[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： {b6| wQ\  
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关键点说几个： r==d^  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） .\XFhOsa  
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 /
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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 *;cvG?V  

以下是几个重要的函数： s^f7w  
1.判断点在区域中函数 m31l[e  
2.计算夹角函数 rlxZ,

]ul  
3.转置函数 dRj2%Q f  
4.得到区域中心点，及区域半径函数 4z<nJOEh[  
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） 9o
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6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 p>#sR4d>  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single pLYLHS`*  
   cax = x2 - x1 ;|qbz]t2(  
   cay = y2 - y1 l4Au{%j\  
   cbx = x2 - x3 M./1.k&@  
   cby = y2 - y3 Ei>.e
XUD5  
   mo_jj = cax * cbx + cay * cby P^(uS'j)+  
   mo_ca = Sqr(cax * cax + cay * cay) &{4KymB:  
   mo_cb = Sqr(cbx * cbx + cby * cby) :m]KVcF.  
   cos_acb = mo_jj / (mo_ca * mo_cb) {L'uuG\9U  
   'ff_cos = cos_acb Ml,~@} p  
   If cos_acb >= 1 Then zv.#9^/y  
   nn = 0 &=f] a  
   ElseIf cos_acb <= -1 Then n4XEyCrD  
   nn = 3.14159265258979 Vh?5  
   Else ZR]p7{8B  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) g)dKXsy(F  
   End If
+MR]h [  
   'ff_angle = nn cT21  
   ff_angle = nn * 180 / 3.14159265258979 J]W? Vvv  
End Function

'判断点在区域内函数 qrHCr:~  
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 DX0#q#  
Dim aob, boc, cod, doa, sum As Single 5Vc
~yMz  
  If ppx = p1x And ppy = p1y Then c( _R xLJ  
     point_in = True ffW-R)U|3  
     Exit Function 5Lm-KohT'  
  End If g& ou[_A  
  If ppx = p2x And ppy = p2y Then !c"EgP+  
     point_in = True G>edJPfQ  
     Exit Function bt
Ox\y}  
  End If lT?Vt`==~M  
   If ppx = p3x And ppy = p3y Then z? Iu;X  
     point_in = True HCKocL/]h  
     Exit Function _RNP_$a  
  End If XL/V>`E@  
     ,\-4
X  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) '/s/o]'sUd  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) dUQ)&Hv  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) i,zZJ=a$  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) }S"qU]>8a  
    sum = aob + boc + cod + doa 8U
zF*gS  
    If 360.01 > sum And sum > 359.99 Then w7E#mdW  
       point_in = True T|&u?  
    Else Cp?6vu|RA  
       point_in = False # uy^AC$  
    End If "r=p/"4D  
End Function

'得到点半径,得到交点坐标函数 +W/{UddeKU  
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() [s[!PlazX  
    '求得中心点坐标 F=?GV\Tw  
Dim tt As String iL<FFN~{  
Dim rt(3) As Single B~E>=85z  
    '判断是否平行 , {}S<^?]  
   acx = p3x - p1x
L'$({  
   acy = p3y - p1y gW?Hd/  
   bdx = p4x - p2x /!_FE+  
   bdy = p4y - p2y .kyes4Z  
   If acx * bdy = acy * bdx Then q&&uX-ez5W  
      rt(0) = 0 v+i==vxg  
      Exit Function 6o^O%:0g  
   Else #<@_mbQ@|K  
      '判断斜率存在否 lmIphOUoIw  
      If p1x = p3x And p2x <> p4x Then NA YwuE-`  
         tt = "ac_n_bd_y" uF{l`|b'  
      ElseIf p1x <> p3x And p2x = p4x Then [,Y;#;   
         tt = "ac_y_bd_n" Bw<$fT`  
      ElseIf p1x <> p3x And p2x <> p4x Then &?I3xzvK  
         tt = "ac_y_bd_y" 4<- E0  
      End If {qm5H7sL  
    Select Case tt djn<Oc`  
         Case "ac_n_bd_y" gF]IAZCi  
            'bd线段方程 r!^VCA  
            k_bd = bdy / bdx ug/P>0  
            b_bd = p2y - k_bd * p2x PWV+M@  
            p_x = p1x b%X<'8z9Z  
            p_y = k_bd * p_x + b_bd &m`@6\N(   
         Case "ac_y_bd_n" )7m.n%B!5V  
            'ac线段方程 )"Wy/P  
            k_ac = acy / acx mp0s>R  
            b_ac = p1y - k_ac * p1x QbYNL9%  
            p_x = p2x rm<`H(cT  
            p_y = k_ac * p_x + b_ac sDwE,f0h  
        Case "ac_y_bd_y" ;`
Sn66&  
           'ac，bd线段都要求 V.!z9AQ  
           k_ac = acy / acx 4)9Pgp:  
           b_ac = p1y - k_ac * p1x tbB.n  
           k_bd = bdy / bdx "VeNc,-nfQ  
           b_bd = p2y - k_bd * p2x (#Xgfb"S3  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) RRtOBrIedI  
           p_y = k_ac * p_x + b_ac #b1/2=PA  
        End Select "-Uqv@  
      rt(1) = p_x 'l1cuAP!+  
      rt(2) = p_y (DM8PtZg  
     `)H| &!wT  
'计算最大半径 ?YM0VB,y  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) UFE~6"t(  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 8WwLKZ}  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ,f .#-  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) LfsOGC  
Dim bb(5) As Single ,27=i>>  
  bb(1) = rr1 6w0r)  
  bb(2) = rr2 "; ?^gA  
  bb(3) = rr3 Bn Nu/02.=  
  bb(4) = rr4 mTa
^At"  
  nb = rr1 Bs-MoT!  
For i = 1 To 4 :5zO!~\  
    If nb <= bb(i) Then zQtx!k=  
       nb = bb(i) XOzZtt  
    End If c+u) C%g  
Next i -:V2Dsr6;  
    rt(0) = Sqr(nb) %U$%x  
    rr = rt() Lw{'mtm  
  End If &&n-$WEl  
         ~ [=2d a  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  }W k!):=y  

B>M@'  
有热压工艺方面的人才或者资料分享下； `>cBR,)r  
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 /__@a&9t  

高手真多！

楼主威武霸气.