[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： qxRT1B]{Wx  
e|S+G6 :O2  
U+:S7z@j?  

关键点说几个： .%-6&%1  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） A}az m>  
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 BiVd k
a  
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 H[>klzh6 !  

以下是几个重要的函数： #n6FQ$l8m  
1.判断点在区域中函数 Oc^6u  
2.计算夹角函数 4GmSG,]  
3.转置函数 -f-O2G=  
4.得到区域中心点，及区域半径函数 ')Dp%"\?  
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}k-2RM2k  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 [~Z'xY y  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single vUodp#s  
   cax = x2 - x1 ? bUpK  
   cay = y2 - y1 GDNh?R  
   cbx = x2 - x3 a V+o\fId  
   cby = y2 - y3 /eU1(oo&`5  
   mo_jj = cax * cbx + cay * cby QTrlQH&p  
   mo_ca = Sqr(cax * cax + cay * cay) ZmYSi$B  
   mo_cb = Sqr(cbx * cbx + cby * cby) lN][xnP  
   cos_acb = mo_jj / (mo_ca * mo_cb) D=q;+,Pc  
   'ff_cos = cos_acb
\r1kbf7?  
   If cos_acb >= 1 Then J;Z>fAE7  
   nn = 0 &?5{z
\;1"  
   ElseIf cos_acb <= -1 Then } Khq  
   nn = 3.14159265258979 R|Q_W X  
   Else 7am/X.  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 67KRM(S  
   End If + 8K1]'t$  
   'ff_angle = nn JPoK\-9NT  
   ff_angle = nn * 180 / 3.14159265258979 ^!v}  
End Function

'判断点在区域内函数 *n|0\V<  
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 /i~^LITH  
Dim aob, boc, cod, doa, sum As Single kT }'"  
  If ppx = p1x And ppy = p1y Then _c(C;s3o  
     point_in = True s2kZZP8-  
     Exit Function *|gs-<[
#X  
  End If rO?x/{;ai  
  If ppx = p2x And ppy = p2y Then |q.:hWYFpM  
     point_in = True mZ0oa-Iy  
     Exit Function <@
AsCiQF  
  End If pJ*#aH[ySP  
   If ppx = p3x And ppy = p3y Then :?:j$ =nWN  
     point_in = True v<J;S9u=  
     Exit Function gt t
$O  
  End If DP6{HR$L  
     cLyuCaH>c  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) x 1xj\O  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 3}#XA+Z  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) @;n$caw  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) >&TnTv?I  
    sum = aob + boc + cod + doa moJT8tb  
    If 360.01 > sum And sum > 359.99 Then =[)N6XV3  
       point_in = True g
<T`F  
    Else 1-NX>E5  
       point_in = False L..X)-D2n  
    End If wq_oh*"  
End Function

'得到点半径,得到交点坐标函数 <sCq x/L  
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() On.x~t  
    '求得中心点坐标 4bFVyv  
Dim tt As String o(>-:l i0  
Dim rt(3) As Single whm tEY  
    '判断是否平行 g\{! 2
1M  
   acx = p3x - p1x b`W'M:$  
   acy = p3y - p1y 'iISbOM  
   bdx = p4x - p2x CygV_q
  
   bdy = p4y - p2y >'TD?@sr  
   If acx * bdy = acy * bdx Then L,A-G"z0Z  
      rt(0) = 0 Is6']bYh  
      Exit Function aq,)6P`  
   Else u r.T YKF  
      '判断斜率存在否 n`T[eb~  
      If p1x = p3x And p2x <> p4x Then =O'%)Y&  
         tt = "ac_n_bd_y" rWfurB5f  
      ElseIf p1x <> p3x And p2x = p4x Then )>M@hIV5>  
         tt = "ac_y_bd_n" Ce'2lo  
      ElseIf p1x <> p3x And p2x <> p4x Then L%O8vn^3  
         tt = "ac_y_bd_y" ~W*j^+T"  
      End If l 75{JxZX  
    Select Case tt #M^Yh?~%w  
         Case "ac_n_bd_y" [O+^eE6h  
            'bd线段方程 %3+hz$E  
            k_bd = bdy / bdx 2d;xAX]  
            b_bd = p2y - k_bd * p2x Cbg#Yz~/  
            p_x = p1x 5m7Ax]\  
            p_y = k_bd * p_x + b_bd ZFuJ2 :  
         Case "ac_y_bd_n" ;q&D,4r]  
            'ac线段方程 XhD fI &  
            k_ac = acy / acx y'O{8Q8T  
            b_ac = p1y - k_ac * p1x MHyl=5  
            p_x = p2x RowiSW  
            p_y = k_ac * p_x + b_ac JR<-'  
        Case "ac_y_bd_y" bl>b/u7/6  
           'ac，bd线段都要求 z(X6%p0  
           k_ac = acy / acx z slEUTj)  
           b_ac = p1y - k_ac * p1x wBHDof xX  
           k_bd = bdy / bdx EM w(%}8w  
           b_bd = p2y - k_bd * p2x A^@<+?  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) u\geD  
           p_y = k_ac * p_x + b_ac @d^h/w  
        End Select !gew;Jz  
      rt(1) = p_x U@5Z9/n{  
      rt(2) = p_y :@Dos'0Px  
     RZh)0S>J  
'计算最大半径 N_Ld,J%g  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Bg0cC  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) "s<lLgi  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ~[y+B0I3  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) }Q^a.`h  
Dim bb(5) As Single GFa/9Bi  
  bb(1) = rr1 swq!Sp  
  bb(2) = rr2 GiwA$^Hg\  
  bb(3) = rr3 U*:'/.  
  bb(4) = rr4 9:w,@Phe  
  nb = rr1 LhRe?U\  
For i = 1 To 4 ^|;4/=bbs  
    If nb <= bb(i) Then R,+(JgJ  
       nb = bb(i) kD7(}N8YR  
    End If &E`Z_}~  
Next i Hll}8d6[  
    rt(0) = Sqr(nb) &*GX:0=/>  
    rr = rt() X )s7_  
  End If V>92/w.fe  
         u`@FA?+E1  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  vrbh+  

}*.*{I  
有热压工艺方面的人才或者资料分享下； glgk>83I+  
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 V}qmH2h  

高手真多！

楼主威武霸气.