[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： SJ<v<
B  
~D>pu%F  
} ck<R
  

关键点说几个： $\Y&2&
1s  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 9i}$245lB  
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 DrkTM<  
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 BhzDV
 

以下是几个重要的函数： =I546($  
1.判断点在区域中函数 (+epRC  
2.计算夹角函数 robg1  
3.转置函数 lQHF=Jex  
4.得到区域中心点，及区域半径函数 &]#L'D!"  
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） LK~aLa5wG  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 vKG\8+  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single b4
e~Z  
   cax = x2 - x1 fx5S2%f^  
   cay = y2 - y1 BsIF3sS#9  
   cbx = x2 - x3 j#n ]q{s4  
   cby = y2 - y3 |(3y09  
   mo_jj = cax * cbx + cay * cby u^tQ2&?O!P  
   mo_ca = Sqr(cax * cax + cay * cay) /{i~-DVME
 
   mo_cb = Sqr(cbx * cbx + cby * cby) Nrr}) g  
   cos_acb = mo_jj / (mo_ca * mo_cb) /'rj L<M  
   'ff_cos = cos_acb Z^&G9I#  
   If cos_acb >= 1 Then Qh1pX}X  
   nn = 0 W^tD6H;  
   ElseIf cos_acb <= -1 Then *#mmk1`  
   nn = 3.14159265258979 AygdAg'\  
   Else 9:USxFM  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) DQQ]grU  
   End If q!z"YpYB  
   'ff_angle = nn 8(%F{&<;  
   ff_angle = nn * 180 / 3.14159265258979 S{+t>en  
End Function

'判断点在区域内函数 cAW}a  
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 'v6@5t19j  
Dim aob, boc, cod, doa, sum As Single dw"Es;^  
  If ppx = p1x And ppy = p1y Then XjGS.&'I  
     point_in = True V!He2<  
     Exit Function kXwAw]ogN  
  End If U
#[&(  
  If ppx = p2x And ppy = p2y Then hJEd7{n  
     point_in = True P51M?3&=l  
     Exit Function <a6pjx>y  
  End If g-sNYd%?a  
   If ppx = p3x And ppy = p3y Then t`Z'TqP R  
     point_in = True H0afu)$,  
     Exit Function ="voJgvw  
  End If J?8Mo=UZz  
     u9hd%}9Qd?  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) {v|!];i  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) o9eOp3w30  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) VHD+NY/  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) QRQZ{m  
    sum = aob + boc + cod + doa 7}X1A!1  
    If 360.01 > sum And sum > 359.99 Then <L-F3Buu  
       point_in = True !?P8[K  
    Else 'C'mgEl%L  
       point_in = False {<,%_pJR  
    End If xb,d,(^]R  
End Function

'得到点半径,得到交点坐标函数 S^rf^%  
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() 8o~ NJ 6  
    '求得中心点坐标 `B)@  
Dim tt As String /$c8
7\  
Dim rt(3) As Single YYe G9yR  
    '判断是否平行 m/=nz.  
   acx = p3x - p1x oYqHl1cs  
   acy = p3y - p1y 7f>=-sv  
   bdx = p4x - p2x z?o8h N\  
   bdy = p4y - p2y m+(Cl#+  
   If acx * bdy = acy * bdx Then =D`8,n [  
      rt(0) = 0 = lo.LFV  
      Exit Function q1}!Okr"2  
   Else Q~,Mzt"}W  
      '判断斜率存在否 up5f]:!  
      If p1x = p3x And p2x <> p4x Then p!UR;xHI\  
         tt = "ac_n_bd_y" (4YLUN&1O$  
      ElseIf p1x <> p3x And p2x = p4x Then b$_81i  
         tt = "ac_y_bd_n" WNyW1?"  
      ElseIf p1x <> p3x And p2x <> p4x Then \,#$,dUXD  
         tt = "ac_y_bd_y" c{M ,K  
      End If j,0`k  
    Select Case tt `
c  
         Case "ac_n_bd_y"  &K/?#  
            'bd线段方程 FLi'}C  
            k_bd = bdy / bdx )WqolB  
            b_bd = p2y - k_bd * p2x q'mh*  
            p_x = p1x #V>R#Oh}  
            p_y = k_bd * p_x + b_bd `2.c=,S{  
         Case "ac_y_bd_n" *tXyd<_
Hd  
            'ac线段方程 FZi@h  
            k_ac = acy / acx f$lb
.fy5  
            b_ac = p1y - k_ac * p1x hYJzF.DW<$  
            p_x = p2x -#Zdf|  
            p_y = k_ac * p_x + b_ac )3h\QE!z  
        Case "ac_y_bd_y" (D>_O$o  
           'ac，bd线段都要求 2k.VTGak  
           k_ac = acy / acx @Xo*TJB  
           b_ac = p1y - k_ac * p1x Rc1j^S;>  
           k_bd = bdy / bdx 
$+4DpqJ  
           b_bd = p2y - k_bd * p2x 'z$N{p4
0m  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) FGV L[\  
           p_y = k_ac * p_x + b_ac SQN?[v  
        End Select "Rj PTRe:  
      rt(1) = p_x ~q`!928Gu  
      rt(2) = p_y D3o,2E(o  
     Os9SfL  
'计算最大半径 )?rq8VO  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) h^3gYL7O6  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 5u$.!l8Nl  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) R"t#dG]1t  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) h@%Xy(/m'  
Dim bb(5) As Single <C`bf$ak  
  bb(1) = rr1 )iN;1>  
  bb(2) = rr2 3aqH!?rVU  
  bb(3) = rr3 J^7m?mA  
  bb(4) = rr4 ~]KdsT(=_  
  nb = rr1 4"P9z}y=i  
For i = 1 To 4 rq%]CsRY5  
    If nb <= bb(i) Then !Tnjha*  
       nb = bb(i) wps/{h,  
    End If }_+XN"}C  
Next i 5 ^{~xOM5  
    rt(0) = Sqr(nb) =$'>VPQ  
    rr = rt() @O#!W]6NT6  
  End If B!RfPk1B<*  
         e;.,x
5+  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Luao?;|U  

"kApGNB  
有热压工艺方面的人才或者资料分享下； {C w.?JU  
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 S257+ K9  

高手真多！

楼主威武霸气.