[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： ZKa.MBde  
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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： r}y]B\/  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 8L<G
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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 J34lu{'if  
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 \P_1@sH=  

以下是几个重要的函数： 4#Fz!Km  
1.判断点在区域中函数 &zr..i4O  
2.计算夹角函数 ui,#AZQ#{4  
3.转置函数 sWB;?7P  
4.得到区域中心点，及区域半径函数 m1X0stFRs"  
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） \KmjA)(  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 x
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Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single (
ydu
U  
   cax = x2 - x1 >WMH.5p  
   cay = y2 - y1 jZcjiOX  
   cbx = x2 - x3 ?]081l7cd  
   cby = y2 - y3 *s/sF@8<X  
   mo_jj = cax * cbx + cay * cby Af:4 XSO6  
   mo_ca = Sqr(cax * cax + cay * cay) )FM
/^  
   mo_cb = Sqr(cbx * cbx + cby * cby) s%Q pb{  
   cos_acb = mo_jj / (mo_ca * mo_cb) q#-szZQ  
   'ff_cos = cos_acb 9~DoF]TM  
   If cos_acb >= 1 Then u2^oXl  
   nn = 0 (u-i{<   
   ElseIf cos_acb <= -1 Then m&DDz+g  
   nn = 3.14159265258979 Pq~"`-h7:  
   Else <L@0w8i`  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) >A|6kzC  
   End If 8@|_];9#.  
   'ff_angle = nn . \*Z:  
   ff_angle = nn * 180 / 3.14159265258979 .!Kdi|a)  
End Function

'判断点在区域内函数 2"C'Au  
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 _d&zHlc_  
Dim aob, boc, cod, doa, sum As Single 59O;`y0  
  If ppx = p1x And ppy = p1y Then GwV2`2  
     point_in = True Deq
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     Exit Function {j[[E/8N!y  
  End If 5.#r\' Z#  
  If ppx = p2x And ppy = p2y Then to^ &:  
     point_in = True B=#rp*vwL  
     Exit Function UXoaUW L  
  End If dfGdY"&  
   If ppx = p3x And ppy = p3y Then 9ulJZ\cQ  
     point_in = True )H#Hs<)Qy  
     Exit Function ;Aiuy{<  
  End If &h-d\gMJ  
     eb2~$ ,$  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) +O}6 8N  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) oJR0sbikP  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) gpsEN(.w  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) RG[3LX/  
    sum = aob + boc + cod + doa w"bQxS~$y  
    If 360.01 > sum And sum > 359.99 Then ,:G.V  
       point_in = True s"p}>BjMIC  
    Else  |X`xJL  
       point_in = False {QTfD~z^K  
    End If CN\SxK`,  
End Function

'得到点半径,得到交点坐标函数 .JZoZ.FAb  
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() #QQ\xj  
    '求得中心点坐标 sAfSI<L_  
Dim tt As String MQ5#6vJ  
Dim rt(3) As Single z9U<Z^4z+  
    '判断是否平行 m'XzZmI  
   acx = p3x - p1x 7m{
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   acy = p3y - p1y nM34zVy  
   bdx = p4x - p2x Z$kff-Y4  
   bdy = p4y - p2y kdmannM  
   If acx * bdy = acy * bdx Then 9 bYoWw  
      rt(0) = 0 ^q_0(Vf  
      Exit Function r5Jy( ~  
   Else K_bF)6"  
      '判断斜率存在否 G/J5aj[  
      If p1x = p3x And p2x <> p4x Then l|^p;z:d  
         tt = "ac_n_bd_y" sbZ)z#Tr  
      ElseIf p1x <> p3x And p2x = p4x Then F(^vD_
G  
         tt = "ac_y_bd_n" \$T  
      ElseIf p1x <> p3x And p2x <> p4x Then mMjY I1F  
         tt = "ac_y_bd_y" a[]=*(AZI  
      End If ~tn*y4uK  
    Select Case tt }RYr)  
         Case "ac_n_bd_y" t@QaxZIlt;  
            'bd线段方程 T|Sz~nO}f  
            k_bd = bdy / bdx b/5?)!I  
            b_bd = p2y - k_bd * p2x Ovv~
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            p_x = p1x e3"GC_*#  
            p_y = k_bd * p_x + b_bd 1T!b#x4  
         Case "ac_y_bd_n" Jm0P~E[n  
            'ac线段方程 LoSblV  
            k_ac = acy / acx v*<hE>J0  
            b_ac = p1y - k_ac * p1x WW\u}z.QJ  
            p_x = p2x b%L8mX  
            p_y = k_ac * p_x + b_ac Zk__CgS#  
        Case "ac_y_bd_y" v{$X2z_$w  
           'ac，bd线段都要求 21bvSK  
           k_ac = acy / acx GL_YT.(!  
           b_ac = p1y - k_ac * p1x F?\XhoJ3G  
           k_bd = bdy / bdx  msM  
           b_bd = p2y - k_bd * p2x Xa=oryDt  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) yhJH3<  
           p_y = k_ac * p_x + b_ac 6x)7=_:0  
        End Select *9y)B|P^  
      rt(1) = p_x q,F\8M\$  
      rt(2) = p_y D)U 9xA)J  
     [^$nt  
'计算最大半径 s]50Y-C  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) I'HPy.
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   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 6X~.J4  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) BaZ$pO^  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) H<#M)8  
Dim bb(5) As Single )=;GQ*<8Zs  
  bb(1) = rr1 ztTj2M"  
  bb(2) = rr2 ?1*Ka  
  bb(3) = rr3 d00#;R  
  bb(4) = rr4 E;/WP!/.  
  nb = rr1 y<0zAsT  
For i = 1 To 4 U(P^-J<n1  
    If nb <= bb(i) Then DDQ}&`s  
       nb = bb(i) Atc9[<~WG  
    End If a$r- U_?  
Next i 83K)j"!<X  
    rt(0) = Sqr(nb) 4l7TrCB  
    rr = rt() k\BJs@-  
  End If v/*}M&vo  
         45. -P  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  dG&^M".(
 

~c,CngeL0  
有热压工艺方面的人才或者资料分享下； +*RaX (&  
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 e5RF6roxO  

高手真多！

楼主威武霸气.