[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： MHeUh[%(  
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关键点说几个： BbsgZ4  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） DB%}@IW"  
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 'K&^y%~py,  
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 ndg1E;>  

以下是几个重要的函数： 7>.d*?eao\  
1.判断点在区域中函数 mxD]`F  
2.计算夹角函数 I
R JN  
3.转置函数 -&q@|h'  
4.得到区域中心点，及区域半径函数 ;>hRj!  
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） @=_4i&]$  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 yz}ik^T  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single B(|*
u  
   cax = x2 - x1 >0F)^W?  
   cay = y2 - y1 CP0;<}k  
   cbx = x2 - x3 90wGS_P04  
   cby = y2 - y3 J.;!l   
   mo_jj = cax * cbx + cay * cby M$u.lI  
   mo_ca = Sqr(cax * cax + cay * cay) W&~\@j]!D  
   mo_cb = Sqr(cbx * cbx + cby * cby) i~3\jD=<  
   cos_acb = mo_jj / (mo_ca * mo_cb) m^!Kthq  
   'ff_cos = cos_acb b~$8<\  
   If cos_acb >= 1 Then @7HHi~1JK  
   nn = 0 '\B0#z3  
   ElseIf cos_acb <= -1 Then \LG0  
   nn = 3.14159265258979 >\br8=R  
   Else QM('bbN  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) dNu?O>=  
   End If L"KKW c  
   'ff_angle = nn Y`NwE  
   ff_angle = nn * 180 / 3.14159265258979 7D(Eo{ue  
End Function

'判断点在区域内函数 )O],$\u  
Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean R XN0v@V  
Dim aob, boc, cod, doa, sum As Single buldA5*!o  
  If ppx = p1x And ppy = p1y Then `+h+X9  
     point_in = True 3xk-D &"  
     Exit Function 4wKQs&:  
  End If !J&
UO/q.  
  If ppx = p2x And ppy = p2y Then 8-_atL  
     point_in = True H Y~[/H+:  
     Exit Function 2T?8{yO7  
  End If `@xnpA]l  
   If ppx = p3x And ppy = p3y Then cG"wj$'w  
     point_in = True b_&:tE--]  
     Exit Function ?[]jJ  
  End If ,|g&v/WlC%  
     g@'2 :'\  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) C2CR#b=)i  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y)  :yw8_D3  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) :d6]rOpX  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) `>4"i+NFF8  
    sum = aob + boc + cod + doa [K
g3:]2A  
    If 360.01 > sum And sum > 359.99 Then eZ]>;5  
       point_in = True e45)t}'  
    Else +B[XTn,Cru  
       point_in = False U3jnH  
    End If d]USk&8  
End Function

'得到点半径,得到交点坐标函数 Q/@ pcU  
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() mPF<2:)wv  
    '求得中心点坐标 e,xJ%f  
Dim tt As String }vU^gPH  
Dim rt(3) As Single z6Fl$FFP  
    '判断是否平行 iGSF5S  
   acx = p3x - p1x E9b>wP  
   acy = p3y - p1y L=<$^m  
   bdx = p4x - p2x Q,M,^_  
   bdy = p4y - p2y T_qM@/f  
   If acx * bdy = acy * bdx Then GTi=VSGqF  
      rt(0) = 0 f9OY>|a9  
      Exit Function m70AWG  
   Else !<HF764@`  
      '判断斜率存在否 \T[OF8yhW  
      If p1x = p3x And p2x <> p4x Then ,k1ns?i9KH  
         tt = "ac_n_bd_y" ~
# \{'<  
      ElseIf p1x <> p3x And p2x = p4x Then gL~3z'$  
         tt = "ac_y_bd_n" \x<,Ma=D  
      ElseIf p1x <> p3x And p2x <> p4x Then ^I9U<iNIL  
         tt = "ac_y_bd_y" 37biRXqLH  
      End If JC`;hY  
    Select Case tt Q8A+\LR~)  
         Case "ac_n_bd_y" ]heVR&bQ  
            'bd线段方程 Lxn-M5RPQ  
            k_bd = bdy / bdx @#*{* S8  
            b_bd = p2y - k_bd * p2x )Y&B63]B  
            p_x = p1x k%8kt4\wn6  
            p_y = k_bd * p_x + b_bd <>(v~a]  
         Case "ac_y_bd_n" ]N,'3`&::  
            'ac线段方程 LN)yQ-  
            k_ac = acy / acx O3?^P"C  
            b_ac = p1y - k_ac * p1x lKf kRyO_S  
            p_x = p2x 7L!}
F;yT  
            p_y = k_ac * p_x + b_ac mhM;`dl  
        Case "ac_y_bd_y" wz
@[rMf  
           'ac，bd线段都要求 >Hmho'  
           k_ac = acy / acx j+>[~c;0)  
           b_ac = p1y - k_ac * p1x t\]kVo)  
           k_bd = bdy / bdx H]*B5Jv~  
           b_bd = p2y - k_bd * p2x "$b{EYq6  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) I?nU+t;  
           p_y = k_ac * p_x + b_ac EuA352x  
        End Select iaQfxQP1w%  
      rt(1) = p_x `
gF]  
      rt(2) = p_y V6+:g=@U-l  
     \),zDO+  
'计算最大半径 nET<u;  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) QpiDBJCL  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) I.Xbowl  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) t0Lt+E|J  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Ki1 zi~  
Dim bb(5) As Single *>!-t   
  bb(1) = rr1 1d842pt  
  bb(2) = rr2 <Fv7JPN%  
  bb(3) = rr3 5!wjYQt3  
  bb(4) = rr4 c,]fw2  
  nb = rr1 TwF.UL@G%  
For i = 1 To 4 >s!k"s,  
    If nb <= bb(i) Then D+N@l"U{  
       nb = bb(i) &4%78K\  
    End If QxuU3#l  
Next i ~OLyG$JJ  
    rt(0) = Sqr(nb) uKTYb#E7  
    rr = rt() 6ZwQ/~7H  
  End If t8;nP[`  
         82V;J 8T?  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  o{l]


n*  

5`i+aH(  
有热压工艺方面的人才或者资料分享下； ?iamo.0zN  
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 \JCpwNT{P  

高手真多！

楼主威武霸气.