[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： =E?!!EIq.  
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关键点说几个： ;gC.fpu  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） q-g3!  
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 xsPE UK&g  
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 wm$1LZ8o-`  

以下是几个重要的函数： S+d@RMdes  
1.判断点在区域中函数 Vd-\_VP20  
2.计算夹角函数 ndIf1}   
3.转置函数 $rAHtr  
4.得到区域中心点，及区域半径函数 &:i|;^^2  
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） f xWW"B*A  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 QJL%J  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single _B@=fY(g!  
   cax = x2 - x1 7IrbwAGZ3  
   cay = y2 - y1 p7UdZOi2  
   cbx = x2 - x3 K0|8h!WF+  
   cby = y2 - y3 %_rdO(   
   mo_jj = cax * cbx + cay * cby h&$7^P  
   mo_ca = Sqr(cax * cax + cay * cay) +:hZ,G?>  
   mo_cb = Sqr(cbx * cbx + cby * cby) 7~2b4"&
 
   cos_acb = mo_jj / (mo_ca * mo_cb) j4ARGkK5B  
   'ff_cos = cos_acb )T-C/
3  
   If cos_acb >= 1 Then G@YX8!wU  
   nn = 0 (v11;kdJB  
   ElseIf cos_acb <= -1 Then gWxpGW^eZ~  
   nn = 3.14159265258979 I[r  
   Else )ZU)$dJ>V  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) aZ[ aZU  
   End If BT|5"b}  
   'ff_angle = nn 0b)^#+  
   ff_angle = nn * 180 / 3.14159265258979 DrfOz#a0Uu  
End Function

'判断点在区域内函数 !H,_*u.  
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 IO,ddVO  
Dim aob, boc, cod, doa, sum As Single {s=n "*Qp)  
  If ppx = p1x And ppy = p1y Then o5!"dxR  
     point_in = True 5Ocd2T'  
     Exit Function v9<7=D&x  
  End If Y<~Nx~w{  
  If ppx = p2x And ppy = p2y Then j"F
X ?|4  
     point_in = True q|*}>=NX  
     Exit Function +~gqPk  
  End If  U>0' K3_  
   If ppx = p3x And ppy = p3y Then 1ga-8&!  
     point_in = True v35wlt^}  
     Exit Function 0FA N9u2  
  End If [@SLt$9"  
     m7zx,bz>  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ?vHow$  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) x"hZOgFZ  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) I6bekOvP  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) %Pr PCT  
    sum = aob + boc + cod + doa mI55vNyer  
    If 360.01 > sum And sum > 359.99 Then Q o}&2m  
       point_in = True RR2Q  
    Else J. ]~J|K  
       point_in = False pEUbP,3M:  
    End If d3A= (/>D  
End Function

'得到点半径,得到交点坐标函数 ]X:{y&g(  
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() ENlqoj1  
    '求得中心点坐标 nC^|83  
Dim tt As String C4Pi6.wf  
Dim rt(3) As Single f/spJ<B).4  
    '判断是否平行 (kpn"]^
'  
   acx = p3x - p1x A;e[-5@  
   acy = p3y - p1y +\SNaq~&  
   bdx = p4x - p2x wRgh`Hc\}  
   bdy = p4y - p2y iI_ad7,u  
   If acx * bdy = acy * bdx Then \3P.GS{l  
      rt(0) = 0 Vp =  
      Exit Function zWiMl.[  
   Else P;%4Imq3  
      '判断斜率存在否 FhJ8}at+e  
      If p1x = p3x And p2x <> p4x Then nSH A,c  
         tt = "ac_n_bd_y" GarPnb  
      ElseIf p1x <> p3x And p2x = p4x Then R|PFGhi6"A  
         tt = "ac_y_bd_n" F$kLft[:  
      ElseIf p1x <> p3x And p2x <> p4x Then xrbDqA.b  
         tt = "ac_y_bd_y" (mq 7{;7y  
      End If =}S*]Me5  
    Select Case tt 65FdA-4  
         Case "ac_n_bd_y" :Jp$_T&E  
            'bd线段方程 5#~ARk*?a  
            k_bd = bdy / bdx Wsb=SM7;  
            b_bd = p2y - k_bd * p2x 0 S3~IeJ  
            p_x = p1x :tP:X+?O  
            p_y = k_bd * p_x + b_bd '}a[9v76  
         Case "ac_y_bd_n" Xg*IOhF6x  
            'ac线段方程 3VJoH4E!6  
            k_ac = acy / acx &]VCZQL  
            b_ac = p1y - k_ac * p1x ygm4Aj>  
            p_x = p2x .lMIJN&/  
            p_y = k_ac * p_x + b_ac q2VQS1R`8  
        Case "ac_y_bd_y" ien >Ou  
           'ac，bd线段都要求 9moenkL  
           k_ac = acy / acx 6l|pTyb1  
           b_ac = p1y - k_ac * p1x Q1qf'u
 
           k_bd = bdy / bdx sa\v9  
           b_bd = p2y - k_bd * p2x $KL5Z#K  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ]JQk,<l5E  
           p_y = k_ac * p_x + b_ac wI+oG  
        End Select .+XGbs]kCi  
      rt(1) = p_x \m!swYy  
      rt(2) = p_y #84p
RU~  
     nVI\Or[  
'计算最大半径 zuOx@T^  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) O`e0r%SJ  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) qX{m7  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) M70Xdn  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) $rf4h]&<  
Dim bb(5) As Single jRXpEiM  
  bb(1) = rr1 Mf0g)X}1  
  bb(2) = rr2 )L#C1DP#  
  bb(3) = rr3 X<s']C9c  
  bb(4) = rr4 |RQ19m@  
  nb = rr1 620y[iiK$  
For i = 1 To 4 @YyTXg{ZK  
    If nb <= bb(i) Then bu"R2~sb  
       nb = bb(i) ;i`X&[y;  
    End If H`4H(KWm  
Next i a pqzf  
    rt(0) = Sqr(nb) rkA0v-N6v  
    rr = rt() DB'pRo+U  
  End If *a Y`[,4#$  
         lp5`Kw\  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  0IBVR,q  

C<fWDLwYqV  
有热压工艺方面的人才或者资料分享下； Y32F{ z  
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 0t5>'GYX  

高手真多！

楼主威武霸气.