[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： 7` &K=( .  
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描述:请输入描述

图片:2.jpg

:v=Yo  

关键点说几个： a6fMx~  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） _da>=^hFJ  
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 k~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 u-=%gx"Di  

以下是几个重要的函数： PSNfh7g  
1.判断点在区域中函数 }mzM'9JH  
2.计算夹角函数 g`k_o<'JC  
3.转置函数 7g[T#B'/x,  
4.得到区域中心点，及区域半径函数 8lh{ R
  
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） |]w0ytL>(2  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 >r6`bh [4  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single |f#~#Y2v  
   cax = x2 - x1 x|&A^hQ  
   cay = y2 - y1 -Zh`
h8gX
 
   cbx = x2 - x3 ,Y6Me+5B  
   cby = y2 - y3 +}@1X&v:  
   mo_jj = cax * cbx + cay * cby 21_>|EKp  
   mo_ca = Sqr(cax * cax + cay * cay) X`YAJG  
   mo_cb = Sqr(cbx * cbx + cby * cby) rZm|7A)i  
   cos_acb = mo_jj / (mo_ca * mo_cb) c;
C:$B7  
   'ff_cos = cos_acb : z*OAl"  
   If cos_acb >= 1 Then 4IuQQ  
   nn = 0 HdQd =q(  
   ElseIf cos_acb <= -1 Then qc;9{$?xV  
   nn = 3.14159265258979 Y;JV9{j  
   Else 8pp^ w  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Q5b~5a  
   End If #0V$KC*>  
   'ff_angle = nn B/hL  
   ff_angle = nn * 180 / 3.14159265258979 *J&XM[t  
End Function

'判断点在区域内函数 :d\ne  
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 |d =1|C%,  
Dim aob, boc, cod, doa, sum As Single bAS('R;4  
  If ppx = p1x And ppy = p1y Then MM8@0t'E  
     point_in = True f Glvx~  
     Exit Function GAG=4g  
  End If }#va#Nb(,  
  If ppx = p2x And ppy = p2y Then Y?G\@6  
     point_in = True B@XnHh5y  
     Exit Function O&h3=?O&B  
  End If b/65Q&g'  
   If ppx = p3x And ppy = p3y Then Ln-/ 9'^  
     point_in = True |eH>55 b  
     Exit Function g#b[-)Qx  
  End If rK 9  
     #'m&<g,  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) p!5=1$  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) k1Cx~Q)XC  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) lYEMrr!KQw  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) k/[*Wz$W  
    sum = aob + boc + cod + doa $=?1>zvF  
    If 360.01 > sum And sum > 359.99 Then qOOF]L9r%u  
       point_in = True I!'PvIyO  
    Else w;@DcX$]  
       point_in = False T4MB~5,i  
    End If g%z'#E97  
End Function

'得到点半径,得到交点坐标函数 f%r0K6p  
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() ={_.}   
    '求得中心点坐标 ' *hy!f]  
Dim tt As String JBX#U@k>I  
Dim rt(3) As Single FnkB z5D  
    '判断是否平行 0a<:.}  
   acx = p3x - p1x $@]tTz;b  
   acy = p3y - p1y cTpmklq  
   bdx = p4x - p2x 'nH/Z 84  
   bdy = p4y - p2y +bC-_xGuh  
   If acx * bdy = acy * bdx Then Tc{r;:'G<  
      rt(0) = 0 =apcMW(zn  
      Exit Function g-B~"tp  
   Else % H"A%  
      '判断斜率存在否 !YUMAp/  
      If p1x = p3x And p2x <> p4x Then ERSo&8  
         tt = "ac_n_bd_y" YbS$D  
      ElseIf p1x <> p3x And p2x = p4x Then ="%nW3e@  
         tt = "ac_y_bd_n" fwvPh&U&  
      ElseIf p1x <> p3x And p2x <> p4x Then ^(,qkq'u D  
         tt = "ac_y_bd_y" 'EF\=o)^Y  
      End If GS),rNBur  
    Select Case tt `LD#fg*  
         Case "ac_n_bd_y" C'~K amS  
            'bd线段方程 (`V  
            k_bd = bdy / bdx dOm`p W^  
            b_bd = p2y - k_bd * p2x V?KACYd@O  
            p_x = p1x I_vPGafMx  
            p_y = k_bd * p_x + b_bd B^4D`0G[4  
         Case "ac_y_bd_n" kz4d"bTb  
            'ac线段方程 ]7H ?  
            k_ac = acy / acx L`"PaIMz  
            b_ac = p1y - k_ac * p1x u$T`Bn  
            p_x = p2x z\iz6-\&y  
            p_y = k_ac * p_x + b_ac Z0yy<9q]2  
        Case "ac_y_bd_y" B(}u:[ b^S  
           'ac，bd线段都要求 _Ju@<V$  
           k_ac = acy / acx q:OSQ~U_  
           b_ac = p1y - k_ac * p1x DK2m(9/`3  
           k_bd = bdy / bdx Z<7FF}i  
           b_bd = p2y - k_bd * p2x ^Y mq<*X  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) "T>74bj_|Q  
           p_y = k_ac * p_x + b_ac ^T}6oUd  
        End Select Q)"L8v v  
      rt(1) = p_x ~(%TQY5  
      rt(2) = p_y }1EfyR  
     A0L&p(i  
'计算最大半径 f? sW^d;  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) \U^0E> d  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) " oWiQ{\IP  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) O0`k6$=6r  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) "wk~[>  
Dim bb(5) As Single P38D-fLq  
  bb(1) = rr1 d'1L#`?  
  bb(2) = rr2 `Qzga}`"]  
  bb(3) = rr3 x --buO  
  bb(4) = rr4 F"7dN*7  
  nb = rr1 L%D:gy9o  
For i = 1 To 4 5o2W[<%v  
    If nb <= bb(i) Then aBV{Xr~#(  
       nb = bb(i) d,"?tip/SX  
    End If 4JlB\8rc  
Next i $6
p_`LD0  
    rt(0) = Sqr(nb) }=kf52Am,}  
    rr = rt() 7_$Xt)Y{  
  End If nxzdg5A(w  
         xRZ9.
Agv_  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Kp") %p#  

&IGTCTBP  
有热压工艺方面的人才或者资料分享下； 1(C3;qlVD  
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 *@'4 A :A  

高手真多！

楼主威武霸气.