[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： v4<x 4  
*o[*,1Pw  

描述:请输入描述

图片:2.jpg

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关键点说几个： 18!0Hl>  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 'u.`!w '|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 mvxg|<  
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
'gE_xn7j  

以下是几个重要的函数： 5R,/X  
1.判断点在区域中函数 x<=+RYz#^:  
2.计算夹角函数 +3t(kQ  
3.转置函数 z0Gh |N@)  
4.得到区域中心点，及区域半径函数 GI7CZ  
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） ;LH?Qu;e  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Khw!+!(H  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single fwxyZBr  
   cax = x2 - x1 %r~TMU2"  
   cay = y2 - y1 *Xl&N- 04  
   cbx = x2 - x3 !OWV* v2  
   cby = y2 - y3 G*wn[o(^j  
   mo_jj = cax * cbx + cay * cby s
OLo[5y'  
   mo_ca = Sqr(cax * cax + cay * cay) ?~S\^4]  
   mo_cb = Sqr(cbx * cbx + cby * cby) OjeM#s#N!  
   cos_acb = mo_jj / (mo_ca * mo_cb) UXa3>q>  
   'ff_cos = cos_acb K$' J:{yY  
   If cos_acb >= 1 Then iQin|$F_O  
   nn = 0 0t*q5pAG".  
   ElseIf cos_acb <= -1 Then {u46m   
   nn = 3.14159265258979 8u;l<^<  
   Else "W:'cIw  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) {My/+{eS!?  
   End If 6eK18*j%H  
   'ff_angle = nn 0Km{fZYq7;  
   ff_angle = nn * 180 / 3.14159265258979 ]rHdG^0uss  
End Function

'判断点在区域内函数 o& $Fc8bH  
Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean )>$xbo")k  
Dim aob, boc, cod, doa, sum As Single X )g
<F  
  If ppx = p1x And ppy = p1y Then =1yU& PJ  
     point_in = True Y R#_<o  
     Exit Function 0P\)L`cG  
  End If qV^,muyoG  
  If ppx = p2x And ppy = p2y Then NBE)DL  
     point_in = True cq %=DZ  
     Exit Function "i4@'`r  
  End If 2Wq)y1R<T  
   If ppx = p3x And ppy = p3y Then <q%buyQna  
     point_in = True 0D:J d6\  
     Exit Function 8KT|ixs  
  End If Sep}{`u  
     HDA!;&NRS  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ~0t]`<y=  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Nm:nSqc  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) pvP|.sw5G  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) x(5>f9bb  
    sum = aob + boc + cod + doa qS|bpC0x  
    If 360.01 > sum And sum > 359.99 Then SpjL\ p0  
       point_in = True
[L] ca*  
    Else ^cDHyB=v4d  
       point_in = False \BbemCPAm  
    End If O,]t.1V  
End Function

'得到点半径,得到交点坐标函数 QOcB ]G  
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() {1>V~e8t  
    '求得中心点坐标 \ :1MM  
Dim tt As String yx4B!U  
Dim rt(3) As Single 89U<9j   
    '判断是否平行 tB'F`HM:mq  
   acx = p3x - p1x \NDSpT<Z  
   acy = p3y - p1y <hkg~4EKc  
   bdx = p4x - p2x o2@8w[r  
   bdy = p4y - p2y |/Am\tk#13  
   If acx * bdy = acy * bdx Then |Xlc2?e  
      rt(0) = 0 S`5^H~
 
      Exit Function $A9!} `V  
   Else 12~zS  
      '判断斜率存在否 cx&jnF#$  
      If p1x = p3x And p2x <> p4x Then `QC{}Oo^  
         tt = "ac_n_bd_y" "/[-U;ck  
      ElseIf p1x <> p3x And p2x = p4x Then a9(1 6k  
         tt = "ac_y_bd_n" 8tK8|t5+  
      ElseIf p1x <> p3x And p2x <> p4x Then PBTGN;y  
         tt = "ac_y_bd_y" nG1mx/w  
      End If #^"\WG7{  
    Select Case tt #'mb9GWD3  
         Case "ac_n_bd_y" PnJr  
            'bd线段方程 @AvXBMq|  
            k_bd = bdy / bdx <bDjAVq  
            b_bd = p2y - k_bd * p2x zT6ng#  
            p_x = p1x BBm.;=8@ ^  
            p_y = k_bd * p_x + b_bd -P]J:7*0?\  
         Case "ac_y_bd_n" EtWpBg  
            'ac线段方程 E%:!* 9  
            k_ac = acy / acx R)?K+
cJ%  
            b_ac = p1y - k_ac * p1x yYkk0 3  
            p_x = p2x ,]w-!I  
            p_y = k_ac * p_x + b_ac MGCwT@P  
        Case "ac_y_bd_y" KwlN  
           'ac，bd线段都要求 x#|=.T  
           k_ac = acy / acx \O/EY&  
           b_ac = p1y - k_ac * p1x L~cswG'K  
           k_bd = bdy / bdx pv~XZ(J.1  
           b_bd = p2y - k_bd * p2x #r `hK)  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) {d.`0v9h  
           p_y = k_ac * p_x + b_ac WIb\+!  
        End Select {6!Mf+Xq  
      rt(1) = p_x \7nlwFAO  
      rt(2) = p_y Ka1
F7b  
     wO@b=1j  
'计算最大半径 @tdX=\[~  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) f#pT6  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) &THM]3:  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ps[TiW{q;  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) B!K{y>|.  
Dim bb(5) As Single pv+FP
B  
  bb(1) = rr1 <T[%03  
  bb(2) = rr2 c>{6NSS -  
  bb(3) = rr3 f&bY=$iff  
  bb(4) = rr4 j01.`G7Q  
  nb = rr1 [-f0s;F1%  
For i = 1 To 4 'm# -)R!  
    If nb <= bb(i) Then >|KfO>  
       nb = bb(i) 5m&{f>]T  
    End If U5jY/e_  
Next i 12])``9  
    rt(0) = Sqr(nb) sTU]ntoQqR  
    rr = rt() [&k[k)  
  End If y4$UPLm
  
         A0#
K@  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  *_`T*$  

$SSE\+|3  
有热压工艺方面的人才或者资料分享下； 0bQaXxt|p  
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 /*`BGNkYY  

高手真多！

楼主威武霸气.