[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： SG0PQ  
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关键点说几个： `2x.-  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） $o
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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 6zNWDUf  
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 O?A%  

以下是几个重要的函数： D~M R)z_p~  
1.判断点在区域中函数 EQ
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2.计算夹角函数 \l 8_aj  
3.转置函数 bH'2iG  
4.得到区域中心点，及区域半径函数 co^h2b  
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） r{SDJa  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 koD}o^U#  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single KHJ wCv  
   cax = x2 - x1 [/ertB  
   cay = y2 - y1 ~82 {Y _{/  
   cbx = x2 - x3 s| Q1;%Tj  
   cby = y2 - y3 Sl<1Rme=w  
   mo_jj = cax * cbx + cay * cby @v&s|X'  
   mo_ca = Sqr(cax * cax + cay * cay) *W>, 98  
   mo_cb = Sqr(cbx * cbx + cby * cby) ;vX1U8  
   cos_acb = mo_jj / (mo_ca * mo_cb) gjX1z{{~L  
   'ff_cos = cos_acb T.-tV[2  
   If cos_acb >= 1 Then unbIfl=  
   nn = 0 Y"yrc0'&T  
   ElseIf cos_acb <= -1 Then Ck"db30.  
   nn = 3.14159265258979 D<<q5gG  
   Else G#6Z@|kVw  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) -!li,&,A1  
   End If IXR'JZ?f
H  
   'ff_angle = nn Em5,Zr_  
   ff_angle = nn * 180 / 3.14159265258979 cx&\oP  
End Function

'判断点在区域内函数 V`W']  
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 4gNN "  
Dim aob, boc, cod, doa, sum As Single S7#dyAX8  
  If ppx = p1x And ppy = p1y Then
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     point_in = True p4UEhT  
     Exit Function ~UNha/nt  
  End If X!'C'3X  
  If ppx = p2x And ppy = p2y Then 8"-=+w.CZ  
     point_in = True @pYC!;n+  
     Exit Function .QwB7+V4  
  End If g`fMHU7  
   If ppx = p3x And ppy = p3y Then ">eled)O  
     point_in = True "19#{yX4  
     Exit Function {x_cgsn  
  End If -
qHG*v,  
     |0}7/^  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) (6:.u.b  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) CYwV]lq:s  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 3(,m(+J[S  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) .>.GQUr  
    sum = aob + boc + cod + doa SE6(3f$  
    If 360.01 > sum And sum > 359.99 Then vf+z0df  
       point_in = True k<+Sj h$  
    Else %Q &']  
       point_in = False #W3H;'~/5  
    End If r `n|fD.  
End Function

'得到点半径,得到交点坐标函数 /Wjc\n$'  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() jl(D;JnF  
    '求得中心点坐标 UIU:^g0  
Dim tt As String ?Fny_{&^H  
Dim rt(3) As Single .!Z5A9^  
    '判断是否平行 ipp`99  
   acx = p3x - p1x #0uu19+}  
   acy = p3y - p1y X1a~l|$h  
   bdx = p4x - p2x &oB*gGRw=7  
   bdy = p4y - p2y A:GqR;;"x>  
   If acx * bdy = acy * bdx Then CLVT5pj='  
      rt(0) = 0 kc P ZIP:  
      Exit Function rg k1.0U0  
   Else Sk!' 2y*@&  
      '判断斜率存在否 ht]n*  
      If p1x = p3x And p2x <> p4x Then L/-SWid)  
         tt = "ac_n_bd_y" @<pd@Mpf]  
      ElseIf p1x <> p3x And p2x = p4x Then 8Nyz{T[  
         tt = "ac_y_bd_n" 'h'pM#D  
      ElseIf p1x <> p3x And p2x <> p4x Then SM RKEPwp&  
         tt = "ac_y_bd_y" LTo!DUi
`  
      End If eaDZ^Z Er  
    Select Case tt "N=$=Dy>  
         Case "ac_n_bd_y" `^hA&/1  
            'bd线段方程 y] D\i5Xv  
            k_bd = bdy / bdx X=)L$Kd7  
            b_bd = p2y - k_bd * p2x a6./;OC  
            p_x = p1x bO/r1W  
            p_y = k_bd * p_x + b_bd ,e;,+w=~E  
         Case "ac_y_bd_n" 3))R91I  
            'ac线段方程 yx-"&K=`  
            k_ac = acy / acx P[q>;Fx*  
            b_ac = p1y - k_ac * p1x wZ\93W-}  
            p_x = p2x XIbxi  
            p_y = k_ac * p_x + b_ac \EoE/2"<  
        Case "ac_y_bd_y" L%5y@b{AR  
           'ac，bd线段都要求 \-6y#R-B  
           k_ac = acy / acx IO"P /
Q  
           b_ac = p1y - k_ac * p1x T5ky:{Y(  
           k_bd = bdy / bdx m)pHCS  
           b_bd = p2y - k_bd * p2x h~Z &L2V  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) JcmMbd&B  
           p_y = k_ac * p_x + b_ac 3I( n];  
        End Select ^$O(oE(D  
      rt(1) = p_x ),B/NZ/-  
      rt(2) = p_y vvxD}p=y  
     ">t^jt{  
'计算最大半径 [u K,.G  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) XfVdYmii  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) .txtt?ZF2  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) U9b[t  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) S>
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Dim bb(5) As Single r^C(|Vx  
  bb(1) = rr1 "'Fvt-<^S7  
  bb(2) = rr2 dazML|1ow  
  bb(3) = rr3 9ETdO,L)f  
  bb(4) = rr4 O]hUOc`k  
  nb = rr1 (EWGX |QA  
For i = 1 To 4 O^-QqCZE  
    If nb <= bb(i) Then ?r&~(<^z  
       nb = bb(i) ll$mRC  
    End If R+uZi~  
Next i T|S-?X,  
    rt(0) = Sqr(nb) 7ixG{yu  
    rr = rt() n5A|Zjk;  
  End If v}t{*P  
         @aUNyyVP  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  #huh!Mn  

Y~^R^J  
有热压工艺方面的人才或者资料分享下； m$_l{|4z  
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 {*hGe_^  

高手真多！

楼主威武霸气.