[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： [Auc*@  
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关键点说几个： pw;r 25   
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） #B}Qt5w  
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  mmcdtVe  
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 h"8QeX:((  

以下是几个重要的函数： Th/{x h  
1.判断点在区域中函数 Ph Ttx(!  
2.计算夹角函数 Oa1'oYIHg  
3.转置函数 k{{hZ/om  
4.得到区域中心点，及区域半径函数 2!idy]vy_  
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） Br&^09S  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 19) !$Hl  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single F0&O/-w&u  
   cax = x2 - x1 *k4+ioFnKE  
   cay = y2 - y1 5v+L';wx[T  
   cbx = x2 - x3 6: GN(R$0  
   cby = y2 - y3 ~hzEKvs  
   mo_jj = cax * cbx + cay * cby wcl!S
{  
   mo_ca = Sqr(cax * cax + cay * cay) h&P {p _Y  
   mo_cb = Sqr(cbx * cbx + cby * cby) &8afl"_~  
   cos_acb = mo_jj / (mo_ca * mo_cb) ozuIwzi7N  
   'ff_cos = cos_acb "5h_8k~sQ  
   If cos_acb >= 1 Then  +xq=<jy  
   nn = 0 T1bFxim#b  
   ElseIf cos_acb <= -1 Then I^@.Awt  
   nn = 3.14159265258979 ~Zu}M>-^c,  
   Else 0H<4+ *`K  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) LC76Qi;|k  
   End If {>A
8g({i  
   'ff_angle = nn 9j2\y=<&  
   ff_angle = nn * 180 / 3.14159265258979 Bqp&2zg)@  
End Function

'判断点在区域内函数 $CM4&{B"i  
Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean T6;>O`B.r  
Dim aob, boc, cod, doa, sum As Single \3M1.Q4$Gr  
  If ppx = p1x And ppy = p1y Then +*<K"H|,  
     point_in = True ?f9$OLEB  
     Exit Function uFWvtL?;_  
  End If W!y)Ho  
  If ppx = p2x And ppy = p2y Then wD}EW  
     point_in = True BJ"Ay@D*  
     Exit Function VGfD;8]z  
  End If f7S^yA[[  
   If ppx = p3x And ppy = p3y Then tG_-;03<`4  
     point_in = True 3JTU^-S<  
     Exit Function S7Qen6lm  
  End If UUD\bWfn  
     q;KshpfRMD  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 2}597Hb   
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y)  K
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    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) o%$<LaQG5  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) FW/)uf3I  
    sum = aob + boc + cod + doa |b,zw^!e['  
    If 360.01 > sum And sum > 359.99 Then MwN1]d|6  
       point_in = True r,QJG$ Jo  
    Else py}.00it  
       point_in = False dy'X<o^?W  
    End If )Gx": D  
End Function

'得到点半径,得到交点坐标函数 ^u=PdBY  
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() e=0l<Rj  
    '求得中心点坐标 S83]O!w0  
Dim tt As String WNCM|VUl  
Dim rt(3) As Single u XaL  
    '判断是否平行 XB6N[E  
   acx = p3x - p1x k];L!Fj1  
   acy = p3y - p1y *7)S%r,?  
   bdx = p4x - p2x bCH*8,Bmh  
   bdy = p4y - p2y |TC3*Y  
   If acx * bdy = acy * bdx Then aE%eJ)+K  
      rt(0) = 0 ru#T^AI*^  
      Exit Function 2O}s*C$Xav  
   Else GZxglU,3T  
      '判断斜率存在否 Q>cL?ie  
      If p1x = p3x And p2x <> p4x Then %ZJ),9+  
         tt = "ac_n_bd_y" WHZe)|n  
      ElseIf p1x <> p3x And p2x = p4x Then C}t+t  
         tt = "ac_y_bd_n" a15,'v$O  
      ElseIf p1x <> p3x And p2x <> p4x Then zpBBnlq  
         tt = "ac_y_bd_y" -='8_B/75  
      End If ex0 kb  
    Select Case tt =1V>Vd?8.  
         Case "ac_n_bd_y" &':UlzG  
            'bd线段方程 :u[ oc.  
            k_bd = bdy / bdx !7kAJG g  
            b_bd = p2y - k_bd * p2x IMl9\U  
            p_x = p1x 'vqj5YTj  
            p_y = k_bd * p_x + b_bd zav*  
         Case "ac_y_bd_n" f\U?:83  
            'ac线段方程 
D5o+0R  
            k_ac = acy / acx ;m2"cL>{l  
            b_ac = p1y - k_ac * p1x ~(Ih~/5\^  
            p_x = p2x c,g]0S?gu  
            p_y = k_ac * p_x + b_ac nR=2eBNf  
        Case "ac_y_bd_y" +An![1N,  
           'ac，bd线段都要求 mcAH1k e  
           k_ac = acy / acx [R@q]S/  
           b_ac = p1y - k_ac * p1x <lg"M;&Ht  
           k_bd = bdy / bdx "jkw8UVz  
           b_bd = p2y - k_bd * p2x q?e16M  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 0ECO/EuCg  
           p_y = k_ac * p_x + b_ac M]%!n3Fb  
        End Select 1FXzAc(c!  
      rt(1) = p_x ZmYa.4'L  
      rt(2) = p_y IPr*pQ{;c  
     %^Q@*+{:f  
'计算最大半径 OuYE-x2]x"  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) u"Hd55"&  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) )-TeDIfm  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) b3CspBgC  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) '6dD^0dZ  
Dim bb(5) As Single `-9*@_-=M  
  bb(1) = rr1 #J<`p  
  bb(2) = rr2 s)`1Rf  
  bb(3) = rr3 _{Fdw  
  bb(4) = rr4 J*^,l`C/  
  nb = rr1 SSA%1l2!  
For i = 1 To 4 ],fwZd[t  
    If nb <= bb(i) Then r(?'Yy  
       nb = bb(i) Fw_bY/WN{  
    End If ZmR[5 mv@  
Next i rSc,\upz  
    rt(0) = Sqr(nb) toYg$IV  
    rr = rt() /4wm}g9  
  End If mBD!:V'  
         )N%1%bg^-  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  4k
Y{X%9
 

^N}~U5  
有热压工艺方面的人才或者资料分享下； [m+O0VK$  
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 "a`0w9Mm}  

高手真多！

楼主威武霸气.