[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： MV<!<Qmj  
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关键点说几个： n5v'  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） T A\4uy6o  
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 [0&'cu>  
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 5iQmZ[  

以下是几个重要的函数： N0Efw$u  
1.判断点在区域中函数 4^DVW*OiI  
2.计算夹角函数 o"p^/'ri  
3.转置函数 ryxYcEM0  
4.得到区域中心点，及区域半径函数 p$Kj<:qiP  
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） 
MA\m[h]  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 xvU]jl6d  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 2fl4h<V  
   cax = x2 - x1 c$0_R;4/  
   cay = y2 - y1 ^P`NMSw  
   cbx = x2 - x3 R?cUy8?'S  
   cby = y2 - y3 kdp% !S%2  
   mo_jj = cax * cbx + cay * cby pDu{e>S|:  
   mo_ca = Sqr(cax * cax + cay * cay) L#D9@V'z  
   mo_cb = Sqr(cbx * cbx + cby * cby) d%0+i/p  
   cos_acb = mo_jj / (mo_ca * mo_cb) Dv&>*0B  
   'ff_cos = cos_acb w |_GV}#_  
   If cos_acb >= 1 Then x#VyQ[ok  
   nn = 0 b~7Jh:%@;  
   ElseIf cos_acb <= -1 Then kt^yj"C>  
   nn = 3.14159265258979 CRFCqmevR  
   Else lT]=&m>  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) pb#mg^8  
   End If mjb{~  
   'ff_angle = nn 9tn;L"#&N  
   ff_angle = nn * 180 / 3.14159265258979 W9Nmx3ve  
End Function

'判断点在区域内函数 *8bK')W  
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 lWWP03er!  
Dim aob, boc, cod, doa, sum As Single +\0T\;-Xe  
  If ppx = p1x And ppy = p1y Then B0d%c&N${  
     point_in = True m9$a"$c  
     Exit Function B^fT>1P  
  End If O:Va&Cyj*  
  If ppx = p2x And ppy = p2y Then 
q-nER<  
     point_in = True ;QBh;jg4  
     Exit Function 4KXc~eF[M"  
  End If @x1%)1  
   If ppx = p3x And ppy = p3y Then %r%So_^
  
     point_in = True y,E.SB  
     Exit Function _qn?2u3mnR  
  End If /b5>Qp  
     OfTfNhpK  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) NjX[;e-u  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ExVDkt0  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) gZO&r#   
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) _X4!xbP  
    sum = aob + boc + cod + doa mdW~~-@H  
    If 360.01 > sum And sum > 359.99 Then K R,z^9  
       point_in = True `'i( U7?  
    Else Xc*U+M>U  
       point_in = False 5.vG^T0w  
    End If %{!R l@  
End Function

'得到点半径,得到交点坐标函数 8|@9{  
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() x
wi\  
    '求得中心点坐标 ml6u1+v5  
Dim tt As String k7@t{Cu0D&  
Dim rt(3) As Single 8`=v.   
    '判断是否平行 /(hUfYm0  
   acx = p3x - p1x NI aFI(  
   acy = p3y - p1y 3Fs5RC~a  
   bdx = p4x - p2x /
mA,F;   
   bdy = p4y - p2y LzML%J62  
   If acx * bdy = acy * bdx Then ]
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      rt(0) = 0 #wY0D_3@1  
      Exit Function 7f3O  
   Else wSEWwU[  
      '判断斜率存在否 )5_jmW`n  
      If p1x = p3x And p2x <> p4x Then 15U(={  
         tt = "ac_n_bd_y" W3H+.E  
      ElseIf p1x <> p3x And p2x = p4x Then )G~w[~  
         tt = "ac_y_bd_n" ?QZ"JX])  
      ElseIf p1x <> p3x And p2x <> p4x Then ea'&xs#GK  
         tt = "ac_y_bd_y" x79Ha,  
      End If `R
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    Select Case tt U75Jp%bL  
         Case "ac_n_bd_y" -' g*^  
            'bd线段方程 *.#oxcll  
            k_bd = bdy / bdx ?t](a:IX  
            b_bd = p2y - k_bd * p2x UC HZ2&  
            p_x = p1x asHxL!  
            p_y = k_bd * p_x + b_bd t]aea*B  
         Case "ac_y_bd_n" TX=yPq  
            'ac线段方程 n/~A`%E@  
            k_ac = acy / acx ,<-G<${  
            b_ac = p1y - k_ac * p1x 3"N)xO-  
            p_x = p2x _ :Ag?2  
            p_y = k_ac * p_x + b_ac <-'$~G j  
        Case "ac_y_bd_y" U;N:j8  
           'ac，bd线段都要求 !|ak^GE:(%  
           k_ac = acy / acx SAY
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           b_ac = p1y - k_ac * p1x MN^Aw9U  
           k_bd = bdy / bdx J(DN!  
           b_bd = p2y - k_bd * p2x ",6M)3{|c  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) eI45PMP  
           p_y = k_ac * p_x + b_ac t>=fTkB  
        End Select VTy9_~q  
      rt(1) = p_x El\%E"Tk%  
      rt(2) = p_y JjaoOe  
     I$q]. B  
'计算最大半径 wX >*H  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) I9h ?;(  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 'R-3fO???  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Od f[*  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) (T`E!A0I\?  
Dim bb(5) As Single 2 3OC2|  
  bb(1) = rr1 HK`I\,K  
  bb(2) = rr2 wLK07e(  
  bb(3) = rr3 (aOv#Vor]%  
  bb(4) = rr4 !?c|XdjZ  
  nb = rr1 8J$|NYv_b  
For i = 1 To 4 1`ayc|9BR  
    If nb <= bb(i) Then {|I;YDA  
       nb = bb(i) _SW3_8SuM.  
    End If nt*Hc1I  
Next i ck?YI]q|  
    rt(0) = Sqr(nb) :#@= B]
 
    rr = rt() AbZKYF P  
  End If }gJ(DbnV  
         1U
P
C e  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  T7hcn
F$  

%`1q-,>v  
有热压工艺方面的人才或者资料分享下； nH[yJGZYSA  
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 Al}B34.uh  

高手真多！

楼主威武霸气.