[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： yWu80C8q  
9>d$a2nc  
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关键点说几个： >f4H<V-  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） e?3 S0}  
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 4dv+RRpGOv  
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 W1M<6T.{7  

以下是几个重要的函数： 4StiY
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1.判断点在区域中函数 C4&yC81Gm  
2.计算夹角函数 #g\O*oYaw  
3.转置函数 wlKfTJrn&  
4.得到区域中心点，及区域半径函数 ?SRG;G
1  
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） w_q{C>-cR  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Y` Oz\W  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Eb{Zm<TP  
   cax = x2 - x1 k?3NF:Yy7  
   cay = y2 - y1 $3zs?Fd`  
   cbx = x2 - x3 K[PH#dF5,x  
   cby = y2 - y3 qasbK:}  
   mo_jj = cax * cbx + cay * cby Z0s}65BR  
   mo_ca = Sqr(cax * cax + cay * cay) QI'ule  
   mo_cb = Sqr(cbx * cbx + cby * cby) wZ6LiYiHl  
   cos_acb = mo_jj / (mo_ca * mo_cb) vmm#UjwF3  
   'ff_cos = cos_acb A}?n.MAX>  
   If cos_acb >= 1 Then [KMW*pA7  
   nn = 0 vx62u29m  
   ElseIf cos_acb <= -1 Then HWOs   
   nn = 3.14159265258979 W0J d2*]  
   Else @{3$H^  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) A-Be}A  
   End If G?)NDRM  
   'ff_angle = nn Y|FF ;[  
   ff_angle = nn * 180 / 3.14159265258979 rrbD0UzFA  
End Function

'判断点在区域内函数 rT7W_[&P  
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 FFX-kS  
Dim aob, boc, cod, doa, sum As Single `,a6su (?  
  If ppx = p1x And ppy = p1y Then 1=:=zyEEo  
     point_in = True -d5b,leC^  
     Exit Function .P(k |D&  
  End If ?!TFoD2'  
  If ppx = p2x And ppy = p2y Then [Z9 lxZ|  
     point_in = True 2-=Ov@y2k!  
     Exit Function rYez$e^r  
  End If }#):ZPTs  
   If ppx = p3x And ppy = p3y Then 3'tcEFkH  
     point_in = True n'*4zxAA  
     Exit Function nMm4fns  
  End If @
=g Px  
     8*o*?1.  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) d1CQ;,Df<  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) !Q[j;f   
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) -
#@l`kt  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) c"D
%c(:4|  
    sum = aob + boc + cod + doa N~NUBEKcp  
    If 360.01 > sum And sum > 359.99 Then *{WhUHZF  
       point_in = True q[?xf3  
    Else .5$"qb ?  
       point_in = False W D8  
    End If R|&jvG=|  
End Function

'得到点半径,得到交点坐标函数 \dAs<${(  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() ,X`w/ 2O  
    '求得中心点坐标
^mwS6WH6  
Dim tt As String 6_mkt|E=  
Dim rt(3) As Single @!'rsPrI  
    '判断是否平行 oRkh>yj'  
   acx = p3x - p1x /EP RgRX  
   acy = p3y - p1y ehTrjb3k  
   bdx = p4x - p2x _c!$K#Yl{  
   bdy = p4y - p2y lKdd3W"o  
   If acx * bdy = acy * bdx Then +H{TV#+r  
      rt(0) = 0 4og/y0n,l"  
      Exit Function 
XrUc`  
   Else s5s'[<  
      '判断斜率存在否 >U\1*F,Om,  
      If p1x = p3x And p2x <> p4x Then ^sVr#T  
         tt = "ac_n_bd_y" :+ZLK
m  
      ElseIf p1x <> p3x And p2x = p4x Then k\76`!B  
         tt = "ac_y_bd_n" VW`SqU
l  
      ElseIf p1x <> p3x And p2x <> p4x Then C))x#P36  
         tt = "ac_y_bd_y" T W#s)iDi  
      End If =;Q:z^S  
    Select Case tt gpw,bV  
         Case "ac_n_bd_y"
Xb<>AzEM  
            'bd线段方程 q
-hREO  
            k_bd = bdy / bdx \>$3'i=mQ  
            b_bd = p2y - k_bd * p2x 'fjo
uO  
            p_x = p1x I+{2DY/}  
            p_y = k_bd * p_x + b_bd V O\g"Yc  
         Case "ac_y_bd_n" %* k`z#b  
            'ac线段方程 @WCA7DW!  
            k_ac = acy / acx FUVp}>#U  
            b_ac = p1y - k_ac * p1x q6'Q-e)  
            p_x = p2x =u-q#<h4;  
            p_y = k_ac * p_x + b_ac vnN0o5  
        Case "ac_y_bd_y" AqiH1LAE  
           'ac，bd线段都要求 F|a'^:Qs  
           k_ac = acy / acx 9-+N;g!q  
           b_ac = p1y - k_ac * p1x Kn=0AdM  
           k_bd = bdy / bdx 4mHk,Dd9,  
           b_bd = p2y - k_bd * p2x r;^%D(  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ,njlKkFw^Z  
           p_y = k_ac * p_x + b_ac >[2;  
        End Select A?bqDy  
      rt(1) = p_x ZsNZ3;d@u(  
      rt(2) = p_y t"s$YB>}  
     UgLFU#  
'计算最大半径 g=/!Ry=  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) {'p < o$(S  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) IeZ9 "o h  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) *Z$W"JP  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) U8.V Rn  
Dim bb(5) As Single h/Yxm2  
  bb(1) = rr1 8y']kVg  
  bb(2) = rr2 a&2UDl%K  
  bb(3) = rr3 XV}}A^  
  bb(4) = rr4 %8H$62w]  
  nb = rr1 TSD7R  
For i = 1 To 4 Xs{PAS0  
    If nb <= bb(i) Then W#+f2 RR  
       nb = bb(i) 0xx4rpH  
    End If ]$uC~b   
Next i f^-ot@w  
    rt(0) = Sqr(nb) mW$Oi++'d  
    rr = rt() 7},oY""8  
  End If DcNp-X40I  
         ^RJ@9`P&t  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  9DJ&J{2W  

ZT@=d$Z&t  
有热压工艺方面的人才或者资料分享下； z
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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 *~g*J^R
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高手真多！

楼主威武霸气.