[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： ]F4QZV
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关键点说几个：
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1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） LZV-E=`  
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 0cS$S Mn{  
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 q`*.F#/4c  

以下是几个重要的函数： ${Un#]
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1.判断点在区域中函数 m!FuC=e  
2.计算夹角函数 /wJ#-DZ  
3.转置函数 & kC  
4.得到区域中心点，及区域半径函数 IuXgxR%  
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） <P h50s4  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Kv@P Uzu  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single p1Ulo
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   cax = x2 - x1 !n-Sh<8  
   cay = y2 - y1 Hu|Tj<S  
   cbx = x2 - x3 _.s,gX  
   cby = y2 - y3
AG,><UP  
   mo_jj = cax * cbx + cay * cby s<YN*~  
   mo_ca = Sqr(cax * cax + cay * cay) IBa0O|*6  
   mo_cb = Sqr(cbx * cbx + cby * cby) >$m<R&  
   cos_acb = mo_jj / (mo_ca * mo_cb) 8jz>^.-o  
   'ff_cos = cos_acb yj:@Fg-3g  
   If cos_acb >= 1 Then m*y&z'e\  
   nn = 0 :E")Zw&sW3  
   ElseIf cos_acb <= -1 Then 0|AgmW_7 .  
   nn = 3.14159265258979 W8& )UtWQ  
   Else h.Qk{v  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) }b2YX+/e$f  
   End If c+FTt(\8.  
   'ff_angle = nn q1r
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   ff_angle = nn * 180 / 3.14159265258979 H'WYnhU&  
End Function

'判断点在区域内函数 dXTD8 )&  
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 Z1fY' f  
Dim aob, boc, cod, doa, sum As Single V*n$$-5 1-  
  If ppx = p1x And ppy = p1y Then X.<3/  
     point_in = True ~xqiasE#K  
     Exit Function T";evM66  
  End If i:YX_+n  
  If ppx = p2x And ppy = p2y Then Z )c\B  
     point_in = True uw3vYYFX  
     Exit Function 1m5l((d  
  End If 'HWl_M  
   If ppx = p3x And ppy = p3y Then 8&EJ.CQ  
     point_in = True Hhtl~2t!0  
     Exit Function 6xDk3  
  End If ,&BNN]k  
     )%^l+w+&  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) uG
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    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) j sPavY  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 6Amt75RY  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) CR$wzjP j  
    sum = aob + boc + cod + doa "6d0j)YO  
    If 360.01 > sum And sum > 359.99 Then !H\;X`W|~D  
       point_in = True l>;hQh  
    Else
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       point_in = False ,P9F*;Dj  
    End If 4bk`i*-O  
End Function

'得到点半径,得到交点坐标函数 g(pr.Dw6  
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() 9`Qa/Y!  
    '求得中心点坐标 8gavcsVE[  
Dim tt As String ;~0q23{+;U  
Dim rt(3) As Single }W^@mi  
    '判断是否平行 x\'3UKQP+^  
   acx = p3x - p1x f+9eB
  
   acy = p3y - p1y v7pu  
   bdx = p4x - p2x ,a&,R*r@&  
   bdy = p4y - p2y ,< g%
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   If acx * bdy = acy * bdx Then [y8(v ~H  
      rt(0) = 0 E#_/#J]UQn  
      Exit Function |fKT@2(  
   Else 4^r6RS@z  
      '判断斜率存在否 /Pextj<  
      If p1x = p3x And p2x <> p4x Then "m{i`<,  
         tt = "ac_n_bd_y" ,Vq$>T@z  
      ElseIf p1x <> p3x And p2x = p4x Then ]){ZL  
         tt = "ac_y_bd_n" ;=n}61  
      ElseIf p1x <> p3x And p2x <> p4x Then F^/KD<cgK  
         tt = "ac_y_bd_y" 2V]a+Cgk  
      End If 1?BLL;[a8  
    Select Case tt &?y@`',a0{  
         Case "ac_n_bd_y" gIrbOMQ7  
            'bd线段方程 .#~!w!T  
            k_bd = bdy / bdx pnuo;rs  
            b_bd = p2y - k_bd * p2x dDA8IW![S  
            p_x = p1x G2N0'R"  
            p_y = k_bd * p_x + b_bd @Y`Z3LiR$  
         Case "ac_y_bd_n" qRaPh:Q'  
            'ac线段方程 {XIpHr  
            k_ac = acy / acx 8Ygf@*9L4  
            b_ac = p1y - k_ac * p1x %T$>E7]!  
            p_x = p2x b_`h2dUq  
            p_y = k_ac * p_x + b_ac K&&T:'=/  
        Case "ac_y_bd_y" v)np.j0V7  
           'ac，bd线段都要求 LCSvw  
           k_ac = acy / acx qv(3qY  
           b_ac = p1y - k_ac * p1x OCu_v%G0  
           k_bd = bdy / bdx M@KQOAzt  
           b_bd = p2y - k_bd * p2x AS]8rH  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) "8%$,rG1&  
           p_y = k_ac * p_x + b_ac `Njvk  
        End Select sSfP.R  
      rt(1) = p_x _`p-^I  
      rt(2) = p_y p>eYi \'  
     7zx xO|p[  
'计算最大半径 K!ILO  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) cWo>DuW&  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) qqo#H O  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) mxZ+r#|di  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) omg#[  
Dim bb(5) As Single lusUmFm'*  
  bb(1) = rr1 Q3%]  
  bb(2) = rr2 E[#VWM I  
  bb(3) = rr3 V'#R1x"3  
  bb(4) = rr4 _IdW5G  
  nb = rr1 #w%-IhP  
For i = 1 To 4 KDb j C'3  
    If nb <= bb(i) Then *lA+-gkK*  
       nb = bb(i) ##BbR  
    End If qpFxl  
Next i 31c*^ZE.  
    rt(0) = Sqr(nb) F?tWx+N<{  
    rr = rt() $)@D(m,ybd  
  End If 3O;H&  
         WZ>nA[/  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  C^LxuUW  

Q*T'tkp  
有热压工艺方面的人才或者资料分享下； bD,X.  
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 [s[ZOi!;I  

高手真多！

楼主威武霸气.