[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： 5{d\uE%'p  
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关键点说几个： JBC$Ku  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） "B{ECM;  
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 ibpzeuUl  
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 :K':P5i  

以下是几个重要的函数： 17|np2~  
1.判断点在区域中函数 'zZcn" +!  
2.计算夹角函数 \.uc06  
3.转置函数 $HJTj29/  
4.得到区域中心点，及区域半径函数 -nbMTY}  
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） p|+B3  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 S
6d`ioi-  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 69K{+|  
   cax = x2 - x1 n5-)/R[z  
   cay = y2 - y1 S8d8%R~1=h  
   cbx = x2 - x3 kq=V4-a[  
   cby = y2 - y3 Sh6JF574T  
   mo_jj = cax * cbx + cay * cby X-LA}YH=tS  
   mo_ca = Sqr(cax * cax + cay * cay) `d]IX^;  
   mo_cb = Sqr(cbx * cbx + cby * cby) |RkcDrB~  
   cos_acb = mo_jj / (mo_ca * mo_cb) S~Z|PLtF  
   'ff_cos = cos_acb MPgS!V1  
   If cos_acb >= 1 Then 4Y> Yi*n  
   nn = 0 %V`F!D<D  
   ElseIf cos_acb <= -1 Then y&m0Lz53Z  
   nn = 3.14159265258979 %xZG*2vc!B  
   Else '*^yAlgtt  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) iIT8H\e  
   End If F>je4S;  
   'ff_angle = nn X~=xXN.  
   ff_angle = nn * 180 / 3.14159265258979 -|k)tvAm  
End Function

'判断点在区域内函数 H=
*5ASc  
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 `p b5*h6r!  
Dim aob, boc, cod, doa, sum As Single u]NZ`t%AP  
  If ppx = p1x And ppy = p1y Then 8P7"&VY
c8  
     point_in = True vu!d)Fy  
     Exit Function j"^+oxH  
  End If 99$ 5`R;  
  If ppx = p2x And ppy = p2y Then eI.2`)>  
     point_in = True -9
!.m  
     Exit Function tWTKgbj(  
  End If FLg*R/  
   If ppx = p3x And ppy = p3y Then =deMd`=J  
     point_in = True 8.'#?]a  
     Exit Function ]5~s"fnG  
  End If ?Xdak|?i  
     BqDKT  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 9a\nszwa  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Xs&TJ8a  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) [,n c  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ~ ~uAc_  
    sum = aob + boc + cod + doa >Vy>O&r  
    If 360.01 > sum And sum > 359.99 Then b2 _Yu^  
       point_in = True alh >"9~!  
    Else aQ^umrj@?9  
       point_in = False -9RDr\&`(  
    End If v_e9}yI  
End Function

'得到点半径,得到交点坐标函数 t8^m`W  
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() z <mK>$  
    '求得中心点坐标 6v,z@!b  
Dim tt As String  Rqwzh@}  
Dim rt(3) As Single UAR5^  
    '判断是否平行 ^[%%r3"$C  
   acx = p3x - p1x eC5$#,HiC  
   acy = p3y - p1y 6wco&7   
   bdx = p4x - p2x zF5uN:-s  
   bdy = p4y - p2y $/6;9d^  
   If acx * bdy = acy * bdx Then QwhRNnE=  
      rt(0) = 0 l5
l>d62  
      Exit Function w9 w%&{j  
   Else e><5Pr
)  
      '判断斜率存在否 G=;k=oX(  
      If p1x = p3x And p2x <> p4x Then >~`C-K#  
         tt = "ac_n_bd_y" Kwc6mlw~M  
      ElseIf p1x <> p3x And p2x = p4x Then s2j['g5  
         tt = "ac_y_bd_n" .]aF 1}AI  
      ElseIf p1x <> p3x And p2x <> p4x Then x0d~i!d  
         tt = "ac_y_bd_y" Bgmn2-  
      End If Ra*e5  
    Select Case tt }j,[ 1@S  
         Case "ac_n_bd_y" JCAq8=zM  
            'bd线段方程 JG{j)O|L  
            k_bd = bdy / bdx L 8{\r$  
            b_bd = p2y - k_bd * p2x eY{+~|KZ  
            p_x = p1x 7JSNYTH  
            p_y = k_bd * p_x + b_bd .9O$G2'oh  
         Case "ac_y_bd_n" EUsI%p  
            'ac线段方程 j~j\\Y  
            k_ac = acy / acx (E]!Z vE  
            b_ac = p1y - k_ac * p1x wP"dZagpj  
            p_x = p2x ~b{Gz6u>  
            p_y = k_ac * p_x + b_ac nx0K$Ptq  
        Case "ac_y_bd_y" sg
E-`#  
           'ac，bd线段都要求 Q f(p~a(d  
           k_ac = acy / acx |yo\R{&6  
           b_ac = p1y - k_ac * p1x +a^F\8H  
           k_bd = bdy / bdx 7)h[Zy,A  
           b_bd = p2y - k_bd * p2x p}[zt#v  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) pRSOYTebP  
           p_y = k_ac * p_x + b_ac !|c|o*t{  
        End Select Ts~L:3oaQ  
      rt(1) = p_x l }XU59  
      rt(2) = p_y ja=F7Usb  
     xq"Jy=4Q*  
'计算最大半径 xC C:BO`pw  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) |d6T/Uxo  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) |p$spQ
 
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 43V}#DA@  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) a#T]*(Yq)  
Dim bb(5) As Single ,^icPQSwc  
  bb(1) = rr1 DNP13wp@  
  bb(2) = rr2 ?`J[[",  
  bb(3) = rr3 $['Bv  
  bb(4) = rr4 Z4IgBn(Z_}  
  nb = rr1 }^B6yWUN  
For i = 1 To 4 Lk
QX?2>]  
    If nb <= bb(i) Then F:mq'<Q  
       nb = bb(i) 1#1 riM -  
    End If imiR/V>N  
Next i ZoArQ(YFy  
    rt(0) = Sqr(nb) +VQ\mA59  
    rr = rt() i*CZV|t US  
  End If !Ra*)b"  
         ;NlWb =  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  QqU!Najf  

mrw=T.  
有热压工艺方面的人才或者资料分享下； $*?,#ta  
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 KY~-;0x  

高手真多！

楼主威武霸气.