[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： r{\BbUnf)  
F{k$Atb?g/  
%MJL5  

关键点说几个： qib7Z]j  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） vSOT*0r  
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 6M ^IwE  
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 ^P`NMSw  

以下是几个重要的函数： FigR1/3o'6  
1.判断点在区域中函数 !(Krf  
2.计算夹角函数 7K&}C;+  
3.转置函数 V vu(`9u]  
4.得到区域中心点，及区域半径函数 Lf. 1>s  
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） nH@(Y&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 1dFa@<5  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single f1mHN7hxW  
   cax = x2 - x1 740B\pc0  
   cay = y2 - y1 -4w%I
y  
   cbx = x2 - x3 brh=NAzt  
   cby = y2 - y3 uWjN2#&,  
   mo_jj = cax * cbx + cay * cby G?`-]FMO  
   mo_ca = Sqr(cax * cax + cay * cay) j!\dn!Xwt  
   mo_cb = Sqr(cbx * cbx + cby * cby) %-+j
  
   cos_acb = mo_jj / (mo_ca * mo_cb) @x1%)1  
   'ff_cos = cos_acb 8d!GZgC8R  
   If cos_acb >= 1 Then n9%]-s\Hn  
   nn = 0 _qn?2u3mnR  
   ElseIf cos_acb <= -1 Then 6<X%\[)n  
   nn = 3.14159265258979 |;+qld[4z  
   Else BcQEG *N  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 03=5Nof1  
   End If _X4!xbP  
   'ff_angle = nn mdW~~-@H  
   ff_angle = nn * 180 / 3.14159265258979 F;8*H1  
End Function

'判断点在区域内函数 Vi?q>: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 ` qUX.  
Dim aob, boc, cod, doa, sum As Single o(!@7Lqq  
  If ppx = p1x And ppy = p1y Then &xXEnV  
     point_in = True ;AX8aw,  
     Exit Function os4{0Mxu  
  End If h!gk s-0  
  If ppx = p2x And ppy = p2y Then D:"{g|nW}  
     point_in = True ]y#3@  
     Exit Function DY\J[l<<  
  End If g^7MM
lY%  
   If ppx = p3x And ppy = p3y Then ;"kaF!  
     point_in = True t$J.+}}I  
     Exit Function PLX>-7@  
  End If CrC=A=e  
     W/fuKGZi_  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) y7/F_{  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) YJ_\Ns+Ow  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) cl@
g  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) v6GPS1:a  
    sum = aob + boc + cod + doa !cSq+eD  
    If 360.01 > sum And sum > 359.99 Then K/L;8a  
       point_in = True Y}s@WJ  
    Else 1yQejw  
       point_in = False 1oiRWRe  
    End If M|,mr~rRG  
End Function

'得到点半径,得到交点坐标函数 3"N)xO-  
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() ^r6!l.  
    '求得中心点坐标 QnQOm""  
Dim tt As String ntFT>g{B  
Dim rt(3) As Single vS\Nd1~?  
    '判断是否平行 M{g%cR0  
   acx = p3x - p1x +N`ua  
   acy = p3y - p1y aJ Z"D8C  
   bdx = p4x - p2x #>lG7Ns|4  
   bdy = p4y - p2y rf~Y
6U?7  
   If acx * bdy = acy * bdx Then u .f= te  
      rt(0) = 0 oVFnlA  
      Exit Function Q7Iw[=;\  
   Else 7lV.[&aKW  
      '判断斜率存在否 U_x)#,4  
      If p1x = p3x And p2x <> p4x Then Ar*^;/  
         tt = "ac_n_bd_y" I[)%,jd  
      ElseIf p1x <> p3x And p2x = p4x Then Wbr+KX8)  
         tt = "ac_y_bd_n" W-NDBP:  
      ElseIf p1x <> p3x And p2x <> p4x Then Q></`QWpoB  
         tt = "ac_y_bd_y" / 0 O=(  
      End If p sL?Y  
    Select Case tt c\a_VRN>r  
         Case "ac_n_bd_y" 8
YC_3Yi%  
            'bd线段方程 .7K7h^*F  
            k_bd = bdy / bdx >
pI;%'  
            b_bd = p2y - k_bd * p2x vz.>~HBP  
            p_x = p1x RuII!
}*  
            p_y = k_bd * p_x + b_bd !*RqCS,  
         Case "ac_y_bd_n" Cj~'Lhmv'T  
            'ac线段方程 [!!Q,S"  
            k_ac = acy / acx Tg!m`9s+  
            b_ac = p1y - k_ac * p1x '%q$`KDb  
            p_x = p2x h1'\:N`  
            p_y = k_ac * p_x + b_ac Ym3\pRFiD  
        Case "ac_y_bd_y" 9$2/MT't  
           'ac，bd线段都要求 CHe>OreiS  
           k_ac = acy / acx "g$IP9?U  
           b_ac = p1y - k_ac * p1x +
$g}4  
           k_bd = bdy / bdx phM>.y_  
           b_bd = p2y - k_bd * p2x ep)>X@t  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ,l<6GB2\  
           p_y = k_ac * p_x + b_ac B95B|tU>.  
        End Select ")d`dj\o  
      rt(1) = p_x 0`^&9nR  
      rt(2) = p_y z^T`x_mF  
     Q~Hy%M%R3  
'计算最大半径 (1#J%  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) rqY`8Ry2M  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) l1f\=G?tmU  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) h*-Pr8  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ."9];)2rx  
Dim bb(5) As Single gLOEh6  
  bb(1) = rr1 /5u<78GW1  
  bb(2) = rr2 j KoG7HH  
  bb(3) = rr3 rk #sy$  
  bb(4) = rr4 @)fd}tV  
  nb = rr1 ZpnxecJUJ  
For i = 1 To 4 R6]
Gk)
5  
    If nb <= bb(i) Then :Of^xj>
A  
       nb = bb(i) UEguF&  
    End If \--8lH -K  
Next i "'t0h{Wr8  
    rt(0) = Sqr(nb) u fw]=h)  
    rr = rt() #w' k
V#  
  End If +mn,F};  
         N<XNTf  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  1WxK#c-)  

Vc\MV0lr  
有热压工艺方面的人才或者资料分享下； 6xTuNE1  
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 X86O lP)eX  

高手真多！

楼主威武霸气.