[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{Lp/z%r  
KpBOmXE  

描述:请输入描述

图片:2.jpg

a<0q%Ax  

关键点说几个： &OlX CxH  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） xw}rFY$  
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 -^)<FY\  
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 IgjPy5k  

以下是几个重要的函数： CIui9XNU  
1.判断点在区域中函数 LGw-cX #  
2.计算夹角函数 q:nUn?zB  
3.转置函数 \!hd|j?&6  
4.得到区域中心点，及区域半径函数 )Z/$;7]#  
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） !rs }83w!  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 {\`y)k 7  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Qn|8Ic` *  
   cax = x2 - x1 sPb}A$'  
   cay = y2 - y1 /NjBC[P  
   cbx = x2 - x3 </Y(4Xwf=  
   cby = y2 - y3 :Jf</uP_  
   mo_jj = cax * cbx + cay * cby k]C k%[d  
   mo_ca = Sqr(cax * cax + cay * cay) 8KN3|)  
   mo_cb = Sqr(cbx * cbx + cby * cby) s?s,wdp  
   cos_acb = mo_jj / (mo_ca * mo_cb) .%dGSDru  
   'ff_cos = cos_acb `\|@w@f|;  
   If cos_acb >= 1 Then l]~9BPsR  
   nn = 0 x4PzP  
   ElseIf cos_acb <= -1 Then S(U9Dlyarg  
   nn = 3.14159265258979  j'Jb+@W?  
   Else N34-z|"q  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) WVsj  
   End If ~N
PhVlT  
   'ff_angle = nn 00'SceL=`  
   ff_angle = nn * 180 / 3.14159265258979 IA&V?{OE@I  
End Function

'判断点在区域内函数 - f ^!R  
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 livKiX`  
Dim aob, boc, cod, doa, sum As Single wdf;LM  
  If ppx = p1x And ppy = p1y Then )iiaT~ ]  
     point_in = True D vvi)/<  
     Exit Function QZG<sZ0"  
  End If wkPjMmW+!  
  If ppx = p2x And ppy = p2y Then XN6$TNsD$  
     point_in = True s3m\  
     Exit Function UCjx   
  End If /;w(sU  
   If ppx = p3x And ppy = p3y Then '(C+qwdRv  
     point_in = True F!g1.49""  
     Exit Function Hc@_@G  
  End If 1ig*Xp[  
     ?>{u@tYL  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) #"~\/sb   
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) U?Dr0wD;[  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) <`"  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) u?fM.=/N  
    sum = aob + boc + cod + doa JFO,Q -y\  
    If 360.01 > sum And sum > 359.99 Then t_xK?``  
       point_in = True [zm@hxym  
    Else /n(0w`
 
       point_in = False wu eDedz\  
    End If DBsoa0w  
End Function

'得到点半径,得到交点坐标函数 I}o} #OJ  
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() {DKZ~  
    '求得中心点坐标 B+~ /-3  
Dim tt As String DiOd!8Y  
Dim rt(3) As Single zS
D_t  
    '判断是否平行 !~%DR~^`  
   acx = p3x - p1x ?B;7J7T  
   acy = p3y - p1y dmXfz D  
   bdx = p4x - p2x LTzdg >\oJ  
   bdy = p4y - p2y Ssz;d&93  
   If acx * bdy = acy * bdx Then mF~]P8  
      rt(0) = 0 |n tWMm:(  
      Exit Function #_S]\=N(  
   Else / [49iIzC  
      '判断斜率存在否 x:~XZX\mwH  
      If p1x = p3x And p2x <> p4x Then `?R{sNr.  
         tt = "ac_n_bd_y" 0M&n3s{5I  
      ElseIf p1x <> p3x And p2x = p4x Then #oa>Z.?_V  
         tt = "ac_y_bd_n" SPdEO3  
      ElseIf p1x <> p3x And p2x <> p4x Then wG7>2
*(  
         tt = "ac_y_bd_y" w.aEc}@(^  
      End If u0arJU_.)  
    Select Case tt 7]1a3Jk  
         Case "ac_n_bd_y" ^o _J0 ]m  
            'bd线段方程 Yb<:1?76L  
            k_bd = bdy / bdx h9imS\gfr  
            b_bd = p2y - k_bd * p2x :ChXzZ  
            p_x = p1x `Rfe*oAf  
            p_y = k_bd * p_x + b_bd ^yc8is'`  
         Case "ac_y_bd_n" PDw+Q  
            'ac线段方程 \xggIW.^0  
            k_ac = acy / acx psmDGSm,&  
            b_ac = p1y - k_ac * p1x 6Y\TVRR  
            p_x = p2x _+aR|AEC  
            p_y = k_ac * p_x + b_ac hGrX,.zj  
        Case "ac_y_bd_y" j2IK\~W?-  
           'ac，bd线段都要求 1;<Vr<.  
           k_ac = acy / acx d7r!<u&/  
           b_ac = p1y - k_ac * p1x WvJ:yUb2  
           k_bd = bdy / bdx oVZzvK(zR  
           b_bd = p2y - k_bd * p2x wE=I3E%  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) e~(e&4pb  
           p_y = k_ac * p_x + b_ac ;a@riPqx!  
        End Select f1'X<VA  
      rt(1) = p_x 9#hp]0S6  
      rt(2) = p_y O/Hj-u6&A  
     PPySOkmS3  
'计算最大半径 1Dhe! n#  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) xFThs,w  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) *tRsm
"}  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) \MmOI<Hd-  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 286r
eeN/e  
Dim bb(5) As Single EZ"i0u  
  bb(1) = rr1 . 70=xH  
  bb(2) = rr2 ~F,YBX  
  bb(3) = rr3 YuVlD/  
  bb(4) = rr4 Twd*HH  
  nb = rr1 ic!% }S?  
For i = 1 To 4 `@1e{?$  
    If nb <= bb(i) Then LprGsqr:  
       nb = bb(i) J!~kqNI  
    End If 1QD4
9)  
Next i =X5w=(&  
    rt(0) = Sqr(nb) LVdR,'lS  
    rr = rt() '-N5F  
  End If MS#*3Md&y  
         u tkdL4G}'  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  &#u\@Qze  

^jS1g*nrN  
有热压工艺方面的人才或者资料分享下； Hl(W'>*oL  
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 0<4'pO.6Hq  

高手真多！

楼主威武霸气.