[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： AvB21~t&]  
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关键点说几个： 9&s>RJ  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） o'? WWJK6w  
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 xF*i+'2  
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 #Vy:6O  

以下是几个重要的函数： I/u>
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1.判断点在区域中函数 .etG>tH  
2.计算夹角函数 n*9nzx#q  
3.转置函数 )!;20Po  
4.得到区域中心点，及区域半径函数 g*!1S  
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） \uZ1Sl  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Pfd%[C/vdm  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single :_Iz( 2hV  
   cax = x2 - x1 "G Jhx/zt  
   cay = y2 - y1 /l8wb~vl  
   cbx = x2 - x3 z>b^Ui0  
   cby = y2 - y3 ~*`wRiUhis  
   mo_jj = cax * cbx + cay * cby cfy9wD  
   mo_ca = Sqr(cax * cax + cay * cay) )JU`Z@?8  
   mo_cb = Sqr(cbx * cbx + cby * cby) 0^6}s1d_  
   cos_acb = mo_jj / (mo_ca * mo_cb) XW+-E^d  
   'ff_cos = cos_acb E!`/XB/nA  
   If cos_acb >= 1 Then "2 D{X  
   nn = 0 Z7 ++c<|p  
   ElseIf cos_acb <= -1 Then &SPIu,  
   nn = 3.14159265258979 21] K7  
   Else :Ye~I;"8  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) :u2tu60&MJ  
   End If qat'Vj,  
   'ff_angle = nn )&-n-m@E  
   ff_angle = nn * 180 / 3.14159265258979 |T-Ytuy8  
End Function

'判断点在区域内函数 F^!mgU X  
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 _HAr0R8BY  
Dim aob, boc, cod, doa, sum As Single clr]
gib  
  If ppx = p1x And ppy = p1y Then Xg}~\|n  
     point_in = True .o
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     Exit Function W#^p%?8pR  
  End If |~=4ZrcCP  
  If ppx = p2x And ppy = p2y Then /!y3ZzL  
     point_in = True l_(4CimOZ  
     Exit Function 6|1#Prj  
  End If |G)bnmi7  
   If ppx = p3x And ppy = p3y Then X<H+Z2d  
     point_in = True eh3CVgH91;  
     Exit Function @Tsdgx8  
  End If IZ]L.0,  
     jF5oc  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ]8opI\  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) E8We2T[^M  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ,E4qxZC(X  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) q -^Z=,<  
    sum = aob + boc + cod + doa l
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    If 360.01 > sum And sum > 359.99 Then JI92Dc*o  
       point_in = True iHyA;'!Os  
    Else YFW0  
       point_in = False VHU,G+ms  
    End If bJ6v5YA%  
End Function

'得到点半径,得到交点坐标函数 c::Vh  
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() C8 2lT_7"  
    '求得中心点坐标 wmgKh)`@_{  
Dim tt As String <}Rr C#uiA  
Dim rt(3) As Single cX@72  
    '判断是否平行 ZD]5"oHY  
   acx = p3x - p1x -o0~xspF  
   acy = p3y - p1y KRP)y{~o  
   bdx = p4x - p2x uY=}w"Db  
   bdy = p4y - p2y 9Vv&\m!0  
   If acx * bdy = acy * bdx Then p\7(IhW@  
      rt(0) = 0 9#niMv9  
      Exit Function Y<-dd"\  
   Else ||k^pzj%  
      '判断斜率存在否 'B4j=K*  
      If p1x = p3x And p2x <> p4x Then [z`m`9Aq  
         tt = "ac_n_bd_y" m.N/g,  
      ElseIf p1x <> p3x And p2x = p4x Then zi}dQsy6
 
         tt = "ac_y_bd_n" [.`#N1-@M  
      ElseIf p1x <> p3x And p2x <> p4x Then NFcMh+qnK  
         tt = "ac_y_bd_y" Flzl,3rW4  
      End If ^ $t7p 1  
    Select Case tt  $mG&4Y  
         Case "ac_n_bd_y" d.uJ}=|  
            'bd线段方程 c~+l|r=u?  
            k_bd = bdy / bdx $ OMGo`z  
            b_bd = p2y - k_bd * p2x gb_k^wg~1'  
            p_x = p1x N!F
;!  
            p_y = k_bd * p_x + b_bd X+T +y>ea  
         Case "ac_y_bd_n" 3EKqXXzOB  
            'ac线段方程 G>0S(M)  
            k_ac = acy / acx `7zNVYur8  
            b_ac = p1y - k_ac * p1x \[w82%U  
            p_x = p2x y2eeE CS]  
            p_y = k_ac * p_x + b_ac -?WhJ.U  
        Case "ac_y_bd_y" #b4Pn`[  
           'ac，bd线段都要求 nAJ<@a  
           k_ac = acy / acx JY tM1d  
           b_ac = p1y - k_ac * p1x YS5Pt)?  
           k_bd = bdy / bdx e'uI~%$NJL  
           b_bd = p2y - k_bd * p2x /a$RJ6t&3  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) )0JXUC e  
           p_y = k_ac * p_x + b_ac 'WG%O7s.  
        End Select :jq   
      rt(1) = p_x 9RoN,e8!  
      rt(2) = p_y g2WDa'{L  
     D-BWgK  
'计算最大半径 w|>O!]K]  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ?qt>;o|Ue  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) jnuovM!x~  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 6 2r%q^r`i  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) sCFqz[I  
Dim bb(5) As Single \$Nx`daFi  
  bb(1) = rr1 tF<|Eja*  
  bb(2) = rr2 .)>DFGb>H  
  bb(3) = rr3 l1\/ `  
  bb(4) = rr4 dkC[
Jt  
  nb = rr1 ~',<7eW  
For i = 1 To 4 bb6J$NR  
    If nb <= bb(i) Then YoKY&i6r}  
       nb = bb(i) GyO
o$FW  
    End If =M'y& iz-  
Next i lk6*?EJ  
    rt(0) = Sqr(nb) HUtuUX  
    rr = rt() }F1|& A  
  End If ]3C&l+m$ot  
         ~/6m|k  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  L@w|2  

0ANqEQX  
有热压工艺方面的人才或者资料分享下； 8zGe5Dn9  
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  "
/6(  

高手真多！

楼主威武霸气.