[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： 9Q^>.^~^  
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关键点说几个： \UGs_5OT  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） hqFK2 lR  
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 Xl2Fgg}#  
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 JnmJN1@I  

以下是几个重要的函数： be$wGO=Ts  
1.判断点在区域中函数 (JocnM|U  
2.计算夹角函数 ]"q)X{G(+  
3.转置函数 uz&CUvos  
4.得到区域中心点，及区域半径函数 \Z ] <L  
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） +AtZltM i  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 G>M# BuU  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single @7"xDgA  
   cax = x2 - x1 F6}Pwz[c  
   cay = y2 - y1 KY!  
   cbx = x2 - x3 H(lq=M0~  
   cby = y2 - y3 q<@f3[A  
   mo_jj = cax * cbx + cay * cby 14]!LgH  
   mo_ca = Sqr(cax * cax + cay * cay) 9FP6Z[4  
   mo_cb = Sqr(cbx * cbx + cby * cby) ?#<Fxme  
   cos_acb = mo_jj / (mo_ca * mo_cb) e/r41  
   'ff_cos = cos_acb KX"?3#U#Fm  
   If cos_acb >= 1 Then @rRBo:0%  
   nn = 0 >O&(G0!N+}  
   ElseIf cos_acb <= -1 Then yXh=~:1~  
   nn = 3.14159265258979 y/$WjFj3"  
   Else >e/;  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) w+=>b  
   End If !<h*\%;  
   'ff_angle = nn !Z YMks4  
   ff_angle = nn * 180 / 3.14159265258979 AZ(["kh[  
End Function

'判断点在区域内函数 pD9*WKEf*  
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 nC
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Dim aob, boc, cod, doa, sum As Single <K=:_  
  If ppx = p1x And ppy = p1y Then ZK[4n5}  
     point_in = True S`8 h]vX  
     Exit Function 7m~+
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  End If ax[-907  
  If ppx = p2x And ppy = p2y Then /+1+6MqRn*  
     point_in = True \L}Soe'  
     Exit Function B# |w}hj  
  End If H1yl88K  
   If ppx = p3x And ppy = p3y Then r,(rWptf4  
     point_in = True 'v GrbmK  
     Exit Function I5mnV
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  End If v,bes[Ik  
     *NS:X7p!V  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) BKPXXR  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) btkD<1{g  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Zgkk%3'^'  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) "^fcXV9Wp  
    sum = aob + boc + cod + doa ^GQ+,0Yy  
    If 360.01 > sum And sum > 359.99 Then |>5NH'agV  
       point_in = True 3BAls+<p o  
    Else y))d[1E  
       point_in = False 3lcd
:=  
    End If TppR \[4]  
End Function

'得到点半径,得到交点坐标函数 nsIx5UA_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() z$ZG`v>0  
    '求得中心点坐标 9_)*b  
Dim tt As String cK%Sty'8+  
Dim rt(3) As Single b
W\OKI1  
    '判断是否平行 87l(a,#J  
   acx = p3x - p1x \2KwF}[m  
   acy = p3y - p1y Au<NUc 2  
   bdx = p4x - p2x Jz(wXp  
   bdy = p4y - p2y .;&c<c|  
   If acx * bdy = acy * bdx Then R".~{6  
      rt(0) = 0 Xb6X'rY  
      Exit Function :c[iS~ ~Y  
   Else 0Mpc#:a%1  
      '判断斜率存在否 LfOXgn\  
      If p1x = p3x And p2x <> p4x Then [vh&o-6  
         tt = "ac_n_bd_y" _;/onM  
      ElseIf p1x <> p3x And p2x = p4x Then bHZXMUewC  
         tt = "ac_y_bd_n" O W`yv  
      ElseIf p1x <> p3x And p2x <> p4x Then P>n}\"z4  
         tt = "ac_y_bd_y" aqJ>l}{  
      End If 04g=bJ  
    Select Case tt r#hA kOw  
         Case "ac_n_bd_y" 1(t{)Z<  
            'bd线段方程 Ox
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            k_bd = bdy / bdx f|Dq#(^\  
            b_bd = p2y - k_bd * p2x u}Kc
>/AF  
            p_x = p1x -7{qTe{  
            p_y = k_bd * p_x + b_bd Xy/lsaVskX  
         Case "ac_y_bd_n" 9jW/"  
            'ac线段方程 50h?#u6?  
            k_ac = acy / acx z0|%h?N  
            b_ac = p1y - k_ac * p1x zr#n^?m  
            p_x = p2x 4+46z|  
            p_y = k_ac * p_x + b_ac d h5%  
        Case "ac_y_bd_y" K;j}qJvsb  
           'ac，bd线段都要求 ukNB#2"  
           k_ac = acy / acx 1@" L  
           b_ac = p1y - k_ac * p1x **p|g<wvY*  
           k_bd = bdy / bdx L-SWs8  
           b_bd = p2y - k_bd * p2x o&WKk5$  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) kD1[6cJ!=.  
           p_y = k_ac * p_x + b_ac <uq#smY  
        End Select Q|T9tc
->  
      rt(1) = p_x 2smQD8t  
      rt(2) = p_y %49^S&  
     (NB\wJg $  
'计算最大半径 ROH 2KSt  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) uRIa Nwohv  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 5}-e9U  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) U4PnQ K,  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) o+-G@16  
Dim bb(5) As Single +2Xq+P  
  bb(1) = rr1 HYqDaRn  
  bb(2) = rr2 3hUU$|^4gm  
  bb(3) = rr3 hf#[Vns  
  bb(4) = rr4 \ct7~!qM  
  nb = rr1 J+IkTq
w  
For i = 1 To 4 &4]~s:F  
    If nb <= bb(i) Then /D@(o`a  
       nb = bb(i) tUzef  
    End If oY;=$8y<q  
Next i 67,@*cK3?J  
    rt(0) = Sqr(nb) ~# ~XDcc  
    rr = rt() slPLc  
  End If >U4hsr05  
         UB5X2uBv  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  (ex^=fv  

Ul EP;  
有热压工艺方面的人才或者资料分享下； wG&
+*,}  
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>reG,G  

高手真多！

楼主威武霸气.