  
    sum = aob + boc + cod + doa q<#>HjC  
    If 360.01 > sum And sum > 359.99 Then ^Q+i=y{W  
       point_in = True Avlz=k1*  
    Else <spZ! #o  
       point_in = False Yw;D:Y(  
    End If r\`+R"  
End Function

'得到点半径,得到交点坐标函数 ]iNEw9  
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() fq[;%cr4  
    '求得中心点坐标 X>YsQrK(ig  
Dim tt As String J?UQJ&!@O  
Dim rt(3) As Single RP5+d  
    '判断是否平行 4)>FS'=  
   acx = p3x - p1x F}GPZ=T;  
   acy = p3y - p1y ] b9-k  
   bdx = p4x - p2x kql0J|P?  
   bdy = p4y - p2y ^D`v3d  
   If acx * bdy = acy * bdx Then 3bZIYF2@  
      rt(0) = 0 Wo~vhv$E  
      Exit Function l
7{oi!   
   Else /walu+]h  
      '判断斜率存在否 JO<wK  
      If p1x = p3x And p2x <> p4x Then ;Vik5)D2D  
         tt = "ac_n_bd_y" .\0isO  
      ElseIf p1x <> p3x And p2x = p4x Then >odbOi+X  
         tt = "ac_y_bd_n" %1 vsN-O}8  
      ElseIf p1x <> p3x And p2x <> p4x Then A\_|un%  
         tt = "ac_y_bd_y" vDl- "!G1  
      End If XdLCbY  
    Select Case tt r0d35
 
         Case "ac_n_bd_y" |tR
OL9b  
            'bd线段方程 rNjn~c  
            k_bd = bdy / bdx ?{w3|Ef&  
            b_bd = p2y - k_bd * p2x 'bld,Do6  
            p_x = p1x ,lA.C%4au~  
            p_y = k_bd * p_x + b_bd 6 5y+Z  
         Case "ac_y_bd_n" mbnV[  
            'ac线段方程 {!|}=45Z  
            k_ac = acy / acx r
qPFU6  
            b_ac = p1y - k_ac * p1x >>aq,pH  
            p_x = p2x )[mwP.T=  
            p_y = k_ac * p_x + b_ac r78TE@d  
        Case "ac_y_bd_y" \0lnxLA  
           'ac，bd线段都要求 >9RD_QG7  
           k_ac = acy / acx XNQAi (!GS  
           b_ac = p1y - k_ac * p1x +dA,P\  
           k_bd = bdy / bdx F:y[@Yn  
           b_bd = p2y - k_bd * p2x X#3et'  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) O+}qQNe<  
           p_y = k_ac * p_x + b_ac fwK}/0%  
        End Select VJ ^dY;  
      rt(1) = p_x fDG0BNLY  
      rt(2) = p_y 54 >-  
     moP,B~  
'计算最大半径 f2,jh}4  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 6[OzU2nB  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) *tm0R>?!  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ynA|}X  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) s'kDk2r  
Dim bb(5) As Single ?wnzTbJN  
  bb(1) = rr1 /-#I_>:8'  
  bb(2) = rr2 ?c0xRO%y  
  bb(3) = rr3 R+&jD;U{
 
  bb(4) = rr4 QWMdn  
  nb = rr1 hKzSgYxP=t  
For i = 1 To 4 hWH:wB  
    If nb <= bb(i) Then YZ%Hu)  
       nb = bb(i) TEDAb>  
    End If oh$Q6G  
Next i =0;^(/1Mc  
    rt(0) = Sqr(nb) NJNJjdD>  
    rr = rt() r#xg#uoj  
  End If #!)n {
h+  
         irN6g#B?  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  V<j.xd7  

65Cg]Dt71  
有热压工艺方面的人才或者资料分享下； *<J*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 |<GDUwC_;  

高手真多！

楼主威武霸气.