[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： mLPQ5`_  
)
NRY9\H  
71 hv~Nk/x  

关键点说几个： eT[,k[#q  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） D(Zux8l  
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 I|m fr{  
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 5ap}(bO  

以下是几个重要的函数： Ec8Y}C,{7<  
1.判断点在区域中函数 rVzjLk
N^  
2.计算夹角函数 )_NQ*m  
3.转置函数 L:%ek3SOz  
4.得到区域中心点，及区域半径函数 "@Ra>qb  
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） DC]FY|ff  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 pTOS}A[dh  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single t&mw@bj  
   cax = x2 - x1 bICi'`  
   cay = y2 - y1 A~
\:}PN  
   cbx = x2 - x3 igOjlg_Q  
   cby = y2 - y3 p W:[Q\rSj  
   mo_jj = cax * cbx + cay * cby qdCa]n!d  
   mo_ca = Sqr(cax * cax + cay * cay) .oO_x>  
   mo_cb = Sqr(cbx * cbx + cby * cby) :)g=AhBF  
   cos_acb = mo_jj / (mo_ca * mo_cb) <uU AAHi  
   'ff_cos = cos_acb #PVgx9T=_  
   If cos_acb >= 1 Then -869$  
   nn = 0 09_3`K.*  
   ElseIf cos_acb <= -1 Then i:&Y{iPQp  
   nn = 3.14159265258979 j()_ VoB1  
   Else 9:!n'mn  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) r444s8Y  
   End If (toGU  
   'ff_angle = nn PD|I3qv~  
   ff_angle = nn * 180 / 3.14159265258979 JZD27[b
 
End Function

'判断点在区域内函数 #fG!dD42  
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 Zu$f-_"  
Dim aob, boc, cod, doa, sum As Single lc>nUhj.  
  If ppx = p1x And ppy = p1y Then .',ikez  
     point_in = True qX0IHe
  
     Exit Function \qUmdN{FU  
  End If s+yBxgQ/  
  If ppx = p2x And ppy = p2y Then =5oFutg`  
     point_in = True !!o69  
     Exit Function {tu* =
"d=  
  End If w]"Y1J(i  
   If ppx = p3x And ppy = p3y Then $$A{|4,aI  
     point_in = True z/F(z*'v  
     Exit Function (vz)GrH>  
  End If [@rZ.Hsl  
     *B)>5r  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) @-qxNw  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) >>(2ZJ  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) w/d9S(  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) GaSk&'n$Y  
    sum = aob + boc + cod + doa Z#
w1,n88  
    If 360.01 > sum And sum > 359.99 Then WQv~<]1JF  
       point_in = True cP$b>3O  
    Else 6b-d#H/1Y  
       point_in = False \&2GLBKpe  
    End If 5|r3i \  
End Function

'得到点半径,得到交点坐标函数 $SG^, !!&A  
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() Q7"KgqpQ3  
    '求得中心点坐标 Tx/  
Dim tt As String ]=WJ%p1l  
Dim rt(3) As Single 3hO`GM  
    '判断是否平行 ]pB0bJAt  
   acx = p3x - p1x .DHZs#R  
   acy = p3y - p1y 9s73mu`Twg  
   bdx = p4x - p2x X[j4V<4O  
   bdy = p4y - p2y e1~C>  
   If acx * bdy = acy * bdx Then Yah3I@xGy  
      rt(0) = 0 Y'Wj7P  
      Exit Function 1^!=J<`K;  
   Else E2X KhW  
      '判断斜率存在否 wh|[ "U('  
      If p1x = p3x And p2x <> p4x Then 73Mh65  
         tt = "ac_n_bd_y" %dw-}1X  
      ElseIf p1x <> p3x And p2x = p4x Then .N_0rPO,Kw  
         tt = "ac_y_bd_n" ^._)HM  
      ElseIf p1x <> p3x And p2x <> p4x Then B(Y{  
         tt = "ac_y_bd_y" ^=OjsN

 
      End If Fdm7k){A  
    Select Case tt ,EcmMI^A  
         Case "ac_n_bd_y" 7Ar4:iNvX  
            'bd线段方程 0z#+^  
            k_bd = bdy / bdx o[+1O  
            b_bd = p2y - k_bd * p2x =c-j4xna>  
            p_x = p1x ?.\CUVK  
            p_y = k_bd * p_x + b_bd MA(\r  
         Case "ac_y_bd_n" 1'c!9  
            'ac线段方程 [GhT.  
            k_ac = acy / acx &:akom8  
            b_ac = p1y - k_ac * p1x ``w,CP ?  
            p_x = p2x {* >$aI  
            p_y = k_ac * p_x + b_ac K+ufcct  
        Case "ac_y_bd_y" [g=yuVXNZZ  
           'ac，bd线段都要求 Va(R*38k  
           k_ac = acy / acx F
3H)B:  
           b_ac = p1y - k_ac * p1x VG2TiR1  
           k_bd = bdy / bdx YXrTm[P  
           b_bd = p2y - k_bd * p2x 5{,/m
"-  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) /Wg$.<!5}  
           p_y = k_ac * p_x + b_ac H&mw!=FV0  
        End Select Y_Ej-u+>{  
      rt(1) = p_x e{To&gy~  
      rt(2) = p_y ,_u8y&<|I  
     5y}}?6n+  
'计算最大半径 {-Yp~HQF  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) lsJ'dS  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 1@CI7j  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) !rTh+F*  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) /LuwPM  
Dim bb(5) As Single RBt"7'  
  bb(1) = rr1 ZzzQXfA#  
  bb(2) = rr2 `o/tpuI  
  bb(3) = rr3 [ {lF1+];@  
  bb(4) = rr4 qIA!m .GC  
  nb = rr1 $w+g%y)  
For i = 1 To 4 [FF%HRce,.  
    If nb <= bb(i) Then _)2NFq  
       nb = bb(i) RUX!(Xw  
    End If .s7o$u~l  
Next i ^L]+e  
    rt(0) = Sqr(nb) F~W*"i+EZ  
    rr = rt() <X|"5/h  
  End If RX?Nv4-  
         f+fF5Z\  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  bgYM  

tet  
有热压工艺方面的人才或者资料分享下； 6\~m{@  
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 >6jyd{  

高手真多！

楼主威武霸气.