[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： zKO7`.*  
Xq*^6*E-}  

描述:请输入描述

图片:2.jpg

G @..?>  

关键点说几个： &12KpEyf  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ,50
 
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 YAr6cl  
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 _rT\?//B  

以下是几个重要的函数： sgX!4wG&Z  
1.判断点在区域中函数 H}^
'  
2.计算夹角函数 K4c:k; V  
3.转置函数 'o>)E>  
4.得到区域中心点，及区域半径函数 e1m
?g&[  
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） !eLj+0  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 QU"WpkO  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single h0GoF A<  
   cax = x2 - x1 aF{_"X2  
   cay = y2 - y1 *o6}>;  
   cbx = x2 - x3 ^X
=Q{nB  
   cby = y2 - y3 WRh5v8Wz0  
   mo_jj = cax * cbx + cay * cby R'Sd'pSDN  
   mo_ca = Sqr(cax * cax + cay * cay) fE#(M+(<  
   mo_cb = Sqr(cbx * cbx + cby * cby) QQ*
sjK.(  
   cos_acb = mo_jj / (mo_ca * mo_cb) {%V(Dd[B6  
   'ff_cos = cos_acb ;O"?6d0  
   If cos_acb >= 1 Then oxwbq=a6yV  
   nn = 0 9BCW2@Kp  
   ElseIf cos_acb <= -1 Then XH%L]  
   nn = 3.14159265258979 *LT~:Gs#  
   Else o>el"0rn.h  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Y[ G_OoU  
   End If .Ro
/ioq  
   'ff_angle = nn :cT)M(o  
   ff_angle = nn * 180 / 3.14159265258979 7F
B?t<x  
End Function

'判断点在区域内函数 FXQWT9Kk~_  
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 P"YdB
|I  
Dim aob, boc, cod, doa, sum As Single  j]u!;]  
  If ppx = p1x And ppy = p1y Then 4>JSZ6i#n  
     point_in = True E C?}iP  
     Exit Function ewDYu=`*  
  End If A2_ut6&eb  
  If ppx = p2x And ppy = p2y Then
}0'=}BE  
     point_in = True `MtzA^Xr  
     Exit Function ]?9*Vr:P^  
  End If !8{VLg  
   If ppx = p3x And ppy = p3y Then 5{c;I<0  
     point_in = True Ayz*2N`%  
     Exit Function @Jt$92i5PS  
  End If JGs:RD'  
     <2$vo  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Q@D7\<t  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) du65=w4E!  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) %I1@{>OxG  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) { 3G  
    sum = aob + boc + cod + doa L9GLjRp-  
    If 360.01 > sum And sum > 359.99 Then .<x6U*)\O  
       point_in = True wk(25(1q  
    Else Y(Q 0m|3P  
       point_in = False 2d)Dhxzxk  
    End If -Q WvB  
End Function

'得到点半径,得到交点坐标函数 f:o.[4p2  
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() M2$/x`\-~  
    '求得中心点坐标 ,
d"T2Hy  
Dim tt As String ;6tra_  
Dim rt(3) As Single m#"_x{oa  
    '判断是否平行 MZgaQUg  
   acx = p3x - p1x }:m#}s  
   acy = p3y - p1y ddn IKkOp  
   bdx = p4x - p2x iZGbNN  
   bdy = p4y - p2y {K^5q
{u  
   If acx * bdy = acy * bdx Then qv!(In>u  
      rt(0) = 0 kmQ:wf:  
      Exit Function `<XS5h h=  
   Else HqGI.  
      '判断斜率存在否 l*CulVX  
      If p1x = p3x And p2x <> p4x Then |J$A%27  
         tt = "ac_n_bd_y" ]_KWN$pd  
      ElseIf p1x <> p3x And p2x = p4x Then vNO&0~  
         tt = "ac_y_bd_n" TWP@\ BQ  
      ElseIf p1x <> p3x And p2x <> p4x Then * #yF`_p  
         tt = "ac_y_bd_y" pb!2G/,.[  
      End If \!ZA#7  
    Select Case tt h ldZA  
         Case "ac_n_bd_y" }7PJr/IuF  
            'bd线段方程 `?VK(<w0q  
            k_bd = bdy / bdx 5Tsz|k  
            b_bd = p2y - k_bd * p2x y?sz&*:  
            p_x = p1x YwVA].p@TI  
            p_y = k_bd * p_x + b_bd l\_!oa~  
         Case "ac_y_bd_n" x{H+fq,M  
            'ac线段方程 ;qmnG3;Q  
            k_ac = acy / acx SSe;&Jk2d  
            b_ac = p1y - k_ac * p1x ^ AZ#tp%)  
            p_x = p2x
[R]V4Hb  
            p_y = k_ac * p_x + b_ac |d0X1
(  
        Case "ac_y_bd_y" 01(U)F\  
           'ac，bd线段都要求 P~7(x7/7~  
           k_ac = acy / acx Bg|d2,im  
           b_ac = p1y - k_ac * p1x fTxd8an{  
           k_bd = bdy / bdx [Rj4=qq=  
           b_bd = p2y - k_bd * p2x !@C-|=9G  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) W ?x~"-*  
           p_y = k_ac * p_x + b_ac ^-%'ItVO  
        End Select T;u
;r@R/  
      rt(1) = p_x T{prCM  
      rt(2) = p_y |Iy;_8c  
     3.movkj  
'计算最大半径 xI,3(A.  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) LWrYKi  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) L7ae6#5.  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 2)EqqX[D  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 3MQHoxX  
Dim bb(5) As Single R0t!y3r&N  
  bb(1) = rr1 D#nHg  
  bb(2) = rr2 m2SJ\1 J=  
  bb(3) = rr3 <?41-p-;  
  bb(4) = rr4 6AIq
oX*p  
  nb = rr1 &Wy>t8DIK  
For i = 1 To 4 ~n -N  
    If nb <= bb(i) Then BOpZ8p'eH1  
       nb = bb(i) ru:"c^W:[  
    End If u<j;+-]8h  
Next i P`rfDQoZ  
    rt(0) = Sqr(nb) UDHOcb  
    rr = rt() `yR/M"u6T  
  End If JCH9~n.  
         vhMoCLb  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  -7oIphJ=\  

^0"fPG`  
有热压工艺方面的人才或者资料分享下； n[BYBg1yG  
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 lhQMR(
w^  

高手真多！

楼主威武霸气.