[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： k`5K&  
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关键点说几个： G-;EB  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Dk8@x8  
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 U}5]Vm$]  
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 rls{~ZRl  

以下是几个重要的函数： V{x[^+w7X~  
1.判断点在区域中函数 ZA@zs,o%  
2.计算夹角函数 .f>7a;V?}  
3.转置函数 a$bE2'cb  
4.得到区域中心点，及区域半径函数 ziM@@$.F  
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） )V*`(dn'zm  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 6BEDk!  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single pZt>rv  
   cax = x2 - x1 HNlW.y"  
   cay = y2 - y1 >*n4j:  
   cbx = x2 - x3
R4$(NNC+/  
   cby = y2 - y3 :QXKG8^  
   mo_jj = cax * cbx + cay * cby S?OCy4dk:  
   mo_ca = Sqr(cax * cax + cay * cay) 8=?U7aw  
   mo_cb = Sqr(cbx * cbx + cby * cby) t"e%'dFv  
   cos_acb = mo_jj / (mo_ca * mo_cb) ];N/KHeZ  
   'ff_cos = cos_acb z92Xc  
   If cos_acb >= 1 Then L&uPNcZ`-  
   nn = 0 U:[CcN/~3  
   ElseIf cos_acb <= -1 Then <i`s)L  
   nn = 3.14159265258979 <54KWC86)J  
   Else ej=}OH4  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) U!JmSP  
   End If LCq1F(q  
   'ff_angle = nn ,\d03wha  
   ff_angle = nn * 180 / 3.14159265258979 Y@T$O<*  
End Function

'判断点在区域内函数 Y/pK  
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 Rd5pLrr[0)  
Dim aob, boc, cod, doa, sum As Single #'RfwldD9  
  If ppx = p1x And ppy = p1y Then lTtc#  
     point_in = True aQzmobleep  
     Exit Function G(t&(t`[  
  End If \{ C ~B;=  
  If ppx = p2x And ppy = p2y Then */$]k
E  
     point_in = True V!e*J,g  
     Exit Function ]g
,j  
  End If x`'s  
   If ppx = p3x And ppy = p3y Then BIg2`95F|  
     point_in = True VMNd
C}  
     Exit Function :?i,!0#"  
  End If RK)ikLgp  
     + EKp*Vje  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) vVsaGW   
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Qk
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    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) yBv4 xKMH  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) _eH@G(W(  
    sum = aob + boc + cod + doa s=z$;1C  
    If 360.01 > sum And sum > 359.99 Then ?
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       point_in = True
pK/RkA1  
    Else vSH-hAk  
       point_in = False n:H |=SF{  
    End If n-<`Z NMU  
End Function

'得到点半径,得到交点坐标函数 QPvWdjf#mM  
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() Kf$6D 79#  
    '求得中心点坐标 @ W q8AFo  
Dim tt As String 'l-VWqR-  
Dim rt(3) As Single t!>0^['g4  
    '判断是否平行 vJ&35nF&  
   acx = p3x - p1x !&v"+ K3lU  
   acy = p3y - p1y ?b(DDQMf  
   bdx = p4x - p2x NxF
CVqGb  
   bdy = p4y - p2y *;lb<uLv  
   If acx * bdy = acy * bdx Then A!$sOp  
      rt(0) = 0 gDX\ p>7  
      Exit Function (F:|tiV+  
   Else =~dsIG  
      '判断斜率存在否 X-j<fX_  
      If p1x = p3x And p2x <> p4x Then Vu<mOuh
 
         tt = "ac_n_bd_y" c5[~2e  
      ElseIf p1x <> p3x And p2x = p4x Then ?9*[\m?-  
         tt = "ac_y_bd_n" \z.p [;'ir  
      ElseIf p1x <> p3x And p2x <> p4x Then kkj_k:Eah  
         tt = "ac_y_bd_y" |(Xxi  
      End If .ffr2\'*  
    Select Case tt V<KjKa+sG  
         Case "ac_n_bd_y" V9`jq$  
            'bd线段方程 a4q02 cV  
            k_bd = bdy / bdx ZCfd<NS?  
            b_bd = p2y - k_bd * p2x F5w=tK  
            p_x = p1x A=*6|1w;  
            p_y = k_bd * p_x + b_bd Ka"1gbJ|  
         Case "ac_y_bd_n" Yg1HvSw\  
            'ac线段方程 8yuTT^  
            k_ac = acy / acx gM6o~ E  
            b_ac = p1y - k_ac * p1x p\]rxtm  
            p_x = p2x |%(qaPA1  
            p_y = k_ac * p_x + b_ac Ti#x62X{  
        Case "ac_y_bd_y" !VvM  
           'ac，bd线段都要求 dmMr
Z1u2  
           k_ac = acy / acx s-l3_210  
           b_ac = p1y - k_ac * p1x F@ZB6~T~.  
           k_bd = bdy / bdx @,pn/[  
           b_bd = p2y - k_bd * p2x >vuR:4B  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) W9A F}  
           p_y = k_ac * p_x + b_ac @ZcI]G%  
        End Select Hqu?="f=  
      rt(1) = p_x z7Z!wIzJ  
      rt(2) = p_y /T 4GPi\lg  
     #*}cc  
'计算最大半径 xp"F)6  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) }9+Vf'u|l  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ZP.~Y;Ch;-  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) *uF Iw}C/  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y)
R>,_C7]u  
Dim bb(5) As Single 5N|hsfkx  
  bb(1) = rr1 SFqq(K2u  
  bb(2) = rr2 :IozWPs*  
  bb(3) = rr3 *+J`Yk7}  
  bb(4) = rr4 Lcs?2c:%  
  nb = rr1 {ka={7  
For i = 1 To 4 3X1 U  
    If nb <= bb(i) Then Z$K[e  
       nb = bb(i) 1kh()IrA  
    End If P0-K/_g  
Next i SCq3Kh  
    rt(0) = Sqr(nb) 74KR.ABd  
    rr = rt() kyD*b3MN  
  End If Lo +H&-  
         KhyGz"I!@$  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  XM?C7/^k  

a*Ng+~5)6  
有热压工艺方面的人才或者资料分享下； cK1RmL"3  
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 d{RMX<;G  

高手真多！

楼主威武霸气.