[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： LX#gc.c  
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关键点说几个： }
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1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） <T&v\DN  
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 D}Sww5ZmP  
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 <. *bJ  

以下是几个重要的函数： <'N:K@Cs  
1.判断点在区域中函数 fP\q?X@]E  
2.计算夹角函数 8QoxU" c&  
3.转置函数 i1!1'T8  
4.得到区域中心点，及区域半径函数 ~clX2U8u`  
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） D <R_eK  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 
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Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Cs7ol-\)  
   cax = x2 - x1 JO+tY[q  
   cay = y2 - y1 9)NKI02M|  
   cbx = x2 - x3 0%dOi ko  
   cby = y2 - y3 bd~m'cob>  
   mo_jj = cax * cbx + cay * cby b^Re947{g  
   mo_ca = Sqr(cax * cax + cay * cay) Q
A*<$v  
   mo_cb = Sqr(cbx * cbx + cby * cby) t>/x-{bH\  
   cos_acb = mo_jj / (mo_ca * mo_cb) -v.\W y~\  
   'ff_cos = cos_acb ?-vWNv  
   If cos_acb >= 1 Then b&mA1w[W]  
   nn = 0 3ie k>'T  
   ElseIf cos_acb <= -1 Then }b&lHr'Uw  
   nn = 3.14159265258979 oV0T   
   Else V<J1.8H  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) dN)8r  
   End If oDMPYkpTu  
   'ff_angle = nn OyF=G^w  
   ff_angle = nn * 180 / 3.14159265258979 nOvR, 6  
End Function

'判断点在区域内函数 LSou]{R  
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 =JIceLL  
Dim aob, boc, cod, doa, sum As Single `}l%61n0  
  If ppx = p1x And ppy = p1y Then '7sf)0\:<p  
     point_in = True <-`.u`  
     Exit Function BX0lk  
  End If :^3)[.m  
  If ppx = p2x And ppy = p2y Then cQj`W *  
     point_in = True +9b{Y^^~T  
     Exit Function I.jqC2G  
  End If uI7n{4W*x  
   If ppx = p3x And ppy = p3y Then $:F+Nf 8  
     point_in = True >0{}tRm-P&  
     Exit Function U.Mfu9}#:  
  End If [! $NTt_  
     Xkhd"Axi  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) noxJr/A]  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) o:AfEoH"~  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) `s CwgY+  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 2F:qaz  
    sum = aob + boc + cod + doa .d1ff];  
    If 360.01 > sum And sum > 359.99 Then .C% 28fH  
       point_in = True 5)!g.8-!  
    Else $ZBYOA  
       point_in = False *H QcI-  
    End If |:1{B1sqA  
End Function

'得到点半径,得到交点坐标函数 w>%@Ug["  
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() FJ;I1~??  
    '求得中心点坐标 FH~:&;  
Dim tt As String Xqf,_I=V  
Dim rt(3) As Single yajdRU  
    '判断是否平行 BO[:=x`  
   acx = p3x - p1x 3kn-tM  
   acy = p3y - p1y MR#*/Iw~  
   bdx = p4x - p2x ;+9OzF ;  
   bdy = p4y - p2y 'C[tPP  
   If acx * bdy = acy * bdx Then T}#iXgyx  
      rt(0) = 0 ax&?Z5%a  
      Exit Function @Vm*b@  
   Else xlI=)ak{  
      '判断斜率存在否 5C Dk5B_  
      If p1x = p3x And p2x <> p4x Then 'R7 \  
         tt = "ac_n_bd_y" Cr.YSWg)4  
      ElseIf p1x <> p3x And p2x = p4x Then z#*.9/y\^R  
         tt = "ac_y_bd_n" y\?ey
'o  
      ElseIf p1x <> p3x And p2x <> p4x Then n|i:4D  
         tt = "ac_y_bd_y" RzEzNV  
      End If GKBoSSnV&  
    Select Case tt XiW1X6  
         Case "ac_n_bd_y" 76nH)^%l<  
            'bd线段方程 Su#0F0  
            k_bd = bdy / bdx %* "+kwZ  
            b_bd = p2y - k_bd * p2x Tq1\  
            p_x = p1x |+#Zuq  
            p_y = k_bd * p_x + b_bd xRh 22z  
         Case "ac_y_bd_n" -k'<6op  
            'ac线段方程 H[=\_X1o(  
            k_ac = acy / acx `w@:h4f  
            b_ac = p1y - k_ac * p1x rAenxZ,tF  
            p_x = p2x 86ao{l6lC  
            p_y = k_ac * p_x + b_ac Ln+l'&_nb  
        Case "ac_y_bd_y" S=UuEmU5N  
           'ac，bd线段都要求 UC!mp?   
           k_ac = acy / acx ?cV,lak  
           b_ac = p1y - k_ac * p1x RN$vKJk  
           k_bd = bdy / bdx <kn2
 
           b_bd = p2y - k_bd * p2x >ahDc!Jyu  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) L:i&OCU2k  
           p_y = k_ac * p_x + b_ac 8D*7{Q  
        End Select l]*RiK2AC  
      rt(1) = p_x )x.%P
UA  
      rt(2) = p_y n Bu!2c  
     f|d~=\0y  
'计算最大半径 +3v)@18B1  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) u$nzpw0=H  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) y=3 dGOFB  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) o@meogkL  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) A  6(`  
Dim bb(5) As Single 3?93Pj3oPt  
  bb(1) = rr1 "hIYf7r##  
  bb(2) = rr2 q<YM,%mgj  
  bb(3) = rr3 O
a[  
  bb(4) = rr4 ",#.?vT`  
  nb = rr1 Al$z.i?R  
For i = 1 To 4 X4;U4pU#  
    If nb <= bb(i) Then 3smk
Y  
       nb = bb(i) 2#wnJdr6E  
    End If )2f#@0SVL  
Next i }Fe~XO`  
    rt(0) = Sqr(nb) wh:;G`6S  
    rr = rt() \/ bd  
  End If s^kG]7  
         J)|3jbX"I]  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  \M`qaFan5^  

zTng]Mvx  
有热压工艺方面的人才或者资料分享下； <) * U/r  
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 .s{"NqRA  

高手真多！

楼主威武霸气.