[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： 8 Hn{CJ~'  
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关键点说几个： ?H&p zY~H  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） vkK+ C~"  
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 (L1`]cp  
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 x3Uv&  

以下是几个重要的函数： d:D2[  
1.判断点在区域中函数 !Xm:$KH  
2.计算夹角函数 B.?yHaMI
[  
3.转置函数 5IMH G%W7  
4.得到区域中心点，及区域半径函数 d
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5.再有就是若干个点抽取其中一部分；或者采用随机分布（该方法会有重合点，所以没采用） hk I$ow(  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 -cKR15  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single <LJ$GiU  
   cax = x2 - x1 ;VuIQ*@m"  
   cay = y2 - y1 URAipLvN  
   cbx = x2 - x3 3{ci]h`:y8  
   cby = y2 - y3 ciTQH
(G  
   mo_jj = cax * cbx + cay * cby .#n?^73  
   mo_ca = Sqr(cax * cax + cay * cay) f_7p.H6\  
   mo_cb = Sqr(cbx * cbx + cby * cby) )d(cXN-T  
   cos_acb = mo_jj / (mo_ca * mo_cb) Z8T{Xw6%  
   'ff_cos = cos_acb *%O1d.,  
   If cos_acb >= 1 Then
8<^,<?  
   nn = 0 :.dQY=6I  
   ElseIf cos_acb <= -1 Then
)oj`K,#  
   nn = 3.14159265258979 c|7Pnx%gT  
   Else HiC\U%We  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) L4NC-  
   End If 0^m02\Li  
   'ff_angle = nn UW+I 8\^  
   ff_angle = nn * 180 / 3.14159265258979 8p FSm>  
End Function

'判断点在区域内函数 +o/q@&v;Ax  
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=f+4j  
Dim aob, boc, cod, doa, sum As Single ~DJ/sY2/  
  If ppx = p1x And ppy = p1y Then l- X|3,  
     point_in = True  u(BYRB  
     Exit Function r[gV`khka  
  End If {<GsM  
  If ppx = p2x And ppy = p2y Then 
8ZN J}  
     point_in = True a%AU9?/q#  
     Exit Function iz'8P-]K>  
  End If >fjf] 6  
   If ppx = p3x And ppy = p3y Then b#P8Je`;9  
     point_in = True p?}Rolk7  
     Exit Function &~k/G  
  End If 3oSQe"  
     Ki'EO$  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) EGs z{c[8@  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Kg.E~  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) nyIb
8=f  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) aA:Ky&5e  
    sum = aob + boc + cod + doa D^A_0@  
    If 360.01 > sum And sum > 359.99 Then ht1 jrCe  
       point_in = True 9@h>_1RJz  
    Else 6G(k{S  
       point_in = False v9<p@GY"\  
    End If )Q
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End Function

'得到点半径,得到交点坐标函数 i}q6^;uTF  
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() D.HAp+lx  
    '求得中心点坐标 Edjh

*  
Dim tt As String <cl$?].RE!  
Dim rt(3) As Single 9 Iw+g]`y*  
    '判断是否平行 I\[*vgjm3G  
   acx = p3x - p1x E=LaPjEIj  
   acy = p3y - p1y H(0d(c1s  
   bdx = p4x - p2x J+9D/VT  
   bdy = p4y - p2y 9J>DLvl;  
   If acx * bdy = acy * bdx Then QJv,@@mu  
      rt(0) = 0 5Wn6a$^  
      Exit Function x.d9mjLN8m  
   Else ncWASw`  
      '判断斜率存在否  fBQZ=zh  
      If p1x = p3x And p2x <> p4x Then i4->XvC  
         tt = "ac_n_bd_y" V-jo2+Y5=  
      ElseIf p1x <> p3x And p2x = p4x Then {2V=BDS|?K  
         tt = "ac_y_bd_n" T*$uc,  
      ElseIf p1x <> p3x And p2x <> p4x Then p<jHUG4?'  
         tt = "ac_y_bd_y" E P<U:F  
      End If jSddjs  
    Select Case tt Z3S\@_/;  
         Case "ac_n_bd_y" A?_2@6Y^  
            'bd线段方程 /A_ IS`  
            k_bd = bdy / bdx GM@TWwG-B  
            b_bd = p2y - k_bd * p2x 7C&
`i}/t  
            p_x = p1x ,x_g|J _Y  
            p_y = k_bd * p_x + b_bd bjR&bIA:  
         Case "ac_y_bd_n" -,Q<*)q{  
            'ac线段方程 PZ"xW0"-  
            k_ac = acy / acx eNXpRvY  
            b_ac = p1y - k_ac * p1x 1Ce:<.99B  
            p_x = p2x f(9w FT  
            p_y = k_ac * p_x + b_ac ~kYF/B2*  
        Case "ac_y_bd_y" @w2}WX>  
           'ac，bd线段都要求 [T
NYPA>{  
           k_ac = acy / acx 2!jbaSH(+  
           b_ac = p1y - k_ac * p1x C@KYg/nYw  
           k_bd = bdy / bdx Bw{W-&$o  
           b_bd = p2y - k_bd * p2x ^%\p; yhL  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 8y+Gvk:  
           p_y = k_ac * p_x + b_ac ~L?p/3m   
        End Select L*FnFRhU  
      rt(1) = p_x (L~3nN;rr  
      rt(2) = p_y \Ud2]^D=  
     y_J{+  
'计算最大半径 Jq.26I=  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) S:DB%V3  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) dAga(<K  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) N["(ZSS   
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) =lV
frna  
Dim bb(5) As Single m@jOIt!<  
  bb(1) = rr1 lMP|$C  
  bb(2) = rr2 @ cv`}k  
  bb(3) = rr3 q.MM|;_u`  
  bb(4) = rr4
71wyZJ  
  nb = rr1 4,)=r3;&!  
For i = 1 To 4 N\H(AzMw  
    If nb <= bb(i) Then ujwI4oj"c  
       nb = bb(i) %d*}:295  
    End If /wIZ '  
Next i ukri7 n
*  
    rt(0) = Sqr(nb) G-
rN?R.  
    rr = rt() )L_jR%2j  
  End If ^B5Hjf9  
         ^GL0|G=(1  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  d0|Q1R+3  

x+%lNR  
有热压工艺方面的人才或者资料分享下； I%pQ2T$;  
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 V@T G"YF  

高手真多！

楼主威武霸气.