[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： KVaiugQ  
q=m'^ ,gPS  

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图片:2.jpg

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关键点说几个： /NFj(+&g+  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） (@VMH !3  
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 Y%^w:|f^  
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 ,HV(l+k {|  

以下是几个重要的函数： {duz\k2  
1.判断点在区域中函数  A,<E\  
2.计算夹角函数 7U"g3a)=  
3.转置函数 5H9z4-i x?  
4.得到区域中心点，及区域半径函数 #A/  
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） p38-l'{#  
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(N$nsi  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single lb3bm)@:  
   cax = x2 - x1 RSRS wkC  
   cay = y2 - y1 #gN&lY:CFn  
   cbx = x2 - x3 ,w4(kcg%iQ  
   cby = y2 - y3 T3<4B!UB&  
   mo_jj = cax * cbx + cay * cby
7xlkZF  
   mo_ca = Sqr(cax * cax + cay * cay) xLajso1g69  
   mo_cb = Sqr(cbx * cbx + cby * cby) l|[N42+  
   cos_acb = mo_jj / (mo_ca * mo_cb) Of#u  
   'ff_cos = cos_acb h7oo7AP  
   If cos_acb >= 1 Then ^uc=f2=>,  
   nn = 0 R) h#Vc(  
   ElseIf cos_acb <= -1 Then SKN`2hD  
   nn = 3.14159265258979 adcE'fA<_  
   Else Wvh#:Z  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) LonxT&"!D  
   End If Ll't>)  
   'ff_angle = nn =y*IfG9b  
   ff_angle = nn * 180 / 3.14159265258979 jB2[(  
End Function

'判断点在区域内函数 K69'6?#  
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 (?c"$|^J  
Dim aob, boc, cod, doa, sum As Single kDioD  
  If ppx = p1x And ppy = p1y Then CAhXQ7w'Z  
     point_in = True j,eo2HaL  
     Exit Function &p@O_0nF  
  End If ZLejcYS  
  If ppx = p2x And ppy = p2y Then #c!lS<z  
     point_in = True M%m4i9~!?  
     Exit Function g3y~bf  
  End If CHX#^0m.  
   If ppx = p3x And ppy = p3y Then /([kh~a  
     point_in = True KZE,bi:~  
     Exit Function k y7Gwc  
  End If kTgEd]^&D  
     x 9fip-  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 1Pu~X \sO  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 8nV+e~-w  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) <]2wn  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) T8$y[W-c  
    sum = aob + boc + cod + doa R-$!9mnr  
    If 360.01 > sum And sum > 359.99 Then CD~.z7,LC  
       point_in = True Vc Z3 X4/  
    Else T0)@pt7>  
       point_in = False )Aqtew+A&  
    End If DvvK^+-~  
End Function

'得到点半径,得到交点坐标函数 4kx N<]  
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() a:w#s}bL  
    '求得中心点坐标 iH@UTE;  
Dim tt As String > ~O.@|  
Dim rt(3) As Single _t^&Ah*  
    '判断是否平行 <LiPEo.R  
   acx = p3x - p1x ym1Y4,  
   acy = p3y - p1y ww1[rCh\+  
   bdx = p4x - p2x K$=zi}J W  
   bdy = p4y - p2y wibNQ`4k  
   If acx * bdy = acy * bdx Then J|73.&B  
      rt(0) = 0 |A(Iti{v  
      Exit Function S f# R0SA  
   Else nxFBID  
      '判断斜率存在否 5{,<j\#L  
      If p1x = p3x And p2x <> p4x Then Mo|2}nf  
         tt = "ac_n_bd_y" ~P-mC@C  
      ElseIf p1x <> p3x And p2x = p4x Then 'I;zJ`Trd  
         tt = "ac_y_bd_n" pQB."[n  
      ElseIf p1x <> p3x And p2x <> p4x Then /)O"l@ }U  
         tt = "ac_y_bd_y" 9\(| D#  
      End If 1'8YkhQ2a  
    Select Case tt )^hbsMhO  
         Case "ac_n_bd_y" }jPSU
do  
            'bd线段方程 N;%6:I./  
            k_bd = bdy / bdx d<Tc7vg4|U  
            b_bd = p2y - k_bd * p2x W(p_.p"  
            p_x = p1x OY({.uVdX  
            p_y = k_bd * p_x + b_bd HGg@ _9tW  
         Case "ac_y_bd_n" J'r^/  
            'ac线段方程 r3?o9D>  
            k_ac = acy / acx K3uRs{l|  
            b_ac = p1y - k_ac * p1x Vxt+]5X  
            p_x = p2x U6s[`H3I{  
            p_y = k_ac * p_x + b_ac "0TZTa1e  
        Case "ac_y_bd_y"
(/] J3  
           'ac，bd线段都要求 \~wMfP8  
           k_ac = acy / acx W2!+z{:m  
           b_ac = p1y - k_ac * p1x GC'O[q+  
           k_bd = bdy / bdx F:DrX_O%  
           b_bd = p2y - k_bd * p2x |y!A&d=xYn  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) *VN6cSq  
           p_y = k_ac * p_x + b_ac q@2siI~W  
        End Select Znv,9-  
      rt(1) = p_x -UT}/:a  
      rt(2) = p_y d/@,@8:  
     BJ(M2|VH  
'计算最大半径 V(*
(F7+  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 93hxSRw  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) bg0

Wnl  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) \73ch  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Ek}A
]zC  
Dim bb(5) As Single e96k{C`j0  
  bb(1) = rr1 #X"@<l4F  
  bb(2) = rr2 +"VP-s0  
  bb(3) = rr3 hpk7 Anp  
  bb(4) = rr4 8dhUBJ0_  
  nb = rr1 .N(p=9  
For i = 1 To 4 $ME)#(  
    If nb <= bb(i) Then a'IdYW0  
       nb = bb(i) U/BR*Zn]*  
    End If 9nbLg5P  
Next i 4KrL{Z+}  
    rt(0) = Sqr(nb) #$y?v%^  
    rr = rt() ehY5!D1Q  
  End If vfo~27T{(  
         HpnWoDM  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  fa2kG&, _  

LB?u8>a' I  
有热压工艺方面的人才或者资料分享下； G;XxBA  
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 Xm2z}X(%  

高手真多！

楼主威武霸气.