[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： IF]lHB  
CR2_;x:0  

描述:请输入描述

图片:2.jpg

rpw.]vnn  

关键点说几个： ""Q1|  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） #lU9yv  
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 1,5E`J  
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 sZ?mP;Q  

以下是几个重要的函数： c)0amM  
1.判断点在区域中函数 I}2P>)K  
2.计算夹角函数 jmg!Ml  
3.转置函数 ^T~gEv  
4.得到区域中心点，及区域半径函数 ~zHg[X*  
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） \n9zw'  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ,7XtH>2s  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single g/CxXSv@0  
   cax = x2 - x1 ^s.V;R  
   cay = y2 - y1 #yI.nzA*  
   cbx = x2 - x3 5d@t7[]  
   cby = y2 - y3 lcV<MDS  
   mo_jj = cax * cbx + cay * cby D#S\!>m  
   mo_ca = Sqr(cax * cax + cay * cay) flgRpXt  
   mo_cb = Sqr(cbx * cbx + cby * cby) dz>;<&2Z  
   cos_acb = mo_jj / (mo_ca * mo_cb) !.1%}4@Q]  
   'ff_cos = cos_acb |w}xl'>q  
   If cos_acb >= 1 Then CQ;]J=|<_  
   nn = 0 HG'{J^t  
   ElseIf cos_acb <= -1 Then L !4t[hhe=  
   nn = 3.14159265258979 a^5^gId5l!  
   Else 0b91y3R+  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) r}yG0c,  
   End If 1y^K/.5-  
   'ff_angle = nn {A|TowBN  
   ff_angle = nn * 180 / 3.14159265258979 /m _kn  
End Function

'判断点在区域内函数 :Sg_tOf  
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 x]5@>5  
Dim aob, boc, cod, doa, sum As Single J
N6-Z2  
  If ppx = p1x And ppy = p1y Then KNgH|5Pb  
     point_in = True '2zL.:~  
     Exit Function fQ>4MKLw=d  
  End If :T3/yd62N  
  If ppx = p2x And ppy = p2y Then \RQ='/H*  
     point_in = True eK/?%t  
     Exit Function aj,)P3DJu  
  End If ]<DNo&fw  
   If ppx = p3x And ppy = p3y Then 9s +z B  
     point_in = True _B2V "p  
     Exit Function R6 XuA(5  
  End If acd:r%y  
     E99CmG|"  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 6pE :A@  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) =G~~?>=@2  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) c':ezEaC  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) BcA31%  
    sum = aob + boc + cod + doa /W#O +  
    If 360.01 > sum And sum > 359.99 Then
[=*E+Oc  
       point_in = True q^rl)  
    Else AgF5-tz6x  
       point_in = False !~<siy  
    End If N12:{U  
End Function

'得到点半径,得到交点坐标函数 LE?u`i,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() i`%
.  
    '求得中心点坐标 T#:F]=  
Dim tt As String &;H{cv`  
Dim rt(3) As Single e1 *__'  
    '判断是否平行 ")s!L"x  
   acx = p3x - p1x 5T4"j;_.BL  
   acy = p3y - p1y dw@E)  
   bdx = p4x - p2x cTZ)"^z!  
   bdy = p4y - p2y PX".Km p.  
   If acx * bdy = acy * bdx Then z)F#u:t  
      rt(0) = 0 KGZ?b2N?Va  
      Exit Function hQJWKAf,/  
   Else Tc ZnmN  
      '判断斜率存在否 yt.c5>B^  
      If p1x = p3x And p2x <> p4x Then >e5zrgV  
         tt = "ac_n_bd_y" dhRJg"vrQ  
      ElseIf p1x <> p3x And p2x = p4x Then 0/]_nd  
         tt = "ac_y_bd_n" urY`^lX~  
      ElseIf p1x <> p3x And p2x <> p4x Then 2xmk,&s  
         tt = "ac_y_bd_y" EiV=RdL  
      End If w`yx=i#  
    Select Case tt "2n;3ByR  
         Case "ac_n_bd_y" ucg$Ed  
            'bd线段方程 DM7}&~  
            k_bd = bdy / bdx G=M]
8+h  
            b_bd = p2y - k_bd * p2x m>Ux`Gp+  
            p_x = p1x PNF4>)  
            p_y = k_bd * p_x + b_bd AfWl6a?T8:  
         Case "ac_y_bd_n" Ph7pd  
            'ac线段方程 ]H2R  
            k_ac = acy / acx 993d/z|DX  
            b_ac = p1y - k_ac * p1x }F{=#Kqn^  
            p_x = p2x R$b,h  
            p_y = k_ac * p_x + b_ac I"!'AI-  
        Case "ac_y_bd_y" y~#\#w{  
           'ac，bd线段都要求 *M!kA65'  
           k_ac = acy / acx <GWR7rUH  
           b_ac = p1y - k_ac * p1x LZWS^77  
           k_bd = bdy / bdx {Qtq7q.  
           b_bd = p2y - k_bd * p2x oW'POAr  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) D?u`  
           p_y = k_ac * p_x + b_ac ]UUI~sFE  
        End Select A|vP$zy  
      rt(1) = p_x *m_93J  
      rt(2) = p_y yuNfhK/#r  
     hYvNcOSks  
'计算最大半径 >a]t<  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) F/<qE!(  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) (L#%!bd  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) \.>.c g  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 8$ DwpJ  
Dim bb(5) As Single *C_[jk@6  
  bb(1) = rr1 ^pcRW44K  
  bb(2) = rr2 ^@_).:oX7  
  bb(3) = rr3 KSOO?X0j  
  bb(4) = rr4 N#Ag'i4HF  
  nb = rr1 xURw,  
For i = 1 To 4 xYT}
>#[  
    If nb <= bb(i) Then <ZrFOb  
       nb = bb(i) 7zI5PGWw  
    End If P0#`anUr1  
Next i vvh.@f  
    rt(0) = Sqr(nb) ^gm>!-Gx  
    rr = rt() Iq,v  
  End If }J;~P 9Y  
         ??I:H  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  xNx`J@xt$  

#e*$2+`[A  
有热压工艺方面的人才或者资料分享下； y "<JE<X  
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 2t.fD@  

高手真多！

楼主威武霸气.