[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： uBq3.+,x*  
c_bVF 'Bz  
^+Vk#_2Q  

关键点说几个： 99Yo1Q0  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） )ozcr^  
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 zYG,x*IH  
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 IbJ[Og^Qyu  

以下是几个重要的函数： %+xwk=%*  
1.判断点在区域中函数 crNjI`%tw  
2.计算夹角函数 u.
kY
p  
3.转置函数 q^N0abzgP  
4.得到区域中心点，及区域半径函数 -N7xO)  
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） |#&V:GZp  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 kPO6gdwq$  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single !eR-Kor  
   cax = x2 - x1 afY_9g!\  
   cay = y2 - y1 "brRME3  
   cbx = x2 - x3 /esVuz  
   cby = y2 - y3 7<3U?]0  
   mo_jj = cax * cbx + cay * cby 2Io6s'  
   mo_ca = Sqr(cax * cax + cay * cay) 7 DY WdDX  
   mo_cb = Sqr(cbx * cbx + cby * cby) 9fNu?dE   
   cos_acb = mo_jj / (mo_ca * mo_cb) 9k\)tWe  
   'ff_cos = cos_acb ';b3Mm #  
   If cos_acb >= 1 Then PEW4J{(W  
   nn = 0 Vd%v_Ek  
   ElseIf cos_acb <= -1 Then Har~MO?A  
   nn = 3.14159265258979 z
j>aaY  
   Else ;}/U+`=D?  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) VT% KN`l  
   End If _%'L@[ H  
   'ff_angle = nn sTtX$&Qu  
   ff_angle = nn * 180 / 3.14159265258979 W|25t)cJ8h  
End Function

'判断点在区域内函数 ZfPd0 p  
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 +T0op4  
Dim aob, boc, cod, doa, sum As Single weAn&h|  
  If ppx = p1x And ppy = p1y Then <S1??  
     point_in = True /!GKh5|  
     Exit Function
7]Al*)  
  End If l{Jt sI  
  If ppx = p2x And ppy = p2y Then _eJXi,  
     point_in = True J I<3\=:+  
     Exit Function ,~4H{{<j  
  End If :qK
F58W  
   If ppx = p3x And ppy = p3y Then \q~w<%9Dq  
     point_in = True l~bKBz  
     Exit Function  i"vawxm  
  End If QsiJ%O Q  
     ugYw<  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) X8/Tl\c  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) wV\%R,bZj  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) w*50ZS;N  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 55.;+B5L*  
    sum = aob + boc + cod + doa VFv9Q2/.  
    If 360.01 > sum And sum > 359.99 Then ZJ;LD*  
       point_in = True <i{K7}':  
    Else xS'zZ%?  
       point_in = False \6sqyWI %  
    End If wGvhB%8K  
End Function

'得到点半径,得到交点坐标函数 @mf({Q>  
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*mdji  
    '求得中心点坐标 f/}  
Dim tt As String wW:7y>z)  
Dim rt(3) As Single $I@GUtzjp  
    '判断是否平行 YNSyi@  
   acx = p3x - p1x *8bK')W  
   acy = p3y - p1y z8HsYf(!  
   bdx = p4x - p2x V<8K@/n@  
   bdy = p4y - p2y Vtb1[cnna  
   If acx * bdy = acy * bdx Then y4@gGC=  
      rt(0) = 0 8eluO ?p  
      Exit Function =m7H)z)i*J  
   Else B5ea(j  
      '判断斜率存在否 DAdYg0efex  
      If p1x = p3x And p2x <> p4x Then -DP*q3  
         tt = "ac_n_bd_y" +4et7  
      ElseIf p1x <> p3x And p2x = p4x Then !:WW  
         tt = "ac_y_bd_n" !Xj#@e  
      ElseIf p1x <> p3x And p2x <> p4x Then Qzqc .T  
         tt = "ac_y_bd_y" 5t\HJ`C1Z  
      End If ~6`iY@)  
    Select Case tt $ rUSKm#  
         Case "ac_n_bd_y" a?F!,=F  
            'bd线段方程 E{4 e<%Y,  
            k_bd = bdy / bdx VO=!8Yx[  
            b_bd = p2y - k_bd * p2x b9~A-Z  
            p_x = p1x [:h5}  
            p_y = k_bd * p_x + b_bd O0T/#<Cn!  
         Case "ac_y_bd_n" h7]EB!D\A  
            'ac线段方程 ,zhJY ?sk  
            k_ac = acy / acx 5\bJR0I@  
            b_ac = p1y - k_ac * p1x bFY~oa%C  
            p_x = p2x p[9s<lEh  
            p_y = k_ac * p_x + b_ac eQUe >*  
        Case "ac_y_bd_y" l30Y8t~d  
           'ac，bd线段都要求 m^V5*JIh  
           k_ac = acy / acx H4:&%"j7  
           b_ac = p1y - k_ac * p1x ?A?F.n`  
           k_bd = bdy / bdx #Exp51  
           b_bd = p2y - k_bd * p2x 7I9aG.;  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) uo2'"@[e  
           p_y = k_ac * p_x + b_ac jq-l5})h  
        End Select e(?]SU|  
      rt(1) = p_x NBYH;h P  
      rt(2) = p_y *$,:m  
     iafE5b)
 
'计算最大半径 d$t40+v  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ~g6 3qs  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) -]srp;=i  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) DF_X  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) q_V0+
qH  
Dim bb(5) As Single LzML%J62  
  bb(1) = rr1 oDn|2Sdqd  
  bb(2) = rr2 /Fgw$ ^H  
  bb(3) = rr3 );FS7R  
  bb(4) = rr4 o`n$b(VZ  
  nb = rr1 )5_jmW`n  
For i = 1 To 4 15U(={  
    If nb <= bb(i) Then -0Cnp/Yj@  
       nb = bb(i) )G~w[~  
    End If ?QZ"JX])  
Next i ea'&xs#GK  
    rt(0) = Sqr(nb) i/H+xrCK  
    rr = rt() l{Dct\ #s  
  End If @-HG`c ct  
         A\fb<  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ULMu19>  

6DH~dL_",%  
有热压工艺方面的人才或者资料分享下； y
KO`rtP  
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 sI{ M  

高手真多！

楼主威武霸气.