[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： m0[JiwPI  
s;!Tz)  
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关键点说几个： V0/O T~gS8  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） A2{s?L,  
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 >xK!J?!K  
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 SM1[)jZ-  

以下是几个重要的函数： `S+B-I0  
1.判断点在区域中函数 aZBb@~
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2.计算夹角函数 .!Q
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3.转置函数 %9Y3jB",2  
4.得到区域中心点，及区域半径函数 'BmLR{[2L  
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） e=#'rDm  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 hUO&rov3@  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single /hksESiU  
   cax = x2 - x1 ro`2IE>  
   cay = y2 - y1 &>$+O>c ,  
   cbx = x2 - x3 y)]L>o~  
   cby = y2 - y3 ^j>w<ljzz  
   mo_jj = cax * cbx + cay * cby #yi&-9B  
   mo_ca = Sqr(cax * cax + cay * cay) t~(|2nTO5  
   mo_cb = Sqr(cbx * cbx + cby * cby)
Exu>%  
   cos_acb = mo_jj / (mo_ca * mo_cb) 6<>T{2b:(p  
   'ff_cos = cos_acb >Ndck2@  
   If cos_acb >= 1 Then %UnL,V9)  
   nn = 0 
SE;Yb'  
   ElseIf cos_acb <= -1 Then N`1W"Rx!  
   nn = 3.14159265258979 eGr;PaG  
   Else d]!`II  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) z [9f  
   End If f&ri=VJY\T  
   'ff_angle = nn 'j27.Ry.  
   ff_angle = nn * 180 / 3.14159265258979 RjW< H6a"K  
End Function

'判断点在区域内函数 wcW8"J'AH  
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 |'ML )`c[  
Dim aob, boc, cod, doa, sum As Single 5N.-m;s  
  If ppx = p1x And ppy = p1y Then SNl% ?j| f  
     point_in = True HJ^SqSm  
     Exit Function Pua|Z x  
  End If ]~!?(d!J/  
  If ppx = p2x And ppy = p2y Then {Z!x]}{M  
     point_in = True ?=#vp /  
     Exit Function s.]<r5v7  
  End If 8DLj?M>N  
   If ppx = p3x And ppy = p3y Then kACgP!~/1  
     point_in = True S;L=W9=wby  
     Exit Function *JT,]7>  
  End If r=74'g  
     Md[M}d8
 
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ^T&@(|o  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) hw9qnSeRy  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ]qpLaBD  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) lNRGlTD%  
    sum = aob + boc + cod + doa 2*)2c[/0F  
    If 360.01 > sum And sum > 359.99 Then Svqj@@_f  
       point_in = True YDxEWK<  
    Else |x#w8=VP-  
       point_in = False jRGslak;  
    End If wY'w'%A?  
End Function

'得到点半径,得到交点坐标函数 +,|aIF  
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() ATzFs]~K;  
    '求得中心点坐标 *'to#_n&W  
Dim tt As String 9,c_(%C  
Dim rt(3) As Single 6m$lK%P{1  
    '判断是否平行 `p'682xI  
   acx = p3x - p1x !YVGT <  
   acy = p3y - p1y q"9 2][}  
   bdx = p4x - p2x X 7R&>Pf  
   bdy = p4y - p2y 
%iR"eEE  
   If acx * bdy = acy * bdx Then +oevNM  
      rt(0) = 0 Kg6[  
      Exit Function N> jQe  
   Else pt$\pQ  
      '判断斜率存在否 PK).)5sW  
      If p1x = p3x And p2x <> p4x Then %5$)w;p.$'  
         tt = "ac_n_bd_y" {|{;:_.>  
      ElseIf p1x <> p3x And p2x = p4x Then W\Df:P {<  
         tt = "ac_y_bd_n" L.?QZN%cN  
      ElseIf p1x <> p3x And p2x <> p4x Then ~J:]cy)Q  
         tt = "ac_y_bd_y" cNl NJ  
      End If Us2IeR  
    Select Case tt %EH{p@nM&-  
         Case "ac_n_bd_y" )lZoXt_3  
            'bd线段方程
Ms 3Sri  
            k_bd = bdy / bdx l=PZlH y1G  
            b_bd = p2y - k_bd * p2x
MAQ(PIc>T  
            p_x = p1x 363KU@`  
            p_y = k_bd * p_x + b_bd Z^!% b  
         Case "ac_y_bd_n" |i\%>Y,  
            'ac线段方程 Y*/e;mG.  
            k_ac = acy / acx =1Hn<Xay0  
            b_ac = p1y - k_ac * p1x 8+@j %l j  
            p_x = p2x }0V aZ<j  
            p_y = k_ac * p_x + b_ac yu>)[|-  
        Case "ac_y_bd_y" U8zCV*ag  
           'ac，bd线段都要求 t>!O
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           k_ac = acy / acx H<9_BA?  
           b_ac = p1y - k_ac * p1x ub
;:"ns}  
           k_bd = bdy / bdx &u2H^ j  
           b_bd = p2y - k_bd * p2x Z`<5SHQd  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) X;]Ijha<*  
           p_y = k_ac * p_x + b_ac UvR.?js(O  
        End Select ezb*tN!  
      rt(1) = p_x 3Fw7q"  
      rt(2) = p_y N*+L'bO  
     Ggry,3X3  
'计算最大半径 kvG.?^ v  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) .*edaDi  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 0`V;;w8  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) zygH-3C7o  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 2]]}
Xvx4#  
Dim bb(5) As Single 2<9&OL  
  bb(1) = rr1 3Cgv($xl&  
  bb(2) = rr2 H<3:1*E  
  bb(3) = rr3 U@9v(TfV  
  bb(4) = rr4 21O@yNpS$  
  nb = rr1 ,_TE@]!$  
For i = 1 To 4 D-FT3Culw  
    If nb <= bb(i) Then vmg[/#  
       nb = bb(i) vnWt8?)]^  
    End If 8<Pi}RH  
Next i D#P]tt.Z  
    rt(0) = Sqr(nb) pgQ^w0BQV  
    rr = rt() .k$Yleg  
  End If g:Q:cSg<  
         +%H=+fJ2}  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  aK]AhOG  

$e{[fmx  
有热压工艺方面的人才或者资料分享下； L4ct2|w}ul  
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 }:u-l3e  

高手真多！

楼主威武霸气.