[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： @H{$,\\  
%8 4<@f&n]  
MuO>O97  

关键点说几个： Y[x ^59  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） UT^t7MY#O  
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 YDQV,`S7  
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 *dKA/.g  

以下是几个重要的函数： Jk1Up2#B  
1.判断点在区域中函数 @u$oqjK  
2.计算夹角函数 2{#quXN9  
3.转置函数 ucA6s:!={  
4.得到区域中心点，及区域半径函数 e=F' O] 5  
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） hU4~`gp  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 9(@bjL465  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single hyTi':  
   cax = x2 - x1 YobIbpo  
   cay = y2 - y1 }$UuYO/i  
   cbx = x2 - x3 r":<1+07  
   cby = y2 - y3 Y@r#:BH)  
   mo_jj = cax * cbx + cay * cby TVjY8L9'h  
   mo_ca = Sqr(cax * cax + cay * cay) <"\K|2Sg  
   mo_cb = Sqr(cbx * cbx + cby * cby) rzO:9# d  
   cos_acb = mo_jj / (mo_ca * mo_cb) ->j9(76"  
   'ff_cos = cos_acb wZOO#&X#r  
   If cos_acb >= 1 Then h]D=v B  
   nn = 0 (Bmjz*%M  
   ElseIf cos_acb <= -1 Then  !c*^:0  
   nn = 3.14159265258979 H?aB8=)  
   Else 60p1.;'/a  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ! 4s$93  
   End If p(U'Ydl~  
   'ff_angle = nn =L
T({8  
   ff_angle = nn * 180 / 3.14159265258979 /`'50Cj  
End Function

'判断点在区域内函数 ^Krkf4fO  
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 k(7!W  
Dim aob, boc, cod, doa, sum As Single ^L'K?o  
  If ppx = p1x And ppy = p1y Then ioviJ7N% O  
     point_in = True $GPA6  
     Exit Function IBuuZ.=j2h  
  End If T2Vj&EA@  
  If ppx = p2x And ppy = p2y Then >^jm7}+hb  
     point_in = True xQD#; 7  
     Exit Function /vQ^>2X%
 
  End If S9L
3/P]  
   If ppx = p3x And ppy = p3y Then Dnp^yqz*  
     point_in = True
ck@[% ?  
     Exit Function WK=!<FsC$  
  End If '@W72ML.  
     :WxMv~e{U  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) '<Vvv^Er  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 9u)h$VC  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) *in_Zt3  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) hm5<_(F!  
    sum = aob + boc + cod + doa sVC5<?OW!p  
    If 360.01 > sum And sum > 359.99 Then @vv`86bm  
       point_in = True r*3;gyG.,#  
    Else P_?1Rwm-45  
       point_in = False iFHVr'Og'  
    End If h?R-t*G?  
End Function

'得到点半径,得到交点坐标函数 /!
E /9[V  
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() 6F<L4*4U  
    '求得中心点坐标 6[CX[=P30  
Dim tt As String 0\mM^+fO
 
Dim rt(3) As Single Wm\f:|U5`  
    '判断是否平行 d_yqmx?w  
   acx = p3x - p1x O+e8}Tmm  
   acy = p3y - p1y 0p#36czqy  
   bdx = p4x - p2x VJNPs6  
   bdy = p4y - p2y JhD8.@} b~  
   If acx * bdy = acy * bdx Then 8^~ljf]6  
      rt(0) = 0 l p? h~  
      Exit Function H`".L^  
   Else Jne)?Gt  
      '判断斜率存在否 ?&1?uc  
      If p1x = p3x And p2x <> p4x Then >!oN+8[~  
         tt = "ac_n_bd_y" Na`qAj}  
      ElseIf p1x <> p3x And p2x = p4x Then ~{N|("nB  
         tt = "ac_y_bd_n" "W1q}4_
 
      ElseIf p1x <> p3x And p2x <> p4x Then s$]I@;_  
         tt = "ac_y_bd_y" T@z$g  
      End If [oYe/<3  
    Select Case tt w S;(u[W  
         Case "ac_n_bd_y" qS7*.E~j|]  
            'bd线段方程 sX=!o})0  
            k_bd = bdy / bdx crmnh4-  
            b_bd = p2y - k_bd * p2x SC!IQ80H#D  
            p_x = p1x 7IvCMb&%R  
            p_y = k_bd * p_x + b_bd PffwNj/l  
         Case "ac_y_bd_n" GRs;-Jt  
            'ac线段方程 d }]b  
            k_ac = acy / acx -OziUM1qs  
            b_ac = p1y - k_ac * p1x u&g} !Smc8  
            p_x = p2x Ge @d"  
            p_y = k_ac * p_x + b_ac !"1bV [^  
        Case "ac_y_bd_y" m4%m0"Z  
           'ac，bd线段都要求 AUN Tc3  
           k_ac = acy / acx Jv7M[SJ#x  
           b_ac = p1y - k_ac * p1x Rc6Rk!^  
           k_bd = bdy / bdx =N3~2=g~A  
           b_bd = p2y - k_bd * p2x `&+L/  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) P]y5E9 k  
           p_y = k_ac * p_x + b_ac ,=
 PDL  
        End Select 'fgDe  
      rt(1) = p_x QKF2_Acc  
      rt(2) = p_y N*z<VZ  
     -Pvt+I>  
'计算最大半径 Q647a}  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) F4PD3E_#  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) %
tu{`PN<  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) nU`;MW/^w  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) vi=yR  
Dim bb(5) As Single 1k hwwoo  
  bb(1) = rr1 tC&y3!k2jR  
  bb(2) = rr2 X`vDhfh>N  
  bb(3) = rr3 {UhZ\
qe  
  bb(4) = rr4 T xN5K`q  
  nb = rr1 v<-D>iJ  
For i = 1 To 4 lmd0Q(I  
    If nb <= bb(i) Then Oq.) 8E.  
       nb = bb(i) zb3ir|  
    End If Isi,Tl ^  
Next i FKzqJwT  
    rt(0) = Sqr(nb) F )tNA?p)  
    rr = rt() Psv-y  
  End If ZuE0'9  
         dNyc|P`U  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  xo*a9H?@  

n.T [a  
有热压工艺方面的人才或者资料分享下； aR3W9  
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;X'.7[c  

高手真多！

楼主威武霸气.