[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：  MMk9rBf  
%@%rdrZ  
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关键点说几个： GR(m+%Vw!  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ~i?Jg/qcxN  
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 [Y@}{[q5  
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 "1"
"1";  

以下是几个重要的函数： StR)O))I  
1.判断点在区域中函数 f dJg7r*  
2.计算夹角函数 P{s1NorKDh  
3.转置函数 (j:[<U
  
4.得到区域中心点，及区域半径函数 4]zn,g?&  
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） B4*,]lS?  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 W#d'SL#5  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single &9Z@P[f  
   cax = x2 - x1 kSJ;kz,_  
   cay = y2 - y1 8%; .H-  
   cbx = x2 - x3 oN83`Z  
   cby = y2 - y3 [N*S5^>1  
   mo_jj = cax * cbx + cay * cby .1h\r, #  
   mo_ca = Sqr(cax * cax + cay * cay) 4ke.p<dG  
   mo_cb = Sqr(cbx * cbx + cby * cby) nRHlHu  
   cos_acb = mo_jj / (mo_ca * mo_cb) 6P9#6mZ  
   'ff_cos = cos_acb !oRN,m[7)p  
   If cos_acb >= 1 Then }f{5-iwD}  
   nn = 0 S=L#8CID  
   ElseIf cos_acb <= -1 Then blG?("0!  
   nn = 3.14159265258979 3<Z@!ft8  
   Else /ml+b8@  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) rCGKE`H
 
   End If _M>S=3w  
   'ff_angle = nn E^w0X,0XlE  
   ff_angle = nn * 180 / 3.14159265258979 KLj/,ehD !  
End Function

'判断点在区域内函数 "|WKK}  
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 tnXW7ej^  
Dim aob, boc, cod, doa, sum As Single hR>`I0|p&  
  If ppx = p1x And ppy = p1y Then aO:A pOAO  
     point_in = True tQ
Mz1$  
     Exit Function *MWI`=c  
  End If #Guwbg  
  If ppx = p2x And ppy = p2y Then p8CaD4bE  
     point_in = True MzW!iG  
     Exit Function 0KZsWlD:L  
  End If {!4ZRNy(k  
   If ppx = p3x And ppy = p3y Then naY#`xig
 
     point_in = True X-"0Zc  
     Exit Function :'!_PN  
  End If =lh&oPc1  
     }V+&o\4  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) p:!FB8  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 4 $)}d  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) %CrpUx  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) &9n=!S'Md  
    sum = aob + boc + cod + doa n>lQ:l~  
    If 360.01 > sum And sum > 359.99 Then h5; +5B}D  
       point_in = True /5XdZu6k`h  
    Else XOZ@ek)LY  
       point_in = False 8L))@SA+uJ  
    End If ',Oc+jLR  
End Function

'得到点半径,得到交点坐标函数 I\6^]pi,  
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() .18MMzdN  
    '求得中心点坐标 tH4+S?PI  
Dim tt As String <*4r6UFR  
Dim rt(3) As Single 6)3pnhG9  
    '判断是否平行 qEPC]es|T  
   acx = p3x - p1x `9VRT`e  
   acy = p3y - p1y SM`n:{N(  
   bdx = p4x - p2x 4Cf.%f9@  
   bdy = p4y - p2y ,HW[l.v  
   If acx * bdy = acy * bdx Then O/f+B}W  
      rt(0) = 0 4p(\2?
B%f  
      Exit Function 0
!F!Y_  
   Else 9C1\?)"D^e  
      '判断斜率存在否 s !HOrhV  
      If p1x = p3x And p2x <> p4x Then (DKQHL;  
         tt = "ac_n_bd_y" #Ic-?2Gn4<  
      ElseIf p1x <> p3x And p2x = p4x Then ^pvnUODW[  
         tt = "ac_y_bd_n"
4{=^J2z  
      ElseIf p1x <> p3x And p2x <> p4x Then ]A:G>K  
         tt = "ac_y_bd_y" }xy[&-dh  
      End If WS ^%< h#  
    Select Case tt =&?BPhJE  
         Case "ac_n_bd_y" G+Zm  
            'bd线段方程 )m(?U
 
            k_bd = bdy / bdx y$HV;%G{26  
            b_bd = p2y - k_bd * p2x c0:`+>p2  
            p_x = p1x k iY1  
            p_y = k_bd * p_x + b_bd ;ywUl`d  
         Case "ac_y_bd_n" J?bx<$C@  
            'ac线段方程 E$E#c8I:  
            k_ac = acy / acx 5+iXOs<   
            b_ac = p1y - k_ac * p1x |VML.u:N  
            p_x = p2x ]hi5nA  
            p_y = k_ac * p_x + b_ac 0\yA6`}!  
        Case "ac_y_bd_y" A>J,Bi  
           'ac，bd线段都要求 (wZ/I(4  
           k_ac = acy / acx [-JU(:Rh  
           b_ac = p1y - k_ac * p1x $2pkh%  
           k_bd = bdy / bdx hxuc4C\J  
           b_bd = p2y - k_bd * p2x &qae+p?  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) R"qxT.P(  
           p_y = k_ac * p_x + b_ac CR'
1,  
        End Select IpI|G!Y,  
      rt(1) = p_x 2umgF  
      rt(2) = p_y >du|
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     w|8T6W|w  
'计算最大半径 8{4jlL;"`?  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) aO$I|!tl  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ps3jw*QZ{5  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 6Y&`mgMF'  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Lk1e{!a  
Dim bb(5) As Single 0ZJt  
  bb(1) = rr1 {:c5/ ,7c;  
  bb(2) = rr2 ,ftKRq  
  bb(3) = rr3 5?1:RE(1  
  bb(4) = rr4 =^`?O* /;  
  nb = rr1 ~~X-$rtU  
For i = 1 To 4 qjmlwVw  
    If nb <= bb(i) Then R&]#@PW^  
       nb = bb(i) o==:e  
    End If gX!-s*{E  
Next i |WDMyKf6J  
    rt(0) = Sqr(nb) zM2_z  
    rr = rt() |kh7F0';"  
  End If 6_kv~`"tZ  
         g!DJW  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  _Wqy,L;J  

}`.d4mm  
有热压工艺方面的人才或者资料分享下； ,pIh.sk7s*  
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 zf;sdQ;4  

高手真多！

楼主威武霸气.