[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： 4C`p`AQqpQ  
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关键点说几个： 'I5~<"E  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） -(l/.yE{X  
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 }J(o!2.  
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 5sguv^;C5  

以下是几个重要的函数： |>jlm
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1.判断点在区域中函数 +~!\;71:f  
2.计算夹角函数 Rd>PE=u  
3.转置函数 ibv.M=  
4.得到区域中心点，及区域半径函数 ILMXWw  
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）  d>}R3T  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 q.
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Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Ncsk~=[  
   cax = x2 - x1 FiW>kTM8  
   cay = y2 - y1 7MhN>a;A\  
   cbx = x2 - x3 2sOetmWE7  
   cby = y2 - y3 _p,1m[&M  
   mo_jj = cax * cbx + cay * cby ;SVA
ar4r  
   mo_ca = Sqr(cax * cax + cay * cay) iYBp"+#2  
   mo_cb = Sqr(cbx * cbx + cby * cby) O+*<^*YyD  
   cos_acb = mo_jj / (mo_ca * mo_cb) >%Nqgn$V  
   'ff_cos = cos_acb ~-K<gT/  
   If cos_acb >= 1 Then ^K`Vqo  
   nn = 0 IM*T+iRKqF  
   ElseIf cos_acb <= -1 Then c
^%&-],  
   nn = 3.14159265258979 :?J0e4.]  
   Else Lk:Sju  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) y-k]Tr  
   End If pjrzoMF  
   'ff_angle = nn O&ZVu>`g  
   ff_angle = nn * 180 / 3.14159265258979 {[$JiljD  
End Function

'判断点在区域内函数 $zYo~5M?i-  
Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean ?^3Q5ye  
Dim aob, boc, cod, doa, sum As Single V{+5Fas^l  
  If ppx = p1x And ppy = p1y Then mmx;Vt$i  
     point_in = True j/*4Wj[  
     Exit Function #Ss lH  
  End If +VdC g_  
  If ppx = p2x And ppy = p2y Then t?6_^ 08  
     point_in = True r8Pdk/CW^  
     Exit Function `8<h aU  
  End If } D0Y8  
   If ppx = p3x And ppy = p3y Then hB 36o9|9  
     point_in = True JtGBNz!"  
     Exit Function tG}cmK~%  
  End If >+E   
     aK4ZH}XHE"  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Gp5[H}8
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    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) /%9CR'%*c  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) )EptyH  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) dPO|x+N,  
    sum = aob + boc + cod + doa |*[#Iii'  
    If 360.01 > sum And sum > 359.99 Then cBz_L"5vr[  
       point_in = True _7qGo7bpN  
    Else <QZ X""  
       point_in = False 'awZ-$#  
    End If vhot-rBN  
End Function

'得到点半径,得到交点坐标函数 .6xIg+  
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() P]wCC`qi  
    '求得中心点坐标 gHe%N?'  
Dim tt As String 0b~{l;  
Dim rt(3) As Single 2\, h "W(  
    '判断是否平行 EXD Qr'"  
   acx = p3x - p1x Y,;$RV@g  
   acy = p3y - p1y ]f<H?  
   bdx = p4x - p2x <sNkyQ  
   bdy = p4y - p2y g9K7_T #W  
   If acx * bdy = acy * bdx Then yYri.n  
      rt(0) = 0 lIDGL05f'  
      Exit Function +M %zOX/  
   Else w +~,Mv\  
      '判断斜率存在否 sn6:\X<[  
      If p1x = p3x And p2x <> p4x Then ^KO=8m( )J  
         tt = "ac_n_bd_y" $b=4_UroS  
      ElseIf p1x <> p3x And p2x = p4x Then ~!A*@aC  
         tt = "ac_y_bd_n" HJ+I;OJ  
      ElseIf p1x <> p3x And p2x <> p4x Then '"QN{ja  
         tt = "ac_y_bd_y" Fo86WP}  
      End If }W)c-91  
    Select Case tt 9;B6<`e/U  
         Case "ac_n_bd_y" B^C!UWN>%X  
            'bd线段方程 r|W2I,P  
            k_bd = bdy / bdx 9u&q{I  
            b_bd = p2y - k_bd * p2x ;DXcEzV  
            p_x = p1x %e,X7W`'2  
            p_y = k_bd * p_x + b_bd u{SJ#3C5  
         Case "ac_y_bd_n" B]-~hP  
            'ac线段方程 3+` <2TP  
            k_ac = acy / acx gk.c"$2  
            b_ac = p1y - k_ac * p1x nC;2wQ6aO  
            p_x = p2x Jfs$VGZP;  
            p_y = k_ac * p_x + b_ac Nt^9N #+N  
        Case "ac_y_bd_y" FPBO=?H.  
           'ac，bd线段都要求 1s@%q <  
           k_ac = acy / acx /18VQ  
           b_ac = p1y - k_ac * p1x vn0}l6n3s  
           k_bd = bdy / bdx Mw,7+  
           b_bd = p2y - k_bd * p2x k@
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           p_x = -(b_bd - b_ac) / (k_bd - k_ac) FBCi,_ \4  
           p_y = k_ac * p_x + b_ac PIxd'B*MF  
        End Select &!E+l<.RF  
      rt(1) = p_x =5QP'Qt{O  
      rt(2) = p_y ci~pM<+  
     tnCGa%M  
'计算最大半径 2G9sKg,kL  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) F7r!zKXZ  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) P$=BmBq18`  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) V7\@g  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) RO?%0-6O&  
Dim bb(5) As Single K4V\Jj1l  
  bb(1) = rr1 RIDzNdM>U  
  bb(2) = rr2 GVaIZh<  
  bb(3) = rr3 6zfi\(fop  
  bb(4) = rr4 ;Uxr+,x~  
  nb = rr1 L-}6}5[  
For i = 1 To 4 #ARQ
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    If nb <= bb(i) Then $&!i3#FF  
       nb = bb(i) ",hPy[k  
    End If MI,b`pQ  
Next i N7b+GqYpF>  
    rt(0) = Sqr(nb) v[O}~E7'  
    rr = rt() !&k}YF  
  End If ? !dy  
         j m]d:=4_  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  qPn}$1+~  

6cF~8  
有热压工艺方面的人才或者资料分享下； *[P"2b#  
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 bc?\lD$$  

高手真多！

楼主威武霸气.