[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：  qLP/z  
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关键点说几个： IA({RE  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） j7k}!j_O{  
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 (6Z^0GL  
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 x|(pmqIH+  

以下是几个重要的函数： mV$ebFco0  
1.判断点在区域中函数 ABX%oZ7[|o  
2.计算夹角函数 Bhd)# P  
3.转置函数 q`b6if"  
4.得到区域中心点，及区域半径函数 >m,hna]RZ  
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） AXW.`~ 4  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 )hXTgUZa  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single *;Mi/^pzK  
   cax = x2 - x1 =GPXuo  
   cay = y2 - y1 Og/aTR<;=  
   cbx = x2 - x3 'z(Y9%+a  
   cby = y2 - y3 &aLTy&8Fv  
   mo_jj = cax * cbx + cay * cby O -1O@:}c  
   mo_ca = Sqr(cax * cax + cay * cay) A iM ukd,  
   mo_cb = Sqr(cbx * cbx + cby * cby) e~N&?^M  
   cos_acb = mo_jj / (mo_ca * mo_cb) :ZV|8xI  
   'ff_cos = cos_acb "w'pIUQ3,  
   If cos_acb >= 1 Then o$sD9x
x  
   nn = 0 [-])$~WfW  
   ElseIf cos_acb <= -1 Then A'DFY {  
   nn = 3.14159265258979 %8Ff
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   Else i[!|0U`p  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) gEd A hfx  
   End If ?
,>3uD#  
   'ff_angle = nn zjQ746<&)i  
   ff_angle = nn * 180 / 3.14159265258979 @M5+12FYt  
End Function

'判断点在区域内函数 NPT-d  
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 h0tiWHw  
Dim aob, boc, cod, doa, sum As Single 
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  If ppx = p1x And ppy = p1y Then Vp/XVyL}R  
     point_in = True 6]brL.eGj  
     Exit Function :?6HG_9X  
  End If .xJ54Vz  
  If ppx = p2x And ppy = p2y Then SGWb*grt  
     point_in = True lYG`)#T  
     Exit Function ^wIB;!W  
  End If Nw*<e ]uD  
   If ppx = p3x And ppy = p3y Then 3W?7hh  
     point_in = True $hhXsu=  
     Exit Function F1#{(uW  
  End If \sNgs#{7E7  
     * ,aF-  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) t*IePz]/  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ):$KM{X  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) rl|'.~mc  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) >v+1v  
    sum = aob + boc + cod + doa U@Od
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    If 360.01 > sum And sum > 359.99 Then "iSY;y o  
       point_in = True Nny*C`uDF  
    Else tbS hSbj  
       point_in = False ${Un#]
g  
    End If @_ %RQO_X  
End Function

'得到点半径,得到交点坐标函数 OJ&'Z}LB  
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() +#Pb@^6"m  
    '求得中心点坐标 cY5&1Shb~  
Dim tt As String p1Ulo
G\  
Dim rt(3) As Single &>jz[3  
    '判断是否平行 )E9!m  
   acx = p3x - p1x Lz 1.+:Ag  
   acy = p3y - p1y +=($mcw#[  
   bdx = p4x - p2x oMbd1uus  
   bdy = p4y - p2y *:L"#20:R  
   If acx * bdy = acy * bdx Then BN9e S   
      rt(0) = 0 T?1BcY  
      Exit Function ~0PzRS^o  
   Else v'hc-Q9+>  
      '判断斜率存在否 K#OL/2^ 5  
      If p1x = p3x And p2x <> p4x Then KrGl}|  
         tt = "ac_n_bd_y" |m's)  
      ElseIf p1x <> p3x And p2x = p4x Then 5;)^o3X>  
         tt = "ac_y_bd_n" 'yiv.<4  
      ElseIf p1x <> p3x And p2x <> p4x Then @aS)=|Ls\  
         tt = "ac_y_bd_y" JBpV'_"]  
      End If edL2ax  
    Select Case tt w9|x{B  
         Case "ac_n_bd_y" Biv)s@"f-Q  
            'bd线段方程 [cB^6v  
            k_bd = bdy / bdx sQgz}0_=)  
            b_bd = p2y - k_bd * p2x _#{*I(l  
            p_x = p1x ?'k_K:_  
            p_y = k_bd * p_x + b_bd g *,O  
         Case "ac_y_bd_n" HT.,BF  
            'ac线段方程 Vlx.C~WYn  
            k_ac = acy / acx d|R-K7 ~~  
            b_ac = p1y - k_ac * p1x cSPQ NYU:  
            p_x = p2x T~3{$  
            p_y = k_ac * p_x + b_ac yr%[IX]R  
        Case "ac_y_bd_y" 
/b=C  
           'ac，bd线段都要求 UwUHB~<oE  
           k_ac = acy / acx F~Dof({:  
           b_ac = p1y - k_ac * p1x wNmpUO ?  
           k_bd = bdy / bdx ?s2-iuMPd  
           b_bd = p2y - k_bd * p2x ~v8X>XDL?T  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) `NtW+v  
           p_y = k_ac * p_x + b_ac c0o]O[  
        End Select GFFwk4n1  
      rt(1) = p_x }#s{."  
      rt(2) = p_y 6w<rSUd'  
     xb\EJ1M>  
'计算最大半径 [63\2{_^v  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) EV( F!&  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 336ETrG^0  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) =][ )|n  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) KJ+6Y9b1  
Dim bb(5) As Single T7nI/y  
  bb(1) = rr1 [!)
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  bb(2) = rr2 L-(bw3Yr>  
  bb(3) = rr3 X$@`4  
  bb(4) = rr4 yy3x]%KK  
  nb = rr1 3@":&  
For i = 1 To 4 O+W<l
:|$  
    If nb <= bb(i) Then P^OmJ;""D  
       nb = bb(i) Pm%xX~H  
    End If Fv]6an.  
Next i +6uf6&.@~  
    rt(0) = Sqr(nb) ]$ d ;P  
    rr = rt() 'xta/@Sq  
  End If 9\EW~OgTu  
         VzXVy)d  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  <lR:^M[v5<  

Tv1oy%dK  
有热压工艺方面的人才或者资料分享下； <.Zh{"$qo  
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 7 q!==P=  

高手真多！

楼主威武霸气.