[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： fgNEq  
fQ<V_loP.@  
J4<- C\=4  

关键点说几个： b*$^8%  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） [;c#LJ/y  
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 Ls9G:>'rR  
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 il*bsnwpZv  

以下是几个重要的函数： T1Xm^{  
1.判断点在区域中函数  pCv=rK@  
2.计算夹角函数 k*M1m'1  
3.转置函数 Ix"uk6 h  
4.得到区域中心点，及区域半径函数 U:ZklDW  
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） N~SG=\rP;o  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 %T!UEl`v  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single oMcX{v^"  
   cax = x2 - x1 r%F{1.  
   cay = y2 - y1 aiea&aJ  
   cbx = x2 - x3 <vOljo  
   cby = y2 - y3 Aqq%HgY:t  
   mo_jj = cax * cbx + cay * cby ?mnwD]u  
   mo_ca = Sqr(cax * cax + cay * cay) $$`}b^,/  
   mo_cb = Sqr(cbx * cbx + cby * cby) X#IVjc:&L  
   cos_acb = mo_jj / (mo_ca * mo_cb) v@[MX- ,8  
   'ff_cos = cos_acb s>^*GQw  
   If cos_acb >= 1 Then [K,&s8N5  
   nn = 0 RytQNwv3  
   ElseIf cos_acb <= -1 Then R/U"]Rc  
   nn = 3.14159265258979 \3Ys8umKq  
   Else B$aboL2  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) mq>Ag  
   End If 9_oIAn:<  
   'ff_angle = nn }Z"<KF  
   ff_angle = nn * 180 / 3.14159265258979 %=%jy  
End Function

'判断点在区域内函数 0O|T\E8e  
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 PKty'}
KF  
Dim aob, boc, cod, doa, sum As Single rQ LNo,  
  If ppx = p1x And ppy = p1y Then /\(0@To  
     point_in = True 3L/>=I{5  
     Exit Function 8}nA8J  
  End If #P<v[O/rA  
  If ppx = p2x And ppy = p2y Then \,oT(p4N%M  
     point_in = True ;VNwx(1l`  
     Exit Function 79z(n[^  
  End If l0 rZril  
   If ppx = p3x And ppy = p3y Then M n3cIGL  
     point_in = True hT#[[md"  
     Exit Function }2-{4JIq}  
  End If 48Z{wV,  
     [wi "
 
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ;XRLp:y  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) fOF02WP^  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) T1LtO O  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ;a[56W  
    sum = aob + boc + cod + doa (Rve<n6{A  
    If 360.01 > sum And sum > 359.99 Then 
9Ld3  
       point_in = True &Dgho  
    Else "n=`{~F  
       point_in = False 4hr;k0sD  
    End If (G*--+Gn  
End Function

'得到点半径,得到交点坐标函数 '(7]jug  
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() x}?y@.sn8  
    '求得中心点坐标 !-m(1  
Dim tt As String G29PdmY$<  
Dim rt(3) As Single :MV]OLRM  
    '判断是否平行 7  g8SK  
   acx = p3x - p1x <=l!~~%  
   acy = p3y - p1y @TdPeTw\  
   bdx = p4x - p2x h7)^$Hd  
   bdy = p4y - p2y k3da*vwE  
   If acx * bdy = acy * bdx Then _>9|"seR  
      rt(0) = 0 a]>gDDF  
      Exit Function 3?|Fn8dQR.  
   Else (_^g:>)Cs  
      '判断斜率存在否 ka0T|$ u(s  
      If p1x = p3x And p2x <> p4x Then >JkQU e  
         tt = "ac_n_bd_y" rUvqAfE&+  
      ElseIf p1x <> p3x And p2x = p4x Then CS)&A4`8  
         tt = "ac_y_bd_n" 4_ztIrw  
      ElseIf p1x <> p3x And p2x <> p4x Then F42r]k  
         tt = "ac_y_bd_y" Z,M?!vK  
      End If VLQDktj&  
    Select Case tt '>^+_|2  
         Case "ac_n_bd_y" sU^2I v\%  
            'bd线段方程 UeIu -[R  
            k_bd = bdy / bdx hPE#l?H@A  
            b_bd = p2y - k_bd * p2x Ok/~E  
            p_x = p1x m\(4y Gj  
            p_y = k_bd * p_x + b_bd >Vy=5)/i  
         Case "ac_y_bd_n" )mz [2Sfg  
            'ac线段方程 b8P/9D7K?  
            k_ac = acy / acx zW,m3~XX:  
            b_ac = p1y - k_ac * p1x H$>D_WeJ  
            p_x = p2x %<6oKE  
            p_y = k_ac * p_x + b_ac }L^Yoq]  
        Case "ac_y_bd_y" {a.{x+!5I-  
           'ac，bd线段都要求 ~  ' 81  
           k_ac = acy / acx _A|1_^[G(  
           b_ac = p1y - k_ac * p1x yH#zyO4fD-  
           k_bd = bdy / bdx `<i|K*u  
           b_bd = p2y - k_bd * p2x Q6@}t&k4C  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) =uQCm#  
           p_y = k_ac * p_x + b_ac UK*+EEv  
        End Select sesr`,m.,  
      rt(1) = p_x oUIa/}}w5  
      rt(2) = p_y :{pvA;f  
     *[*LtyCQt4  
'计算最大半径 BQ{Gp 2N  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 3Bee6N>  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) }jBr[S5  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) l
EIX,amwa  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ~ nNsq(4  
Dim bb(5) As Single X+)68  
  bb(1) = rr1 4Z)`kS}=]  
  bb(2) = rr2 -l8n0P1+  
  bb(3) = rr3 5\8Ig f>  
  bb(4) = rr4 UeV2`zIg`  
  nb = rr1 zYO+;;*@  
For i = 1 To 4 3P3x^NI  
    If nb <= bb(i) Then XeX0\L')R  
       nb = bb(i) fIN8::Cs[  
    End If M>P-0IC  
Next i "5C)gxI^  
    rt(0) = Sqr(nb) }@=m[Zx#  
    rr = rt() Idop!b5!  
  End If S!A)kK+  
         {\[u2{  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  #8iRWm0*6  

T(zERWo  
有热压工艺方面的人才或者资料分享下； 4<g,L;pUU  
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 Lb;:<  

高手真多！

楼主威武霸气.