[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： D#`>p  
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关键点说几个： Oz&*A/si+3  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） W:9l"'  
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 3J/l>1[  
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 voTP,R[}85  

以下是几个重要的函数： 5v`lCu]  
1.判断点在区域中函数 p&)d]oV>  
2.计算夹角函数 cnw+^8  
3.转置函数 gf9U<J#&C  
4.得到区域中心点，及区域半径函数 Je2&7uR0  
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） `CBXz!v!O  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 $;~YgOVZ5  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Br42Qo2"T>  
   cax = x2 - x1 X%N!gy  
   cay = y2 - y1 ~F-lO1  
   cbx = x2 - x3 I3'UrKKO  
   cby = y2 - y3 jt9- v-  
   mo_jj = cax * cbx + cay * cby {cO8q }L  
   mo_ca = Sqr(cax * cax + cay * cay) '$'a .q1q9  
   mo_cb = Sqr(cbx * cbx + cby * cby) "O|.e`C%^  
   cos_acb = mo_jj / (mo_ca * mo_cb) SyT{k\[  
   'ff_cos = cos_acb G!G:YVWXP  
   If cos_acb >= 1 Then !y>up+cRjl  
   nn = 0 "M\rO!f:  
   ElseIf cos_acb <= -1 Then uqa pj("  
   nn = 3.14159265258979 UugR  
   Else Ht/#d6c
Q  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ~{-Ka>A  
   End If PlK3;  
   'ff_angle = nn Gr)G-zE  
   ff_angle = nn * 180 / 3.14159265258979 o2hZ=+w>  
End Function

'判断点在区域内函数 fkImX:|q  
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 >j$a
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Dim aob, boc, cod, doa, sum As Single /me ]sOkn  
  If ppx = p1x And ppy = p1y Then %g89eaEZ  
     point_in = True Ex|Z@~T12  
     Exit Function NXDkGO/*  
  End If 2QEH!)lvr  
  If ppx = p2x And ppy = p2y Then .J&89I]U  
     point_in = True quC$<Y  
     Exit Function ?TIi0;h  
  End If v&7<f
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   If ppx = p3x And ppy = p3y Then ` "-P g5  
     point_in = True >9i>A:  
     Exit Function $>uUn3hSx\  
  End If ,O:p`"3`0=  
     vWrTB   
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y)  7
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    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) |`Yn'Mj8rm  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) yV(9@lj3;  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) e{Vn{.i,5  
    sum = aob + boc + cod + doa (: kn)  
    If 360.01 > sum And sum > 359.99 Then 0dS(g&ZR  
       point_in = True N#)Klq87z  
    Else S1@r.z2L  
       point_in = False Nq\)o{<1  
    End If Q=vo5)t   
End Function

'得到点半径,得到交点坐标函数 V>E7!LIn.  
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() .f;@OqU  
    '求得中心点坐标 :pz@'J  
Dim tt As String HkhZB^_V  
Dim rt(3) As Single #902x*Z'c"  
    '判断是否平行 L]"$dF  
   acx = p3x - p1x _h,_HW)G  
   acy = p3y - p1y xx7&y!_  
   bdx = p4x - p2x >+.GBf<E  
   bdy = p4y - p2y 0kls/^0,  
   If acx * bdy = acy * bdx Then x>BFK@#  
      rt(0) = 0 }Y!s:w#  
      Exit Function Rbr:Q]zGN  
   Else Y"KJ`Rx  
      '判断斜率存在否 ^-n^IR}J  
      If p1x = p3x And p2x <> p4x Then n+Conp/  
         tt = "ac_n_bd_y" "$K]+0ryG<  
      ElseIf p1x <> p3x And p2x = p4x Then *<SXzJ(  
         tt = "ac_y_bd_n" c(FGW7L
<  
      ElseIf p1x <> p3x And p2x <> p4x Then *b0z/6  
         tt = "ac_y_bd_y" v,ni9DIu  
      End If @|">j#0  
    Select Case tt 5rCJIl.  
         Case "ac_n_bd_y" &(Hw:W9  
            'bd线段方程 |wQ3+WN|  
            k_bd = bdy / bdx Bz>f  
            b_bd = p2y - k_bd * p2x _LfbEv<,T  
            p_x = p1x !Y7$cU &  
            p_y = k_bd * p_x + b_bd !Icznou\
  
         Case "ac_y_bd_n" $^czqA-&  
            'ac线段方程 Oj_F1. r  
            k_ac = acy / acx aUc#,t;Qd  
            b_ac = p1y - k_ac * p1x zw$\d1-+h  
            p_x = p2x KU0Ad);e  
            p_y = k_ac * p_x + b_ac L>E{~yh  
        Case "ac_y_bd_y" ^J^FGo|M  
           'ac，bd线段都要求 1uG)U)y/Q  
           k_ac = acy / acx Z02EE-
A  
           b_ac = p1y - k_ac * p1x T<Qa`|5>  
           k_bd = bdy / bdx F6Q%<p a  
           b_bd = p2y - k_bd * p2x 9xw"NcL  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) oAB:H\  
           p_y = k_ac * p_x + b_ac dV'^K%#  
        End Select ;qbK[3.  
      rt(1) = p_x t:P]bp^#  
      rt(2) = p_y EL z5P}L6  
     wmXI8'~F&  
'计算最大半径
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   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) i1KjQ1\a+  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) c>3? T^=  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) J]S30&?  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ~7g$TAe{  
Dim bb(5) As Single l7VTuVGUJ  
  bb(1) = rr1 t>*(v#WeZ  
  bb(2) = rr2 60A!Gob  
  bb(3) = rr3 8<C@I/  
  bb(4) = rr4 dhJ=+Fz"w  
  nb = rr1 !?+0O]`}  
For i = 1 To 4 OQ 4h8,  
    If nb <= bb(i) Then $XMpC
{  
       nb = bb(i) h>cjRH?e  
    End If a&)!zhVP  
Next i }opMf6`w  
    rt(0) = Sqr(nb) ?P>4H0@I+  
    rr = rt() tf8xc  
  End If 5_L,7\5#  
         K4]ZVMm/*  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  M<NY`7$^  

_-543B}  
有热压工艺方面的人才或者资料分享下； 'kY/=*=Q  
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 yE,qLiH  

高手真多！

楼主威武霸气.