[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： vx9!KWy}  
=2&\<Q_Fi  
8~(xi<"e  

关键点说几个： KSs1EmB  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） o^epXIrIPi  
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 ^t'mW;C$4  
3.网点区域密度可调；把区域分成若干小块，每块的密度不同即可 {($bzT7c  

以下是几个重要的函数： :lai0> D  
1.判断点在区域中函数 -f|/#1  
2.计算夹角函数 k1,k 9BK  
3.转置函数 jgE{JK\n4  
4.得到区域中心点，及区域半径函数 Lc~m`=B  
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） M!6Fnj  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 !5dn7Wuj  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single u[qy1M0  
   cax = x2 - x1 =\]gL%N-|  
   cay = y2 - y1 -=lm`X<:  
   cbx = x2 - x3 W $D 34(  
   cby = y2 - y3 9SeGkwec?$  
   mo_jj = cax * cbx + cay * cby .45wwouZkc  
   mo_ca = Sqr(cax * cax + cay * cay) p>)1Z<D"a  
   mo_cb = Sqr(cbx * cbx + cby * cby) -}m  
   cos_acb = mo_jj / (mo_ca * mo_cb) ai;!Q%B#Q  
   'ff_cos = cos_acb W^elzN(  
   If cos_acb >= 1 Then 0c>>:w20D  
   nn = 0 r^"o!,H9q  
   ElseIf cos_acb <= -1 Then b!g)/%C  
   nn = 3.14159265258979 aKMX-?%t4  
   Else O5du3[2x7a  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) #xmiUN,|  
   End If ?e-rwaW  
   'ff_angle = nn *?Eu{J){7%  
   ff_angle = nn * 180 / 3.14159265258979 >> cW0I/`  
End Function

'判断点在区域内函数 ?bd!JW bg`  
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 h`fZ8|yw  
Dim aob, boc, cod, doa, sum As Single 5%S5*c6BD  
  If ppx = p1x And ppy = p1y Then b5g^{bzwu  
     point_in = True ip'v<%,Q3"  
     Exit Function 8;=?F>]xn  
  End If &h[)nD  
  If ppx = p2x And ppy = p2y Then Ew}G
PJ  
     point_in = True |QzJHP @  
     Exit Function aJm5`az)  
  End If sUF5Yq:9  
   If ppx = p3x And ppy = p3y Then _BG`!3U+  
     point_in = True _6FDuCVD-  
     Exit Function dY?l oFz  
  End If Q m9b:U~  
     w}}+8mk[  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 9F,XjPK
=  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) IwFf8? 3  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Qvny$sr
2  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) l$BKE{rg  
    sum = aob + boc + cod + doa ~l+~MB  
    If 360.01 > sum And sum > 359.99 Then rGH7S!\AM  
       point_in = True >y+j!)\  
    Else M]\"]H?  
       point_in = False JmF`5  
    End If IKp(KlA  
End Function

'得到点半径,得到交点坐标函数 h^9Ne/s~  
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() ;c~DBJg'|  
    '求得中心点坐标 RDG,f/L2  
Dim tt As String ZG)C#I1;O  
Dim rt(3) As Single F0NNS!WP7^  
    '判断是否平行 Q~*3Z4)j  
   acx = p3x - p1x ]  )x z  
   acy = p3y - p1y Z.LF5ur  
   bdx = p4x - p2x \b88=^  
   bdy = p4y - p2y [/t/694  
   If acx * bdy = acy * bdx Then "ZVBn!  
      rt(0) = 0 ZoC?9=k  
      Exit Function CtDS lJ  
   Else X'bp?m  
      '判断斜率存在否 J2#=`|t"  
      If p1x = p3x And p2x <> p4x Then ZsPBs4<p  
         tt = "ac_n_bd_y" Ah2XwFg?  
      ElseIf p1x <> p3x And p2x = p4x Then +ACV,GG  
         tt = "ac_y_bd_n" nBiA=+'v  
      ElseIf p1x <> p3x And p2x <> p4x Then 7e#|=e *I!  
         tt = "ac_y_bd_y" ELNA-ZKp  
      End If Hp> J,m(*  
    Select Case tt skP_us~  
         Case "ac_n_bd_y" f{z%PI[  
            'bd线段方程 "/XS3sv"s  
            k_bd = bdy / bdx <^ )0M  
            b_bd = p2y - k_bd * p2x -+I! (?  
            p_x = p1x vDOeBw=  
            p_y = k_bd * p_x + b_bd dl$l5z\  
         Case "ac_y_bd_n" <u($!ATb  
            'ac线段方程 U14dQ=~b/  
            k_ac = acy / acx VZlvmN  
            b_ac = p1y - k_ac * p1x 2Nl("e^kJr  
            p_x = p2x S(-=I!.G{  
            p_y = k_ac * p_x + b_ac ^lMnwqx<  
        Case "ac_y_bd_y" +#H8d1^5  
           'ac，bd线段都要求 01q7n`o#zf  
           k_ac = acy / acx J2[QHr&tn  
           b_ac = p1y - k_ac * p1x o-'i)pp  
           k_bd = bdy / bdx .y2<2eW  
           b_bd = p2y - k_bd * p2x >qUO_>  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) '}YXpB  
           p_y = k_ac * p_x + b_ac (1}Ndo^;w  
        End Select YL=k&QG  
      rt(1) = p_x quUJ%F  
      rt(2) = p_y E:E&Wv?r  
     $-AvH(@  
'计算最大半径 n0i&P
9@B1  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) qiF~I0_
0  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) -MEz`7c~  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) h'fD3Gr&  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ~D=@4(f8|  
Dim bb(5) As Single EhUy7b,1_  
  bb(1) = rr1 9FLn7Y  
  bb(2) = rr2 f}'gg  
  bb(3) = rr3 i:8^:(i  
  bb(4) = rr4 TgB;R5  
  nb = rr1 \j;uN#)28  
For i = 1 To 4 c_
a$g  
    If nb <= bb(i) Then Y-c~"#  
       nb = bb(i) ;VFr5.*x  
    End If g^4FzJ  
Next i -pGt;  
    rt(0) = Sqr(nb) omA*XXUx=8  
    rr = rt() 0amz#VIB<u  
  End If )|a9Z~#x  
         Mqtp}<*@-  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  np^<HfYV  

a?~csP^?}  
有热压工艺方面的人才或者资料分享下； u/c3omY"#  
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 9nS!  

高手真多！

楼主威武霸气.