[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： 2K]IlsMO&  
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图片:2.jpg

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关键点说几个： q Vm"f,ruo  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 7q%|4Z-~  
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 P>*Fj4Z~  
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 rH$eB/#F  

以下是几个重要的函数： +I|Rk&  
1.判断点在区域中函数 U^%9 )4bj  
2.计算夹角函数 z,pNb%*O  
3.转置函数 R'6@n#:  
4.得到区域中心点，及区域半径函数 -xJX_6}A  
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） N'I(P9@  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 jm+ V$YBP  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ]>5T}h  
   cax = x2 - x1 'KH lrmnr  
   cay = y2 - y1 xEjx]w/&  
   cbx = x2 - x3 }N?g|  
   cby = y2 - y3 pvlDjj}  
   mo_jj = cax * cbx + cay * cby /K7Bae5h  
   mo_ca = Sqr(cax * cax + cay * cay) C(G(^_6  
   mo_cb = Sqr(cbx * cbx + cby * cby) 0HqPyM13Q  
   cos_acb = mo_jj / (mo_ca * mo_cb) FJ{=2]x|  
   'ff_cos = cos_acb 
2Kjrw;  
   If cos_acb >= 1 Then aX|g S\zx  
   nn = 0 C1b*v&1{
 
   ElseIf cos_acb <= -1 Then vX ?aB!nkw  
   nn = 3.14159265258979 elu=9d];@  
   Else  Nj+a2[  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) W3)\co  
   End If `%e|$pK  
   'ff_angle = nn Uo~T'
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   ff_angle = nn * 180 / 3.14159265258979 +jUgx;u,  
End Function

'判断点在区域内函数 OZf6/10O/  
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 e!GZSk   
Dim aob, boc, cod, doa, sum As Single S<"oUdkz
 
  If ppx = p1x And ppy = p1y Then oe9lF*$/  
     point_in = True hUh+JW  
     Exit Function eIH$"f;L  
  End If ZWS2q4/S  
  If ppx = p2x And ppy = p2y Then }AlYNEY  
     point_in = True \8e2?(@"k  
     Exit Function )n>+m|IqY(  
  End If 7tRi"\[5  
   If ppx = p3x And ppy = p3y Then +"dv
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     point_in = True Jd_;@(Eg=  
     Exit Function /N6}*0Ru  
  End If O#)jr-vXdV  
     A (okv  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Hkege5{  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) iPvuz7j=h  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) H]&gW/=  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 6Z?Su(s(5  
    sum = aob + boc + cod + doa {WQq}-(  
    If 360.01 > sum And sum > 359.99 Then $5N
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       point_in = True g
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    Else
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       point_in = False ~W-cGb3c  
    End If H}/05e  
End Function

'得到点半径,得到交点坐标函数 -DjJ",h( $  
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() cj$d=k~  
    '求得中心点坐标 /<{:I \<  
Dim tt As String TB!(('  
Dim rt(3) As Single r@kP*  
    '判断是否平行 > 'i  
   acx = p3x - p1x ) #+^ sAO  
   acy = p3y - p1y esX)"_xf  
   bdx = p4x - p2x ?6"{!s{v  
   bdy = p4y - p2y ~b)74M/  
   If acx * bdy = acy * bdx Then [9o4hw  
      rt(0) = 0 !5Sd2<N  
      Exit Function G8J*Wnwu[K  
   Else ^5;`-Ky  
      '判断斜率存在否 gE])!GMM3  
      If p1x = p3x And p2x <> p4x Then @7<uMasfp  
         tt = "ac_n_bd_y" oM1Qh?  
      ElseIf p1x <> p3x And p2x = p4x Then NxA)@9Q  
         tt = "ac_y_bd_n" Iz@)!3h  
      ElseIf p1x <> p3x And p2x <> p4x Then )Xtnk  
         tt = "ac_y_bd_y" A/}W&bnluD  
      End If j Ux z  
    Select Case tt B*
3Y!!  
         Case "ac_n_bd_y" [yS#O\$'e  
            'bd线段方程 [eUf
tr9&0  
            k_bd = bdy / bdx qfoD  
            b_bd = p2y - k_bd * p2x t#i,1aHA  
            p_x = p1x j)C:$  
            p_y = k_bd * p_x + b_bd .(CP. d  
         Case "ac_y_bd_n" = ieag7!  
            'ac线段方程 D5,P)[  
            k_ac = acy / acx ])}(k
 
            b_ac = p1y - k_ac * p1x
c>
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            p_x = p2x p-SJ6Gg 9  
            p_y = k_ac * p_x + b_ac 9DQ
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        Case "ac_y_bd_y" ACq7dLys,B  
           'ac，bd线段都要求 36.N>G,  
           k_ac = acy / acx :'iYxhM.V  
           b_ac = p1y - k_ac * p1x 'T<iHV&  
           k_bd = bdy / bdx G 2!xPHz  
           b_bd = p2y - k_bd * p2x QPtGdd  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) sarq`%zrk  
           p_y = k_ac * p_x + b_ac `;l.MZL!  
        End Select uocHa5J  
      rt(1) = p_x wV\gj~U;P  
      rt(2) = p_y f"1>bW>R+  
     \*f;Xaa  
'计算最大半径 mZz=
"ZLa:  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Y5ZZ3Ati  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) <Z}SKR"U%  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) uvP2Wgt  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) jh2t9SI~  
Dim bb(5) As Single 9}a_:hAy/  
  bb(1) = rr1 G6@M&u5RT  
  bb(2) = rr2 l>*"mh  
  bb(3) = rr3 OyV<u@[i  
  bb(4) = rr4 0sca4G0{  
  nb = rr1 :0& X^]\  
For i = 1 To 4 OCZaQ33  
    If nb <= bb(i) Then YQJ==C1  
       nb = bb(i) h\v'9  
    End If %1}K""/  
Next i Tou/5?#%e  
    rt(0) = Sqr(nb) ;{h CF  
    rr = rt() r}[7x]sP  
  End If !$
N<ds.  
         < -W*$?^  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ;n 7/O5M|  

/HaHH.e  
有热压工艺方面的人才或者资料分享下； MjU6/pO}L  
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 1u:< 25  

高手真多！

楼主威武霸气.