[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： 0ZID @^  
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关键点说几个： 9uq+Ve>  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） k89gJ5B$  
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 p4t!T=o/  
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 L^al1T  

以下是几个重要的函数： q(PT'z  
1.判断点在区域中函数 %K7EF_%  
2.计算夹角函数 wR<QeH'V  
3.转置函数 <:;:*s3]  
4.得到区域中心点，及区域半径函数 rNzhP*F
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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） O7'^*"S  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 bvu<IXX=2  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single aU8Ti8A>  
   cax = x2 - x1 "`gZy)E  
   cay = y2 - y1 U W)&Eky  
   cbx = x2 - x3 b%jG?HSu  
   cby = y2 - y3 +xdFkc  
   mo_jj = cax * cbx + cay * cby DHNii_w4v  
   mo_ca = Sqr(cax * cax + cay * cay) SU}oKii /  
   mo_cb = Sqr(cbx * cbx + cby * cby) *7fPp8k+Z;  
   cos_acb = mo_jj / (mo_ca * mo_cb) ?gMrcc/{  
   'ff_cos = cos_acb 3)Awj++  
   If cos_acb >= 1 Then ~rJw$v  
   nn = 0 5b4V/d* '  
   ElseIf cos_acb <= -1 Then )7%]<2V%  
   nn = 3.14159265258979 W]Tt8  
   Else (5DGs_>  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) qkG;YGio  
   End If #`)-$vUv^f  
   'ff_angle = nn `k%#0E*H  
   ff_angle = nn * 180 / 3.14159265258979 7{6.  
End Function

'判断点在区域内函数 BW-P%:B1!R  
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 3udIe$.Q  
Dim aob, boc, cod, doa, sum As Single 2m_M9
e\  
  If ppx = p1x And ppy = p1y Then ~dr1Qi#j?  
     point_in = True -2ij;pkIW$  
     Exit Function x,G6`|Hl  
  End If 7-g4S]r<  
  If ppx = p2x And ppy = p2y Then U7%pOpO!  
     point_in = True LU7)F,ok  
     Exit Function r<N*N,~  
  End If Zt0%E<C{  
   If ppx = p3x And ppy = p3y Then "t&k{\$\  
     point_in = True K0H!Ds9  
     Exit Function i
T9Ex9RL  
  End If EI+/%.,  
     F1*rUsRKN  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) m`q>_*  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 6|qvo+%  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) $#W6z:  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) VgTI2  
    sum = aob + boc + cod + doa 'J0s%m|j  
    If 360.01 > sum And sum > 359.99 Then _W@Fk)E6N  
       point_in = True :bDn.`KG#  
    Else R eu J=|F  
       point_in = False D % ,yA  
    End If ?JTyNg4<  
End Function

'得到点半径,得到交点坐标函数 m1i$>9,  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() Nb^:_0&H@  
    '求得中心点坐标 dk`!UtNNRa  
Dim tt As String (w B[ ]O$@  
Dim rt(3) As Single eaP$/U D?  
    '判断是否平行 g
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   acx = p3x - p1x
;]x5;b9`  
   acy = p3y - p1y Qs X59d  
   bdx = p4x - p2x 0-f-  
   bdy = p4y - p2y ^O*hs%eO%  
   If acx * bdy = acy * bdx Then #h|< >  
      rt(0) = 0 K"$ky,tU  
      Exit Function .3&OFM  
   Else >*xzSd?\  
      '判断斜率存在否 U%\2drM&]  
      If p1x = p3x And p2x <> p4x Then iquGLwJ  
         tt = "ac_n_bd_y" S*s9?  
      ElseIf p1x <> p3x And p2x = p4x Then v 8a  
         tt = "ac_y_bd_n" TFPq(i  
      ElseIf p1x <> p3x And p2x <> p4x Then gdNp2b  
         tt = "ac_y_bd_y" XPTB,1g+f  
      End If rqJj!{<B  
    Select Case tt jk}PucV  
         Case "ac_n_bd_y" <qt%MM [Y  
            'bd线段方程 *3($s_r>  
            k_bd = bdy / bdx cs;Gk:  
            b_bd = p2y - k_bd * p2x xTm&`Xo  
            p_x = p1x PQ]N>'v-  
            p_y = k_bd * p_x + b_bd 4jro4B`  
         Case "ac_y_bd_n" 7gaC)j&  
            'ac线段方程 KL~sEli  
            k_ac = acy / acx H9!*DA<W  
            b_ac = p1y - k_ac * p1x s>I}-=.(Q  
            p_x = p2x qrYeh`Mv  
            p_y = k_ac * p_x + b_ac ?=rh=#  
        Case "ac_y_bd_y" +t{FF!mL  
           'ac，bd线段都要求 L-dKZ8Q  
           k_ac = acy / acx 0M-AIQ5  
           b_ac = p1y - k_ac * p1x R~-q!nC  
           k_bd = bdy / bdx IxR:a(  
           b_bd = p2y - k_bd * p2x E#p6A5  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) *E_= 8OV  
           p_y = k_ac * p_x + b_ac T/5UlW|\  
        End Select G[,VPC=  
      rt(1) = p_x DR8dJ#  
      rt(2) = p_y y&]D2"I  
     42LV
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'计算最大半径 75i
)$}_1B  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 1+iiiVbMH  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) m#'9)%t!J  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) `<G+N  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) UU`qI}Ys8F  
Dim bb(5) As Single 6fyW6xv[,  
  bb(1) = rr1 ,fFJSY^  
  bb(2) = rr2 I9m  
  bb(3) = rr3 ljmHX2p  
  bb(4) = rr4 VEm[F/'  
  nb = rr1 `#F>?g$2  
For i = 1 To 4 tWIhbt  
    If nb <= bb(i) Then 0IuU4h5Fr  
       nb = bb(i) pUx@QyrI  
    End If 0@;E8^pa  
Next i c7_b^7h1  
    rt(0) = Sqr(nb) uRg^:  
    rr = rt() <o}t-Bgg  
  End If zV#k #/$  
         u5[Wr:  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  &*0V!+#6  

_g
e3R3  
有热压工艺方面的人才或者资料分享下； umj7-fh  
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 -?ip?[Z  

高手真多！

楼主威武霸气.