[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： Ac{TqiIv  
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关键点说几个： 3TeRZ=2:*x  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 4_CL1g  
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 v9,cL.0&  
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 w(Tr,BFF  

以下是几个重要的函数： z19%!k  
1.判断点在区域中函数 F4"bMN  
2.计算夹角函数 qf ]le]J  
3.转置函数 @p/"]zf  
4.得到区域中心点，及区域半径函数 9An\uH)mL  
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） Uc,

..  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ?dv-`)S&  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 2?:OsA}  
   cax = x2 - x1 :yi} CM4  
   cay = y2 - y1 _\,lv \u  
   cbx = x2 - x3 Jy"\_Vvl  
   cby = y2 - y3 sKs`gi2  
   mo_jj = cax * cbx + cay * cby YwZx{%
f  
   mo_ca = Sqr(cax * cax + cay * cay) =TzJgx  
   mo_cb = Sqr(cbx * cbx + cby * cby) 5! +{JTXa  
   cos_acb = mo_jj / (mo_ca * mo_cb) $\1M"a}F  
   'ff_cos = cos_acb -bSM]86  
   If cos_acb >= 1 Then r58<A'#  
   nn = 0 car|&b
 
   ElseIf cos_acb <= -1 Then 'L9hM.+  
   nn = 3.14159265258979 UH+#Nel+!  
   Else eLgq )  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) (~5]1S}F  
   End If 0
Y0`$   
   'ff_angle = nn X&rsWk  
   ff_angle = nn * 180 / 3.14159265258979 ?|}qT05  
End Function

'判断点在区域内函数 +;pw^QB  
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 OUO'w6m!  
Dim aob, boc, cod, doa, sum As Single saQo]6#  
  If ppx = p1x And ppy = p1y Then <HS{A$]  
     point_in = True Vu4LC&q  
     Exit Function =,qY\@fq  
  End If EKN<KnU%  
  If ppx = p2x And ppy = p2y Then ZJhI|wRwD  
     point_in = True 'gD./|Z0  
     Exit Function ,VUOsNN4\  
  End If n
i )G  
   If ppx = p3x And ppy = p3y Then >f-RzQ k  
     point_in = True /n$R-Q  
     Exit Function 0@EI@X;q  
  End If 2\|sXC  
     d$E>bo-\   
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) T?jN/}qg  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) /M3;~sx  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) -!M>;M@  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) r9b(d]  
    sum = aob + boc + cod + doa 9U3}_  
    If 360.01 > sum And sum > 359.99 Then Uqj$itqUQ  
       point_in = True K*1]P ar;  
    Else 87)/dHc  
       point_in = False yOXEP  
    End If j b'M  
End Function

'得到点半径,得到交点坐标函数 .>_%12>  
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() Wap\J7NY  
    '求得中心点坐标 XMxm2-%olP  
Dim tt As String T0b/txS  
Dim rt(3) As Single P9S)7&+DL  
    '判断是否平行 GlJOb|WOX  
   acx = p3x - p1x Su +<mW  
   acy = p3y - p1y mT|r:Yr:  
   bdx = p4x - p2x y0) mBCX  
   bdy = p4y - p2y +J A\by  
   If acx * bdy = acy * bdx Then UxMei  
      rt(0) = 0 eE\T,u5:  
      Exit Function h+YPyeAs  
   Else @cx#'  
      '判断斜率存在否 Y$|KY/)H)  
      If p1x = p3x And p2x <> p4x Then 3(*vZ  
         tt = "ac_n_bd_y" m|]"e@SF2  
      ElseIf p1x <> p3x And p2x = p4x Then dV*9bDkM/  
         tt = "ac_y_bd_n" h*Mi/\  
      ElseIf p1x <> p3x And p2x <> p4x Then NNJQDkO-I  
         tt = "ac_y_bd_y" ICG:4n(,  
      End If ]'>jw#|h  
    Select Case tt mr]~(]B?r  
         Case "ac_n_bd_y" c@j3L23B  
            'bd线段方程 LJ z6)kz  
            k_bd = bdy / bdx !# xi^I  
            b_bd = p2y - k_bd * p2x  91fZr  
            p_x = p1x R.GDCGAL  
            p_y = k_bd * p_x + b_bd E=,fdyj.  
         Case "ac_y_bd_n" *N6sxFs  
            'ac线段方程 *W 04$N  
            k_ac = acy / acx mWLiXKnb  
            b_ac = p1y - k_ac * p1x g]?>6 %#rA  
            p_x = p2x k@>(sXs  
            p_y = k_ac * p_x + b_ac l Yj$3  
        Case "ac_y_bd_y" XN3'k[  
           'ac，bd线段都要求 XF@34b5(  
           k_ac = acy / acx 0juP"v$C>  
           b_ac = p1y - k_ac * p1x |a'$v4dCF  
           k_bd = bdy / bdx Fd%JF#
Hk  
           b_bd = p2y - k_bd * p2x ~eiD(04^r*  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 7o7FW=^  
           p_y = k_ac * p_x + b_ac Y%(8'Ch  
        End Select eG
.s|0`  
      rt(1) = p_x ;1r|Bx
<5  
      rt(2) = p_y z\WyL;  
     x69RQ+Vw  
'计算最大半径 >Wd_?NaI  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 5+(Cp3
  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) {aU|BdATI  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) - Sn]`  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) >I+p;V$@  
Dim bb(5) As Single [l~G7u.d  
  bb(1) = rr1 _0iV6Bj  
  bb(2) = rr2 ArT@BqWd  
  bb(3) = rr3 =C7<I   
  bb(4) = rr4 .lSoC`HE  
  nb = rr1 nH+wU;M  
For i = 1 To 4 I&% Z*H  
    If nb <= bb(i) Then g-/ }*ml  
       nb = bb(i) _.m|Ml,`{  
    End If @)ls+}=Y  
Next i $L'[_J  
    rt(0) = Sqr(nb) 2frwU~y  
    rr = rt() !_iv~Q zv  
  End If Jgq#m~M6  
         ~svea>Fmr  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  rkz84wDx  

CXTtN9N9  
有热压工艺方面的人才或者资料分享下； VeOM `jy  
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 =o'g5Be<F  

高手真多！

楼主威武霸气.