[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： 1gm/{w6O  
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关键点说几个： (4ci=*3=  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） #IaBl?}r^  
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 :F>L;mp  
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 7G[ GHc>  

以下是几个重要的函数： $sc8)d\B  
1.判断点在区域中函数 0|s$vqc  
2.计算夹角函数 |t65#1  
3.转置函数 I"cQ5gF?A  
4.得到区域中心点，及区域半径函数 Ec*--]j*c  
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） ay:\P.`5)  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 3\p]esse  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single S0.- >"L  
   cax = x2 - x1 nF. ;LM  
   cay = y2 - y1 ^C:{z)"h  
   cbx = x2 - x3 1(:b{Bl  
   cby = y2 - y3 p9&gEW  
   mo_jj = cax * cbx + cay * cby nz&b5Xb2  
   mo_ca = Sqr(cax * cax + cay * cay) [I++>4  
   mo_cb = Sqr(cbx * cbx + cby * cby) "]SJbuzh  
   cos_acb = mo_jj / (mo_ca * mo_cb) f>s#Ngvc  
   'ff_cos = cos_acb 0i`v:Lq%  
   If cos_acb >= 1 Then >uyeI&z  
   nn = 0 5&n988gC8  
   ElseIf cos_acb <= -1 Then AF*ni~  
   nn = 3.14159265258979 GFQG(7G9  
   Else 4[5lX C  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) A{i][1N  
   End If nj~$%vmA  
   'ff_angle = nn iJCY /*C}  
   ff_angle = nn * 180 / 3.14159265258979 q*F~~J!P  
End Function

'判断点在区域内函数 i_[ HcgT-  
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 nJldz;  
Dim aob, boc, cod, doa, sum As Single .KiPNTh'  
  If ppx = p1x And ppy = p1y Then ="5k\1W1M  
     point_in = True Z%Tq1O  
     Exit Function <t?x 'r?@  
  End If +X* F<6mZ  
  If ppx = p2x And ppy = p2y Then E(aX4^]g  
     point_in = True ;e#>n!<u  
     Exit Function xE G+%Uk{  
  End If YiIddQ  
   If ppx = p3x And ppy = p3y Then XJ f+Eh  
     point_in = True @7Q*h   
     Exit Function kz7vbY  
  End If ;_?zB NW  
     4cXAT9  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) D_l/Gxdpr  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) .iOw0z  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y)  /gqqKUx  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) AI^AK0.L  
    sum = aob + boc + cod + doa q;~R:}?@  
    If 360.01 > sum And sum > 359.99 Then 8FO1`%8Oe  
       point_in = True i#L6UKe:Q  
    Else _%A/ )  
       point_in = False `!UaScM  
    End If u4Y6B ]Q  
End Function

'得到点半径,得到交点坐标函数 LFEp  
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() ~fyF&+ibp'  
    '求得中心点坐标 +G5'kYzJ  
Dim tt As String gzl%5`DBw  
Dim rt(3) As Single S[-.tvI;Q  
    '判断是否平行 [TRGIGtq  
   acx = p3x - p1x WafdE  
   acy = p3y - p1y ?~F]@2)5w  
   bdx = p4x - p2x b*lKT]D,  
   bdy = p4y - p2y R19'|TJ  
   If acx * bdy = acy * bdx Then ::p-9F  
      rt(0) = 0 =ied}a :[  
      Exit Function Sp<hai  
   Else er(8}]X8Q  
      '判断斜率存在否 pWMiCXnW  
      If p1x = p3x And p2x <> p4x Then bcq@N  
         tt = "ac_n_bd_y" Zr\2BOcc.l  
      ElseIf p1x <> p3x And p2x = p4x Then YEg .  
         tt = "ac_y_bd_n" zSEr4^Dk4  
      ElseIf p1x <> p3x And p2x <> p4x Then kFS0i%Sr  
         tt = "ac_y_bd_y" o:Ln._bj  
      End If
Q<z)q<e  
    Select Case tt 48lzOG  
         Case "ac_n_bd_y" {&u Rd?(  
            'bd线段方程 0w^jls  
            k_bd = bdy / bdx 613/K`o  
            b_bd = p2y - k_bd * p2x }j&O/Up  
            p_x = p1x uEBQo
P2  
            p_y = k_bd * p_x + b_bd g;$E1U=R-E  
         Case "ac_y_bd_n" w+Ad$4Pf
"  
            'ac线段方程 gs$3)t  
            k_ac = acy / acx x2Ha&  
            b_ac = p1y - k_ac * p1x (:ZPt(1  
            p_x = p2x fW(;
  
            p_y = k_ac * p_x + b_ac |d5ggf.w  
        Case "ac_y_bd_y" ZQ@3P7T  
           'ac，bd线段都要求 Q?Wr7  
           k_ac = acy / acx P~&O4['<  
           b_ac = p1y - k_ac * p1x Gj6<s./  
           k_bd = bdy / bdx 7^HpVcSM  
           b_bd = p2y - k_bd * p2x x]H3Y3  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) yxqTm%?y  
           p_y = k_ac * p_x + b_ac QT_Srw@  
        End Select Xe)Pg)J1  
      rt(1) = p_x pH^ z  
      rt(2) = p_y {>S4#^@}  
     VIetcs  
'计算最大半径 y*_K=}pk  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) '=$TyiU  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 6!@0VI&P  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) O)l%OOv   
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 9_eS`,'  
Dim bb(5) As Single Lg8]dBXu  
  bb(1) = rr1  KvGbDG  
  bb(2) = rr2 %@>YNPD`E  
  bb(3) = rr3 dZF8R  
  bb(4) = rr4 .a {QA  
  nb = rr1 "=FIFf  
For i = 1 To 4  j|ozGO  
    If nb <= bb(i) Then av$  
       nb = bb(i) ;jF%bE3  
    End If <8$Md4r  
Next i R3cg2H  
    rt(0) = Sqr(nb) P>|Ef~j  
    rr = rt() >;m{{nj  
  End If {Wh BoD  
         Vw7WK  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  m9woredS,  

;$z7[+M  
有热压工艺方面的人才或者资料分享下； ydB$4ZB3[  
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 jFG5)t<D  

高手真多！

楼主威武霸气.