[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： }Ll3AR7\  
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关键点说几个： /v bO/Mr  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） /8$1[[[  
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 F)E7(Un`8  
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 .kB3jfw0,  

以下是几个重要的函数： {o
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1.判断点在区域中函数 GhgvRR$  
2.计算夹角函数 :_~PU$%0  
3.转置函数 4M0
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4.得到区域中心点，及区域半径函数 tZNad  
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） [#Nx>RY  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 #Lxj )  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single #Rm=Em}d  
   cax = x2 - x1 Q5Ghki  
   cay = y2 - y1 S^Wqa:;  
   cbx = x2 - x3 }_kI>  
   cby = y2 - y3 aD/,c1  
   mo_jj = cax * cbx + cay * cby MY<!\4/  
   mo_ca = Sqr(cax * cax + cay * cay) dT,m{[+  
   mo_cb = Sqr(cbx * cbx + cby * cby) WlQ&Yau  
   cos_acb = mo_jj / (mo_ca * mo_cb)
_[OEE<(  
   'ff_cos = cos_acb Wse*gO  
   If cos_acb >= 1 Then E]eqvTNH  
   nn = 0 /"
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   ElseIf cos_acb <= -1 Then RkH oT^  
   nn = 3.14159265258979 v/TlXxfil  
   Else E=1/  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) zWmo OnK  
   End If l3pW{p  
   'ff_angle = nn q=0{E0@9({  
   ff_angle = nn * 180 / 3.14159265258979 Yqhz(&*)  
End Function

'判断点在区域内函数 komxot[[  
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 f({-j%m  
Dim aob, boc, cod, doa, sum As Single HAU
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  If ppx = p1x And ppy = p1y Then m2< *  
     point_in = True 7F9g:r/^  
     Exit Function gS<{ekN  
  End If R EH&kcn  
  If ppx = p2x And ppy = p2y Then Lz>{FOR  
     point_in = True `~+a=Q  
     Exit Function .6Lhy3x  
  End If ttq< )4  
   If ppx = p3x And ppy = p3y Then `:BQ&T%UQR  
     point_in = True ; 7v7V  
     Exit Function rIWN!@.J  
  End If -MW(={#  
     9oxf)pjw  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ]-Y]Q%A4  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) {_X1&&>8/  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) rB&j"p}Q  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y)  H[!Q  
    sum = aob + boc + cod + doa K84cE  
    If 360.01 > sum And sum > 359.99 Then 6M vRR  
       point_in = True ;s B:s9M  
    Else rMg{j gD  
       point_in = False Hkz~9p  
    End If mF:s-+  
End Function

'得到点半径,得到交点坐标函数 +P)[|y +e  
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() ne24QZ~}  
    '求得中心点坐标 nC{rs+P
 
Dim tt As String ~+iJp
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Dim rt(3) As Single $`dNl#G,  
    '判断是否平行 wp GnS  
   acx = p3x - p1x M9jo<+  
   acy = p3y - p1y s=Q*|  
   bdx = p4x - p2x '2J6%Gg  
   bdy = p4y - p2y U\ E{-7  
   If acx * bdy = acy * bdx Then (tLQX~Ur  
      rt(0) = 0 i\4"FO?v  
      Exit Function XaS_3d  
   Else 8*~:gZ7:  
      '判断斜率存在否 f4y;K>u7p  
      If p1x = p3x And p2x <> p4x Then z'D{:q  
         tt = "ac_n_bd_y" Zy3&Zt  
      ElseIf p1x <> p3x And p2x = p4x Then x[~OVG0M*  
         tt = "ac_y_bd_n" Fj('l  
      ElseIf p1x <> p3x And p2x <> p4x Then ~#km0<r?  
         tt = "ac_y_bd_y" i[^lJ)[>N  
      End If U5$DJ5>8  
    Select Case tt GJ_)Cl+5E  
         Case "ac_n_bd_y" EAE\Xv  
            'bd线段方程 }w^ T9OC  
            k_bd = bdy / bdx j/mp.'P1k  
            b_bd = p2y - k_bd * p2x +5|nCp6||j  
            p_x = p1x D2cIVx3:(  
            p_y = k_bd * p_x + b_bd 2
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         Case "ac_y_bd_n" LP6FSo~K  
            'ac线段方程 Z?aR9OTP  
            k_ac = acy / acx 6|qvo+%  
            b_ac = p1y - k_ac * p1x $#W6z:  
            p_x = p2x VgTI2  
            p_y = k_ac * p_x + b_ac 'J0s%m|j  
        Case "ac_y_bd_y" _W@Fk)E6N  
           'ac，bd线段都要求 :bDn.`KG#  
           k_ac = acy / acx R eu J=|F  
           b_ac = p1y - k_ac * p1x D % ,yA  
           k_bd = bdy / bdx ?JTyNg4<  
           b_bd = p2y - k_bd * p2x Y]Vc}-a(h  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) E!l1a5qB  
           p_y = k_ac * p_x + b_ac PR6uw  
        End Select koY8=lh/  
      rt(1) = p_x NRF%Qd8I/2  
      rt(2) = p_y cP=mJ1  
     LK/V]YG  
'计算最大半径 )stWr r&  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 8'Bl=C|0X  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) lj*913aFh  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) :I(gz~u6  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Nb^:_0&H@  
Dim bb(5) As Single dk`!UtNNRa  
  bb(1) = rr1 <qY>d,+E'  
  bb(2) = rr2 #%tL8/K*  
  bb(3) = rr3 [4rMUS7-m"  
  bb(4) = rr4 &'\+Z  
  nb = rr1 b/Q"j3
 
For i = 1 To 4 /O9EI'40)  
    If nb <= bb(i) Then !sQ8,l0h  
       nb = bb(i) ua-|4@YO  
    End If >g0@ Bk  
Next i .3&OFM  
    rt(0) = Sqr(nb) {;M/J  
    rr = rt() q\Kdu5x{  
  End If H,` XCG  
         Y!$z7K  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  s]OXB {M  

m^KkS  
有热压工艺方面的人才或者资料分享下； :Fl:bRH+  
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 2=RDAipf59  

高手真多！

楼主威武霸气.