[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： ]n _-
  
Wey-nsk  

描述:请输入描述

图片:2.jpg

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关键点说几个： g"(N_sv?  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） pr;<n\Y{  
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 D'fP2?3FK  
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 'x+0 yd  

以下是几个重要的函数： Xuh_bW&zF  
1.判断点在区域中函数 *n}9_V%  
2.计算夹角函数 B
|:{.U@ne  
3.转置函数 2-j|q6m5  
4.得到区域中心点，及区域半径函数 R#Bt!RNZ  
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） :&?#~NFH  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 {dMa&r|lp  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single CvbY2_>Nh  
   cax = x2 - x1 2mU}"gf[  
   cay = y2 - y1 u52;)"&=)  
   cbx = x2 - x3 Qbv)(&i#~  
   cby = y2 - y3 (]7@0d88  
   mo_jj = cax * cbx + cay * cby p-*BB_J"  
   mo_ca = Sqr(cax * cax + cay * cay) M\`6H8aLn  
   mo_cb = Sqr(cbx * cbx + cby * cby) |I OTW=>  
   cos_acb = mo_jj / (mo_ca * mo_cb) 3g-}k  
   'ff_cos = cos_acb D"^ogY#LK  
   If cos_acb >= 1 Then V{d"cs>9  
   nn = 0 i3e|j(Gs4  
   ElseIf cos_acb <= -1 Then >$R-:>~zN  
   nn = 3.14159265258979 P92:}" )*>  
   Else cq[}>5*k  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 3>L1}zyM]  
   End If p%3';7W\  
   'ff_angle = nn //wmJ |  
   ff_angle = nn * 180 / 3.14159265258979 xHD!8B)  
End Function

'判断点在区域内函数 7kJ,;30)  
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 0hN
c#x6  
Dim aob, boc, cod, doa, sum As Single 2l\Oufer"  
  If ppx = p1x And ppy = p1y Then K} ;uH,  
     point_in = True X;6X K$"  
     Exit Function GbL,k?ey  
  End If 7gJy xQ  
  If ppx = p2x And ppy = p2y Then GGLVv)  
     point_in = True wkIH<w|jb  
     Exit Function aX~iY ~?_  
  End If [6/%ynlP  
   If ppx = p3x And ppy = p3y Then =3( ZUV X  
     point_in = True nZ%<2  
     Exit Function Q7DkhKT  
  End If Wg$MKc9Vy[  
     D!@c,H  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) DAvAozM  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Wo2M}]0  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Y.}n,y|J}  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) (TY^ kySr  
    sum = aob + boc + cod + doa kwyvd`J8  
    If 360.01 > sum And sum > 359.99 Then xknP `T  
       point_in = True wiFckF/  
    Else L^0jyp  
       point_in = False T %cN(0@  
    End If U#Z}a d?VX  
End Function

'得到点半径,得到交点坐标函数 _y8)jD"  
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() "0]i4d1l  
    '求得中心点坐标 :ox+WY  
Dim tt As String 7d9%L}+q  
Dim rt(3) As Single GbM
SO  
    '判断是否平行 WJg?R^  
   acx = p3x - p1x >Vg<J~[
g  
   acy = p3y - p1y l9SbuT$U  
   bdx = p4x - p2x (IEtjv}D  
   bdy = p4y - p2y EmH2 Dbw  
   If acx * bdy = acy * bdx Then \6sp"KqP  
      rt(0) = 0 P [gqv3V  
      Exit Function ,rG$JCS'KQ  
   Else ]^.#d   
      '判断斜率存在否 7[8PSoo  
      If p1x = p3x And p2x <> p4x Then ft$/-;  
         tt = "ac_n_bd_y" ^(a%B  
      ElseIf p1x <> p3x And p2x = p4x Then Z!ub`coV[  
         tt = "ac_y_bd_n" QZd ,GY5{  
      ElseIf p1x <> p3x And p2x <> p4x Then 4wK!)Pwq  
         tt = "ac_y_bd_y" e&wWlB![  
      End If Mb+cXdZb
 
    Select Case tt :PjHsNp;^  
         Case "ac_n_bd_y" 0A|.ch  
            'bd线段方程 -,p(PK  
            k_bd = bdy / bdx QDyL0l{C  
            b_bd = p2y - k_bd * p2x jMZ{>l.v  
            p_x = p1x a[t2TjB  
            p_y = k_bd * p_x + b_bd vu1F  
         Case "ac_y_bd_n" 4egq Y0A  
            'ac线段方程 Z.rKV}yjY  
            k_ac = acy / acx ]X{LZYk  
            b_ac = p1y - k_ac * p1x ]3C7guWz  
            p_x = p2x UB=I>  
            p_y = k_ac * p_x + b_ac NbfV6$jo  
        Case "ac_y_bd_y" 3;#v$F8R  
           'ac，bd线段都要求 Cg-khRgLS  
           k_ac = acy / acx /Wk\6  
           b_ac = p1y - k_ac * p1x q(_pk&/  
           k_bd = bdy / bdx Z9TG/C,eo  
           b_bd = p2y - k_bd * p2x _kgw+NA&-H  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) qifX7AXHr  
           p_y = k_ac * p_x + b_ac 8g&uCv/Uk  
        End Select s8eFEi  
      rt(1) = p_x nKufVe  
      rt(2) = p_y K^w(WE;db  
     t|d9EC]c(  
'计算最大半径  sy#CR4X  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) `0Qzu\gRb  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Oe*emUX7  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) kW5g]Q  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) >STWt>s  
Dim bb(5) As Single G'Jsk4:c  
  bb(1) = rr1 {_l@ws  
  bb(2) = rr2 X>=`{JS1  
  bb(3) = rr3 #(T  
  bb(4) = rr4 1Y\g{A"  
  nb = rr1 /J8y[aa  
For i = 1 To 4 z4{H=  
    If nb <= bb(i) Then WFULQQ*  
       nb = bb(i) Mb uD8B  
    End If Z6A*9m  
Next i 8"Hy'JA$O  
    rt(0) = Sqr(nb) 6Jrh'6o@  
    rr = rt() BUuNI_?M#5  
  End If |Fm(  
         Ztr,v$  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  e[.c^Hw  

A[`c2v-hF  
有热压工艺方面的人才或者资料分享下； 2oyTS*2u_&  
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 FR&4i" +  

高手真多！

楼主威武霸气.