[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： yru}f;1  
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关键点说几个： 6>^k9cJp  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） im%3*bv-  
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 4E94W,1%,Y  
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 n]g,)m  

以下是几个重要的函数： -C]a2  
1.判断点在区域中函数 smS0Rk  
2.计算夹角函数 U6 R
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3.转置函数 OlFn<:V K  
4.得到区域中心点，及区域半径函数
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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） [Y~s  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 DgP%Q  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single QyQ8M1
m  
   cax = x2 - x1 xb;mm9H  
   cay = y2 - y1 1
r4/McB  
   cbx = x2 - x3 ~(S4/d5  
   cby = y2 - y3 pP&M]'  
   mo_jj = cax * cbx + cay * cby a06q-3zw  
   mo_ca = Sqr(cax * cax + cay * cay) xUoY|$fI  
   mo_cb = Sqr(cbx * cbx + cby * cby) C_)>VPD  
   cos_acb = mo_jj / (mo_ca * mo_cb) h!]A(T\J  
   'ff_cos = cos_acb g{(nt5|^l  
   If cos_acb >= 1 Then n-Y'LK40Os  
   nn = 0 `7ZJB$7D|*  
   ElseIf cos_acb <= -1 Then xnOlV  
   nn = 3.14159265258979 Z;s-t\C  
   Else b>WT-.b0  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) vL0Ol-Vt  
   End If 7F~+z7(h  
   'ff_angle = nn Y6a|\K|  
   ff_angle = nn * 180 / 3.14159265258979 tTt~W5lo  
End Function

'判断点在区域内函数 \9^@,kfP  
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 NBX/V^  
Dim aob, boc, cod, doa, sum As Single <ZEA&:p  
  If ppx = p1x And ppy = p1y Then TH &B9  
     point_in = True %|>i2  
     Exit Function L8Q!6oO=<  
  End If 79_MP  
  If ppx = p2x And ppy = p2y Then sP%.o7&n  
     point_in = True u!W00;`L  
     Exit Function XLT<,B}e  
  End If CS49M  
   If ppx = p3x And ppy = p3y Then rv:O|wZ  
     point_in = True $)!Z"2T  
     Exit Function rf@81Ds  
  End If TF>F7v(,45  
     4y]*"(sQ;  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) QR4o j  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ,PYe7c  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) |(5=4j]  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) p(Mv^ea  
    sum = aob + boc + cod + doa 3]acfCacC  
    If 360.01 > sum And sum > 359.99 Then XJ9>a-{  
       point_in = True |a+8-@-Tj  
    Else g=Lt2UIJ  
       point_in = False Qsa2iw{  
    End If z~qQ@u|  
End Function

'得到点半径,得到交点坐标函数 F+GQl  
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() rk|6!kry  
    '求得中心点坐标 M%/D:0  
Dim tt As String ^^m%[$nw&r  
Dim rt(3) As Single DWAU8>c+  
    '判断是否平行 /.r($Sg^  
   acx = p3x - p1x N@g+51ye  
   acy = p3y - p1y })B)-8  
   bdx = p4x - p2x Hi Yx(hY  
   bdy = p4y - p2y (ZYOm
  
   If acx * bdy = acy * bdx Then A.[T#ZB.4  
      rt(0) = 0 MEu-lM7v  
      Exit Function ;1KhUf;&F  
   Else (w*$~p  
      '判断斜率存在否 ="`y<J P  
      If p1x = p3x And p2x <> p4x Then ]zO]*d=m  
         tt = "ac_n_bd_y" ep5aBrN]"  
      ElseIf p1x <> p3x And p2x = p4x Then [kCn6\_<V  
         tt = "ac_y_bd_n" x{rt\OT  
      ElseIf p1x <> p3x And p2x <> p4x Then 04s N4C  
         tt = "ac_y_bd_y" \ys3&<;b  
      End If M
mX42;Pw  
    Select Case tt jV(IS
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         Case "ac_n_bd_y" #r1x0s40D  
            'bd线段方程 rP'oUV_  
            k_bd = bdy / bdx UJb7v:^  
            b_bd = p2y - k_bd * p2x qcK)J/K"  
            p_x = p1x xsfq[}eH<  
            p_y = k_bd * p_x + b_bd <^=k~7m  
         Case "ac_y_bd_n" -I -wdyDr  
            'ac线段方程 V1ug.Jv^  
            k_ac = acy / acx Z"n]y4h  
            b_ac = p1y - k_ac * p1x }5~;jN=k  
            p_x = p2x Z1Ms~tch  
            p_y = k_ac * p_x + b_ac E_
++yK^=  
        Case "ac_y_bd_y" }Eav@3h6  
           'ac，bd线段都要求 '@$?A>.cj  
           k_ac = acy / acx F?UL0Q|uv  
           b_ac = p1y - k_ac * p1x oR+Fn}mG  
           k_bd = bdy / bdx p'H5yg3h  
           b_bd = p2y - k_bd * p2x 7l?=$q>k"  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ?}W:DGudZ  
           p_y = k_ac * p_x + b_ac .8"o&%$`V  
        End Select (k[<>$hL*  
      rt(1) = p_x Z8m/8M  
      rt(2) = p_y n1H*][CK  
     o*<(,I%  
'计算最大半径 9(m^^  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ar6Z?v$  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) a@%FwfIu  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) qB8<(vBP+  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) zRe0z2  
Dim bb(5) As Single KmMt:^9  
  bb(1) = rr1 G",+jR]  
  bb(2) = rr2 n44j]+P  
  bb(3) = rr3 `aCcTs7~]p  
  bb(4) = rr4 pM>.z
9  
  nb = rr1 tvd/Y|bV=  
For i = 1 To 4 Ar|_UV>Zf  
    If nb <= bb(i) Then m^TkFt<BM  
       nb = bb(i) }+SnY8A=KZ  
    End If [P 8e=;  
Next i c0tv!PSw  
    rt(0) = Sqr(nb) vZ*593C8  
    rr = rt() +jHL==W&  
  End If p}C3<
[Nk  
         W{k}ogI;  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  t*~V]wZ  

YqrieDFay!  
有热压工艺方面的人才或者资料分享下； BH0].-)[y!  
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 z\{y[3-  

高手真多！

楼主威武霸气.