[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： ,'{B+CHoS  
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描述:请输入描述

图片:2.jpg

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关键点说几个： 9@>hm>g.  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） :<3;7R'5  
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 hfa_M[#Q-  
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 WG=r? xE  

以下是几个重要的函数： nE.s  
1.判断点在区域中函数 d"uM7PMs7x  
2.计算夹角函数 7ib<Cb>K  
3.转置函数 ]-OkW.8d1  
4.得到区域中心点，及区域半径函数 c`=hK*  
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） `,=p\g|D  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 I=I%e3GEm  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single u3!!_~6,z  
   cax = x2 - x1 \K=PIcH  
   cay = y2 - y1 U^S:2  
   cbx = x2 - x3 $l"(tB7d  
   cby = y2 - y3 2xm?,p`  
   mo_jj = cax * cbx + cay * cby I#e*,#'S  
   mo_ca = Sqr(cax * cax + cay * cay) LM`#S/h  
   mo_cb = Sqr(cbx * cbx + cby * cby) +& Qqu`)?F  
   cos_acb = mo_jj / (mo_ca * mo_cb) [$+61n}.12  
   'ff_cos = cos_acb (~o+pp!  
   If cos_acb >= 1 Then (jMp`4P  
   nn = 0 3Or3@e5r  
   ElseIf cos_acb <= -1 Then j* ja)  
   nn = 3.14159265258979 JYUKs~Qt  
   Else (acRYv(  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) M" \y2   
   End If 7:<>#  
   'ff_angle = nn .6(i5K  
   ff_angle = nn * 180 / 3.14159265258979 g}h0J%s
 
End Function

'判断点在区域内函数 7MfvU|D[d/  
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 Ric$Xmu
  
Dim aob, boc, cod, doa, sum As Single ;T(^riAEl  
  If ppx = p1x And ppy = p1y Then ,+{ 43;a  
     point_in = True sk/Mh8z  
     Exit Function O^hV<+CX  
  End If Su^Z{ Ud`  
  If ppx = p2x And ppy = p2y Then A&#Bf#!G  
     point_in = True }%|OnEk"  
     Exit Function ],m-,K  
  End If ,;}RIcvQV  
   If ppx = p3x And ppy = p3y Then -ybupUJcbv  
     point_in = True %*hBrjbj  
     Exit Function H2p;J#cv@  
  End If x;/3_"$9>\  
     l0V@19Ec  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) F.9|$g*ip  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) yuq E  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ,.B8hr@H6-  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) HC$cK+,ZU}  
    sum = aob + boc + cod + doa ,$>Z= ~x*  
    If 360.01 > sum And sum > 359.99 Then Z )I4U  
       point_in = True ^ TS\x/P  
    Else fC[gu$f][  
       point_in = False 0rj*SC_  
    End If JJr<cZ4]  
End Function

'得到点半径,得到交点坐标函数 g$qh(Z_s  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() 8,Z0J  
    '求得中心点坐标 m[XN,IE#u  
Dim tt As String !~#31kL&  
Dim rt(3) As Single l%O-c}X  
    '判断是否平行 {_JLmyaerZ  
   acx = p3x - p1x &DV'%h>i=  
   acy = p3y - p1y jdzV&  
   bdx = p4x - p2x cW2:D$Pe  
   bdy = p4y - p2y T/ov0l_  
   If acx * bdy = acy * bdx Then utXcfKdt  
      rt(0) = 0 @QEVl
 
      Exit Function Ok
M>  
   Else K':f!sZ&2  
      '判断斜率存在否 b< rM3P;  
      If p1x = p3x And p2x <> p4x Then }`X$ '  
         tt = "ac_n_bd_y" "(5}=T@,  
      ElseIf p1x <> p3x And p2x = p4x Then [ kknY+n1  
         tt = "ac_y_bd_n" +q(D]:@,[  
      ElseIf p1x <> p3x And p2x <> p4x Then [g{}0[ew  
         tt = "ac_y_bd_y" #rC% \  
      End If Zo`^pQS  
    Select Case tt @UA>6F  
         Case "ac_n_bd_y" xFJ>s-g*  
            'bd线段方程 `u-}E9{  
            k_bd = bdy / bdx 5"sF#Y&  
            b_bd = p2y - k_bd * p2x j(SQNSFD  
            p_x = p1x mnePm{  
            p_y = k_bd * p_x + b_bd >&TktQO_T  
         Case "ac_y_bd_n" S'WmPv  
            'ac线段方程 psMagzr&)e  
            k_ac = acy / acx 5]{YERa'  
            b_ac = p1y - k_ac * p1x zAH+{4lC+  
            p_x = p2x # a3Q<%V  
            p_y = k_ac * p_x + b_ac |(/"IS]  
        Case "ac_y_bd_y" $
?GF]BT  
           'ac，bd线段都要求 4bO7rhve  
           k_ac = acy / acx q*T+8O  
           b_ac = p1y - k_ac * p1x i55']7+0  
           k_bd = bdy / bdx oxRu:+N
 
           b_bd = p2y - k_bd * p2x N\p3*#M  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) @=9QV3D  
           p_y = k_ac * p_x + b_ac wxoBq{r;  
        End Select d#(xP2  
      rt(1) = p_x 8z+ CYeV  
      rt(2) = p_y YrdK@I  
     4-TM3Cw`d&  
'计算最大半径 qn<~ LxQ  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) "e(Nh%t  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) JeO(sj$e  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) }NUP[%
  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) `527vK 6  
Dim bb(5) As Single 7==Uoy*O  
  bb(1) = rr1 4Iz~3fqB7  
  bb(2) = rr2 NZ Xmrc{S  
  bb(3) = rr3 ub-ZrC'  
  bb(4) = rr4 `InS8PLr  
  nb = rr1
\}cEHLq  
For i = 1 To 4 IQR?n}ce  
    If nb <= bb(i) Then _G`kj{J  
       nb = bb(i) :imp~~L;  
    End If .~Td/o7  
Next i oJ5V^.  
    rt(0) = Sqr(nb) D].1X0^hp  
    rr = rt() /Wt<[g#  
  End If Ru2kC} Dx!  
         MbF.KmV  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  m!#'4  

sQ"; t=yC  
有热压工艺方面的人才或者资料分享下； F .hA.E  
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 "($"T v2  

高手真多！

楼主威武霸气.