[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： JbC\l  
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图片:2.jpg

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关键点说几个： rDx],O _  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） W &wDH  
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 K<L%@[gi  
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 W7[S7kd  

以下是几个重要的函数： U}wq~fD  
1.判断点在区域中函数 v
zm4  
2.计算夹角函数 VUv.Tx]Z[  
3.转置函数 K<w5[E9V.  
4.得到区域中心点，及区域半径函数 |AfQ_iT6c  
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） ?.A/E?Oc  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 I64:-P[\  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single nJ#@W b@  
   cax = x2 - x1 &q}@[ )V4  
   cay = y2 - y1 99>yaW  
   cbx = x2 - x3 ,h`D(,?X  
   cby = y2 - y3 nW%=k!''  
   mo_jj = cax * cbx + cay * cby U`p<lxRgQ  
   mo_ca = Sqr(cax * cax + cay * cay) >~>[}d;glw  
   mo_cb = Sqr(cbx * cbx + cby * cby) 2b,TkG8K  
   cos_acb = mo_jj / (mo_ca * mo_cb) %R"/`N9R,  
   'ff_cos = cos_acb *g41"Cl  
   If cos_acb >= 1 Then *3 8Y;{ 4  
   nn = 0 GO3YXO33  
   ElseIf cos_acb <= -1 Then a[cH@7W.#  
   nn = 3.14159265258979 ~JPzjE  
   Else \ g(#)f  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) *K.7Zf0  
   End If y]Tn#4 ,/  
   'ff_angle = nn j2qfEvU  
   ff_angle = nn * 180 / 3.14159265258979 S|4/C  
End Function

'判断点在区域内函数 k$_]b0D{4  
Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean L5
uI31  
Dim aob, boc, cod, doa, sum As Single esFL<T  
  If ppx = p1x And ppy = p1y Then &.4_4"l(  
     point_in = True Zs|sPatV<  
     Exit Function ',j-n$Z^=  
  End If , tj7'c$0  
  If ppx = p2x And ppy = p2y Then XJ?z{gXJ  
     point_in = True GZX!iT  
     Exit Function DkKD~  
  End If kDa#yN\  
   If ppx = p3x And ppy = p3y Then )II,HT-LY  
     point_in = True F|Ihq^q  
     Exit Function deY
<+!  
  End If $*-L8An?  
     oXkhj,{y5  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) [E7@W[xr  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) FRk_xxe"K  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) I>Yp=R  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 97dI4t<  
    sum = aob + boc + cod + doa += ~}PF  
    If 360.01 > sum And sum > 359.99 Then 94@
!.11  
       point_in = True Hv*O9!cC  
    Else >G~;2K[  
       point_in = False io3'h:+9s  
    End If +0 |0X {v  
End Function

'得到点半径,得到交点坐标函数 H4Ek,m|c  
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() 1*jm9])#  
    '求得中心点坐标 h--bN*}H2  
Dim tt As String Sn&%epi  
Dim rt(3) As Single nHjwT5Q+Q  
    '判断是否平行 ]NsaFDi\  
   acx = p3x - p1x B ;$8<  
   acy = p3y - p1y O9)8a]  
   bdx = p4x - p2x $7YLU{0  
   bdy = p4y - p2y 7^=jv~>wP  
   If acx * bdy = acy * bdx Then R&xd ic!  
      rt(0) = 0 rzLlM  
      Exit Function \_bX2Lg  
   Else >.4Sx~VH2  
      '判断斜率存在否 +8I0.,'  
      If p1x = p3x And p2x <> p4x Then r |/9Dn%  
         tt = "ac_n_bd_y" h
+(s/o?\  
      ElseIf p1x <> p3x And p2x = p4x Then blv6  
         tt = "ac_y_bd_n" ]:fHvx_?`7  
      ElseIf p1x <> p3x And p2x <> p4x Then DI[Ee?  
         tt = "ac_y_bd_y" 9t1_"{'N1  
      End If JH#+E04#  
    Select Case tt 9k&$bC+Q  
         Case "ac_n_bd_y" ]S ,GHPEN  
            'bd线段方程 ?]N&H90^5  
            k_bd = bdy / bdx ?VsZo6Z"  
            b_bd = p2y - k_bd * p2x 1| DI'e[X  
            p_x = p1x DmsloPB?_  
            p_y = k_bd * p_x + b_bd lUd
,-  
         Case "ac_y_bd_n" |\t_I~de  
            'ac线段方程 pE N`&'4  
            k_ac = acy / acx 7F\g3^z9`  
            b_ac = p1y - k_ac * p1x %BKTN@;7  
            p_x = p2x H'.eqZM  
            p_y = k_ac * p_x + b_ac [~wcHE  
        Case "ac_y_bd_y" &YNhKm@"  
           'ac，bd线段都要求 6:pN?|=6X  
           k_ac = acy / acx qcF{Kex"  
           b_ac = p1y - k_ac * p1x Xy+|D#b  
           k_bd = bdy / bdx mgW
tjV 8  
           b_bd = p2y - k_bd * p2x }kDrUnBk  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) K<tg+(3  
           p_y = k_ac * p_x + b_ac Q23y.^W%c  
        End Select S\m]ze  
      rt(1) = p_x C
2v7(  
      rt(2) = p_y j;.&+.  
     oP6G2@3P/  
'计算最大半径 f9$q.a*  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) J:a^''  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) }s[/b"%y  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) [>86i  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) m/AN*`V  
Dim bb(5) As Single OHw6#N$\  
  bb(1) = rr1 kn.z8%^(  
  bb(2) = rr2 &Is%I<'o  
  bb(3) = rr3 iVcBD0 q)  
  bb(4) = rr4 *#_jTwQe  
  nb = rr1 79DC]48M  
For i = 1 To 4 nDvWOt  
    If nb <= bb(i) Then ;o\wSHc  
       nb = bb(i) W+E2({  
    End If AdNsY/Y(  
Next i 8TZe=sD~cr  
    rt(0) = Sqr(nb)  ^8iy(  
    rr = rt() 
KVCS(oN  
  End If gNeCnf#Xa  
         uu>g(q?4II  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  yS?1JWUC>  

FUDMaI  
有热压工艺方面的人才或者资料分享下； T:si?7CR  
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 eaI&DP  

高手真多！

楼主威武霸气.