[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： dT|XcVKg  
OqtGKda  
fCt|8,-H  

关键点说几个： zx@!8Z  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） IQ&PPC  
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 'LgRdtO6  
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 Po?MTA  

以下是几个重要的函数： TV`1&ta  
1.判断点在区域中函数 }c G)$E  
2.计算夹角函数 t/|0"\ p  
3.转置函数 9'MGv*Ho  
4.得到区域中心点，及区域半径函数 h@RpS8!Bi  
5.再有就是若干个点抽取其中一部分；或者采用随机分布（该方法会有重合点，所以没采用） @$ 7 GrT  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 XG|N$~N+2  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single HV%/baX]  
   cax = x2 - x1 y:)^*2GA-B  
   cay = y2 - y1 B:h<iU:'D  
   cbx = x2 - x3 X]y:uD{  
   cby = y2 - y3 C0N :z.)4  
   mo_jj = cax * cbx + cay * cby C1^%!)  
   mo_ca = Sqr(cax * cax + cay * cay) b8K]>yDAh  
   mo_cb = Sqr(cbx * cbx + cby * cby) q7 PCMe  
   cos_acb = mo_jj / (mo_ca * mo_cb) ;6/WjUDw<|  
   'ff_cos = cos_acb 1(p:dqGS  
   If cos_acb >= 1 Then 1L,L/sOwB&  
   nn = 0 4iAF<|6s  
   ElseIf cos_acb <= -1 Then 7y$\|WG?!r  
   nn = 3.14159265258979 um%_kX  
   Else N sdpE?V  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) xn*$Ty+  
   End If .B]l@E-u  
   'ff_angle = nn U:8[%a  
   ff_angle = nn * 180 / 3.14159265258979  VAiJL  
End Function

'判断点在区域内函数 k[@P526  
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 JP8}+  
Dim aob, boc, cod, doa, sum As Single -rO34l  
  If ppx = p1x And ppy = p1y Then G
 _cJI  
     point_in = True @v2<T1UC  
     Exit Function f$dPDbZQ  
  End If )JzY%a SP  
  If ppx = p2x And ppy = p2y Then gGMfy]]R  
     point_in = True z>W:+W"o  
     Exit Function Ay(p~U;gN*  
  End If @` KYgjjH  
   If ppx = p3x And ppy = p3y Then HoPpUq5,  
     point_in = True %)j&/QdzF&  
     Exit Function xFF!)k #  
  End If ZA="Dac  
     529b. |  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) D[+LU(  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 2j+w5KvU  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) >[ B.y  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ny{C,1QG  
    sum = aob + boc + cod + doa s70Z&3A  
    If 360.01 > sum And sum > 359.99 Then ZPZh6^cc  
       point_in = True aDdxR:  
    Else poBeEpbs  
       point_in = False <IR
#W$[  
    End If cK'g2S  
End Function

'得到点半径,得到交点坐标函数 }r,M(Zr  
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() rDFrreQP  
    '求得中心点坐标 4AJ]qu  
Dim tt As String `4*I1WZW  
Dim rt(3) As Single S
WrTM  
    '判断是否平行 rMwa6ZO'm;  
   acx = p3x - p1x ]q"&V\b  
   acy = p3y - p1y =d8Rij-  
   bdx = p4x - p2x 8xB-cE  
   bdy = p4y - p2y ]ogifnwv  
   If acx * bdy = acy * bdx Then 6!_Wo\_%  
      rt(0) = 0 TOHz3=  
      Exit Function J2qsZ  
   Else ob>)F^.iS  
      '判断斜率存在否 Hf('BagBL  
      If p1x = p3x And p2x <> p4x Then hJM&rM7  
         tt = "ac_n_bd_y" 5az%yS  
      ElseIf p1x <> p3x And p2x = p4x Then Wx0i_HFR  
         tt = "ac_y_bd_n" b d 1^  
      ElseIf p1x <> p3x And p2x <> p4x Then `%Fp'`ZM$8  
         tt = "ac_y_bd_y" <ww D*t  
      End If H?"M&mF  
    Select Case tt ]+:yfDtZd  
         Case "ac_n_bd_y" d[
t0K]  
            'bd线段方程 ;^/ruf[t  
            k_bd = bdy / bdx $U[d#:]  
            b_bd = p2y - k_bd * p2x UC+Qn  
            p_x = p1x ; $rQ  
            p_y = k_bd * p_x + b_bd ?J2{6,}O*.  
         Case "ac_y_bd_n" GQt5GOt  
            'ac线段方程 Onx6Fy]L  
            k_ac = acy / acx Vq3NjN!+5  
            b_ac = p1y - k_ac * p1x |!(8c>]Bo  
            p_x = p2x SNqSp.>-U"  
            p_y = k_ac * p_x + b_ac _\>y[e["p  
        Case "ac_y_bd_y" L
$=R/l  
           'ac，bd线段都要求 cB,^?djJ3  
           k_ac = acy / acx GXZ="3W |  
           b_ac = p1y - k_ac * p1x ;"&?Okz  
           k_bd = bdy / bdx XKGiw 2 C  
           b_bd = p2y - k_bd * p2x eP2Q2C8g  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) w9Yx2  
           p_y = k_ac * p_x + b_ac tz]0F5  
        End Select Y@ v][Q  
      rt(1) = p_x 1 fcV&qHR  
      rt(2) = p_y zh) &6'S\  
     ~ n<|f  
'计算最大半径 ^X&`YXjuN  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) b=Nsz$[  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) :Pq&l.  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) DG;u_6;JR  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) U,2OofLM  
Dim bb(5) As Single w}1IP-  
  bb(1) = rr1 mH,s!6j?Vp  
  bb(2) = rr2 v.W!  
  bb(3) = rr3 mywxV  
  bb(4) = rr4  _ %mm  
  nb = rr1 Mzg'$]N  
For i = 1 To 4
(m1m}* @  
    If nb <= bb(i) Then #w L(<nE  
       nb = bb(i) 6teu_FS  
    End If d*+}_EV)Y3  
Next i Nd>zq  
    rt(0) = Sqr(nb) =-!jm? st*  
    rr = rt() .g/!u(iy  
  End If <vl(a*4a  
         :(enaHn#~  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  \@2sI  

/9y'UKl7[  
有热压工艺方面的人才或者资料分享下； a(o[ bH.|;  
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`I  

高手真多！

楼主威武霸气.