[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： E^.nc~  
Nd$W0YN:  
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关键点说几个： lfqiyYFm  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） j@SQ~AS  
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 W3MU1gl6k{  
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 M luVx'  

以下是几个重要的函数： BT}!W`  
1.判断点在区域中函数 #,":vr  
2.计算夹角函数 ?u" 4@  
3.转置函数 6YGubH7%_  
4.得到区域中心点，及区域半径函数 yCVI\y\B  
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） |}(`kW  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 P)Rh=U  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single , udTvI  
   cax = x2 - x1 +tr
C,D  
   cay = y2 - y1 ;"dV"W  
   cbx = x2 - x3 ms*(9l.hOK  
   cby = y2 - y3 _"bHe/'CI  
   mo_jj = cax * cbx + cay * cby 925|bX6I  
   mo_ca = Sqr(cax * cax + cay * cay) y5?RVlKJ  
   mo_cb = Sqr(cbx * cbx + cby * cby) G9xmmc  
   cos_acb = mo_jj / (mo_ca * mo_cb) w5Ay)lz  
   'ff_cos = cos_acb 9~]~#Uj  
   If cos_acb >= 1 Then YjxF}VI~<  
   nn = 0 GO`Ru 8  
   ElseIf cos_acb <= -1 Then 4dO~C  
   nn = 3.14159265258979 MvK !u  
   Else ]rWgSID  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) VyzS^AHK  
   End If "alyfyBu'M  
   'ff_angle = nn '98VYCL  
   ff_angle = nn * 180 / 3.14159265258979 pTPi@SBaP{  
End Function

'判断点在区域内函数 YG@t5j#b  
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 /Z~<CbKKl  
Dim aob, boc, cod, doa, sum As Single 'gC_)rK*  
  If ppx = p1x And ppy = p1y Then bM{s T"  
     point_in = True iBF|&h(\  
     Exit Function 9 Vkb>yFX'  
  End If LhOa{1SY  
  If ppx = p2x And ppy = p2y Then ]s'Q_wh_-v  
     point_in = True L ^q""[  
     Exit Function qU%/W|LY  
  End If piPR=B+  
   If ppx = p3x And ppy = p3y Then . $BUw  
     point_in = True :~2vJzp@?  
     Exit Function gp>3I!bo[K  
  End If ar__ Pf6r  
     >,F bX8Zz  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) z\K"Rg~J  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) yXSFjcoB  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Y$Zx,  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y)  .E`\MtA  
    sum = aob + boc + cod + doa ~Sj9GxTe  
    If 360.01 > sum And sum > 359.99 Then ,}3 'I [  
       point_in = True hIy~B['  
    Else n^Hm;BiE#  
       point_in = False hQYL`Dni  
    End If vB.E3r=  
End Function

'得到点半径,得到交点坐标函数 mk.9OhYY  
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() .+PI}[g  
    '求得中心点坐标 %|auAq&w  
Dim tt As String g;pcZ9o
 
Dim rt(3) As Single bo2H]PL*  
    '判断是否平行 e>6y%v;  
   acx = p3x - p1x ]~9tYn  
   acy = p3y - p1y kZR8a(4D  
   bdx = p4x - p2x O#ai)e_uQk  
   bdy = p4y - p2y ck:T,F{}  
   If acx * bdy = acy * bdx Then 6a[}'/  
      rt(0) = 0 6HT;#Znn  
      Exit Function \y97W&AN  
   Else 5eLtCsHz  
      '判断斜率存在否 LInz<bc<(  
      If p1x = p3x And p2x <> p4x Then ,]|#[8  
         tt = "ac_n_bd_y" Vc 1\i  
      ElseIf p1x <> p3x And p2x = p4x Then %RTBV9LIXr  
         tt = "ac_y_bd_n" T-
.%  
      ElseIf p1x <> p3x And p2x <> p4x Then #eoome2Q  
         tt = "ac_y_bd_y" Bo)3!wO8  
      End If 2^r<{0@n  
    Select Case tt `g(Y*uCp  
         Case "ac_n_bd_y" EAT"pxP  
            'bd线段方程 /a{la8Ni  
            k_bd = bdy / bdx ]^yFaTfS  
            b_bd = p2y - k_bd * p2x ,f~J`3(&  
            p_x = p1x &Y!-%{e  
            p_y = k_bd * p_x + b_bd Ur9?Td'*>  
         Case "ac_y_bd_n" 6/5YjO|a  
            'ac线段方程 ^H~h\,;zQ  
            k_ac = acy / acx n`#tKwWHYx  
            b_ac = p1y - k_ac * p1x {x|[p_?  
            p_x = p2x 3k\#CiB{  
            p_y = k_ac * p_x + b_ac RiDJ> 6S  
        Case "ac_y_bd_y" SEo'(-5  
           'ac，bd线段都要求 sZjQ3*<-r  
           k_ac = acy / acx x3hB5p$q  
           b_ac = p1y - k_ac * p1x 52%2R]G!  
           k_bd = bdy / bdx QX!-B  
           b_bd = p2y - k_bd * p2x UbXh,QEG*  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) dzARI`  
           p_y = k_ac * p_x + b_ac ( Z619w  
        End Select FEW14U'O  
      rt(1) = p_x o*b] p-  
      rt(2) = p_y O8+7g+J=!  
     rA3$3GLQ-  
'计算最大半径 D[4u+g?[}>  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) L5Ebc#  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) _tiujP  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 3_ r*y9l  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) G/k2Pe{SL  
Dim bb(5) As Single <lgYcdJ   
  bb(1) = rr1 o m^0}$V  
  bb(2) = rr2 {o)Lc6T8s  
  bb(3) = rr3 QiQ_bB!\  
  bb(4) = rr4 ]_Vx{oT7  
  nb = rr1 VyXKZ%\dQ/  
For i = 1 To 4 8hu<E4]L  
    If nb <= bb(i) Then 0g +7uGp:  
       nb = bb(i) U\ ig:  
    End If P60~V"/P  
Next i ./-5R|fN  
    rt(0) = Sqr(nb) [glLre^  
    rr = rt() u7Y WnD  
  End If ?h3Y)5xT  
         ,g%0`SO  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  -B>++r2A^  

JHW"-b  
有热压工艺方面的人才或者资料分享下； h&|[eZt?F  
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 ];}Wfl  

高手真多！

楼主威武霸气.