[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： ~>N63I6  
DJ
*mWi.  
*{P/3
yH  

关键点说几个： PR]b]=  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） }i,r{Y]s]  
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 JXMH7  
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 zj(V\y&H  

以下是几个重要的函数： mLpM8~L  
1.判断点在区域中函数 A=5Ebu!z  
2.计算夹角函数 ,oh;(|=  
3.转置函数 8I*N  
4.得到区域中心点，及区域半径函数 $xbW*w  
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） \ ZE[7Ae  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 *dw.Ug  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single |Ia9bg'1U  
   cax = x2 - x1 GPK\nz
}  
   cay = y2 - y1 r+8D|stS  
   cbx = x2 - x3 F{!pii5O9  
   cby = y2 - y3 CpmT*  
   mo_jj = cax * cbx + cay * cby z&t
C5]#  
   mo_ca = Sqr(cax * cax + cay * cay) Bskp&NV':  
   mo_cb = Sqr(cbx * cbx + cby * cby) ,`Y$}"M4  
   cos_acb = mo_jj / (mo_ca * mo_cb) %&yPl{  
   'ff_cos = cos_acb ro\oL  
   If cos_acb >= 1 Then U:C:ugm  
   nn = 0 y'`/^>.  
   ElseIf cos_acb <= -1 Then V7Cnu:0_  
   nn = 3.14159265258979 LCH\;07V#  
   Else cQyN@W  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) .Mb[j1L^  
   End If :86:U 0^  
   'ff_angle = nn rBNVI;JZW  
   ff_angle = nn * 180 / 3.14159265258979 <3x%-m+p4  
End Function

'判断点在区域内函数 ],pB:=  
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 *y?HaU  
Dim aob, boc, cod, doa, sum As Single 8m?(* [[  
  If ppx = p1x And ppy = p1y Then A~bSB n: '  
     point_in = True LJGpa)(  
     Exit Function k.ou$mIY  
  End If lx%c&~.DiB  
  If ppx = p2x And ppy = p2y Then U`ttT5;  
     point_in = True I?3b}#&V9  
     Exit Function <|}Z6Ti  
  End If e$Ds2%SaT  
   If ppx = p3x And ppy = p3y Then _xaum  
     point_in = True #T_!-;(Z  
     Exit Function Uz^N6q  
  End If #&}- q RA  
     vn^O m-\  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) K {' atc  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) q!z"YpYB  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 8(%F{&<;  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) )A7^LLzG  
    sum = aob + boc + cod + doa rUb{iU;~m  
    If 360.01 > sum And sum > 359.99 Then ZL6HD n!  
       point_in = True gu(:'5cX  
    Else /:4J  
       point_in = False )/$J$'mcxd  
    End If ]!B0= XP  
End Function

'得到点半径,得到交点坐标函数 Te+(7 Z  
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;pI!S<#  
    '求得中心点坐标 odhS0+d^  
Dim tt As String %;'~TtW5  
Dim rt(3) As Single 6<];}M_{  
    '判断是否平行 v1OVrk>s>  
   acx = p3x - p1x >3uNh:|>/  
   acy = p3y - p1y /mex{+p>tO  
   bdx = p4x - p2x _Vr- bpAf  
   bdy = p4y - p2y C t,p  
   If acx * bdy = acy * bdx Then 9&Jf4lC94  
      rt(0) = 0 "JB4Uaa  
      Exit Function RpivO,   
   Else 6m:$mhA5  
      '判断斜率存在否 DhyR
 
      If p1x = p3x And p2x <> p4x Then b)d;eS  
         tt = "ac_n_bd_y" fN&\8SPE  
      ElseIf p1x <> p3x And p2x = p4x Then E!9WZY  
         tt = "ac_y_bd_n" %biie  
      ElseIf p1x <> p3x And p2x <> p4x Then g<j)   
         tt = "ac_y_bd_y" [CJ<$R !  
      End If fqgp{(`@>  
    Select Case tt M
GR:IOTa  
         Case "ac_n_bd_y" 7iP+!e}$.  
            'bd线段方程 k
eAoJeG,J  
            k_bd = bdy / bdx a{nR:zPE  
            b_bd = p2y - k_bd * p2x ?\V#^q-  
            p_x = p1x U,=f};  
            p_y = k_bd * p_x + b_bd 3`^@
ymY  
         Case "ac_y_bd_n" +S4n416K  
            'ac线段方程  i0=U6S:#  
            k_ac = acy / acx dCd~]CI  
            b_ac = p1y - k_ac * p1x 4?R979  
            p_x = p2x _,J+b R+b  
            p_y = k_ac * p_x + b_ac EF`}*7)  
        Case "ac_y_bd_y" P.]h`4  
           'ac，bd线段都要求 A=N$5ZJ  
           k_ac = acy / acx <s9{o uZ  
           b_ac = p1y - k_ac * p1x U^dfNi@q  
           k_bd = bdy / bdx h:aa^a~yi  
           b_bd = p2y - k_bd * p2x sW]_Ky.]  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) LikcW#  
           p_y = k_ac * p_x + b_ac m!<HZvq?vf  
        End Select mku@n;Hl_  
      rt(1) = p_x xKUL}>8  
      rt(2) = p_y mLhM_=  
     K[z)ts-  
'计算最大半径 PgkU~68`  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) j"qND=15  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) \&Yn)|!  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) !.vyzCJTzB  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) HRf;bKZ  
Dim bb(5) As Single  mwAN9<o  
  bb(1) = rr1 bU=Utniq  
  bb(2) = rr2 X1@DI_  
  bb(3) = rr3 | b'Ut)E  
  bb(4) = rr4 KQ\K:#  
  nb = rr1 x92^0cMf  
For i = 1 To 4 $[|(&8+7  
    If nb <= bb(i) Then o[ 5dR<  
       nb = bb(i) qf? "v;  
    End If FZi@h  
Next i f$lb
.fy5  
    rt(0) = Sqr(nb) cN,*QN  
    rr = rt() )3h\QE!z  
  End If RjWwsC~B  
         "jL>P)  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  d.&_j`\F  

yY$^ R|t  
有热压工艺方面的人才或者资料分享下； I!/32* s1t  
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 ,3:f4e\<  

高手真多！

楼主威武霸气.