[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： /{%p%Q[X  
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关键点说几个： )~be<G( a  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） -58Sb"f  
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 r,Tq";N'  
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 TR'<D9kn  

以下是几个重要的函数： kJ"}JRA<  
1.判断点在区域中函数 oD3Q{e  
2.计算夹角函数 Rja>N)MzBf  
3.转置函数 @m+FAdA 0  
4.得到区域中心点，及区域半径函数 so_^%) gdJ  
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） ;nw}x4Y[  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 EfqC_,J*3  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 4%*`'o$_  
   cax = x2 - x1 :~\ y
<  
   cay = y2 - y1 !m?W+z~J  
   cbx = x2 - x3 5!qLJmd=  
   cby = y2 - y3 ,U=7#Cf!  
   mo_jj = cax * cbx + cay * cby @vPGkM#oW  
   mo_ca = Sqr(cax * cax + cay * cay) _Kg"l5?B  
   mo_cb = Sqr(cbx * cbx + cby * cby) 1i}p?sU  
   cos_acb = mo_jj / (mo_ca * mo_cb) N >k,"=N/  
   'ff_cos = cos_acb YJ{_%z|U  
   If cos_acb >= 1 Then &24>9  
   nn = 0 G\#dMCk?  
   ElseIf cos_acb <= -1 Then xPMX\aI|l  
   nn = 3.14159265258979 3yu,qb'"&  
   Else @!::_E+F]  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ~QU\kZ7Z  
   End If Bi|-KS.9  
   'ff_angle = nn ZmZ7E]c  
   ff_angle = nn * 180 / 3.14159265258979 ?<~P)aVVj  
End Function

'判断点在区域内函数 +?uZ~VSl  
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 ;c|G  
Dim aob, boc, cod, doa, sum As Single ^i6`w_/  
  If ppx = p1x And ppy = p1y Then 7F8>w 7Y]  
     point_in = True ,e+S7YX  
     Exit Function Z'_EX7r  
  End If wu19Pg?F  
  If ppx = p2x And ppy = p2y Then !KLY*bt6  
     point_in = True ::!{f+Up  
     Exit Function &I?d(Z=:\  
  End If R![1\Yv&
 
   If ppx = p3x And ppy = p3y Then Df0m  
     point_in = True ;\gHFG}  
     Exit Function ci`N,&:R  
  End If e'&<DE)  
     Q3aZB*$
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    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) NXdT"O=P  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) UE 
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    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) >?ckBU9  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 2IFEl-IB[  
    sum = aob + boc + cod + doa )k&!&  
    If 360.01 > sum And sum > 359.99 Then "U iv[8B  
       point_in = True Awlw6?   
    Else ' O d_:]  
       point_in = False AHdh
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    End If *!L it:H  
End Function

'得到点半径,得到交点坐标函数 #H&`wMZZ:  
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() {{Z3M>Q  
    '求得中心点坐标 >kG: MJj  
Dim tt As String .?;"iv+  
Dim rt(3) As Single {%XDr,myd  
    '判断是否平行 *)um^O  
   acx = p3x - p1x xQ@gh ( (  
   acy = p3y - p1y H@BU/{  
   bdx = p4x - p2x nfA#d-  
   bdy = p4y - p2y p^?]xD(  
   If acx * bdy = acy * bdx Then <wO8=bem  
      rt(0) = 0 rT28q.  
      Exit Function Qj(|uGqm3  
   Else 46M?Gfd,X  
      '判断斜率存在否 d9yfSZ  
      If p1x = p3x And p2x <> p4x Then av4g/7=  
         tt = "ac_n_bd_y" 1bpjj'2%x  
      ElseIf p1x <> p3x And p2x = p4x Then B&4NdL/  
         tt = "ac_y_bd_n" rd!4u14  
      ElseIf p1x <> p3x And p2x <> p4x Then VXIB9 /*i  
         tt = "ac_y_bd_y" 0v'FE35~s  
      End If 2^T`> ?{X  
    Select Case tt GHR,KB7 xM  
         Case "ac_n_bd_y" 8ZvozQE  
            'bd线段方程 t+m ug  
            k_bd = bdy / bdx G5'HrV  
            b_bd = p2y - k_bd * p2x ^V;2v? O  
            p_x = p1x x
/xd  
            p_y = k_bd * p_x + b_bd ;-@v1I;  
         Case "ac_y_bd_n" !%Qm{R  
            'ac线段方程 =U_O;NC  
            k_ac = acy / acx I,wgu:}P#  
            b_ac = p1y - k_ac * p1x tP]-u3  
            p_x = p2x Pq)C(Z  
            p_y = k_ac * p_x + b_ac 0ntf%#2{  
        Case "ac_y_bd_y" j SXVLyz  
           'ac，bd线段都要求 |)IS[:X  
           k_ac = acy / acx KiO1l{.s8n  
           b_ac = p1y - k_ac * p1x MNZD-[  
           k_bd = bdy / bdx `]3A#y)v  
           b_bd = p2y - k_bd * p2x D_)n\(3  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) `dK%I U  
           p_y = k_ac * p_x + b_ac EG3?C  
        End Select F)^:WWVc#  
      rt(1) = p_x i\z,)xp  
      rt(2) = p_y mu#  a  
     B0#JX MX9  
'计算最大半径 l~i&r?,]^  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) FCMV1,  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) !e0~|8  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 'Z=8no`<  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) qZ|>{^a*  
Dim bb(5) As Single d-sK{ZC"y  
  bb(1) = rr1 /1R` E9  
  bb(2) = rr2 K84VeAe  
  bb(3) = rr3 j`pX2S  
  bb(4) = rr4 1Xj>kE:  
  nb = rr1 /R% Xkb  
For i = 1 To 4 2%*mL98WK  
    If nb <= bb(i) Then k x26nDT(  
       nb = bb(i) \c.MIDp"  
    End If X23#y7:  
Next i cas5  
    rt(0) = Sqr(nb) ^CWxYDG*  
    rr = rt() .PJ
CBTe  
  End If oz[: T3oE>  
         cczV}m2)  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Uxl7O4J@H  

de<T5/  
有热压工艺方面的人才或者资料分享下； 9iy3 dy^  
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 Y:-O/X  

高手真多！

楼主威武霸气.