[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： zO07X*Bw  
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图片:2.jpg

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关键点说几个： OgTE^W@  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 2e
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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 Q(2X$7iRq  
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 Bjz\L0d  

以下是几个重要的函数： "kKIVlC  
1.判断点在区域中函数 J(\"\
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2.计算夹角函数 =Po!\[SBU  
3.转置函数 ]8q5k5
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4.得到区域中心点，及区域半径函数 cf|<~7  
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） kQ$Q}3f  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 <,l&),  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single q0 :Lb  
   cax = x2 - x1 /c`)Er6d  
   cay = y2 - y1 8 F'i5i  
   cbx = x2 - x3 1{%EQhNd  
   cby = y2 - y3 yg "u^*r&  
   mo_jj = cax * cbx + cay * cby Xu$xO(  
   mo_ca = Sqr(cax * cax + cay * cay) ";j/k9DE  
   mo_cb = Sqr(cbx * cbx + cby * cby) 2C%{A  
   cos_acb = mo_jj / (mo_ca * mo_cb) mj<(qZh  
   'ff_cos = cos_acb QzIK580%t  
   If cos_acb >= 1 Then A==P?,RG  
   nn = 0 +V&b<y;?>  
   ElseIf cos_acb <= -1 Then v'.?:S&m  
   nn = 3.14159265258979 JW&/l  
   Else pN&Dpz^  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) @3[Z QF  
   End If KMznl=LF  
   'ff_angle = nn e(BF=gesgp  
   ff_angle = nn * 180 / 3.14159265258979 E/(:\Cm^  
End Function

'判断点在区域内函数 ]BCH9%zLj  
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 ,a< !d  
Dim aob, boc, cod, doa, sum As Single B4GgR,P@S  
  If ppx = p1x And ppy = p1y Then zp"sM z]  
     point_in = True FgQd7p  
     Exit Function (ui"vLk8PP  
  End If sxl29y^*  
  If ppx = p2x And ppy = p2y Then " 9 h]P^  
     point_in = True M'HmVg4'  
     Exit Function h5x FP  
  End If 2M= gpy  
   If ppx = p3x And ppy = p3y Then j,Qp*b#Qo  
     point_in = True lW?}jzuo  
     Exit Function sBq @W4  
  End If +K;(H']Z<-  
     ^{-J Y  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) [Pby d  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) (<(8(}x  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) &BCl>^wn}  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) .'p_j(uv  
    sum = aob + boc + cod + doa =wPl;SDf!  
    If 360.01 > sum And sum > 359.99 Then D^I%tn=F  
       point_in = True G*mk 19Z  
    Else ?A2#V(4  
       point_in = False WWc{]R^D  
    End If a*NcL(OC  
End Function

'得到点半径,得到交点坐标函数 O]~cv^  
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() GG
5wiN*2S  
    '求得中心点坐标 6^s=25>p  
Dim tt As String bf-.SX~  
Dim rt(3) As Single O2q`2L~  
    '判断是否平行 `Ou\:Iz0u  
   acx = p3x - p1x k!>MZ  
   acy = p3y - p1y 't{~#0d=  
   bdx = p4x - p2x TPt<(-}W  
   bdy = p4y - p2y #
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   If acx * bdy = acy * bdx Then vp1IYW  
      rt(0) = 0 `!kOyh:X  
      Exit Function w [D9Q=  
   Else |#LU"D  
      '判断斜率存在否 c-z ,}`  
      If p1x = p3x And p2x <> p4x Then p}.L]Y  
         tt = "ac_n_bd_y" vXAO#'4tm%  
      ElseIf p1x <> p3x And p2x = p4x Then 8Sd<!  
         tt = "ac_y_bd_n" Nj5Mc>_   
      ElseIf p1x <> p3x And p2x <> p4x Then (q59cAw~X  
         tt = "ac_y_bd_y" \ty{KAc&  
      End If UIi;&[  
    Select Case tt C,P>7  
         Case "ac_n_bd_y" O[U^{~iM  
            'bd线段方程 Ya<
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            k_bd = bdy / bdx R7r` (c!  
            b_bd = p2y - k_bd * p2x a"EX<6"  
            p_x = p1x 7;jwKA;k  
            p_y = k_bd * p_x + b_bd "9jt2@<  
         Case "ac_y_bd_n" <kN4@bd;  
            'ac线段方程 -hiG8%l5  
            k_ac = acy / acx 3vfm$sx@  
            b_ac = p1y - k_ac * p1x __fa,kK{?  
            p_x = p2x "-88bF~  
            p_y = k_ac * p_x + b_ac 0/S|h"-L  
        Case "ac_y_bd_y" 5 >S#ew  
           'ac，bd线段都要求 SMY,bU'a  
           k_ac = acy / acx Aw~ =U!  
           b_ac = p1y - k_ac * p1x o|
YY,G=C  
           k_bd = bdy / bdx ig5 d-A  
           b_bd = p2y - k_bd * p2x c>#T\AEkF  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) h
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           p_y = k_ac * p_x + b_ac wmAZ {  
        End Select umhg O.!  
      rt(1) = p_x }:<`L\8q\  
      rt(2) = p_y {4J:t_<nKO  
     M{cF14cQ  
'计算最大半径 >?aPXC  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 8yij=T*  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) b;G3
&R]  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 0tyoH3o/d  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 2fFZ70
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Dim bb(5) As Single ]rGZ  
  bb(1) = rr1 :,Z'/e0&  
  bb(2) = rr2 6<X.]"u+E~  
  bb(3) = rr3 y (@j;Q3(r  
  bb(4) = rr4 ^YG'p?r.s  
  nb = rr1 r@b M3V_o  
For i = 1 To 4 tIn dve  
    If nb <= bb(i) Then NbgK#;  
       nb = bb(i) O{b<UP'85  
    End If N3dS%F,_  
Next i < %@e<,8  
    rt(0) = Sqr(nb) Wi7!J[ B  
    rr = rt() $cjwY$6  
  End If ;w>Dqem  
         WzG]9$v &  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  62.)fC
Q^  

ntr&? H  
有热压工艺方面的人才或者资料分享下； } *:H\GL  
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 E$"`|Df  

高手真多！

楼主威武霸气.